What is Peak Shaving?

U.S. electricity demand is growing faster than it has in generations. The EIA forecasts electricity use will climb 1% in 2026 and 3% in 2027, the strongest four-year growth stretch since 2000, driven largely by data centers. Longer term, the National Electrical Manufacturers Association projects net U.S. electricity consumption will grow more than 55% by 2050, with data centers alone accounting for 38% of that growth through 2037. According to the Wall Street Journal, demand is arriving faster than the grid can be built out to meet it and the cost of catching up is landing on ratepayers.

As such peak shaving, long a niche cost-control tactic, is becoming one of the more important tools utilities, grid operators, and large energy users have for keeping the grid affordable and reliable.

 

In This Article

• What is Peak Shaving?
• Why Peak Shaving Matters in 2026
• How Peak Shaving Works
• Peak Shaving Strategies and Technologies
• Peak Shaving in Action: Recent Examples
• Benefits of Peak Shaving
• Frequently Asked Questions
• Glossary of Peak Shaving Terms

 

What is Peak Shaving?

Peak shaving is an energy management strategy designed to reduce or shift electricity use during hours of peak-demand, typically when prices are at their highest. Instead of spending trillions building costly new generation or transmission capacity to cover a handful of peak hours a year, peak shaving flattens the demand curve so existing infrastructure can carry more of the load.

It happens at nearly every scale:

• A commercial building discharging an on-site battery to avoid a demand charge
• A utility calling on thousands of residential smart thermostats during a heat wave
• A grid operator like ERCOT or PJM dispatching aggregated batteries and flexible loads to avoid a capacity shortfall

The grid is largely sized to meet the single highest hour of demand in a year. Shaving even a fraction off that peak can defer or eliminate the need for expensive infrastructure that would otherwise sit idle most of the year.

 

Why Peak Shaving Matters in 2026

A few forces are converging to make peak shaving both more urgent and more technically sophisticated than it’s ever been:

• Data center growth. Data center electricity consumption is projected to grow 300% over the next decade, per NEMA, concentrated in the mid-Atlantic and Texas.
• Steeper, more frequent peaks. Grid operators are logging back-to-back record winter and summer peaks as electrification accelerates, per the Federal Reserve Bank of Dallas.
• Peak shaving is showing up in rate cases. Utilities are now proposing battery and storage programs built explicitly to shift load off peak hours as an alternative to costlier infrastructure builds.
• Fixed strategies are showing their limits. Many storage systems still run on schedules built from historical load patterns, which is a poor match for facilities like data centers or manufacturers where demand can spike outside a predefined window.

Together, these trends are pushing peak shaving from a background cost-management tactic into a front-line grid-planning strategy.

How Peak Shaving Works

There are many ways to approach peak shaving, from demand flexibility programs like virtual power plants, demand response, EV managed charging, or BYOD programs, or through energy efficiency measures like time-of-use rates. Peak shaving strategies generally fall into a few categories:

• Load shedding: temporarily reducing or turning off non-essential equipment during a peak event
• Load shifting: moving flexible energy use, like EV charging, to off-peak hours
• On-site storage discharge — using batteries to cover load during a peak instead of drawing from the grid
• Demand response: reducing usage in response to a utility signal or price incentive
• Aggregated dispatch: coordinating many small resources into a single dispatchable asset, often called a virtual power plant (VPP)

Peak Shaving Strategies and Technologies

Battery Storage: From Fixed Schedules to Active Dispatch

Battery storage remains the most common entry point for peak shaving in commercial and industrial settings: charge when prices are low, discharge when they spike. Fortunately, adoption is accelerating! American Clean Power reported 18.9 GW of U.S. storage capacity installed in 2025, a 52% jump over 2024.

But fixed-schedule peak shaving has real limits. A manufacturing facility can see an unscheduled production ramp that creates a peak outside a preset discharge window; a data center can see load spike with compute demand in ways no static schedule anticipates. The industry is shifting toward active, or “techno-economic,” dispatch, batteries that respond to real-time load, pricing, and grid conditions rather than a fixed timer, so they don’t miss the very peak they were installed to shave.

 

Demand Response Programs

Demand response incentivizes customers to cut usage during peak events, whether that’s a factory scaling back non-critical equipment or a household pre-cooling before a heat wave. It remains one of the most cost-effective peak-shaving tools available, since it requires no new hardware, and it’s increasingly bundled with batteries, EVs, and smart thermostats inside broader VPP programs.

