Catastrophic Fuse Installation RV Battery Bank Doh! *Mistake in wiring* See description
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- เผยแพร่เมื่อ 11 ต.ค. 2017
- *NOTE: There is a wiring mistake in the video. The top lug of the fuse block should only have the output cable. The way I wired it only protects 2 of the 4 batteries. I knew better but I had a brain cramp and wired the positive from the other battery wrong it belongs on the bottom of the fuse.* See blog post for proper photo. Sorry, Ray
Updated wiring photo - goo.gl/ebrkyS
See full blog post - www.loveyourrv.com/installed-c...
In this video I install a new catastrophic fuse on my 464 amp hour 4 golf cart RV battery bank. I explain why I wanted this new one versus the old one and why I chose 200 amps.
I chose to use a MRBF terminal fuse from Blue Sea Systems so the fail-safe protection could be as close to the battery terminal as possible.
See blog post and video detailing my boondocking power system - www.loveyourrv.com/diy-rv-boon...
Products Mentioned (Disclaimer: Amazon Affiliate Links)
Older fuse block - amzn.to/2z3Ry91
New Blue Sea Fuse Block - amzn.to/2z3Zx62
Blue Sea 200 amp fuse - amzn.to/2zj7lSl
Ox-Gard Compound - amzn.to/2zlctVY
Visit the Love Your RV! Amazon Favorite RVing Products Page
www.amazon.com/shop/loveyourrv
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Hi Ray. Thanks for the video. I really enjoy all your videos. I have a question about the way you wired the fuse block to your battery bank. You put both the red cable (call it #1), that connects the battery on the right to the battery on the left, on top of the block, and the red cable (#2) that is the positive feed from the battery bank to your rig. Since the #1 cable is part of the battery bank, shouldn't it be on the battery terminal under the terminal block so it protects the whole battery bank. Seems like your bypassing the fuse on part of your battery bank Thanks again.
Holly crap, you are totally right! Major brain cramp! Thanks for catching that.
I saw that also Ray. I am surprised Angie did not bark at ya when she saw it.
It happens, but I think hogcat is right, Angie should have caught that. lol, Hope the run into you someday. Safe travels.
haha, ya that beagle is slacking off. :)
Now you can tell them all Ray that you wired the fuse up that way to see if we were paying attention. I enjoyed it.
Downunda - Melbourne Australia
I have been wondering If I needed a fuse/breaker on my RV battery. This is the first TH-cam video that shows it, Thanks for the good video.
Hi Ray, Yes I'm a big fan of the Blue Sea fuses. I have used them for a while, they are very easy and simple. Great video, Lou
A good safty precaution Ray.
Good video. Have a blast in Europe. Looking forward to more travel videos when you all get back.
I'm not going to Europe but my wife Anne is currently in Scotland for 3 weeks on a photo shooting tour. :)
Thank you Ray!!
Cool, did not know those even existed. Thanks for sharing and the correction too. ;)
Great video! Another few weeks before you start heading South? Looking forward to your adventures!
Mark
Yeah about 3 weeks to go now.
Hey Ray! Another great video. Thanks
You're welcome. Thanks for watching. Cheers!
Can't stop thinking about the mouse in the swirl cage :)
I think Angie has selective hearing. She sure hears you ask if she wants a pig ear! Lol
I think the wicked beagle nose smells the pigs ears coming.
Sir, I love the fuse and I will be getting one soon. However, I think you have one wire in the wrong location. You have 4 6-volt batteries wired in a series-parallel configuration to provide the coach with 12 volts with more amps. The positive wire on the right pair of batteries should be connected to the positive terminal of the left battery and not the upper fused connector. In the current configuration the fuse only protects the left pair of batteries. The right pair would still be connected. Just a minor change. Thanks again.
Sorry Ray, I missed the comment from "RVing here and there" Please disregard. You are still to be commended that you went to the extra effort. AND you helped me with my van!
Hello Ray, Why is the inverter the elected device for the catastrophic fuse calculation for the RV battery bank calculation? Nice work on the catastrophic fuse Blog post. Thank You for all this precious info !!
I think because it is by far the biggest amperage draw on the battery bank.
