NineDot Energy, a New York battery developer, held a ribbon-cutting in late September 2026 for a battery storage site in Hunts Point in the Bronx. The company rates the system at nearly 20 megawatts. It sits on the former site of a fuel oil trucking company, in a neighborhood that lives with heavy diesel truck traffic.
What a battery like this does
- It charges when grid power is cheaper and cleaner.
- It holds that energy until demand peaks.
- It discharges into the grid during those peak hours, which NineDot says can help retire gas-fired “peaker” plants.
Two high-emission peaker plants operate in nearby Port Morris, per Interesting Engineering. Whether this battery will displace their output isn’t shown in the reporting. That depends on how the grid operator dispatches it.
NineDot says the battery will supply about 20,000 homes during peak grid hours. Neither article explains how that number was calculated, and neither gives the system’s energy capacity in megawatt-hours. Without that figure, the homes number is a company estimate, not a measurement.
Timeline and track record
- July 1 to 4, 2026: NineDot says nine of its projects exported nearly 34 MW during peak hours in New York’s early July heat wave, which it compares to the demand of roughly 50,000 window air conditioners. These are company figures.
- September 25, 2026: Solar Builder describes the Hunts Point site as energized and fully operational.
- September 27, 2026: Interesting Engineering says it is not yet fully operational and should be ready for next summer’s heat waves.
- End of 2026: NineDot says it is on track for 400 MW in operation, construction, or development. It already operates 11 projects at six locations totaling 39 MW in Staten Island and the Bronx.
Why It Matters to You
- If you live in the Bronx or elsewhere in New York City, the battery is meant to help the grid through peak hours such as summer heat waves, once it’s fully running (sources disagree on whether that’s now or next summer).
- No source says it will lower your electric bill. That depends on how utilities and regulators account for storage.
- For Hunts Point residents, it replaces a fuel oil trucking site with equipment that produces no local exhaust. The area’s main pollution source in the reporting is still diesel trucks.
What the sources leave open
Status is the biggest gap, as the timeline shows: confirm with NineDot before relying on either account. The release also cites 2023 data showing asthma-related emergency room visits in Hunts Point and Mott Haven at two to three times the New York City average, per NineDot. That describes the neighborhood. It doesn’t show a battery will change those rates, and the sources give no health projection. Truck counts differ too: Interesting Engineering says more than 10,000 diesel trucks pass through the area daily, while Solar Builder says NineDot estimates about 10,000 pass through the borough daily. Neither source states the project’s cost or funding.
Quick answers
- Is the battery running now? Sources conflict. One says energized and operational as of late September. Another says it will be fully ready by next summer.
- Will it clean the air in Hunts Point? Not by itself. The batteries produce no local exhaust, but the main pollution source described is diesel truck traffic. NineDot says storage can help retire peaker plants over time.
- Will it lower my electric bill? None of the sources says so.
- How were the 20,000 homes calculated? The sources don’t say. It’s NineDot’s estimate of what the battery could supply during peak hours.
Sources
- Solar Builder: NineDot Energy cuts ribbon on Bronx energy storage site (Sep 25, 2026)
- Interesting Engineering: Bronx battery storage by NineDot (Sep 27, 2026)