I went on energystar [dot] gov and used their product finder to find the lowest "annual energy use" compact refrigerator. For my use, that turned out to be the FURRION - FCR43ACA-BL which has an estimated 151 kWh/yr annual energy usage rating. I then wanted to run this off of one solar panel. Now I'm new to solar, so I also need a battery, an inverter, and a charge controller.
What I'd like to know is after expenses
(1) solar panel (2) battery (3) inverter (4) charge controller
at what point, in practice, does this pay itself off compared to PG&E at $0.12/kWh? I mean, if 1-4 costs, say, $300, then if the fridge is costing me $18.12/yr from PG&E to run, then does that mean it takes 16.5 years to pay off? If so, then can I get 1-4 low enough to make the investment worth it? Paying it off in 3-4 years seems worth it but 1-4 isn't going to cost $72.48.