Overall, clean energy saved the grid more than $2 billion during Winter Storm Fern. Wholesale electricity markets with significant wind, solar, and energy storage representation saw lower electricity prices than those without.

Even regions with modest clean power use saw substantial savings across electricity operating costs:

• In the PJM Interconnection (PJM), just a 5% share of wind and solar generation saved their grid $430 million. PJM serves 67 million customers across D.C., Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, and West Virginia.
• New York and New England (NYISO and ISONE) each saved over $60 million with about a 6% share of clean energy, serving a combined total of 27 million customers.
• In the Midcontinent Independent System Operator (MISO), the Midwest saved over $1 billion with a 16% share of wind and solar energy, serving 45 million
  customers.
• In the Electric Reliability Council of Texas (ERCOT), Texans saved over $200 million with a 24% share of wind, solar, and storage, serving 27 million customers.
• In the Southwest Power Pool (SPP), the Great Plains grid saved roughly $400 million with a 31% share of wind and solar energy, serving 19 million people.

Resource updated 4/6/2026

Delivered quarterly, the US Energy Storage Monitor from the �����Ƶ Association (ACP) and Wood Mackenzie Power & Renewables provides the clean power industry with exclusive insights through comprehensive research on energy storage markets, deployments, policies, regulations and financing in the United States.

The U.S. energy storage market hit a record 18.9 gigawatts of battery energy storage system installations in 2025, a 52% increase over 2024, according to the latest U.S. Energy Storage Monitor report released today by the �����Ƶ Association (ACP) and Wood Mackenzie.

In a year of record growth, Q4 of 2025 closed with the strongest quarterly totals on record with 5.8 GW installed. Utility scale installations accounted for 4.9 GW of the Q4 total, a 31% increase over the previous year. New activity was spread across 13 different states, demonstrating market diversification outside of California and Texas, which have historically dominated utility-scale battery energy storage deployment.

Report Highlights

More Resources

• :��The executive summary is complementary to ACP members and the public.����
• PowerCast: ACP members can watch the��PowerCast��led by the report authors to dive deeper into the findings.
• Other 2025 reports:��
  • Clean Power Quarterly Market Report Q4 2025��

Pricing List

Get the data needed to support your business by purchasing the report.

ACP Members get discounted access to the full report using a code found in an email on June 25 or March 19 from membership@cleanpower.org. For access to the ACP member coupon code, please email this address.

Not an ACP member? Join now.��

To redeem the yearly subscription, please contact Wood Mackenzie.��

About the U.S. Energy Storage Monitor��

The US Energy Storage Monitor is offered quarterly in two versions – the executive summary and the full report.

• The is complimentary to member companies and provides a bird’s eye view of the U.S. energy storage market and the trends shaping it.
• In contrast, the features state-by-state breakdowns and analysis on storage deployments, growth forecasts, policies helping or hindering growth, financing trends, and market strategies. It is available individually each quarter or as part of an annual subscription.��

About Wood Mackenzie Power & Renewables��

Wood Mackenzie, a Verisk Analytics business, is a trusted source of commercial intelligence for the world’s natural resources sector. We empower clients to make better strategic decisions, providing objective analysis and advice on assets, companies and markets. For more information, visit:  or follow on Twitter .��

This page was last updated March 24, 2026

Developers brought 18.6 gigawatts (GW) of new utility-scale solar, wind, and energy storage online in Q4 alone — pushing the 2025 annual total to more than 50 GW. That’s enough electricity to power more than 6.9 million homes.

These three technologies accounted for 90.5% of all new power capacity in 2025 and over 80% of capacity additions over the previous five years, according to ACP and the U.S. Energy Information Administration. These numbers were expected given the strong policy tailwinds of 2024, but future growth remains uncertain as federal policy chaos leads to investor hesitation.

Key Highlights

• Strongest Clean Power Year on Record: Total clean power capacity installed in 2025 reached 50,344 MW — a 3% increase over 2024 and the first-time annual deployment has surpassed 50 GW.
• Storage Surges: Energy storage installations were 41% higher than 2024 — the previous record year. The storage development pipeline continues to expand, growing 2% year-over-year.
• Medium-term Pipeline Outlook Increasingly Uncertain: The near-term pipeline rose to 187,514 MW. However, growth is slowing with only two GW added during the fourth quarter. A 27% year-over-year drop in PPA announcements is an early warning sign.
• Offshore Wind Under Pressure: No new offshore wind capacity came online in Q4, and the pipeline contracted following project cancellations, including Invenergy’s petition to terminate its OREC agreement for Leading Light Wind.
• Value Proposition for States: Nineteen states grew their clean power capacity by more than 20% in 2025, with Kentucky increasing its capacity by 188% to reach the Top 10 for 2025 solar installations. Increased adoption is set to continue: 35 states have more than 1 GW of clean power in the pipeline.

