Southern California Edison residential VPP economics

SCE serves most of Southern California outside the city of Los Angeles, which has its own municipal utility. Since 2015, cities and counties in SCE territory have formed community choice aggregators (CCAs) that buy electricity for their residents. SCE still delivers it, reads the meter and sends the bill. Twelve CCAs serve load in SCE territory in 2026, and Clean Power Alliance is by far the largest, with a 2026 forecast of about 11,000 GWh (CPUC) and about 1.07 million customer accounts across 38 member jurisdictions (Clean Power Alliance).

For a battery, that split matters in three places. The delivery side of the time-of-use price comes from SCE and the California Public Utilities Commission (CPUC). The generation side comes from SCE for bundled customers or from the CCA for everyone else, which is why the same rate name can carry a different peak price. Demand response, the Solar Billing Plan and interconnection stay with SCE, while rebates and some programs can come from either.

Clean Power Alliance’s offers show how much a CCA can add. Its Sun Storage Rebate rose from $750 to $2,000 for applications from September 1, 2026, with a $1,250 Reliability+ adder for homes in areas often hit by Public Safety Power Shutoffs (PSPS) and $250 for medical baseline or income-qualified customers, up to $3,500; it has accepted more than 1,200 batteries and requires no dispatch enrollment (Clean Power Alliance). Its time-of-use generation prices also differ from SCE’s: CPA lists TOU-D-PRIME at about 67¢ on peak and 29¢ off peak (Clean Power Alliance).

The Reliability+ adder is a reminder that backup power has a price here. SCE called 14 PSPS events in 2025 (SCE), and the January 2025 wind event alone cut power to about 363,000 customers (SCE). None of the bill-savings figures below include outage value.

Every utility deep dive on this site follows the same template, but each has one feature that changes how its economics read. For SCE it is the move from device programs to a whole-home program. Today each device has its own program, its own sign-up and often its own vendor. A household with a thermostat, a heat pump water heater, an EV and a battery would deal with four sets of rules.

The Behind-the-Meter Optimization of Load Technologies (BOLT) study tests the alternative. In SCE’s words, its programs have “operated on a one-to-one tariff model,” and BOLT tries “a one-to-many framework” (SCE filing). One enrollment covers a battery (up to $400), an EV (up to $125) and a smart thermostat (up to $100, only alongside an EV or battery), paid in two stages, through EnergyHub, Octopus or Uplight/Optiwatt (SCE, EnergyHub terms). Octopus says a household with all three can earn $625 (Octopus).

The early results are the most useful part. By the end of 2025, vendors reported 826 batteries, 625 EVs and 130 thermostats, and dispatch-eligible devices grew from 173 to 1,581 between the first and last events. SCE found batteries were “the primary driver of measurable load reduction,” while EVs and thermostats showed “near-zero attributable reductions” in the 4–9 p.m. window, because most EV charging already happens off peak (SCE). SCE now calls the design “battery-first,” with EVs managed overnight and thermostats making small daily adjustments.

That is the multi-asset lesson in its plainest form. Adding devices to a home adds enrollment and data, but on a time-of-use rate that already moves EV charging out of the peak, the extra kilowatts come mostly from the battery. The devices that add value alongside the battery are the ones that make it cheaper to fill, which at an SCE address means solar.

The battery brings about $1,460 of the home’s $1,670 a year, and almost all of that is bill savings rather than program pay. The heat pump appears only indirectly: owning one, an EV or a battery qualifies the home for TOU-D-PRIME, which has the lowest off-peak prices of SCE’s residential plans (SCE).

Batteries are the most valuable single asset in nearly every program we cover, but VPP growth at scale depends on several assets working together at one site. Solar alone does little for a 7 p.m. peak. A battery charged from midday solar should, in principle, be charged for free.

Whether it is free depends on what the export would have earned. Storing a kWh gives up the export credit, loses about 10% in the round trip, and avoids buying a kWh in the evening. SCE’s Solar Billing Plan credits exports hourly from the CPUC’s avoided cost calculator; for 2026 starts, SCE’s averages are about 6¢ on summer days, 21¢ on summer evenings and 3¢ on winter days (SCE), plus a 1.6¢ bonus credit fixed for nine years (Cali Energy). New solar customers must take TOU-D-PRIME (SCE).

SCE sits at the far end of the chart with PG&E. Each stored kWh keeps about 53¢ of the 61¢ peak price. That is why the solar home earns about $1,340 a year against $671 for a battery charged from the grid at TOU-D-PRIME’s 26¢ off-peak price. In Massachusetts, where net metering credits exports near retail, the same battery gains little from solar. In SCE territory, solar is what makes the battery case.

A battery added to an SCE solar home pays back in about 10.2 yr at Los Angeles prices, and in about 8.7 yr with Clean Power Alliance’s rebate. Without solar it takes about 20.3 yr, beyond most warranties. The same address can land on either side of ten years depending on solar and CCA membership, and neither depends on a demand response check.

Financing in SCE territory turns on the federal credit. A homeowner who buys a battery in 2026 gets no residential tax credit, while a leasing company can still claim the commercial credit on the same hardware. That gap favors third-party ownership. Under a lease, the household keeps the bill savings, about $1,340 a year in our example, and the company keeps the credit.

Related: the PG&E residential deep dive for the Northern California version of the Solar Billing Plan, the time-of-use money trail for an SCE example, the DSGS heat wave case study, the Mass Save residential deep dive for a net metering contrast, and the SCE C&I deep dive. To run other equipment, use the Residential VPP Calculator.