Lithium batteries and new solar charger
I am replacing my 4 6V batteries I think 2 lithium, have never been impressed by the 30A PWM charger for my 600W solar, probably my fault for using 8 avg wire on a 9m run. Thinking if I get a Victron ...
Forum Discussion
100a charging on the 200AH LFPs is their recommended charging rate of 50% so you are good. You can use higher, but will lose some battery "lifetime" doing that very often. Using 50% charging rate, the graph for that shows tapering starts around 90-95% SOC, so you get longer constant amps in Bulk, which means less generator run time to get the recharge done.
Battle Born FAQ says to Float at 13.6v or lower. But their very own spec with their 100AH batt says float is 13.4 to 13.8v. Those voltages are supposed to be at 25C/77F and would be lower if hotter out and higher if colder out.
(They don't want you to adjust for temp when doing the actual charging to get the batts up in SOC though. Stay at 14.6 or less whatever they say for Vabs, since colder temp comp would make that higher in voltage--14.6 is 15.2 or whatever near freezing, and that temp comp would put you over the max of 14.6 right there.
So no temp comp when using 14.x. Temp comp should be ok with 13.x ? Don't know, but to play it safe IMO stick to about 13.5v no matter what and you should be good.
Battle Born FAQ says to Float at 13.6v or lower. But their very own spec with their 100AH batt says float is 13.4 to 13.8v. Those voltages are supposed to be at 25C/77F and would be lower if hotter out and higher if colder out.
(They don't want you to adjust for temp when doing the actual charging to get the batts up in SOC though. Stay at 14.6 or less whatever they say for Vabs, since colder temp comp would make that higher in voltage--14.6 is 15.2 or whatever near freezing, and that temp comp would put you over the max of 14.6 right there.
So no temp comp when using 14.x. Temp comp should be ok with 13.x ? Don't know, but to play it safe IMO stick to about 13.5v no matter what and you should be good.
