At the end of charging, solar or AC-DC, voltage readings on (either of) our two 24V LiFePO4 130AHr ready-made batteries, dance. V skips above and below 28V, a few skips/second.
My amateur guess, and hope, is that the BMS is working hard balancing the cells.
Can anyone confirm or enlighten?
BMS is JBD-SP08S004 V1.2 (Bluetooth module on order.)
Constant Voltage is set 28.8 or lower
Float 27.6 or disabled
LowV Disconnect should be 22.4V
Seller claims there's '3A Active Balancing' but I wonder...
I'm trying to 'cycle them into balance,' on the advice of the seller, hoping they'll stop cutting out at about 25V in a capacity test. (Well, 50V because they're used in series as a 48V bank, but being charged & discharged separately for now.) I've only been able to draw 105AHrs or so before BMS cutoff. A bit of a hazard, as they're meant to power our yacht's propeller. In practice, I'd only want to run down to 24V + a bit.
Batteries are 'Platinum LiFePO4' drop-ins from MicroMall in Auckland NZ. Solidly put together, stainless steel case, and I was happy to see a JBD BMS inside. I can't comment on the quality or matchedness of the cells. Yet.
Anyone in NZ or anywhere with experience of these batteries?
Thanks,
KJU
My amateur guess, and hope, is that the BMS is working hard balancing the cells.
Can anyone confirm or enlighten?
BMS is JBD-SP08S004 V1.2 (Bluetooth module on order.)
Constant Voltage is set 28.8 or lower
Float 27.6 or disabled
LowV Disconnect should be 22.4V
Seller claims there's '3A Active Balancing' but I wonder...
I'm trying to 'cycle them into balance,' on the advice of the seller, hoping they'll stop cutting out at about 25V in a capacity test. (Well, 50V because they're used in series as a 48V bank, but being charged & discharged separately for now.) I've only been able to draw 105AHrs or so before BMS cutoff. A bit of a hazard, as they're meant to power our yacht's propeller. In practice, I'd only want to run down to 24V + a bit.
Batteries are 'Platinum LiFePO4' drop-ins from MicroMall in Auckland NZ. Solidly put together, stainless steel case, and I was happy to see a JBD BMS inside. I can't comment on the quality or matchedness of the cells. Yet.
Anyone in NZ or anywhere with experience of these batteries?
Thanks,
KJU