Finally, a video that gives this seriously novice RVer a great overview that takes the intimidation away. Still have much to learn but this gives me a base to build upon.
You are ‘da bomb’!!!! Instead of one T-fuse I used an MTBF fuse on each positive battery terminal, just a slight edge on safety. I also put an on-off switch on the positive side (after the shunt of course) so anytime I have to work on the positive battery cables there is no ground connection for them to short across a random wrench or dropped screwdriver.
I'm an electrical engineer, and I'm impressed with the level of design detail in this. I would recommend some better lugs for the high current cables, with more metal and surface area to connect to the batteries. This implementation is forcing a lot of electrons through some (IMO) undersized cable lugs, which can get hotter than they should. Nice job, especially on the fusing and disconnects.
This is the second time I’ve watch this video because I figured out a way to get the multiplus II to fit in my compartment. Going from the original multiplus Will make everything operate so much better. Thank you very much for the video Jared.
Thank you! thank you! thank you! Brother, I cannot thank you enough. Your videos, diagrams and knowledge that you have passed on, has taken the fear out of doing this setup. My father and I were able to put together pretty much the same system you showed above...including the install of the cerbo gx. Took us 2 days to assemble, one day to sort everything out and install and we went active on day 3. Following your diagrams and videos allowed us to have a trouble free and very successful install and first flip of the power over to batteries to run our rig! We have been on battery power now for 48 hours and it is awesome! Our whole 50amp rig now runs off batteries!!! Thank you Jared!!
Great video Jared! installed our MPII a month ago. Just finished a trip to 30 amp spot and it worked great. Ran both a/c units. batteries never got below 80%.
@@mountaingrownnomad4212 Air conditioners draw more than 30 amps so the MPII makes up the difference from batteries - and not always sunny enough for solar to keep up at the same time (which is why battery bank sizing is so important)
Jared- another great review! Thank you for taking the time to share your techniques and processes! Your'e one of the channels that I follow and take a lot of advice from! I appreciate everything you and your family does for the RV community! Stay safe out there! Cheers!
your vids are GREAT!! Ive been ready to install an inverter for the past year and a half, but ive not been able to get the information ive needed....til now. thank you... its nice to have the parts list to work from when trying to choose parts, but there is way more parts (options) listed than is shown in the video.... it would be so helpful if the parts shown in the vid were separate from the optional parts... OR, mark them as optional.... I watched your previous video using the SPS unit, only to find out the SPS unit is no longer made, which brought me here... and now, as im trying to make a "to purchase" list, I find myself confused as to which of the parts on that list is needed for a complete install of a victron inverter/charger on a motorhome.... I want to run 1 AC unit, and still have power to operate the microwave for a short period... the MH has 30a shore power, and an 800amp battery bank.... thanks for any additional help that you can offer.
We also use a Micro-Air Easy Start on our Air conditioner, which is 13,500 BTU. We're looking at buying a Victron MultiPlus 3000 watt to power it. We were worried we might need to scale up to something that's 5000 watt or higher. Glad to hear it's working for you guys!
Jared - your wiring diagrams and videos are awesome and very much appreciated ....just hit the switch on my 300 amp hour battery bank / Multiplus 3000 and Victron dc to dc charger and it is awesome. First evening on the road arrived in a thunderstorm and just ran the ac on batteries only to wait out the storm .....thanks again for taking the time to share so much!
I also have a Multiplus 11 48volt 3000watt In Australia 🇦🇺 and love it I can run my 240 volt hot water and Air fryer and electric kettle and induction cooktop with no issues But obviously not at the same time
Great Review Jared! Just want to make sure I fully understand your setup. Tell me if I've got my couple of points right. 1) Your switch marked RV Load Disconnect cuts power from the MPPT to the Batteries. 2) Your Bus Bars are used for 12V supply to your 12V Breaker panel section and your Tow Vehicle Charging from either the MPPT or Battery as situation permits, if MPPT has higher voltage than Battery, it will charge batteries and feed 12V Fusebox. (Sorry not sure if MPPT is powered from Solar only or 12V battery or Both as available.) Thanks for all your hard work!
This inverter fits my needs perfectly, thank you for sharing. And I'd be interested in all the bells and whistles that you may add (like you mentioned in your previous video). Great job on the install, it's very clean.
This was awesome! Do you have another video that shows how you run the inverter power to the panel? You show the conduit, did you remove the underskirt and then run the conduit from the basement to the distribution panel?
You Rock!!!! Thanks so much for the Diagram! Now if the multi 2 will come available I can finally order it! But again thank you so much for making the video!
I've had the Victron MultiPlus 3000 for 3 years with 4 BB batteries and 600 watt of Solar. My rv is a 30 amp rv and 3000 watt Onan QD. We love the system.
Please continue to provide more videos on testing and smart adaptations around the MultiPlus II. I am moving in this direction myself, also using newer Victron tech, tho at a slower pace. Thanks for being there for us.
Beilliant, professional, top marks. There's a lot of videos out there on solar, inverters etc., but this is the best I've seen. So good, i would like to copy that. Subscribed!!!
Great video Jared. I installed this new inverter last month and it has been working flawlessly. Love it! Glad to hear you prefer it over the old Multiplus and SPS.
Congratulations on getting one! Glad to hear it’s working for you. I saw on the forums they are working on an update to display line one and line 2 info properly. I’m assuming that will work for Bluetooth and for the Cerbo GX. It’s one thing I love about Victron is they continually innovate and update.
@@AllAboutRVs Yes, I saw that as well. Victron seems to be very attentive to their customer's needs. It sounds like the firmware update is still a few months away but I'm just glad they are doing it! I love all your videos Jared. You have a very calm demeanor and do a great job explaining things concisely. Well done!
This is way awesome. Now I have to get one and figure out how to wire it (run the 50 amp shore from the back to the front pass through, and back to the middle where the breaker panel is.
Excellent Job Jared! Truly excellent. Your Installation and your visual schematics are spot on to how I would design and install equipment back in the day at KPNX Ch 12. Wish I was there to help you with that project! It must have been an overall fun, but challenging install. But now that you have completed it- No Regrets only pure satisfaction.
If you're handy you can get 280Ah of Lischen or Eve LiFePO4 cell shipped from China for ~$500 and add a $100 Daly BMS and have nearly as much capacity as 3x those for less =)
Great Vid! Thank you. So, I see you've switched to the Smart Shunt and no longer have the BlueTooth Battery monitor/display. Is this because these two pieces of equipment are redundant?