 

Virtual Power Plants

Virtual power plants aggregate distributed energy resources (DERs) like home batteries, smart thermostats, EVs into a single dispatchable asset. VPPs are already scaling quickly: RMI found more than 500 VPP programs already operating nationwide as of 2023, serving 30 to 60 GW of combined peak demand, with individual programs now rivaling the size of a traditional gas turbine. One study cited by SEIA found that 60 GW of national VPP capacity could save ratepayers between $15 billion and $35 billion in infrastructure costs over a decade.

 

EV Managed Charging

As EV adoption grows, shifting charging sessions away from peak hours becomes an increasingly significant lever for utilities managing both daily and seasonal peaks. In fact, many utilities have already found EV charging efficacious in shifting load. For example, the California Public Advocates reported that “mass shifting of peak EV load away from the peak could save between $5 billion and $18 billion in distribution costs by 2040,” while a recent Brattle report found that EV charging represents the single biggest opportunity for load flexibility in New York state.

 

Peak Shaving in Action: Recent Examples

• Texas (ERCOT): During a record winter peak of nearly 71 GW in February 2025, batteries supplied a record 4.5 GW; a July 2025 record summer peak saw batteries reach 7.1 GW, per the Federal Reserve Bank of Dallas.
• Pennsylvania (PECO): Proposed a residential battery-leasing pilot explicitly built for peak shaving, projecting more than $1,100 in value per participating customer over a 15-year battery lifespan.
• California (PG&E and Rewiring America): Announced a Google-backed VPP program in September 2026 to test the locational value of home batteries and smart devices across the Bay Area.

 

In Brief: Benefits of Peak Shaving

• Lower demand charges and energy costs for businesses and ratepayers
• Deferred or avoided spending on new generation, transmission, and distribution infrastructure
• Improved grid reliability during extreme weather and high-demand events
• Greater ability to integrate solar, wind, and other variable renewable resources
• Added site-level resilience during outages, when paired with storage

 

FAQs

Is peak shaving the same as demand response? Not exactly. Demand response is one tool used to shave peaks, typically by reducing usage in response to a utility signal. Peak shaving is the broader goal, achieved through demand response, battery storage, on-site generation, load shifting, or virtual power plants.

Does peak shaving require battery storage? No. Peak shaving can be achieved through simple load shifting or shedding, but batteries have become one of the most effective tools because they can discharge stored, lower-cost energy exactly when demand and prices peak.

Who benefits from peak shaving? Everyone connected to the grid, to some degree. Businesses reduce demand charges, utilities defer costly infrastructure upgrades, and ratepayers see lower overall system costs, since peak-driven spending is typically recovered through rates.

What’s the difference between peak shaving and a virtual power plant? Peak shaving is the objective; a virtual power plant is one method of achieving it at scale by aggregating smaller distributed resources into a single dispatchable resource.

 

Glossary of Peak Shaving Terms

• Peak shaving: Reducing or shifting electricity use during periods of highest demand.
• Demand response: A program that reduces electricity usage in response to a price signal or utility request during high-demand periods.
• Distributed energy resource (DER): A small-scale energy resource, such as rooftop solar, a battery, or a smart thermostat, located close to where electricity is used rather than at a centralized power plant.
• Virtual power plant (VPP): A network of aggregated distributed energy resources coordinated to act as a single, dispatchable resource.
• Demand charge: A fee utilities bill commercial and industrial customers based on their highest rate of electricity use during a billing period, rather than total consumption.
• Managed EV charging: Coordinating electric vehicle charging schedules to avoid peak demand periods.
• Techno-economic dispatch: Operating batteries or other flexible resources based on real-time pricing, load, and grid conditions rather than a fixed schedule.
• Net load: The electricity demand that remains after subtracting output from variable resources like wind and solar.
• Load shifting: Moving energy-intensive activities to off-peak hours rather than reducing total consumption.

 

The Bottom Line on Peak Shaving

Peak shaving isn’t a new idea, but the way it’s being deployed is changing fast. Static, schedule-based approaches are giving way to real-time, data-driven dispatch, and single-building battery projects are scaling into utility-grade virtual power plants serving thousands of customers at once. As data centers, electrification, and extreme weather keep pushing demand curves higher, peak shaving is shifting from a cost-saving tactic to a core piece of how the grid stays reliable and affordable.

This blog was originally published on June 28, 2023 with updates made on September 11, 2026.