OK I just put my address into the calculator and I think the thing's bogus. Without asking anything about my house size or my solar exposure, based solely on my address, it gives me a hard figure ($53,100) for the roof cost and a 30-year energy income of $76,100.
I call bullshit. First, I do not believe they actually know the size of my house or the orientation of the (numerous) roof pitches to the sun. Spoiler: it's only 1300 sq feet and the longest roof ridge is oriented NW-SE, far from optimal for exposure.
Then there are the three very large oak trees that shadow it from three sides.
Then there is the fact that my utility is a local one, not PG&E, and I doubt they took the different rate structure into account. And if they did, how the F do they know what Palo Alto utilities will charging in 10, 20 or 30 years?
They don't know. The whole calculator is a bogus fantasy toy.
That's actually exactly the data they're getting from Google's project Sunroof. I'm not sure how correct that data is, but I haven't seen many complaints.
I call bullshit. First, I do not believe they actually know the size of my house or the orientation of the (numerous) roof pitches to the sun. Spoiler: it's only 1300 sq feet and the longest roof ridge is oriented NW-SE, far from optimal for exposure.
Then there are the three very large oak trees that shadow it from three sides.
Then there is the fact that my utility is a local one, not PG&E, and I doubt they took the different rate structure into account. And if they did, how the F do they know what Palo Alto utilities will charging in 10, 20 or 30 years?
They don't know. The whole calculator is a bogus fantasy toy.