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Todd Strauss – Senior Director, PG&E
Kate McGinnis – Market Director, AES Energy Storage
Barry Cinnamon – CEO, Cinnamon Energy Systems
Moderator: Jeff Byron, Band of Angels
What will it take in terms of megawatts of energy storage and dollars to flatten the belly of California's famous duck curve and meet the 2030 RPS goals?
Which storage solutions will prevail: customer-side, behind the meter or at utility scale, in front of the meter?
What are the costs and benefits of each type of solution?
In mid-May, California broke a record in a single day: 67% of its energy was generated by renewable electricity sources on the portion of the grid controlled by the CAISO. While this is a major achievement, maintaining this level of renewable energy generation from different sources is a challenge.
California is a leader not only in renewable energy sources, but also in energy storage. The country has one of the highest standards in the country for renewable energy sources, requiring 50% of energy generation to come from renewable sources by 2030. Currently, 27% of our electricity comes from renewable sources and we are ahead of our RPS targets of meeting 33% renewable energy sources. by 2020.
The electricity grid is a complex system in which energy supply and demand must always be matched at all times. Because renewable sources such as wind and solar energy are subject to variability, energy storage helps smooth out the differences between energy supply and demand. It stores excess energy when supply exceeds demand, and transmits energy when demand exceeds supply.
Today's energy storage companies go a step further by not only providing backup power to customers or the grid, but also the ability to respond immediately to the grid's needs. This combination of flexibility and the ability to ship is a valuable asset.
Until recently, the cost of energy storage was prohibitive, but battery prices have fallen rapidly in recent years and are expected to continue to fall due to technological improvements and production scale.
Note: Although other storage technologies are also being developed, this discussion will focus on chemical batteries, which are by far the most common.
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