Novice here, but can I still have a Generator following the schematic as shown? Otherwise, thanks for the lessons, you have made a difference in the life of my wife (Hospital Nurse, I'm sure there are more too) in theses troubled times and how I can help divert her attention away from the yuk and to an enjoyable time away from it all! Ty.
As always, great video. I would love to see a "shopping list" for things in the diagram. I would like to do the same install for my 50 amp GD, and build in stages.
@@AllAboutRVs Yes, great video and diagrams. However I am also building this set-up in stages. I am Solar prepped and have an onboard gen and have the same three Lion batteries and Victron Multiplus II on order. Can you post a diagram and shopping list sans the solar?
I've been using your diagram for my Multiplus ll install with all the same basic components for the exception that I'm using a Linx Distributor instead of the Bus Bars and separate fuses for the solar controller and dc to dc charger that will feed into the Linx Distributor as well as the smart shunt....I would love to see wiring diagram that included a Linx Distributor.
Thanks for the great video!! Question and sorry if you answered this already. 1. You talked about the orientation of the inverter as vertical. Can you mount horizontally? 2. My rig is “inverter ready” with wiring ready. Question is that I have labeled “inverted outlet” plugs in my rig… if I wire the inverter with the “inverter ready” wiring. Will it only power those inverted outlets? 3. If so, if I want to power the entire rig I should run new wiring from inverter directly to the rig panel correct? Thanks for your time and hope to meet up on the road somewhere.
Nice work!... BTW, on your diagram: You may consider connecting the "RV Load Disconnect and Fuse" on the "load" side of the (+) Busbar. That way the MPPT can still charge the Batteries if/when you decide to disconnect the "DC loads". Also, have you considered a "Victron Lynx Distributor"? (it makes for a real clean look)
I have purchased the Victron distributor and have a similar model GD RV. I am planning this system in my RV.. I’ve built a backer board and the made shelf brackets and am starting to lay out the parts. I’m going with a larger 150/100 mppt and space is starting to become an issue….the distributor and the 150/100 charge controller add a considerable footprint to what Jared shows here.
Hey Jared. Hope you're doing well. We have a 2023 Grand Design Reflection Travel Trailer and an Onan 30A portable inverter generator. I am getting ready to install a Victron MultiPlus II Inverter. Since I'll only be using the generator with my power cord, when I am not on shore power, is there any need for an ATS? BTW, your videos were a HUGE help when I installed my two Battleborn GC3 batteries...thank you! The inverter is the next step!
Hey Jared, love the video. Would you be able to put up the design of your battery box on this link. I really like to cleanliness of those lion batteries together. Thanks
Incredible power management setup. Love the clear explanation and masterful diagram. Where’s the best place for me to find more information on DC to DC battery chargers?
Jared have you done a video of how you mounted the bracket that holds the batteries? I love this set up and want to mimic it in our rig as we have the same GD Refelection but we are a 303rls (which is the same front compartment). Would really appreciate a step by step to do that. Thanks in advance and we love your videos!!!
*** You gave some really good info I’m looking for. BUT- to be clear, in power share mode it only shares or boosts 120 volts on both legs if connected to 30 amp or 15 amp mode and the inverter only does 120v?? What happens if you turn the 220v A/C on?? I’m not really understanding that part of it. I really want to know more on the power sharing feature since I have a 50 amp trailer with 3 /c units on the roof. Can you make a video solely on this feature and the warnings of this inverter and what it offers?? Thanks
Great video. I have a 4 six volt battery system with a GoPower 3000 inverter. I’ve bought all the Victron stuff including the 2x120 multiplus. Even tho I will be installing in our Class A - your diagram is spot on for me. Question - I bought the Lynx distributor (and also have buss bars). Do you regret not getting the Lynx? Or did you not think it was needed? Got me wondering if I should even use it.
great video! Im unable to install solar panels in my location because of residencial restrictions. I have 2 questions: 1) My location average temperature is around 85°F, will I never see 3000 watts of continues output power?, 2) Can I program the multiplus-ii like a UPS? The idea is to program the inverter in AES mode, trying to reduce the standby consumption and only activate or invert when there's an outage. thxs
Thank you for your research and insight. Question, I’m building a Skoolie from scratch, can I omit the transfer switch for generator and use shore power connection for shore power or generator? Next, how could I also access the alternator on bus engine to charge batteries too? Ric
Thank you Jared! Can I shift gears to your 120V wiring. I think I heard you are using flex cable from the surge protector to the Multi-plus2. However I think I followed you to use 6 gauge THHN wires in pvc conduit fro the out feed from the inverter to the panel due to temperature. Not sure I understand why? You talked about high amperage 120v source. I have an external 30amp inverter as an alternate source. Anyways -- hope you can help me understand the neutral carrying the high current - hence the need for THHN wiring. Sorry but this is important to me as this fall I will likely follow you on this install in a Grand Design 303RLS that we just bought a year ago.
Do I still need to install a T fuse if I'm using a Lynx distributor? Also my RV already a small inverter installed to only run our refrigerator, how can I keep that installed and still use my new Victron? Thanks for all of your videos, I've learned a lot!
I have your "old" setup with the switch and the MultiPlus. But looking forward to the MultiPlus II 2x120 getting here to remove the switch! Been backordered for a bit now. I'd love to see how you setup your tow vehicle charging. I've been contemplating adding that as well.
Watched this video like 5 times and probably will watch many more. I was looking at upgrading my 5yo charging system on my 2017 Thor Outlaw 38RE to add LiFePo4 batteries and solar. I think this is my future setup. Placed my order for most of the larger parts yesterday and am now on a waitlist for the Victron MultiPlus II 2x 120V (expected by end of June). Now trying to mentally retrofit this system into my existing using wire schematics and order the incidentals. Fun times. How about a follow-up video Jared? I'm curious what you have tied into the Cerbo GX. Thanks and keep the content coming!!!
Hi Jared!👊🏼 I absolutely Love your instructional videos and hope you don’t mind me copying what you’ve done! We just upgraded to the 2021 GD 303RLS so I think everything should mate up quite nicely. BTW, is there a particular reason you use the Li-ON Batteries🤔? Truly hope to run into ya one of these days just to say thank you in person, you’ve shown us a lot and I’m grateful! Best wishes
Thank you! I hope the diagram helps. The Lion Energy batteries have been very impressive and performed well. We originally switched to them partially because of size and output. We have not regretted switching to a Lithium Iron Phosphate (LiFePO4) battery.
