Have used their 100W panels...
I have 2 of the Regony 100w panels feeding into 4 massive 6 volt fork-lift batteries. Output from the panels is adjusted by one of their regulators which feeds into a 1100w Inverter. You can’t beat this arrangement especially, as you noted, the Monocrystalline panels generate power even in full shade.
Also, it is substantially quieter than a gasoline generator - a critical element for any Prepper.
Sounds like a very nice set-up, something I'd been considering in the back of mind as the next phase. Dare I ask about the cost of those forklift batteries? ;>)