Hi all, new here, first post. Been watching a lot of youtube videos about batteries/solar and trying to learn as much as possible. We recently ordered an LTV U24TB RV. Won’t get it for at least another year as there’s huge backlogs in the RV world. I ordered the 400w solar panels, it will have a 2000w inverter and a 3600w generator. House batteries can be charged by solar, generator, shore power or alternator.
Situation, at first I chose the AGM batteries (2 x 100A) which was included in the cost of the RV. After much research on the net I came to the conclusion that I needed lithium’s so I upgraded my purchase order. The upgrade cost for 2 Battle Born 100A batteries is $4500 CDN (I’m in Montréal). Watched many of Will’s videos and I can get the Aliexpress 280ah kit delivered to my house for $650CDN. Two kits @ $1300 would supply me nearly 7.2kw of power versus the LTV upgrade of 2.5kw‘s for $4500. I already validated that the solar controller, dc to dc charger and house charger are all lithium compatible, just need to program them.
Assumptions, if I reverse my upgrade and go back to AGM I will have two new batteries to sell. The batteries are side by side in the footwell and I am sure all wiring can support the inverters 2000W draw.
Question, so is the proper approach to build two 12.8v, 280Ah batteries. I believe I would need two BMS’s, one for each battery. I believe once these are built it would be a simple question of removing the AGM and installing the 2 LiFeP04’s. I need BMS’s with low temp charge protection, does Daly make this yet. Also another question is, will a 100A BMS per battery suffice as once they are paralleled I would have 2,560W to power my 2000W inverter or does each battery need a 200A BMS to take the whole load.
Appreciate comments and opinions on what to do and how.
Thanks, Norm
Situation, at first I chose the AGM batteries (2 x 100A) which was included in the cost of the RV. After much research on the net I came to the conclusion that I needed lithium’s so I upgraded my purchase order. The upgrade cost for 2 Battle Born 100A batteries is $4500 CDN (I’m in Montréal). Watched many of Will’s videos and I can get the Aliexpress 280ah kit delivered to my house for $650CDN. Two kits @ $1300 would supply me nearly 7.2kw of power versus the LTV upgrade of 2.5kw‘s for $4500. I already validated that the solar controller, dc to dc charger and house charger are all lithium compatible, just need to program them.
Assumptions, if I reverse my upgrade and go back to AGM I will have two new batteries to sell. The batteries are side by side in the footwell and I am sure all wiring can support the inverters 2000W draw.
Question, so is the proper approach to build two 12.8v, 280Ah batteries. I believe I would need two BMS’s, one for each battery. I believe once these are built it would be a simple question of removing the AGM and installing the 2 LiFeP04’s. I need BMS’s with low temp charge protection, does Daly make this yet. Also another question is, will a 100A BMS per battery suffice as once they are paralleled I would have 2,560W to power my 2000W inverter or does each battery need a 200A BMS to take the whole load.
Appreciate comments and opinions on what to do and how.
Thanks, Norm