Very useful comments -- thanks! If I decide to keep this panel, I would use it to charge a group 31 deep cycle battery, with 110 amp/hour capacity.
My existing 120 watt panel fully recharges my battery every day -- we carry a spare battery but never need it! (And yes, we carry a generator, also never run it.)
So this new 100 watt panel (if it works with a 12 volt battery) would just add to my existing charging options.
And yes, it is clearly too expensive on a "per watt" basis -- but it folds easily, it is very light, and it is easy to store. Those are important considerations, especially since our trailer is so small.
