Battery BMS sizes

[Jim in NH]

I have a Growatt 3K 24 Volt System that has 4 12v AGM batteries configured S/P

I want to upgrade to LITime LifePo Batteries.

I can get 24v 100AH 100 amp BMS on sale for $516.71 or 24v 200AH 200 amp BMS for $1,409

My question is the two 24v 100AH with 100amp BMS limited to 100amp draw at peak? I am not quite sure on sizing the BMS in a parallel configuration.

Am I better off spending the extra $375 to get the 200 amp BMS and a single battery?

 

[FilterGuy]

My question is the two 24v 100AH with 100amp BMS limited to 100amp draw at peak?

When wired in parallel, two batteries with 100A BMS can supply 20A.200A

 

[timselectric]

I have a Growatt 3K 24 Volt System that has 4 12v AGM batteries configured S/P

I want to upgrade to LITime LifePo Batteries.

I can get 24v 100AH 100 amp BMS on sale for $516.71 or 24v 200AH 200 amp BMS for $1,409

My question is the two 24v 100AH with 100amp BMS limited to 100amp draw at peak? I am not quite sure on sizing the BMS in a parallel configuration.

Am I better off spending the extra $375 to get the 200 amp BMS and a single battery?

Either way gives you 200a.
But two batteries gives you redundancy.
If one fails, you won't be completely out of commission.

 

[Jim in NH]

>>When wired in parallel, two batteries with 100A BMS can supply 20A.

Did you mean 200A (not 20A?)

Thanks...

 

[FilterGuy]

>>When wired in parallel, two batteries with 100A BMS can supply 20A.

Did you mean 200A (not 20A?)

Thanks...

Yes sorry for the typo. I'll correct it.