My electric cooler is noisy and power-hungry, but I do rather enjoy being able to offer cooled beer to visitors. And offering a cool beer while outdoors seems even more suave than having to trot indoors every time it's time to replenish.
I have an old solar panel which I have been saving for some as of yet undecided project, I hooked it up to a solar charger and a 7,2 ah battery, and thus made myself a stand-alone outdoors solar powered electrical cooler.
Hooking the panels directly to the cooler does not work. Enough volts, not enough amperage, I'm guessing.
This system only works with lots of sun. Either that, or a much larger (and charged) battery.