Although this doesn't exactly answer your question specifically, I'll add here that I use a Battery Tender model 0211162 solar charge controller with a 12X18" small solar panel (edit: I looked up the panel I'm using and it's a 5W panel, so the lowest possible input power) to continuously...
Thank you all for your information on this thread! I was about to ask some similar questions but searched first and was glad to see others with similar plans.
I'm currently building an EG4 6000XP system for my small house and have that situation well in hand, with the plan for my entire...