Why does my solar not charge to 100%?

[Lenny HB]

I have never had AGM battery’s so only know the little I have read about them, from what I read though they take a long time to get to 100% SOC don’t they? Or am I confusing them with Gel? Could part of the problem be it’s dropping off around the 85% SoC then slowly filling up? Although the drive home wouldn’t do it if that was it so I am probably confusing myself

That is Gels.

 

[nabsim]

That is Gels.

Thanks Lenny