...although the math should only be the third ranking reason to adopt PV on your property.

Reason one is that our systems are designed to a 30 year life--providing clean power, carbon free power, when the sun is shining.  No moving parts.

Reason two is that PV is a relatively painless way to start making the changes we all need to make to minimize the effect of CO2 in the atmosphere.

And reason three is that the math works.  Now.   Even before PG&E's seven percent rate increase.  How many of your investments get you 10% returns--with no downside?