As provided by SFAR:

San Francisco homeowners have a new way of paying for solar panels, energy-efficient appliances and low-flow toilets.

A new city-run program, GreenFinanceSF, will give San Franciscans the money to pay for such projects up front and let them pay it back through installments on their property tax bills. Berkeley pioneered the idea in 2007, and since then, hundreds of cities, counties and states have adopted their own versions.

For more details, visit http://greenfinancesf.org/systems/energy.