LiFePO Batteries ???

[airshot]

I went on there...there is no mention at all of 2C charging. It does however say the BMS can handle 100A but they recommend 20A.View attachment 407274

I have the 140 ah battery, bigger BMS system and different charging capacities according to Time USB messages sent to me. According to them the battery can handle a 2c charge rate but not recommended for longest life.

 

[bruceb58]

I have the 140 ah battery, bigger BMS system and different charging capacities according to Time USB messages sent to me. According to them the battery can handle a 2c charge rate but not recommended for longest life.

Here are the 140AH battery specs

 

[bruceb58]

I'm thinking that the BMS did not protect the battery (cells) to the extent that it should have. The other battery (it's twin hooked in parallel) came to life with just a quick touch of the trickle charger. and was sitting at 11.5 volts after activation . . . now fully charged.

The BMS did its job..it turned off the battery when either the total voltage went below a limit or one of the cells went below the limit. The problem is, the cells keep self discharging even after the BMS turns off so the cells continued to self discharge over winter until they got to a point where they are unrecoverable.

LiFePO4 self discharge 1-3% depending on whose specs you are reading.

 

[bruceb58]

LiFePO4 self discharge 1-3% depending on whose specs you are reading.

Per month!

 

[tpenfield]

I ordered another battery . . . Same as the others. Not sure how long the replacement will take and I did not want to start off the season with just 1 100 Ah battery for the 'house' loads.

When I get the replacement, I'll work it in as a third battery, so I'll have 300 Ah of capacity on the 'house' circuit.

$279 all-in . . . which is not too bad.