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It probably won't help... but... Solar Panels are classified in "tiers"
Tier 1 is the best, Tier 2 not quite as good, etc.

All Solar Panels deteriorate and the main difference in tiers and price...

Best kit of the 5 - the first one

Best bang for your buck - probably the last one

Just MHO but I am not a big fan of 'hard' mounting panels on a vehicle because;

You have to park your vehicle in the sun (yes, that is Captain Obvious speaking) and I hate that.

A panel that is...

In simplest terms...

Mono are more efficient than Poly panels... IE a Mono panel is about 5% more than a Poly panel.
For camping this usually doesn't matter all that much as all it means is that...