Bienveneetoes from SW AZ.. (SO glad it ain't 'from Lost Angeles', anymore!
Will be keen to 'talk shop' with ya sometime, David.. (not a 'battery guy', nor solar, but have been a 'Tech at en Engineer-level' for many years working with Laser Systems / Electronics, etc.. Same here: a Quick study, and an insatiable Learner.
Keen to know (and, 'not here' / some Other thread, is fine - this is just to 'seed further discussion') your thoughts on "Used" / blem 'Commercial-grade' Panels, ie:
https://www.santansolar.com/product-category/solar-panels/used-solar-panels/
..We've not used them (specifically) yet, but Do have friends that say they've (specifically) been Great.. Interested in feedback on 'Which Brands, therein' are good / bad / ugly, etc.. Again, we can start another thread / chat yonder, about it, just tossing a horseshoe out into the ring to get started.
Cheers and again, Welcome to the Fam.
jd