It's a 15kW system so $9-$10 a watt is what solar costs right now. A home would use a fifth of that. Unless it is Al Gore's home.

The average home uses about 900 kWh http://www.epa.gov/climatechange/emissions/ind_assumptions.html, so you are saying a 3kW system produces 900 kWh in a month in Mass?

I'm saying Massachusetts need to install more compact flourescent lightbulbs.

Mass was 46th in per capita electricity use in 2005, http://www.energy.ca.gov/electricity/us_per_capita_electricity_2005.html.

California was 51st. Which just means we import our electricity from other states. Someone who is using 900kWhs a month doesn't need more solar panels. They need energy star appliances.

Retail sales include imports, California has low usage due to high rates and mild climate.