I was pleasantly surprised to see a Tesla e-mail soliciting a solar roof. You fill out the form and a certified installer will call. Their recommendation: My bill - $155 in August for electricity 8.1 kW Solar Panels 2 Powerwalls Eagle Solar & Light I selected solar panels because the house has a new roof, less than two years old. I see the air gap between the panels and roof as being a way to keep solar heat from the attic. There are two large pine trees to the Southwest but I will take them down for solar. Bob Wilson