EDITORIAL The way the San Francisco Chronicle describes it, the city's new green power program "won't come cheap." That's a line that Pacific Gas and Electric Co. will use over and over again in the next few months as the city finally prepares to get into the retail electricity business, 98 years after Congress mandated public power for San Francisco. Clean Power SF will offer 100 percent clean energy — and yes, right now, this spring, it will cost a little bit more than buying nuclear and coal power from PG&E.

But that price differential will change dramatically in the next few years — if the city goes forward not just with buying and aggregating power from the commercial market but developing renewable energy on its own.

That's the key to the future of Clean Power SF — and as a proposed contract to get the system up and running comes to the Board of Supervisors, the need for a city build-out of at least 210 megawatts of energy generation capacity is, and must be, an essential part of the plan. Read more »