Also should be noted to get multiple estimates, even though that's kind of common sense. I had them vary wildly, where the most expensive one was literally twice as much as the cheapest one.
I got three estimates. Huge variety in price. All three companies sent someone out to survey the house. Two were very friendly salesmen who took photos of the roof and told me how much I would save, but couldn't answer technical questions. The third company sent out an engineer, who came into the house and talked me through where the inverter would be best situated, how the batteries worked, the benefits of a diverter etc. Third company instilled the most confidence and they were also the cheapest. Went with them.
