Western grid operators have been making plans for large-scale renewable energy imports into the California electricity market, prompting the governor’s Senior Advisor for Renewable Energy Facilities to write a “self-reliance” response.

Here are a few highlights of his letter to the Western Electricity Coordinating Council (WECC):

California has plenty of in-state development: “The California Independent System Operator indicates that renewable projects totaling 70,000 MW of installed capacity [nearly enough to meet all of the state's peak summer demand] are seeking to connect to the CAISO-managed grid.”

Transmission costs are up, waaay up.  In particular, “the developer of at least one significant line, TransWest Express, expects the project to cost about 70 percent more than WECC’s original assumptions…we thus appreciate the ongoing efforts of WECC staff to review these and other assumptions and to revise capital cost assumptions upward.”

Transmission line risks: “transmission lines proposed to stretch hundreds of miles over private and public lands face significant permitting and development risk – perhaps most so in the case of DC lines, which offer few electrical benefits to the states they cross.”

In summary, California has a robust in-state market for renewable energy and sufficient in-state renewable resources to serve its entire electricity needs, so Western states would do well to temper their export optimism.