Clean energy solutions provider EnerNOC (Nasdaq: ENOC) said today it has extended an existing 40 megawatt demand response agreement with Southern California Edison, a division of Edison International (NYSE: EIX).

The agreement, which expires in 2012, includes up to 110 MW of capacity.

The capacity under an initial 40 MW agreement, which expires at the end of this year, is expected to be enrolled under the new agreement, resulting in a four-year extension and an additional 70 MW of contracted capacity between the parties.

The new agreement is subject to final approval by the California Public Utilities Commission.

"California's energy demand cannot be met by supply-side solutions alone, and we believe that technology-enabled demand response is an important and sustainable component of our energy future," said Tim Healy, chairman and CEO of EnerNOC.

EnerNOC said it would continue to aggregate demand response capacity from commercial, institutional and industrial customers within SCE's approximately 50,000 square-mile service territory.

According to the companies, during periods of peak demand, SCE will signal EnerNOC to provide demand response capacity, with EnerNOC remotely initiating demand response measures at participating customers' sites and monitoring performance from its network operations center.

This deal is part of SCE's larger renewable energy portfolio, as earlier this month SCE signed a 245 MW solar thermal deal with eSolar (see SCE brings more solar thermal to California).

Earlier this week EnerNOC announced it would provide the Tennessee Valley Authority with a minimum of 110 MW of demand response capacity, effective immediately (see EnerNOC signs contract with Tennessee Valley Authority).