@@AllAboutRVsLion Energy Batteries are available from Costco for 699.00 a piece perform just as well as BB. We have four. However I am looking at KiloVault CHLX 3600W and built in battery warmer. Cheaper than 4 Lion Energy 1300UT Safari Batteries
So the power assist function will automatically boost the amperage when needed, which is very cool, but what happens when the shore power voltage drops below the safe range? Will this inverter/charger protect the RV from a low voltage situation or would I also need to have a Hughes Auto-Former for this very common problem?
I need help determining mega fuse size for the lynx distributor if you dont mind. I have the following in my current system for a 50Amp Fifth wheel 3-260AH LiTime batteries 6-170 Watt Panels 150/85 victron controller 500A Victron Smart Shunt 3000W Giandel inverter I will be adding the following lynx distributor lynx shunt victron 2-120V inverter charger / removing 3000W inverter victron xs50a Cerbo GX
Great video! I’m about to pull the trigger on Victron equipment and I’m curious since I have a Onan on my coach would it be beneficial to go with the Quattro 2 since it has dual AC inputs or use a Multiplus 2 and continue utilizing the factory transfer switch in the coach
Kind of a long question so if you can be patient please. A question that may or may not be unusual, I've watched yours and several videos on the 2/120 inverter. I ordered and received one in August, but have yet to install it. The reason is this. My 50 amp 2006 Winnebago came factory with a 2000 watt dimensions inverter. The main distribution panel has of course the 2 50 amp breakers, but also a 30 amp breaker labeled "Inverter" Then it has a sub panel that also has a 30 amp breaker labeled sub-main and several 15 amp breakers marked Refrigerator, microwave, receptacle 1 receptacle 2 receptacle 3. Prior to the failure of my old inverter, I never paid much attention but realized that only those items in the sub-main could be run with the inverter. I assumed, (apparently incorrectly) that the 30 amp breaker in the main panel just supplied power to the old charger/inverter and the 30 amp sub fed all the items I listed above. As the new Victron 2/120 appeared a little complicated, and I was short on time to head off for the winter, I just grabbed a Renogy 2000 watt inverter that wired directly into the 120 in and 120 out and of course the 12v from the failed inverter. What I subsequently found out, it appears that all the power from the 30 amp breaker in the main panel, goes out, and comes back to the 30 amp breaker in the sub panel through the inverter/charger. I say this, because even on a 50 amp shore power, if I turn the inverter/charger off all those items I listed in the subpanel do not work. In fact even with it on, if I have been off shore power for a few days, and the batteries are somewhat discharged, (not dead by any means but maybe 70%) the charge portion goes into a heavy load, and if I try to run the microwave it trips the inverter/charger and all the sub panel goes dead. After the batteries are charged, and the charge rate is back down then I can run the other devices. (the charger will put a maximum 65 amp battery charge so that's a lot of watts just being used to charge) So here' the question. I understand both legs or the 50 amp shore power go directly through the new Victron, but what do I do about the 120 input/output for the old inverter/charger that feeds from the main back to the subpanel? Should I just tie them together now that I have both legs going through the new Victron? Would it be safe to just put a junction box in the electrical bay and tie them together since currently the go through the Renogy inverter/charge? Also the Victron has a second source of output at 120 above the main 120 connections, that I understand is inverter power only out, if you want to set it up so when on inverter only just certain circuits are powered. Am I dreaming that I can wire this with both legs going through the inverter/charger and also having a connection so when I am on inverter only just the subpanel runs? Getting this set up working will be great as I spend all winter on 30 amp, and the ability to run more than 30 amp for a period of time, (daytime) and having the batteries recharge at night would solve a lot of power management problems. Any insight you can give or steer me towards someone who can would be appreciated. PS: Your videos are great. You don't talk a bunch of BS and make a 12-15 minute video last 1/2 hour. Keep it up. Thanks in advance.
Jared, thanks for such a great video and resource for us. I’m getting ready to make the jump to lithium batteries and this Multiplus II inverter/charger. Question: does this unit have a built in transfer switch when going from shore/generator power to inverter? Is there a necessity to physically flip a switch of any kind? I need an automatic system to lessen the human error factor. Thanks again for your wonderful explanation and video.
As I type this we are currently at a campground that only provides 30A service and the weather is hot! We have tripped the service breaker twice just running one AC, I have just answered my question of when would I need a set up like this!
Dude, are you psychic or something? We just got a Jayco White Hawk 29BH which has a 50-amp system and you have just described my ultimate power system. Your content and presentation are great and I am an avid consumer of your videos. This one (as well as many others) I've watched a few times now. In part because it is oh so relevant to where I want to get with my Jayco. But, where do I start? I can't afford a big bang approach. I need to spread out my cash flow and build out this configuration over time. Can you do a video as a corollary to this one that lays out a logical sequence of steps to a build-out over time? Here is what I'm starting with: 1) a go Power 190-watt solar panel roof-mounted; 2) a Go Power GP-PWM-30-UL Bluetooth solar controller mounted in the bedroom; 3) I have upgraded the AGM 88 Ah Marine batter to a 100 Ah Lithium; and 4) a Progressive Dynamics PD4560 power converter on which I've moved the mode switch to LI. This Jayco does not come with an inverter. My current upgrade plan is 1) expand the battery bank to 200 Ah in a box on the tongue; 2) install a hardwired EMS; 3) add the Victron 500 amp SmartShunt; 4) add the MultiPlus II and 400 amp T fuse; 5) add 2 x 190-watt solar panels; 6) upgrade the PWM solar controller to MPPT, and 7) increase battery bank further to between 300 and 400 Ah (perhaps moving it inside the front storage area). If lucky, I'll complete all these steps by end of 2022. But it might take me well into 2023. Is this plan reasonable or short-sighted? I suspect many of your subscribers would love to see you outline an upgrade path, and if you want to critique my plan I promise I can stand the embarrassment as long as I learn from it.
So on this build did you basically just ignore everything wiring related on the RV that was existing except for the rv breaker panel? It looks like you even took the existing power input and rewired it to go to the multiplus? And run new wires to the breaker panel? Did you leave existing point of load wiring and plugs inside? I just bought a toy hauler and planning my build out so I'm trying to get an idea of what I need to keep, rewire, or replace.
