We contacted 2 companies to install a generator, Go Green showed up first. the second one was much more thorough, gave us an estimate the next day, and really knew what he was doing, looked at the electrical panel, etc. Go Green didn't mention that the generator had to be 10 ft from an operable window, so that would've been a huge problem if we blindly had them install it, finally gave us the estimate after calling them 3 or 4 times. it came in almost 3 times more than the other company and it was for a smaller unit. I would look around.