A good portable private charger solar panel/inverter/batteries goes for like 3k.
1.2 kilowatt, say two 600 watt bifacial panels for 800$, 400 amp hours of batteries (1,200$), and inverter box for 1,000$ Rig it all up like this guy has his.
https://www.youtube.com/watch?v=rjVwIREjfxI
Throw it in the back of a 4x4 truck bed, and you have potable power practically anywhere in the united states. That's enough to power a minifridge, a t.v., cellular/satellite internet, a tea kettle, water pump, and a small window air-conditioning unit.