Read the press release:��REPORT: Clean Power Adds Record 50 GW in 2025 As Surging Electricity Demand Accelerates

The��complete Q4 report��is also available to ACP Members.

Developers brought 18.6 gigawatts (GW) of new utility-scale solar, wind, and energy storage online in Q4 alone — pushing the 2025 annual total to more than 50 GW. That’s enough electricity to power more than 6.9 million homes.

These three technologies accounted for 90.5% of all new power capacity in 2025 and over 80% of capacity additions over the previous five years, according to ACP and the U.S. Energy Information Administration. These numbers were expected given the strong policy tailwinds of 2024, but future growth remains uncertain as federal policy chaos leads to investor hesitation.

Key Highlights

• Strongest Clean Power Year on Record: Total clean power capacity installed in 2025 reached 50,344 MW — a 3% increase over 2024 and the first-time annual deployment has surpassed 50 GW.
• Storage Surges: Energy storage installations were 41% higher than 2024 — the previous record year. The storage development pipeline continues to expand, growing 2% year-over-year, signaling sustained long-term demand.
• Medium-term Pipeline Outlook Increasingly Uncertain: The near-term pipeline rose to 187,514 MW. However, growth is slowing with only two GW added during the fourth quarter. A 27% year-over-year drop in PPA announcements is an early warning sign for lower clean power deployments in 2028-2030.
• Offshore Wind Under Pressure: No new offshore wind capacity came online in Q4, and the pipeline contracted following project cancellations, including Invenergy’s petition to terminate its OREC agreement for Leading Light Wind. Continued federal and regulatory interference is creating additional headwinds for the sector.
• Value Proposition for States: Clean power is delivering low-cost power, jobs, and a boost to local economies across the U.S. — with projects operational in all 50 states. Nineteen states grew their clean power capacity by more than 20% in 2025, with Kentucky increasing its capacity by 188% to reach the Top 10 for 2025 solar installations. Increased adoption is set to continue: 35 states have more than 1 GW of clean power in the pipeline.

Read the Report & More

Download the complete Q4 2025 Clean Power Quarterly Report for detailed state-by-state analysis, technology deep-dives, and comprehensive market data.

• ACP members:��Download the report and appendices at the buttons above.
• Summary version available to all: ��Download a free summary
• Read the press release: REPORT: Clean Power Adds Record 50 GW in 2025 As Surging Electricity Demand Accelerates

There is a growing mismatch between demand growth and new conventional generation that presents an immediate challenge to grid reliability and affordability across the PJM region. To evaluate system-wide impacts, ACP modeled PJM under two scenarios: a��base case, where all generation resources are available, and a no clean power case, where no��new��wind, solar, or storage projects are added beyond those already under construction or required by law.��

Key Data Points:����

• Without new clean energy development, ACP estimates that ratepayers across nine PJM states would pay an��additional��$360 billion��over the next ten years, driven primarily by higher wholesale electricity prices.����
• The average residential household would see��$3,000 to $8,500��in��additional��electricity costs over the��next��decade.������
• In the “no new clean power” case, PJM becomes increasingly reliant on aging, higher-cost fossil fuel generation and imported electricity. Net power imports rise nearly 300% by 2035, increasing exposure to fuel price volatility and operating hours with extremely high electricity prices.��

State Reports:

Download The Cost of No New Clean Power fact sheet for specific states from the list below.

• Delaware
• Illinois
• Maryland
• New Jersey
• Ohio
• Pennsylvania
• Virginia
• Washington, D.C.
• West Virginia

Resource added March 23, 2026

In its analysis, ACP evaluated the impact of removing the five offshore wind projects from the system. The results were then translated into expected retail electricity rates across��15 states and Washington, D.C.��

Offshore wind plays a critical role shifting the “marginal unit” — the last and most expensive generator needed to meet demand — away from high-cost peaking plants toward more efficient and predictable��generation.��

Key findings��from the analysis��show that without these projects:����

• Wholesale electricity prices��would��rise significantly during evening peaks��and��winter hours –��including intense winter storms like Fern��

• Power systems would��rely more heavily on��non-renewable sources and leave customers more exposed to price��volatility��

• Grids would��lose access to low-cost, winter-peaking clean energy that helps stabilize prices during periods of high demand��