San Francisco officials contacted the Marin Energy Authority recently to explore options, the Marin Independent Journal reported.
San Francisco officials voted in 2012 to approve CleanPowerSF, a public utility meant to compete with PG&E and give residents the option of obtaining more of their electricity from renewable sources.
But implementing the program has been stymied by city public utilities officials, who declined to set rates for it.
Marin energy officials say they are exploring the idea of allowing San Francisco to link up with its program and would discuss the issue early next year.
San Francisco has 475,000 electricity accounts, according to PG&E. Marin Energy Authority has about 120,000.
Marin’s program is seeking to expand, but is currently eyeing communities within 30 miles and with fewer than 40,000 accounts.