A Big Zero

Pretty disappointed with the Yeti 1500x paired with Nomad 200 panel. Even though I put a lot of research into this before spending the cash, it wasn't enough. Research that is.
Tested first day I received it. Perfect sunny day with full sun on panels. Started well until one little, and I mean little, cloud drifted in front of the sun. Basically enough of a cloud to just cover the sun in the sky. The Yeti flat out quit charging completely. Mind you, it was the only cloud in the sky. Once the cloud passed it began to charge again. So I'm thinking to myself, if I'm out on a hunt, fishing or just camping and I need to rely on this set up for power, I'd better pray for nothing but full sunny days.
Now I've see. Other units accept a charge on overcast days so I know it's possible. But not so with GZ. Talked to a guy in town who runs a solar company and he gave me a whole run down of why GZ needs so much juice coming in before it will take a charge. Way more than I needed to know or could understand. I just want some standby power while out in the woods and that doesn't always happen on sunny days.