This memo documents the breadth and depth of participation in the Demand Side Grid Support (DSGS) program under Options 3 and 4, broken down by California State Senate district, Assembly district, and county. The data demonstrates that DSGS has achieved remarkable geographic reach and scale, with more than 203,000 sites enrolled during the 2025 program year, providing over 1 GW (1,000,000 kW) of clean, dispatchable capacity across the state. The accompanying maps and tables show where this capacity is located and which legislators represent the communities benefiting most from the program. This report draws on official participation data from the California Energy Commission and cross-references county-level income data from Lawrence Berkeley National Laboratory’s Residential Solar-Adopter Income and Demographic Trends report (2024 Update) to estimate the equity dimensions of program participation.

Author: Leah C. Stokes