battery choice
Hi, I am in analysis paralysis. I will be purchasing AGM jars. Here are my two choices: AGM L-16 Surrette 400 amp-hour six volt with 0.145 plates cost $520 plus tax and shipping Four are n...
Forum Discussion
Rolls Support Desk
"The initial charge current is recommended to be set at I1= 0.25 X C20 (Imax= 0.35 X C20) in order to fully charge the batteries within a reasonable amount of time. It can be set lower, however please be aware that charge time will increase so make sure the batteries have enough time to fully charge before being put back into service. Rolls AGM batteries have a low internal resistance allowing them to be charged at a higher current, therefore faster, than conventional flooded/wet batteries."
... so 35% max., or 140a on a 400Ah bank.
In their user manual, they say 20%... 'because a higher current may result in overheating'. So the concern seems to be mostly about battery temps. Apparently, as long as temps stay below a given temp, a higher rate is fine.
"The initial charge current is recommended to be set at I1= 0.25 X C20 (Imax= 0.35 X C20) in order to fully charge the batteries within a reasonable amount of time. It can be set lower, however please be aware that charge time will increase so make sure the batteries have enough time to fully charge before being put back into service. Rolls AGM batteries have a low internal resistance allowing them to be charged at a higher current, therefore faster, than conventional flooded/wet batteries."
... so 35% max., or 140a on a 400Ah bank.
In their user manual, they say 20%... 'because a higher current may result in overheating'. So the concern seems to be mostly about battery temps. Apparently, as long as temps stay below a given temp, a higher rate is fine.
