Charge controller for each solar panel?

[ramblinrod]

Originally Posted by Maine Sail

If the battery is being used regularly, so that it never actually attains 100% SOC then this can work. If however you leave it unattended the voltage will get pushed well beyond 15V regularly and eventually destroy the battery.

I had a 15W panel on a grp 24 for 6 years. That's about long they last with a regulator too. Go figure.