I just added the Victron Multiplus II 2x120. I was informed to unplug the converter from the Rig house panel to prevent it from charging the batteries as the Victron will now do that. When I unplugged the Converter and turned off the battery disconnect next to the panel in the rig I lost all 12 Volt power. I switched the battery disconnect back on and still no 12 Volt power. I tested everything and found all voltages correct except for the 12 Volt Voltage entering the Main panel that was at "0". . When I plugged the converter back in I did get back the 12 Volts in the Rig house panel. Any suggestion?
Thank you for your videos. Is there a unit that is compatible with 48v? This setup would be perfect for me if the SPS from your previous video was still available (or something like it). then the Victron Multiplus-II 48|3000|35. Or is there aa different option for 48v systems to be provide the same functionality?
Jared - from the front bay view, it does not look like you reinforced the support wall for the Multiplus2. I presume you likely reinforced the other side? Can you share what you used to ensure the wall can carry the weight of the Multiplus2?
Such an in depth walkthrough, so much to unpack! I’ve watched this scores of times and studied the wiring diagram, but still have a few questions. I understand you run the AC wires from the MP II to the breaker panel through PVC conduit. Should I use the same 6 gauge THHN wire from my Automatic Transfer Switch to the MP II, and should I also use conduit for that run as well? If so, can I use the same conduit to run both sets of wire? (My ATC & breaker panel are close to each other, but a long run from the MP II). I don’t yet have a solar system, but plan to add it in the future. Is there any reason I shouldn’t use the buss bars now when wiring my system to connect just the battery bank, MP II, ATC, and breaker panel? (don’t plan on incorporating a DC to DC charger) My thought is that this will simplify a future solar integration. Thanks so much for all you do!
I have similar questions. Look at the video again and at 1:17 you can see the conduit for both runs into and out of the inverter. Also at this point it looks to me that the THHN wiring is different gauges. The green ground looks thinnest (10ga?). Black and red hot wires look about the same (8 ga?) and the white neutral looks to be the largest (6 ga?). Using THHN allows you to do this where you can’t with Romex. THHN wires have higher amperage ratings than their Romex equivalents. And it makes sense, as more current (from both hot legs)will return through that white neutral wire.
Elegant video and diagrams. Did you consider one of the all in one solar charge controller,inverter like Growatt SPF 3000w 120v/240v Solar Inverter? I am considering the advantages and disadvantages of 24 volts.
Hi Jared. Thanks for your content. I have a 50amp travel trailer. If I'm plugging into a 30amp generator, do I need the SPS or transfer switch? Thank you.
Thank you! I have been looking for a wiring diagram and now I found yours! I have a question. Will the 6 lithium batteries work with your wiring diagram? Also, I would like to have more solar panels like 1200 to 1800 watts therefore I believed that I need something like MPPT 150V 70 amp instead of MPPT 100V 50 amp Solar Charge Controller? Thanks!!!
I know this is an old video but I hope you still see it and can help me. I’m adding a multiplus 2 to my camper but we may go with a 50 amp camper later and I’ll want to undo the work I’ve done and move it all over. Is it possible to run the 2 x 120 in a single configuration so it can be used later in 2x mode?
I have a 50 amp RV. I have the 30 pigtail and the RV runs fine on 30 amps. I'm getting a new inverter 3k or larger, I'd like to just plug in my shore line (30amp) into my inverter. If I have a 3K inverter with a 30 amp receptacle, can I plug the RV into it and run on solar power without hurting the RV? or would I need to add a pass through to the mix? It seems to me, that it adds up, but I'm not electrically certified. I know a little, but I always check to make sure. These are great video's but is there one that directly addresses this issue? I haven't seen one yet.
Nice installation job. Apart from the electrical side did You fabricate things like the battery tray or where did You get it. I am doing an install on a class A and find mounting heavy components is trickier than the wiring up of things.
Am I the only one who has to watch these videos 4 or 5 times and still picks something new up every time? Great video!
Lol. Definitely not alone!
I am with you on this one
Me toooo!!! Gooood solid info!!!👍😃🍻
Nope! Lol
probably a dozen times by now...
The walk through of the wiring diagram may have been the best I've seen. Well done guys!
Finally, a video that gives this seriously novice RVer a great overview that takes the intimidation away. Still have much to learn but this gives me a base to build upon.
You are ‘da bomb’!!!!
Instead of one T-fuse I used an MTBF fuse on each positive battery terminal, just a slight edge on safety. I also put an on-off switch on the positive side (after the shunt of course) so anytime I have to work on the positive battery cables there is no ground connection for them to short across a random wrench or dropped screwdriver.
Finishing up the install of our MultiPlus II this week. Very timely video. Thanks for the diagrams.
Hope they help!
I would like to see a video on your dc to dc charge set up / install from the truck.
Heck of a great AND clean job! Love the shelf.
Thanks JD. Love your new RV by the way. It looks great!
@@AllAboutRVs thanks my friend! Work in progress.. lol
Yes
Clean install. Would you consider on your diagram listing the wire sizes between each thing.
Thanks for the update Jared.. Glad to hear it's all good 👍. I've had one on back order. Looking forward to getting it.
Nice! I think it will be a great addition to your setup.
@@AllAboutRVs Actually ours rig is 30A, so this would be for a different project on a 50A coach.
I'm an electrical engineer, and I'm impressed with the level of design detail in this. I would recommend some better lugs for the high current cables, with more metal and surface area to connect to the batteries. This implementation is forcing a lot of electrons through some (IMO) undersized cable lugs, which can get hotter than they should. Nice job, especially on the fusing and disconnects.
I am not an electrical engineer and I got lost almost from the beginning.
You do SUCH a great job of educating us and explaining the what and why - keep it up! Thanks!!
This is the second time I’ve watch this video because I figured out a way to get the multiplus II to fit in my compartment. Going from the original multiplus Will make everything operate so much better. Thank you very much for the video Jared.
Thank you! thank you! thank you! Brother, I cannot thank you enough. Your videos, diagrams and knowledge that you have passed on, has taken the fear out of doing this setup. My father and I were able to put together pretty much the same system you showed above...including the install of the cerbo gx. Took us 2 days to assemble, one day to sort everything out and install and we went active on day 3. Following your diagrams and videos allowed us to have a trouble free and very successful install and first flip of the power over to batteries to run our rig! We have been on battery power now for 48 hours and it is awesome! Our whole 50amp rig now runs off batteries!!! Thank you Jared!!
