Upgrading your battery charger with lithium / With
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- เผยแพร่เมื่อ 14 ต.ค. 2024
- Upgrading your battery charger with lithium. Today we talked to Jared Gillis with @All About RV's about what we need to consider when upgrading to Lithium batteries.
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I have a 2007 trailer with a WFCO 8945AN converter. I just installed a Feence Elefast group 24 100ah lifepo4 battery. While waiting for the auto detect replacement converter I thought I would try the old one, it charged the battery to 105 ah -100% and after sitting overnight the cells were balanced.
If you have solar on the roof of your rv they can supplement the charging of your lithium batteries using the basic converter. In other words the converter will charge your lithium batteries up to 80% and then your solar will help to top that off to a 100% until your replace your converter with a lithium compatible converter.
I was going to ask a question slightly related to this. If I did not change the charge controller, but after a trip if I had my rig in my driveway and I connected an external lithium charger that I use for my trolling motor batteries, would this balance out the lithium batteries on my rig? Just thinking of doing this in stages, since money is a little tight right now. The last time I checked a new PD charge unit was only a few hundred dollars, so I should probably just make the switch. Note: I do have a 100W solar panel on the unit.
Good information. Tried explaining this to a buddy that put 2 lithium batteries in his rig w/ older converter. He didn't want to spend the money, thought they'd perform just fine. Then he started complaining batteries did seem to last long. Badda Bing- Badda Boom you guys explained it and now he upgraded.
thanks for sharing.
Thanks RV experts!
you are welcome
Thanks for confirming! The same day this video was posted, I changed my converter to a Auto Detect model to charge my new new lithium 100 battery.
Very cool!
Great show Thanks
Glad you enjoyed it
Great stuff guys
Can you give info on the tow vehicle charge capability through the 7 pin connector? I did the converter upgrade on the 5th wheel and only have one lithium battery with no solar charging. Will my trucks alternator be harmed while towing? Do I need to change anything?
Please, somebody answer this. I've been told that lithium-ion batteries can charge so much faster than lead acid batteries that it can damage your alternator. So you need to install a 20amp regulator to limit the rate of charging. Is this true?
Yes, you need a DC to DC charger line for the 7 pin. Will put a strain on the Alt without it because Lifepo4 will take all the amps your Alt will put out vs what a lead acid would.
@@MrTeff999 see below
What about when your travel trailer is connected to your vehicle? At that point, the alternator keeps the trailer's battery charged. Will that charging system cause any issues while traveling long distances?
Yes, it will toast the alternator.
Use a Li-Bim 225 isolation manager to protect it.
If you are considering Lithium batteries, look into Lithium Iron Phosphate batteries, they have higher capacity per weight and are less flammable.
Lithium Iron Phosphate batteries is the standard lithium for RVs. No one really uses lithium ion anymore for RVs.
Just had to replace my Freedom 458 inverter/charger this past summer. Will this work with a Lithium set up? My wet batteries are getting tired and I'd like to upgrade to Lithium. Output shows 14.4 volts at the output posts on the new Freedom 458. I'd hate to have to go out and buy a different charger is all. Thanks!
I am about to change to lithium. One 200 AH 200 BMS to replace 3 AGM's with a total of 345 AH. My converter/charger is the older model and not compatible. They also promote a small battery charger when buying a lithium battery. This battery plugs into a 120v outlet. My question is would it be counter productive to plug it in to my inverter to charge the battery ? I also have a 315 watt solar panel to help the charge.
I have a 2018 jayco Greyhawk id like to switch over to lithium you're saying i can use my setup currently in the rv? I also have 400 watts of solar with a lithium controller and Bluetooth do i still need to swith the converter?
Thank you for an excellent video for your two minute Tuesday I didn’t realize that was a possibility If I change my batteries to lithium do I need to change my cables from the batteries to the inverter and to the fuse panel and if I get a external charger for my battery to charge them up 100% without changing my cables do I stand the risk of fire
You'll want to upgrade the wiring if you are going to use an inverter more intensively. If you just want the extra capacity without using a larger inverter than the cables you currently have should be fine. just make sure your charger / converter is capable of charging lithium.
can you have multiple battery banks, a bank to run mandatory loads and one for other recreational decives, tv's internet? on battery bank do you need multiple cut off switches?
It should be noted it isn't necessary to swap out the converter charger if you have other charge options as part of your system, eg a solar charger or inverter/charger that are setup properly for lithium.
Good point. I’ve been thinking exactly the same but just don’t know if there could be a down side?. If solar charger will top batteries off to 100% to allow proper balancing then existing converter unit may only charge to 80% when plugged in to shore and no sun. Would we risk feedback burning up existing converter unit because of higher voltage level?. It may be best to check specs on your existing converter and make sure converter is protected from the higher voltage than charging capability. I just don’t know but think all should consider this is a potential risk.
