Four aeroderivative natural gas turbine generators are now in operation in California following a July emergency proclamation to increase summer capacity, regulatory order for emergency generators and a tariff waiver to increase interconnection capacity.

Two units each were installed at Greenleaf 1 in Yuba City, operated by Calpine Greenleaf Holdings, and Roseville Energy Park, operated by Roseville Electric. Each unit has 30 MW capacity. The units run on natural gas, but can run on a blend of up to 75% hydrogen.

Read more here.