steven1955
New Member
I have a 1975 FMC 2900r motorhome with cooked AGM house batteries, so it's time to upgrade to LiFePO4. The existing 12V nominal power converter would be retired and appropriate LiFePO4 chargers would be installed along with appropriate wiring, fusing, etc.
There are two unused awkwardly shaped spots in the motorhome I cannot fit any of the premade batteries I can find, but I can fit 4 CATL 302Ah 12V packs in a 2 x 2 stack (vs the most common 1 x 4 stack) in two different places. The catch is that in one spot the cells would be on their sides, and in the other spot the cells would be angled at about 45 degrees off horizontal. I have looked to see if CATL specifies acceptable operating positions, but have found nothing.
These home made battery packs would not be in a housing, but they would be installed so that they could not shift position, and all wiring would be protected against being crushed or short circuited.
If I don't build these packs and use commercially available batteries I have to sacrifice useful storage space, so the driver here is to save our storage space, not money. And I don't really need another project, but I'd really like to keep all of my storage space.
And if I end up building these packs, I'll need a suitable BMS. These cells have a rated maximum discharge current of 302A, but I don't need that much. I'd like to keep this at 150 to 200 amps, and don't know enough about BMS's to know if the BMS can be rated lower than the battery maximum discharge current.
Thanks in advance for any guidance.
There are two unused awkwardly shaped spots in the motorhome I cannot fit any of the premade batteries I can find, but I can fit 4 CATL 302Ah 12V packs in a 2 x 2 stack (vs the most common 1 x 4 stack) in two different places. The catch is that in one spot the cells would be on their sides, and in the other spot the cells would be angled at about 45 degrees off horizontal. I have looked to see if CATL specifies acceptable operating positions, but have found nothing.
These home made battery packs would not be in a housing, but they would be installed so that they could not shift position, and all wiring would be protected against being crushed or short circuited.
If I don't build these packs and use commercially available batteries I have to sacrifice useful storage space, so the driver here is to save our storage space, not money. And I don't really need another project, but I'd really like to keep all of my storage space.
And if I end up building these packs, I'll need a suitable BMS. These cells have a rated maximum discharge current of 302A, but I don't need that much. I'd like to keep this at 150 to 200 amps, and don't know enough about BMS's to know if the BMS can be rated lower than the battery maximum discharge current.
Thanks in advance for any guidance.