Hi...considering doing the same. Confirming you have 50a power powering both sides of you breaker box...just as if you were on shore power...? Thx!!!
Great video Jared! installed our MPII a month ago. Just finished a trip to 30 amp spot and it worked great. Ran both a/c units. batteries never got below 80%.
How much battery capacity do
You have?
@@ChadLower 400 ah
@@oldguysrule5895 very nice. How long we’re you able to run both ac’s?
Why would your batteries wear down if you were plugged into 110v/30amp AC shoreline connection?
@@mountaingrownnomad4212 Air conditioners draw more than 30 amps so the MPII makes up the difference from batteries - and not always sunny enough for solar to keep up at the same time (which is why battery bank sizing is so important)
Jared- another great review! Thank you for taking the time to share your techniques and processes! Your'e one of the channels that I follow and take a lot of advice from! I appreciate everything you and your family does for the RV community! Stay safe out there! Cheers!
your vids are GREAT!!
Ive been ready to install an inverter for the past year and a half, but ive not been able to get the information ive needed....til now. thank you...
its nice to have the parts list to work from when trying to choose parts, but there is way more parts (options) listed than is shown in the video.... it would be so helpful if the parts shown in the vid were separate from the optional parts... OR, mark them as optional....
I watched your previous video using the SPS unit, only to find out the SPS unit is no longer made, which brought me here... and now, as im trying to make a "to purchase" list, I find myself confused as to which of the parts on that list is needed for a complete install of a victron inverter/charger on a motorhome.... I want to run 1 AC unit, and still have power to operate the microwave for a short period... the MH has 30a shore power, and an 800amp battery bank.... thanks for any additional help that you can offer.
Great point. I am going to work on a parts list video next, good idea.
We also use a Micro-Air Easy Start on our Air conditioner, which is 13,500 BTU. We're looking at buying a Victron MultiPlus 3000 watt to power it. We were worried we might need to scale up to something that's 5000 watt or higher. Glad to hear it's working for you guys!
Works great for me, too.
Jared - your wiring diagrams and videos are awesome and very much appreciated ....just hit the switch on my 300 amp hour battery bank / Multiplus 3000 and Victron dc to dc charger and it is awesome. First evening on the road arrived in a thunderstorm and just ran the ac on batteries only to wait out the storm .....thanks again for taking the time to share so much!
I also have a Multiplus 11 48volt 3000watt
In Australia 🇦🇺 and love it I can run my 240 volt hot water and Air fryer and electric kettle and induction cooktop with no issues
But obviously not at the same time
Great Job and it was really a pleasure meeting you and your wife.... Hope we run into each other again in the future.
Great Review Jared! Just want to make sure I fully understand your setup. Tell me if I've got my couple of points right. 1) Your switch marked RV Load Disconnect cuts power from the MPPT to the Batteries. 2) Your Bus Bars are used for 12V supply to your 12V Breaker panel section and your Tow Vehicle Charging from either the MPPT or Battery as situation permits, if MPPT has higher voltage than Battery, it will charge batteries and feed 12V Fusebox. (Sorry not sure if MPPT is powered from Solar only or 12V battery or Both as available.) Thanks for all your hard work!
This inverter fits my needs perfectly, thank you for sharing. And I'd be interested in all the bells and whistles that you may add (like you mentioned in your previous video). Great job on the install, it's very clean.
Nice job...the diagram helps tremendously as you are explaining. I watched it a second time with the diagram in my hand.
Thanks!
This was awesome! Do you have another video that shows how you run the inverter power to the panel? You show the conduit, did you remove the underskirt and then run the conduit from the basement to the distribution panel?
You Rock!!!! Thanks so much for the Diagram! Now if the multi 2 will come available I can finally order it! But again thank you so much for making the video!
I've had the Victron MultiPlus 3000 for 3 years with 4 BB batteries and 600 watt of Solar. My rv is a 30 amp rv and 3000 watt Onan QD. We love the system.
Please continue to provide more videos on testing and smart adaptations around the MultiPlus II. I am moving in this direction myself, also using newer Victron tech, tho at a slower pace. Thanks for being there for us.
Beilliant, professional, top marks. There's a lot of videos out there on solar, inverters etc., but this is the best I've seen. So good, i would like to copy that. Subscribed!!!
Your schematics are great. It makes total sense of it. Thank you!
Thank you very much for explaining who this model is for. Looks like I only need the original multiplus for my van build.
Yes great choice MultiPlus I will serve you well in a van build
Great video and explanation. Picking up our new to us coach next month and then seriously move forward w/ a solar setup. I'll keep watching!
Great video Jared. I installed this new inverter last month and it has been working flawlessly. Love it! Glad to hear you prefer it over the old Multiplus and SPS.
Congratulations on getting one! Glad to hear it’s working for you. I saw on the forums they are working on an update to display line one and line 2 info properly. I’m assuming that will work for Bluetooth and for the Cerbo GX. It’s one thing I love about Victron is they continually innovate and update.
@@AllAboutRVs Yes, I saw that as well. Victron seems to be very attentive to their customer's needs. It sounds like the firmware update is still a few months away but I'm just glad they are doing it! I love all your videos Jared. You have a very calm demeanor and do a great job explaining things concisely. Well done!
$30 for this and diagrams and $30 for the other video on calculate solar thanks for the info!!!
Great presentation Jared. Thank you times ten. * I did notice that a few of your links to components go to the wrong component (3/12/2022).
Thanks I’ll check the links
Thank you! For all the great information in videos. Easy to understand and great resource links. 😎😎
This is way awesome. Now I have to get one and figure out how to wire it (run the 50 amp shore from the back to the front pass through, and back to the middle where the breaker panel is.
Great video, very helpful. I didn't see listed what size fuse you used coming off the battery and going to the DC busbar. Thanks.
Excellent Job Jared! Truly excellent. Your Installation and your visual schematics are spot on to how I would design and install equipment back in the day at KPNX Ch 12. Wish I was there to help you with that project! It must have been an overall fun, but challenging install. But now that you have completed it- No Regrets only pure satisfaction.
Great video!, I just installed my Multi Plus 2 with 4 - 100 ah battel born batteries, thanks for the diagram!
Glad it helped!
I have one on back order, This video is just what I needed.