@@jeffstrickland7688 on my system I just turned off the breaker to the converters charger and use the solar & inverter/charger to maintain the batteries.
@@marka9083 brilliant. I didn’t even think about that. If it is needed then it is there. Thanks.
Yes. Knowing your equipment and how its setup is key.
How about the pulling vehicle’s alternator?
the voltage isn't high enough to charge the lithium batteries. you can install a DC / DC charger to charge lithium batteries while you travel.
Hello, I want to replace the batteries of my motorhome for a 300ah lithium. I bought the victron isolated smart dc-dc 12v 30 amps. Can I connect the victron changer with the wires coming to my auxiliary batteries (by adding a 60 amp fuse protection at the input to the output) now to my new lithium without modifying the old installation...
Great video!
Glad you enjoyed it
I have a real old class c rv. In fact 1993 coachman. Thinking of upgrading to a lithium battery. Can i or should i just keep my agm battery?
If you upgrade your batteries it has to be upgraded all at the same time. Don't mix battery types.
We are planning a trip from texas to georgia and will be boondocking overnight at a cracker barrel. Many people in the FB group i joined suggested upgrading to lithium because i need to keep the propane fridge on. Also mentioned was a 1000 watt converter if I want to use the coffee pot. Is that possible?
My bms never work right ,put in simple 10.5 volt disconnect for your main concern.
I have a 30amp motor home i need to be able to charge my agm batteries faster i am looking for info on what the is the hight amperage converter charger i could use
Jared says: ... "if i upgrade my converter, I'm going to need to upsize the wires to provide the full charge faster...", but upsize to what gauge?
The wire gauge will depend on the distance between your converter and your batteries. Determine that distance and double it for the return trip, then find a DC wire size chart to determine the wire size you should use for that distance and the amperage you’re anticipating.
2 Guage seems to be a good starting point for the series wiring, after that couldn't tell ya. Guy that does redodo bat tests on TH-cam herewith white beard talksabout it
Does anything need to be added between the tow vehicle's alternator and the rv. My understanding is that if nothing is added then eventually it will burn up the tow vehicle's Alternator.
Li-Bim 225 isolation manager
My grey wolf says it's lithium ready so I shouldn't have to change anything. Does that sound correct?
yes. there should be a button on the charger to change it from Lead Acid to Lithium.
@@NationalRVTrainingAcademy thanks. Before I get one I'll look for that.
Hello Guys, How to make sure i need to replace my Cables for Bigger cables ? I just purchase a 12v 300ah Ampere Time & a Charger replacement for lithium upgrade for my 2014 toy hauler 50amps. Does it need to be done right away ? Thanks
So the cable size will be determined based on your demand not supply.
So if you gage an inverter then it’s a larger demand, if it’s just to run the 12volt items only then no need to increase the size.
We should have a link to the new battery charger for the lithium batteries
Great idea
amzn.to/3CZG2PT
What are the Alternator considerations in a motorized RV?
DC to DC Renogy sells many. I have a 40 amp in my DP. I have 10-100 amp batteries. Use caution on the amps you choose. A 2nd alternator is best. You should be fine with a 20 amp DC-DC charger with a singe alternator.
What if my RV has a lithium button in the fuse panel? What does that button do??
That is your Charger / converter. that button allows the charger to charge using the lithium voltage which will maximize the batteries performance.
@@NationalRVTrainingAcademy I could never really find any solid answers on that. So with a Battle Born battery and that switch on I should get a proper charge? Thanks for the reply 👍
So the short answer is yes. When you switch to LI in your fuse panel the charger will charge based on how it was programmed.
Is it the best? Hard to say as each lithium battery may require slightly different charges.
@@NationalRVTrainingAcademy Awsome. Thanks again guys!
Upgrade what wire fellas?
That's the 12v battery wires going between the batteries and the inverter and charger.
Seems #2 is a good starting point
14.6???? That should trigger the over voltage protection of the bms, as 3.65v per cell is the never exceed voltage.
Be forward thinking. If you install lithium batteries and you are going to install an inverter, you might want to not purchase a new converter as the inverter should have a charger. So you will be wasting money on the charger purchase. I know from experience 😢
That is correct if you know what equipment you are installing. there are many inverters that do not have any battery charging functions. there are many RV's now that have the charger that has both options right out of the dealership. know what you have and know what you want.
Is Todd really that short?
Believe it or not Todd is 6’-2”, Jarod is just that tall
That would over charge an start fire {charge to 85-90 percent .
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