Distributed batteries on the grid are moving from a niche home-backup product into appliances, businesses and street-level equipment. The pitch is straightforward: a battery installed near where electricity is used can serve a customer, then potentially join thousands of others in a coordinated response when the power system is under strain.
That potential is conditional. Batteries that are easy to install are not automatically useful to a utility, and a single household device will not change a regional grid. Operators need visibility, control arrangements and a way to pay customers or intermediaries for a response at the time and place it is needed.
How can distributed batteries help the grid?
A distributed battery is a storage device located at or near a customer rather than at a dedicated utility-scale site. It may sit in a home or business, or be built into equipment such as an induction stove. It charges when electricity demand is lower or generation is plentiful, then can discharge later during a peak or other grid-stress period.
The useful unit is the fleet. An aggregator or utility can coordinate many enrolled devices as a larger resource, reducing demand or supplying stored electricity together. A December 2024 DOE-sponsored report says distribution-targeted resources can help manage growing electrification and load constraints, while potentially deferring costly upgrades to local grid equipment. The report describes programs aimed at constrained areas such as a substation, feeder or section of a feeder.
For customers, the immediate benefit can be more concrete than grid services: backup power, lower electricity use at expensive times, or avoiding some building electrical work. Those benefits are separate from proving that the battery fleet can deliver a grid service when called.
Where are smaller batteries being deployed?
MIT Technology Review reported examples in New York City, where large storage projects can face difficult permitting and regulatory processes. PopWheels, which operates an e-bike battery-swapping network, said it had about 50 cabinets in the city and roughly 2,500 batteries in circulation. The company has also begun supplying food-cart operators with batteries intended to replace gasoline generators. It says four batteries provide about five kilowatt-hours, roughly enough for a day of operation for many carts.
Copper builds induction stoves with integrated batteries. Its cofounder and chief executive, Sam Calisch, said the battery can keep the stove operating in an outage and supply part of its demand during cooking, which may avoid some electrical upgrades. Every Electric sells a battery designed to plug into an air-conditioning unit and says it pays customers to reduce use at high-stress times. David Energy uses a similar model for commercial sites including laundromats, parking garages and gyms, according to MIT Technology Review.
These are company deployments and claims, not evidence that each device is providing a verified grid service. Copper's estimate that batteries in every U.S. stove could amount to tens of gigawatts is also a hypothetical from Calisch, not an independent forecast.
What has to change before small batteries scale?
DOE says utilities in 30 states, Washington, DC, and Puerto Rico are increasingly obtaining distributed-resource services through time-varying rates, tariffs, programs and procurements. Its report says projections suggest such services could grow threefold to 80 to 160 gigawatts over the next decade. That is a projection of potential DER services, not installed battery capacity or a guaranteed result.
Interconnection standards, compensation and rate design shape the economic value of distributed resources, according to the National Caucus of Environmental Legislators. The DOE report also says customers and aggregators need viable value propositions. Small or integrated products may avoid extensive processes in some cases, as MIT Technology Review reported, but the broader task still includes matching devices, programs and grid operations.
Distributed batteries do not remove the need for large storage projects. MIT Technology Review notes that utility-scale installations remain important for supporting variable wind and solar generation. The more plausible outcome is a mixed system: large batteries handling broader storage needs, with coordinated smaller devices helping where their location and timing are useful.
This story draws on original reporting from MIT Technology Review.
