Habitat for Humanity is installing solar panels on the rooftops of homes it's building from Chico to Fresno.
Almost 80 homes will have the solar installations because of a million dollar donation from Pacific Gas and Electric.
Frank Meyer is Director of Habitat for Humanity in Calaveras County.
He says low income families buy the homes but they won't be charged for the solar installations.
"The bottom line is that from our homeowners it's quite a bit of savings on their electric bill, those bills if there are any at all, they're five or six dollars a month to be hooked up."
PG&E says the average homeowner saves 500 dollars a year after going solar.
Habitat for Humanity Meyer says families use sweat equity, providing 400 hours of construction labor and then buying the homes with no interest loans.