Solar generators are very useful backup power source in the case of a power outage or emergency situation.  To make the right solar generator purchase, you'll want to have an idea of the required voltage and total wattage of the devices & appliances you want to keep alive during a blackout.  Then, search for solar generators that supply that level of wattage, and make sure they have the right type & number of outlets (12V, 110V, 220V, USB, 2A, etc.). If you are really committed to buying a completely renewable backup generator for your tiny home and want enough backup/standby power to run your air conditioner and refrigerator for days, then you can always purchase multiple generators and run them together.