Renewable energy & storage

Other energy sources

Our approach

PG&E is working to ensure that California’s sustainable energy future is both reliable and clean and we have a strong conviction we can do both.

The dynamics of California’s energy landscape continue to evolve with retail customer choice, advancing energy storage technologies, declining use of conventional power plants, and the growth of distributed energy resources, including rooftop solar and battery storage. Utility-scale renewable energy also continues to grow. We are managing this transition by optimizing our existing portfolio and adding more renewable energy and energy storage to our power portfolio.

As we endeavor to build a smarter grid, PG&E will continue to gain greater visibility to improve operational performance and more effectively integrate renewable energy onto the grid.

More battery power to integrate renewable energy

There are times during the middle of the day when California’s renewable resources can generate more electricity than customers can use. Battery energy storage allows PG&E and other utilities to store excess solar or wind power for use later.

PG&E operates 183 MW of utility-owned battery storage and has contracts for more than 3,500 MW of battery energy storage capacity being deployed throughout California over the next several years. Of that, more than 2,100 MW has already been connected to PG&E’s electric grid, including several facilities commissioned in 2023:

169 MW Edwards Sanborn Energy Storage (Kern County)
132 MW North Central Valley Energy Storage (San Joaquin County)
46 MW Daggett Solar 3 and 15 MW Daggett Solar 3 (San Bernardino County)
25 MW Cascade Energy Storage (San Joaquin County)
350 MW Vistra Moss Landing Battery Energy Storage (Monterey County)

Measuring progress

In 2023, PG&E supplied 100% greenhouse gas-free electricity to residential and business customers to whom we directly sell power, with 33% coming from RPS-eligible sources, including solar, wind, small hydroelectric, geothermal, and various forms of biopower. PG&E retail customers also received 53% of their electric deliveries from carbon-free nuclear power generated by Diablo Canyon Power Plant, and 14% from large hydroelectric power.

The chart below shows PG&E’s overall electricity supply mix for 2023, which included the electricity PG&E generated and procured as a percent of retail sales.

PG&E’s 2023 electric power mix delivered to retail customers

Percent of Bundled Retail Sales (Power Content Label)¹

¹ This chart uses the data and methodology from the CEC’s Power Source Disclosure Report. This methodology differs from the CPUC’s method to determine renewable energy percentages for RPS compliance.

Composition of PG&E’s 2023 total eligible renewable resources¹

Percent of bundled retail sales (Power content label)

Total: 33%

¹Eligible renewable resources include geothermal facilities, hydroelectric facilities with a capacity rating of 30 MW or less, biomass and biogas, selected municipal solid waste facilities, photovoltaic, solar thermal, wind facilities, ocean thermal, tidal current, and wave energy generation technologies. These figures are preliminary and will not be finalized until verified by the CEC.

The Utility expects its electricity mix to change significantly in future years due to Diablo Canyon Power Plant’s generation being allocated to all California utilities beginning in 2024 (Unit 1) and 2025 (Units 1 and 2) and strategies to manage customer affordability, including the sale and allocation of our RPS portfolio to departed load and the use of our banked RPS credits. Our voluntary goal continues to be to deliver 70% RPS clean electricity by 2030, compared to a state mandate of 60%.

Sustainability Highlight

The majority of PG&E’s renewable energy comes from contracts with third-party developers. In 2023, PG&E’s RPS-eligible portfolio included 260 contracts for more than 6,000 MW of renewable energy capacity. PG&E also has 48 utility-owned RPS-eligible generation facilities representing 423 MW of additional capacity.

PG&E’s 2023 RPS Resources

RPS-Eligible Active Contracts¹

RPS-Eligible Utility-Owned Generation (UOG)

Includes new RPS procurement through the RPS, Renewable Auction Mechanism (RAM), RAM for PV Program, PV Request for Offers, Qualified Facilities, Renewable Energy Market Adjusting Tariff, Bioenergy Market Adjusting Tariff, Green Tariff Shared Renewables, Disadvantaged Communities Green Tariff, other procurement CPUC-directives, and renewable energy credit transactions.
Includes one RPS eligible hydroelectric generation facility certified as incremental hydroelectric (MW total only includes incremental portion).

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Renewable energy & storage