Note, if you decide on a generator: We live off the grid, and are exploring solar for the new TH we bought last month. I saw the price you quoted for a generator. I would be very leery of a $150 generator. In our experience, living off the grid, the cheap generators surge way too much, don't have good steady power and burn up appliances. We tried 4 before giving up on the inexpensive not inverter types. Go with the 1000 watt Honda or Yamaha inverter generators that others suggested. The total cost will be less than replacing your burnt out frig!
We will be adding solar AND having a generator. In our house, we rely on the solar but know we often need the backup, especially in bad weather, of which there is a lot in Northern NY! We love our solar. BTW, solar hot water is awesome! We never need to use propane to heat up our water.