Well after some time I've decided that the FLA (flooded lead acid) batteries I put into the shed are past their use by date. Not bad really as they were installed new in 2022, which is about 4 years ago.
I'm presently running a pair of donated 24V LiFePO4 batteries that a mate bought (believing the Temu ad) in parallel.
you can see that the foot-print of the pair of 24V's is about half what the pair of 12V's was but they had a RC of 95 (meaning that the battery would survive for 95 minutes under a constant 25amp load before 10.5V is hit ... optimistic if you ask me)
I've never been really satisfied with how the recharge after discarges (probably due to the internal resistance of FLA). See this post for my analysis back then.
This is one ofthe tiddlers ... rated at 200Ah
talk about optimism ... I pulled one apart and the Cells were 7Ah and there wasn't anywhere near enough of them. Further, the BMS was clamped at 9Amps.
Well that's 400W or so, so it'll do for now ... I'll post again when the new cells arive
