Solar power is looking at some African continent, since we have a lot of sunlight and the hydro power center can not supply enough. There are several power banks guaranteed in any place. A row is in a few steps. If not left without power.
I have two similar batteries in my house, so it will be charged for at least 2-3 days and even hidden behind the clouds under the sun.
RE: Tesla Power Wall...For A Tent?? Solar Energy (With Storage) For Camping