Makes sense, Merci and good day Ray ☀
There are special Insulated Nuts for these MRBFs in the market. With said Insulated Nut, you wont need this MRBF terminal at all. You simply insert the MRBF on the battery's bolt terminal, then insert the cable terminal lug and finally use the Insulated Nut that insulate the terminal lug from the bolt. Caveat, the bolt should be long though...
Cool, hadn't heard of those before. Thanks
on fuses F50A would be a fast acting, F=Fast, T50A is a slow acting, T=Time delay., no letter means average/normal.
Hey Ray, I relay like your battery box. Where did you pick it up from, I'm looking at adding Battery to my RV as well.
Thank you.
I picked it up at a local marine supply store but I see the same ones online here - www.allbatterysalesandservice.com/browse.cfm/4,5576.html
Awesome Thank you.
thanks for showing always be safer if possible.
Educational video , thank you . I noticed your battery bank consisted of 4 interstate 6 volt batteries, is there a reason that you choose these batteries over others and would you be able to run a Keurig coffee maker with this ?
I picked Interstate because they have many dealers in the USA and Canada, and I travel a lot. So if need be, it would be easy to get a warranty replacement. Shipping 66 lb. batteries could be a pain and expensive. My rationale was better if there is a nearby dealer to physically go to. Also, Interstate batteries are pretty decent. I used them for years and then sold them with good life left when I got lithium instead. As far as the coffee maker goes, 4 golf cart batteries can supply the needed energy, but you'll need a 2000-watt inverter as well to provide the AC wattage.
Hi Ray, Should I put a catastrophic fuse on the installation of my two Lion Energy batteries too? it looks like useful extra protection everyone should have?
I have two positive cables, one that goes left to the inverter under the bed and the other goes right to all the trailer's wiring upfront. So, it would be those two cables at the top of the fuse.
My inverter is a 1000W peak 2000, low voltage 10V .
Your system sure looks well protected. Thank you for your videos. I appreciate and learn so much. It takes me time but I do get things done and having fun 😊.
It's always a good idea to fuse every cable in system in case one of the cables ever touches the trailer frame, but also the Lion batteries do have their own short circuit protection built-in to them. So, not as big a problem like with lead-acid batteries. With the Lion Energy batteries, it's like a double protection.
@@LoveYourRV Thank You 😊. Cheers
Your wiring "mistake" is actually a useful other way of wiring parallel batteries. That is, an MRBF on the other battery's post, then an MRBF on the joining post. That way each battery is fused independently.
Hey Ray ..new fuse link..has old fuse link info...thanks for the video
Do you mean the Amazon links in the description? Seem to work right for me unless I'm missing something.
Thanks for the great video Ray. My wife and I always watch but lately she’s complaining that your channel is just for the guys and not for the woman folk. My wife likes to take pictures while we’re camping so maybe someday you could have your wife do a video on photography or some other subject that maybe geared to the woman who watch your channel.
My wife and i have separate online endeavours, she runs her own blog. - annemckinnell.com/blog/ She's not much for doing videos although she is slowly getting into it doing her own photography video courses on editing stuff. So maybe she'll start making more in the field stuff. You can finds Anne's TH-cam channel here - th-cam.com/users/annemckinnell
My channels content will change as it usually does once we head south for our six month snowbird trip with more travel style videos showing the places we go. Cheers Ray
Love Your RV thanks Ray for taking the time to explain things to us.
Thank you for replying. Yes, I do have a 2000W inverter and am researching a 12v lithium batteries ( 2 for a battery bank ) . Can I ask which lithium batteries you choose ?
I didn't personally choose any, all have been free review samples over the years. Here is a list of lithium relate reviews. www.loveyourrv.com/tag/lithium/
Of all the ones I've reviewed, I like Lion Energy the best as far as USA companies but they are pricier of course. For Chinese based I like the Aolithium brand. But there are many more brands out there so it's hard to say which is ultimately the best out there.
Great video and thanks for the update. Will a 300 amp fuse work for our system (similar to yours except our inverter is 3000 watts)?
Could be but check your inverter manual it is possible you may need a 400 amp fuse for a 3000-watt inverter depending on its surge rating. Many inverters can put out more watts than the continuous wattage rating so have to be fused to accommodate the surge.
Thanks Ray, couldn't find this item in 400 amps. I did find one like your old one (class T I believe). Any preference between it and the ANL type blade fuse?
