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States adopt rules treating customer batteries and solar as grid power plants

States adopt rules treating customer batteries and solar as grid power plants

Rule Changes

Pew analysis documents distributed-energy shift across twelve states and Puerto Rico as electricity rates climb

April 28th, 2026: Pew releases distributed-energy roadmap

Overview

For most of the twentieth century the U.S. power grid moved electricity in one direction: from large central plants to homes and businesses. A Pew Charitable Trusts report released April 28 documents how twelve states and Puerto Rico have now written rules letting aggregated rooftops, batteries, water heaters, and thermostats be dispatched together as a single power plant. The category is called a virtual power plant, or VPP, and for the first time, it's moving from utility pilots into mainstream state regulation.

The shift comes as U.S. retail electricity rates rose more than 6% nationally in the year ending December 2025. Forecast demand from data centers, domestic manufacturing, and electrification outpaces what new transmission and gas plants can deliver.

The U.S. Department of Energy estimates VPPs could supply between 10% and 20% of national peak demand by 2030, at roughly 40% to 60% of the cost of building new generation and wires. Pew's report frames the question now in front of state regulators not as whether to use customer-sited resources, but how fast to scale them.

Why it matters

If states scale virtual power plants on the trajectory federal forecasters expect, customer-owned batteries and solar could absorb roughly a fifth of peak demand by 2030. That's 40% to 60% of what new generation and wires would cost—blunting future rate hikes.

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Key Indicators

12+1
States and territories with VPP policies
Twelve U.S. states plus Puerto Rico have enacted rules enabling virtual power plants, per Pew's policy explorer.
6%+
Annual retail rate increase
U.S. retail electricity prices rose more than 6% in the year ending December 2025, with double-digit growth in some regions.
78%
Projected demand growth 2023-2050
Total U.S. electricity demand is forecast to grow 78% by 2050, driven by data centers, factories, and electrification.
217 GW
Projected DER additions 2024-2028
Distributed energy additions over five years equal the total capacity of all U.S. coal-fired power plants.
40-60%
VPP cost vs new generation
Department of Energy estimates VPPs deliver peak capacity at 40% to 60% of the cost of traditional alternatives.
$1.1T
Investor-owned utility grid spend 2025-2029
Planned five-year capital spending by U.S. investor-owned utilities on grid upgrades.

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People Involved

Laura Lightbody
Laura Lightbody
Leading Pew's distributed-energy policy program

Organizations Involved

The Pew Charitable Trusts
The Pew Charitable Trusts
Nonprofit research and policy organization
Author of distributed-energy roadmap and State Policy Explorer

Independent research and public policy organization whose Energy Modernization project tracks state-level distributed-energy rules and advises regulators.
U.S. Department of Energy
U.S. Department of Energy
Federal Agency
Federal projection authority for VPP capacity

Cabinet-level department whose 2023 'Pathways to Commercial Liftoff' analysis set the federal benchmark projecting VPPs could supply 10-20% of U.S. peak demand by 2030.
LUMA Energy
LUMA Energy
Electric grid operator
Operates Puerto Rico's transmission and distribution system

Private operator that runs Puerto Rico's transmission and distribution grid under contract and administers the Customer Battery Energy Sharing program, the largest residential VPP in the United States.
North Carolina Clean Energy Technology Center
North Carolina Clean Energy Technology Center
University research center
Pew's data partner on the DER State Policy Explorer

Research center at North Carolina State University that maintains the DSIRE database of state energy incentives and partnered with Pew to assemble the 400-plus-entry DER policy dataset.

Timeline

January 2021 April 2026

11 events Latest: April 28th, 2026 · 1 month ago Showing 8 of 11
Tap a bar to jump to that date

  1. Pew releases distributed-energy roadmap

    Latest Report

    Pew publishes its distributed-energy report documenting twelve states plus Puerto Rico with VPP policies and issuing six recommendations to state regulators.

  2. California Senate Energy Committee advances SB 913

    Legislation

    The California Senate Committee on Energy, Utilities and Commerce voted to advance SB 913 (Clean Local Power Act), sponsored by Senator Josh Becker, which would require the CPUC to let aggregators bid home batteries and other distributed devices into the state's Resource Adequacy program; the bill was re-referred to Appropriations.