Thats an ultimate build. So cool
I am always looking forward to your videos. I don’t have a fifth wheeler but the info still the same. Thanks
Great video, missed the boat. Lion energy use to be 799.00 when they first came out. Now it's 999.00. at least we can get 10% off. Thanks Jared
If you're handy you can get 280Ah of Lischen or Eve LiFePO4 cell shipped from China for ~$500 and add a $100 Daly BMS and have nearly as much capacity as 3x those for less =)
@@andrewfidel2220 I will try that way, ty
Looking at the video installation it looks like you have upgraded your mppt controller but not reflected on the diagram? Nice, clean install !!
Awesome video ! That's EXACTLY what I need ! I do have a generator, so this will be perfect ! Thank you!
Great Vid! Thank you. So, I see you've switched to the Smart Shunt and no longer have the BlueTooth Battery monitor/display. Is this because these two pieces of equipment are redundant?
Great review! I was looking forward to the MultiPlus 3000 with manual switches now I'm' inline to get the Multiplus 3000 II. Thanks
Great stuff Jared! I'm just waiting on delivery of my Multiplus II! (I've got a Multiplus if anyone wants it - new in the box and never installed)....
I’d actually take you up on that. How can I arrange buying from you?
@@strongholdhealth Sorry - sold it already to a full timer who needed a second unit!
Novice here, but can I still have a Generator following the schematic as shown? Otherwise, thanks for the lessons, you have made a difference in the life of my wife (Hospital Nurse, I'm sure there are more too) in theses troubled times and how I can help divert her attention away from the yuk and to an enjoyable time away from it all! Ty.
As always, great video. I would love to see a "shopping list" for things in the diagram. I would like to do the same install for my 50 amp GD, and build in stages.
Thanks, I’ll have to work on putting one together.
@@AllAboutRVs Yes, great video and diagrams. However I am also building this set-up in stages. I am Solar prepped and have an onboard gen and have the same three Lion batteries and Victron Multiplus II on order. Can you post a diagram and shopping list sans the solar?
I've been using your diagram for my Multiplus ll install with all the same basic components for the exception that I'm using a Linx Distributor instead of the Bus Bars and separate fuses for the solar controller and dc to dc charger that will feed into the Linx Distributor as well as the smart shunt....I would love to see wiring diagram that included a Linx Distributor.
Thanks for the great video!! Question and sorry if you answered this already.
1. You talked about the orientation of the inverter as vertical. Can you mount horizontally?
2. My rig is “inverter ready” with wiring ready. Question is that I have labeled “inverted outlet” plugs in my rig… if I wire the inverter with the “inverter ready” wiring. Will it only power those inverted outlets?
3. If so, if I want to power the entire rig I should run new wiring from inverter directly to the rig panel correct?
Thanks for your time and hope to meet up on the road somewhere.
Exactly what I’m thinking of doing!
Nice work!... BTW, on your diagram:
You may consider connecting the "RV Load Disconnect and Fuse" on the "load" side of the (+) Busbar.
That way the MPPT can still charge the Batteries if/when you decide to disconnect the "DC loads".
Also, have you considered a "Victron Lynx Distributor"? (it makes for a real clean look)
I have purchased the Victron distributor and have a similar model GD RV. I am planning this system in my RV.. I’ve built a backer board and the made shelf brackets and am starting to lay out the parts. I’m going with a larger 150/100 mppt and space is starting to become an issue….the distributor and the 150/100 charge controller add a considerable footprint to what Jared shows here.
Great job, I have one of these on order and will be using your diagram as a reference when I install.
Hey Jared. Hope you're doing well. We have a 2023 Grand Design Reflection Travel Trailer and an Onan 30A portable inverter generator. I am getting ready to install a Victron MultiPlus II Inverter. Since I'll only be using the generator with my power cord, when I am not on shore power, is there any need for an ATS? BTW, your videos were a HUGE help when I installed my two Battleborn GC3 batteries...thank you! The inverter is the next step!
Hey Jared, love the video. Would you be able to put up the design of your battery box on this link. I really like to cleanliness of those lion batteries together. Thanks
Incredible power management setup. Love the clear explanation and masterful diagram. Where’s the best place for me to find more information on DC to DC battery chargers?
Thank you. I will be doing a dedicated video on it.
Jared have you done a video of how you mounted the bracket that holds the batteries? I love this set up and want to mimic it in our rig as we have the same GD Refelection but we are a 303rls (which is the same front compartment). Would really appreciate a step by step to do that. Thanks in advance and we love your videos!!!
@AllAboutRVs - Yes - would also like your supplier for the shelf hardware (& ideally the entire parts list for your install - as requested above).
*** You gave some really good info I’m looking for. BUT- to be clear, in power share mode it only shares or boosts 120 volts on both legs if connected to 30 amp or 15 amp mode and the inverter only does 120v?? What happens if you turn the 220v A/C on?? I’m not really understanding that part of it. I really want to know more on the power sharing feature since I have a 50 amp trailer with 3 /c units on the roof. Can you make a video solely on this feature and the warnings of this inverter and what it offers?? Thanks
Great video. I have a 4 six volt battery system with a GoPower 3000 inverter.
I’ve bought all the Victron stuff including the 2x120 multiplus.
Even tho I will be installing in our Class A - your diagram is spot on for me.
Question - I bought the Lynx distributor (and also have buss bars). Do you regret not getting the Lynx? Or did you not think it was needed?
Got me wondering if I should even use it.
Can you do a video of two of these Multipluses in parallel config, specifically the wiring?
I used your wiring diagram , that went well, but I can’t get any dc power . Multi plus 2
Look at a raspberry pie running the Venus OS, much cheaper option over a GX. I love mine and it was like $60 vs $300-$500.
great video! Im unable to install solar panels in my location because of residencial restrictions. I have 2 questions: 1) My location average temperature is around 85°F, will I never see 3000 watts of continues output power?, 2) Can I program the multiplus-ii like a UPS? The idea is to program the inverter in AES mode, trying to reduce the standby consumption and only activate or invert when there's an outage. thxs
Very impressive Jared!
Do you have any more videos on how you wired it to the panel and 50 amp side and ran the Conduit?
Thank you for your research and insight.
Question, I’m building a Skoolie from scratch, can I omit the transfer switch for generator and use shore power connection for shore power or generator?
Next, how could I also access the alternator on bus engine to charge batteries too?
