I have a 300Ah battery which is near-dead (Abused in the past, around 5 years old) and want to replace it with 4-6 new 100Ah. The current method of charging is with a 30A MPPT solar controller.
As the sun starts rising the panels start charging it, but they start with a trickle and work their way up to around 25A.
My question is, is this method of charging OK (start slow and build up)? Or should I disable the charger until there is more likely to be full-sun and charge it harder to start? I don't mind buying more panels and a bigger charger if I need to.
I can control the charger with an Arduino and the home automation system I have, so that is not a problem.
With the next setup I don't discharge it below 12.1V under load, 12.2V at rest, so new batteries will not get abused.
Thanks in advance.