Not really, I imagine either would do the job well. The biggest concern I'd think is to also make sure the wire gauge is beefy enough when dealing with high amps like that. An undersize wire could still smoke and melt without taking out the high amperage fuse.
Hi Ray, I always wondered why you stayed with a 12 volt battery bank and did not choose to go with 24 volts?
Just easier, since all the RVs circuits are 12 volt and I had a 12 volt inverter already.
Greetings Ray, would it matter if you fused the negative post of the battery bank? I know that your cap is red, but can you get a black one?
I don't think it would matter, I know some cat fuses are on the negative post. I believe I read some OEMs do it that way.
I like to have all my devices on the positive side just to keep things uniform. At least the next owner, if there is one, won't have to guess when they see a breaker or fuse and will know its a positive lead. Sorry, I'm not sure if they come in black.
I have been using one of those double terminal fuse blocks with one fuse for my inverter and the other for my charge controller. I have yet to blow a fuse though, but I keep a couple spares on hand.
No comments about both wires on top of the fuse? The jumper wire from the other battery should remain on the battery terminal. Only one wire, to the RV, should be "after" (on the fuse terminal) .
Yes, correction was noted in the video title and the description back when the video was first published.
What if you have 400 amp battry bank?
I think you may be confusing amp hour capacity with amp output. You want the fuse to be a little bit above the max amps you will be drawing from the battery bank to power things. 400 Amp hours of battery capacity is common, it only takes about 4 batteries, but to draw 400 amps would be a lot for the average RV DC power system.
Angie saw the mistake but didn’t say anything being man’s best friend she was waiting till after the video. Being a well mannered girl! After Ray made the comment about her being deaf she just shut down on her QA duties.
Angelina Beagle-eena (spelling?) hahaha!
I wish it was a switched fuse block.
HELP,,,this fuse /breaker stuff is confusing me. i bought a power jack 5000 watt/20000 watt surge inverter/ charger . my 1400 watt AC blew the inverter fuse. it was only 25 amps? it has an 80 amp charger.i was told i needed 00 gage cables so i got them. i have 24vdc/109 Ah deep cell [2 x 12 ] and want a breaker /cut off on those cables ,so i asked them what size .they said 20 amp 250 volt.thats not right.this is lucky to make 3000 watts and as far as i can tell,the 20000 watt surge rating is a myth. still works great though overrated. i think they had told me use 300 AMP FUSE on those battery cables,BECAUSE THAT IS WHAT I HAVE ON THERE NOW. I can't get a straight answer and when i do get them to email an answer,it is is in chinglish and makes no freaking sense. i want to get this put back together, but not till i know what is really safe.that 25a/32 volt inverter fuse blew instantly trying to start the soleus AIR,portable AC/heater unit. so any help would be great.
Here is a chart with recommended inverter cable and fuses sizes - www.altestore.com/howto/recommended-inverter-cables-sizing-and-breakers-or-fuses-a62/ AC units usually have a large start-up current demand to get the compressor going, your cheap inverter may not be able to deliver it.
One thing I also notice is you only have 2 batteries 12 volt 105AH, those will struggle to provide enough amperage to run the AC, you should have at least 4 and better to have 6. Even if your 2 batteries can run it don't expect it to run longer than maybe 45 minutes to 1 hour before the batteries are run down. Good luck, Ray
Why don’t you just edit this video with a photo of the correct parallel battery wire placement? It would take a few minutes and you’d be putting out 100% correct info.
A fuse for the fuse….
Basically ignore the other one its now a buss bar. Like I said it was a gift
Overkill for your set up. The odds you would ever short out that short length of cable is minimal.
I'll go with overkill. Years of repairing electronics has given me a healthy respect for what can happen. I even destroyed a few of my own tools and started a fire or two. ;)
Agreed. Overkill isn't possible when it's your home.
I have a BSEE and worked in the electronics field for 30 years. Ray I like your videos and I have never made any kind of negative comment, but this time it looks to me like you needed some content and this was an easy project to film.
Please practice speaking without the whistle in your voice. Very annoying.
Thanks for the feedback I'm looking to upgrade my camera soon to one in which I can plugin a quality external mic, should improve the audio quite a bit.