Ric
Thank you Jared! Can I shift gears to your 120V wiring. I think I heard you are using flex cable from the surge protector to the Multi-plus2. However I think I followed you to use 6 gauge THHN wires in pvc conduit fro the out feed from the inverter to the panel due to temperature. Not sure I understand why? You talked about high amperage 120v source. I have an external 30amp inverter as an alternate source. Anyways -- hope you can help me understand the neutral carrying the high current - hence the need for THHN wiring. Sorry but this is important to me as this fall I will likely follow you on this install in a Grand Design 303RLS that we just bought a year ago.
Thanks so much for this video, diagram ect. this really helps me understand how al this goes together.
Do I still need to install a T fuse if I'm using a Lynx distributor? Also my RV already a small inverter installed to only run our refrigerator, how can I keep that installed and still use my new Victron? Thanks for all of your videos, I've learned a lot!
Maybe I missed it in one of your videos, but where did you find those battery trays?
I have your "old" setup with the switch and the MultiPlus. But looking forward to the MultiPlus II 2x120 getting here to remove the switch! Been backordered for a bit now. I'd love to see how you setup your tow vehicle charging. I've been contemplating adding that as well.
Jared to Jared question ⁉️
@@d.pollard5962 ALL THE JAREDS!
Watched this video like 5 times and probably will watch many more. I was looking at upgrading my 5yo charging system on my 2017 Thor Outlaw 38RE to add LiFePo4 batteries and solar. I think this is my future setup. Placed my order for most of the larger parts yesterday and am now on a waitlist for the Victron MultiPlus II 2x 120V (expected by end of June). Now trying to mentally retrofit this system into my existing using wire schematics and order the incidentals. Fun times. How about a follow-up video Jared? I'm curious what you have tied into the Cerbo GX. Thanks and keep the content coming!!!
Hi Jared!👊🏼 I absolutely Love your instructional videos and hope you don’t mind me copying what you’ve done! We just upgraded to the 2021 GD 303RLS so I think everything should mate up quite nicely. BTW, is there a particular reason you use the Li-ON Batteries🤔? Truly hope to run into ya one of these days just to say thank you in person, you’ve shown us a lot and I’m grateful! Best wishes
Thank you! I hope the diagram helps. The Lion Energy batteries have been very impressive and performed well. We originally switched to them partially because of size and output. We have not regretted switching to a Lithium Iron Phosphate (LiFePO4) battery.
@@AllAboutRVsLion Energy Batteries are available from Costco for 699.00 a piece perform just as well as BB. We have four. However I am looking at KiloVault CHLX 3600W and built in battery warmer. Cheaper than 4 Lion Energy 1300UT Safari Batteries
@@gregoryhenriksen957 Thank you for that info...I’ll research them as well.
Great Video. Does anybody know where I can find a video showing how the inverter is wired to the panel?
So the power assist function will automatically boost the amperage when needed, which is very cool, but what happens when the shore power voltage drops below the safe range? Will this inverter/charger protect the RV from a low voltage situation or would I also need to have a Hughes Auto-Former for this very common problem?
I need help determining mega fuse size for the lynx distributor if you dont mind.
I have the following in my current system for a 50Amp Fifth wheel
3-260AH LiTime batteries
6-170 Watt Panels
150/85 victron controller
500A Victron Smart Shunt
3000W Giandel inverter
I will be adding the following
lynx distributor
lynx shunt
victron 2-120V inverter charger / removing 3000W inverter
victron xs50a
Cerbo GX
Great inverter class Jared! Thank you!
Thank you!
Great video! I’m about to pull the trigger on Victron equipment and I’m curious since I have a Onan on my coach would it be beneficial to go with the Quattro 2 since it has dual AC inputs or use a Multiplus 2 and continue utilizing the factory transfer switch in the coach
Kind of a long question so if you can be patient please. A question that may or may not be unusual, I've watched yours and several videos on the 2/120 inverter. I ordered and received one in August, but have yet to install it. The reason is this. My 50 amp 2006 Winnebago came factory with a 2000 watt dimensions inverter. The main distribution panel has of course the 2 50 amp breakers, but also a 30 amp breaker labeled "Inverter" Then it has a sub panel that also has a 30 amp breaker labeled sub-main and several 15 amp breakers marked Refrigerator, microwave, receptacle 1 receptacle 2 receptacle 3. Prior to the failure of my old inverter, I never paid much attention but realized that only those items in the sub-main could be run with the inverter. I assumed, (apparently incorrectly) that the 30 amp breaker in the main panel just supplied power to the old charger/inverter and the 30 amp sub fed all the items I listed above. As the new Victron 2/120 appeared a little complicated, and I was short on time to head off for the winter, I just grabbed a Renogy 2000 watt inverter that wired directly into the 120 in and 120 out and of course the 12v from the failed inverter. What I subsequently found out, it appears that all the power from the 30 amp breaker in the main panel, goes out, and comes back to the 30 amp breaker in the sub panel through the inverter/charger. I say this, because even on a 50 amp shore power, if I turn the inverter/charger off all those items I listed in the subpanel do not work. In fact even with it on, if I have been off shore power for a few days, and the batteries are somewhat discharged, (not dead by any means but maybe 70%) the charge portion goes into a heavy load, and if I try to run the microwave it trips the inverter/charger and all the sub panel goes dead. After the batteries are charged, and the charge rate is back down then I can run the other devices. (the charger will put a maximum 65 amp battery charge so that's a lot of watts just being used to charge) So here' the question. I understand both legs or the 50 amp shore power go directly through the new Victron, but what do I do about the 120 input/output for the old inverter/charger that feeds from the main back to the subpanel? Should I just tie them together now that I have both legs going through the new Victron? Would it be safe to just put a junction box in the electrical bay and tie them together since currently the go through the Renogy inverter/charge? Also the Victron has a second source of output at 120 above the main 120 connections, that I understand is inverter power only out, if you want to set it up so when on inverter only just certain circuits are powered. Am I dreaming that I can wire this with both legs going through the inverter/charger and also having a connection so when I am on inverter only just the subpanel runs? Getting this set up working will be great as I spend all winter on 30 amp, and the ability to run more than 30 amp for a period of time, (daytime) and having the batteries recharge at night would solve a lot of power management problems. Any insight you can give or steer me towards someone who can would be appreciated. PS: Your videos are great. You don't talk a bunch of BS and make a 12-15 minute video last 1/2 hour. Keep it up. Thanks in advance.
