Portland General Electric residential battery and VPP economics

Portland General Electric (PGE) serves about 950,000 customers in and around Portland and Salem. It is not PG&E, the California utility, which has its own deep dive. PGE already runs one of the larger utility flexible-load portfolios in the country: about 600 MW from more than 230,000 customers, with more than 950 MW proposed by the end of 2028 and a goal of meeting 25% of peak demand with distributed resources by 2030, according to PGE’s flexible load plan. Most of that is thermostats, rates and business demand response; residential batteries are a small slice, about 8 MW of nameplate in 2024.

Oregon splits the money the way New York does. PGE pays for performance through events and rates. Energy Trust of Oregon, an independent nonprofit funded by a public purpose charge on PGE, Pacific Power and gas utility bills, pays the upfront incentives, much as NYSERDA does in New York. Unlike NYSERDA’s storage incentive, Energy Trust’s battery money is tied to solar, not to enrollment in a utility program.

Why the Smart Battery pilot pays less than it used to. PGE launched it in 2020 at $40 a month, according to PGE’s announcement, about $480 a year. The current design pays per kWh delivered, which ties pay to performance but cuts the yearly total by more than half for a typical battery.

Why the rate matters more. PGE’s 5–9 p.m. price is nearly five times the overnight price, and the battery can capture that spread every weekday, not just on 12 event days. The Time of Day guarantee lowers the risk of switching in the first year.

Stacking needs care, depending on M&V methodology. Smart Battery measures the battery’s own discharge, so daily Time of Day cycling does not shrink event pay as long as the battery is charged when an event starts. Peak Time Rebates measure the whole home against a 10-day baseline, which a battery that discharges every evening already lowers.

The best standard path covers about 64% of the battery’s cost in 10 years, and the income-qualified path about 71%. Without the Time of Day rate, the Energy Trust incentive plus Smart Battery pay covers only about 38%. A household that cannot get into the pilot still recovers most of the bill value from the rate alone.

PGE runs a separate program for each kind of equipment rather than one umbrella brand: Smart Battery for batteries, the Smart Thermostat Program for heating and cooling, Smart Charging for EVs and Smart Water Heater Rewards in its Smart Grid Test Bed neighborhoods. Peak Time Rebates sits across all of them as a whole-home alternative. Energy Trust’s upfront money covers solar, batteries and heat pumps but not EV chargers, which PGE rebates itself.

Consider a hypothetical PGE home in northeast Portland with rooftop solar. It adds a 13.5 kWh Tesla Powerwall 3, drives a Tesla Model Y 12,000 miles a year on a ChargePoint Home Flex Level 2 charger, and uses a Google Nest Learning Thermostat to control a 3-ton ducted heat pump. Our Residential VPP Calculator puts the home’s program pay at $3,090 over 10 years, about $309 a year, from 4.5 kW of flexible power.

The Smart Battery pilot earns $2,015 of that, after 2% yearly capacity fade, the EV $550 and the thermostat $525, which pays in both seasons because a heat pump heats and cools. Switching to Time of Day adds an estimated $5,000 of bill savings from the battery over the same 10 years, more than all three programs combined. The heat pump itself earns no VPP pay; its support is the Energy Trust incentive of up to $1,000 at purchase.

Each path below ends with the household owning the battery, so the 10-year totals compare like with like. The lease has no money down and a low monthly payment, because the leasing company claims the 30% federal credit and the Energy Trust incentive. The household still pays a buyout of about $3,810 to keep the battery at the end of the term.

Related: the hosted battery money trail, the National Grid residential deep dive, the Xcel Energy residential deep dive and the Portland General Electric C&I deep dive.