  3. Oregon VPP bill dies in 2026 session

    Legislative

    Oregon SB 1582, which would have expanded community-based virtual power plant programs, failed to pass during the state's 2026 regular session after utility opposition, leaving Oregon without a new VPP mandate.

  4. Pew launches DER State Policy Explorer

    Tool Launch

    Pew and NCCETC release an interactive database of more than 400 distributed-energy laws enacted in 2021-2025, organized for use by state regulators.

  5. Retail electricity rates jump 6%+ year-over-year

    Market Data

    U.S. average retail electric rates show more than 6% growth over the prior twelve months, with some regions in double digits, intensifying pressure on regulators.

  6. Puerto Rico VPP prevents blackout

    Operational Event

    CBES batteries discharge 48 megawatts simultaneously during a summer demand peak, averting a rolling blackout on the island.

  7. Colorado sets VPP capacity target

    Legislation

    Colorado S.B. 24-218 establishes a virtual power plant target of approximately 125 megawatts by 2031 and aligns utility planning with DER deployment.

  8. Puerto Rico launches battery sharing program

    Program Launch

    LUMA Energy launches the Customer Battery Energy Sharing program, enabling aggregation of residential solar-plus-storage systems for grid services.

  9. DOE publishes VPP 'Liftoff' analysis

    Federal Analysis

    Department of Energy report estimates VPPs could meet 10% to 20% of national peak demand by 2030 at 40% to 60% the cost of new generation and transmission.

  10. Virginia mandates 450 MW VPP pilot

    Legislation

    Virginia H.B. 2346 directs the state utility to pilot a virtual power plant program of up to 450 megawatts using both utility- and customer-owned distributed resources.

  11. Modern state DER policy era begins

    Policy

    Pew's policy explorer marks 2021 as the start of a wave of state action on distributed energy resources, with 400-plus laws enacted over the next five years.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

November 1978

Public Utility Regulatory Policies Act (1978)

Congress passed PURPA in response to the 1970s energy crisis, requiring utilities to buy power from non-utility 'qualifying facilities' at avoided cost. The law for the first time legalized independent power producers and broke the assumption that only vertically integrated utilities could generate electricity.

Then

PURPA created a market for cogeneration and small renewable projects, particularly in California, where wind farms and small hydro proliferated through the 1980s.

Now

It became the legal foundation for every subsequent expansion of non-utility generation, including independent power producers, merchant generators, and ultimately the wholesale market restructuring of the 1990s.

Why this matters now

VPP rules extend the same principle PURPA established—that the grid can buy power from entities other than the utility itself—down to the level of individual customers' batteries and solar arrays.

February 2021

Texas grid failure during Winter Storm Uri (February 2021)

A multi-day cold snap drove electricity demand to record levels while freezing gas wellheads, wind turbines, and a nuclear plant. ERCOT shed firm load for days; at least 246 people died and damages exceeded $130 billion.

Then

Texas legislators passed weatherization mandates and reformed market rules; ERCOT's CEO and several PUC commissioners resigned.

Now

The failure became a recurring reference point for grid planners and accelerated investment in distributed resources, behind-the-meter batteries, and demand response as resilience tools across multiple states.

Why this matters now

Uri made the fragility of centralized generation a household concern and pushed state regulators to treat customer-sited resources as resilience infrastructure—an argument the Pew report builds on directly.

April 2023

California NEM 3.0 net-metering reform (April 2023)

The California Public Utilities Commission cut compensation for new rooftop solar exports by roughly 75%, replacing retail-rate net metering with an avoided-cost framework that strongly favored pairing solar with batteries.

Then

Standalone rooftop solar installations dropped sharply across California while solar-plus-storage installations grew, reshaping the residential market.

Now

NEM 3.0 became the test case for how regulators value distributed resources and exposed the political stakes of compensation design—the same questions every state adopting VPP rules must now answer.

Why this matters now

It shows that VPP rules are inseparable from compensation design: how regulators price exports and capacity determines whether distributed energy scales as Pew envisions or stalls under disputed economics.

Sources

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+7
The Pew Charitable Trusts U.S. Department of Energy Utility Dive LUMA Energy CA Solar & Storage Association Electrek Climate Solutions The Pew Charitable Trusts The Pew Charitable Trusts The Pew Charitable Trusts Utility Dive Utility Dive Utility Dive