That is an impressive and super clean installation. 👍
Jared, thanks for such a great video and resource for us. I’m getting ready to make the jump to lithium batteries and this Multiplus II inverter/charger. Question: does this unit have a built in transfer switch when going from shore/generator power to inverter? Is there a necessity to physically flip a switch of any kind? I need an automatic system to lessen the human error factor. Thanks again for your wonderful explanation and video.
As I type this we are currently at a campground that only provides 30A service and the weather is hot! We have tripped the service breaker twice just running one AC, I have just answered my question of when would I need a set up like this!
You should also mention that the Magnum MSH3012 RV has the same dual in dual out and smart phase
Dude, are you psychic or something? We just got a Jayco White Hawk 29BH which has a 50-amp system and you have just described my ultimate power system. Your content and presentation are great and I am an avid consumer of your videos. This one (as well as many others) I've watched a few times now. In part because it is oh so relevant to where I want to get with my Jayco. But, where do I start? I can't afford a big bang approach. I need to spread out my cash flow and build out this configuration over time. Can you do a video as a corollary to this one that lays out a logical sequence of steps to a build-out over time? Here is what I'm starting with: 1) a go Power 190-watt solar panel roof-mounted; 2) a Go Power GP-PWM-30-UL Bluetooth solar controller mounted in the bedroom; 3) I have upgraded the AGM 88 Ah Marine batter to a 100 Ah Lithium; and 4) a Progressive Dynamics PD4560 power converter on which I've moved the mode switch to LI. This Jayco does not come with an inverter. My current upgrade plan is 1) expand the battery bank to 200 Ah in a box on the tongue; 2) install a hardwired EMS; 3) add the Victron 500 amp SmartShunt; 4) add the MultiPlus II and 400 amp T fuse; 5) add 2 x 190-watt solar panels; 6) upgrade the PWM solar controller to MPPT, and 7) increase battery bank further to between 300 and 400 Ah (perhaps moving it inside the front storage area). If lucky, I'll complete all these steps by end of 2022. But it might take me well into 2023. Is this plan reasonable or short-sighted? I suspect many of your subscribers would love to see you outline an upgrade path, and if you want to critique my plan I promise I can stand the embarrassment as long as I learn from it.
So on this build did you basically just ignore everything wiring related on the RV that was existing except for the rv breaker panel? It looks like you even took the existing power input and rewired it to go to the multiplus? And run new wires to the breaker panel? Did you leave existing point of load wiring and plugs inside? I just bought a toy hauler and planning my build out so I'm trying to get an idea of what I need to keep, rewire, or replace.
I just added the Victron Multiplus II 2x120. I was informed to unplug the converter from the Rig house panel to prevent it from charging the batteries as the Victron will now do that. When I unplugged the Converter and turned off the battery disconnect next to the panel in the rig I lost all 12 Volt power. I switched the battery disconnect back on and still no 12 Volt power. I tested everything and found all voltages correct except for the 12 Volt Voltage entering the Main panel that was at "0". . When I plugged the converter back in I did get back the 12 Volts in the Rig house panel. Any suggestion?
Thank you for your videos. Is there a unit that is compatible with 48v? This setup would be perfect for me if the SPS from your previous video was still available (or something like it). then the Victron Multiplus-II 48|3000|35. Or is there aa different option for 48v systems to be provide the same functionality?
Jared - from the front bay view, it does not look like you reinforced the support wall for the Multiplus2. I presume you likely reinforced the other side? Can you share what you used to ensure the wall can carry the weight of the Multiplus2?
Such an in depth walkthrough, so much to unpack! I’ve watched this scores of times and studied the wiring diagram, but still have a few questions.
I understand you run the AC wires from the MP II to the breaker panel through PVC conduit. Should I use the same 6 gauge THHN wire from my Automatic Transfer Switch to the MP II, and should I also use conduit for that run as well? If so, can I use the same conduit to run both sets of wire? (My ATC & breaker panel are close to each other, but a long run from the MP II).
I don’t yet have a solar system, but plan to add it in the future. Is there any reason I shouldn’t use the buss bars now when wiring my system to connect just the battery bank, MP II, ATC, and breaker panel? (don’t plan on incorporating a DC to DC charger)
My thought is that this will simplify a future solar integration.
Thanks so much for all you do!
I have similar questions. Look at the video again and at 1:17 you can see the conduit for both runs into and out of the inverter. Also at this point it looks to me that the THHN wiring is different gauges. The green ground looks thinnest (10ga?). Black and red hot wires look about the same (8 ga?) and the white neutral looks to be the largest (6 ga?). Using THHN allows you to do this where you can’t with Romex. THHN wires have higher amperage ratings than their Romex equivalents. And it makes sense, as more current (from both hot legs)will return through that white neutral wire.
Wow this so so much. So I have to rewire the shore power from the beaker box to the inverter?
Elegant video and diagrams. Did you consider one of the all in one solar charge controller,inverter like Growatt SPF 3000w 120v/240v Solar Inverter? I am considering the advantages and disadvantages of 24 volts.
Hi Jared. Thanks for your content. I have a 50amp travel trailer. If I'm plugging into a 30amp generator, do I need the SPS or transfer switch?
Thank you.
Thank you! I have been looking for a wiring diagram and now I found yours! I have a question. Will the 6 lithium batteries work with your wiring diagram? Also, I would like to have more solar panels like 1200 to 1800 watts therefore I believed that I need something like MPPT 150V 70 amp instead of MPPT 100V 50 amp Solar Charge Controller? Thanks!!!
I know this is an old video but I hope you still see it and can help me. I’m adding a multiplus 2 to my camper but we may go with a 50 amp camper later and I’ll want to undo the work I’ve done and move it all over. Is it possible to run the 2 x 120 in a single configuration so it can be used later in 2x mode?
I have a 50 amp RV. I have the 30 pigtail and the RV runs fine on 30 amps. I'm getting a new inverter 3k or larger, I'd like to just plug in my shore line (30amp) into my inverter. If I have a 3K inverter with a 30 amp receptacle, can I plug the RV into it and run on solar power without hurting the RV? or would I need to add a pass through to the mix? It seems to me, that it adds up, but I'm not electrically certified. I know a little, but I always check to make sure.
These are great video's but is there one that directly addresses this issue? I haven't seen one yet.
Great video as always!
Nice installation job. Apart from the electrical side did You fabricate things like the battery tray or where did You get it. I am doing an install on a class A and find mounting heavy components is trickier than the wiring up of things.