Base Power leases the batteries to homeowners, who pay between $695 and $995 upfront to install 25 kilowatt-hour or 50 kilowatt-hour batteries, both of which dwarf the competition. (For instance, the 25-kilowatt battery doubles a single Tesla Powerwall.) The batteries can keep a household powered for as long as 48 hours, according to the company.
Battery energy storage is rapidly transforming the U.S. power landscape. In 2025, utility-scale battery storage is projected to expand by a record 18.2 GW, following a historic 10.3 GW added in 2024. These systems play a crucial role in balancing supply and demand, enhancing grid stability, and supporting the integration of renewable energy.
In exchange for the low upfront cost, Base Power customers agree to allow the company to use the batteries to sell electricity back to the grid when they don't need them for backup power. In addition to expansion beyond Texas, the company is also planning to build a second battery factory in the United States.
The Morro Bay Battery Energy Storage System (BESS) is a proposed 600 MW / 2,400 MWh facility on 43 acres of the former Morro Bay Power Plant site in California. Developed by Texas-based Vistra Energy, the project aims to repurpose an inactive coastal power station into one of the largest standalone battery storage projects in the state.
New Zealand's Contact Energy has announced plans to build a 100-megawatt (MW) grid-scale battery at Glenbrook, near Auckland, New Zealand, powered by Tesla Megapacks. This project is set to cost up to NZD$163 million (C$133 million) and is expected to be operational by the first quarter of 2026.
In South Auckland, Contact has a contract with Tesla to build the 100MW battery. The $163m grid-scale battery will be built in Glenbrook and will be the country's newest large-scale battery, the closest to the largest city, and Tesla's first Megapack 2 XL system in New Zealand.
In announcing the project, Contact Energy said they also had consent to operate and maintain a 100 MW Battery Energy Storage System (BESS) at East Rd (State Highway 45) Stratford. The consent was granted in November 2022.
Stratford's power station could be next on the list to get a massive 100-megawatt battery project to store excess renewable energy. Yesterday, Contact Energy announced plans to build a $163 million 100MW battery station in south Auckland that would provide enough electricity to meet peak demand over winter for 44,000 homes for over two hours.
NYSERDA President and CEO Doreen M. Harris said, “The possibilities created by innovative energy storage solutions can safely deliver more reliable electricity to New York communities as part of building an affordable and resilient zero-emission future.
Storage will increase the resilience and efficiency of New York's grid, which will be 100% carbon-free electricity by 2040. Additionally, energy storage can stabilize supply during peak electric usage and help keep critical systems online during an outage. All of this while creating an industry that could employ at least 30,000 New Yorkers by 2030.
New York State has some of the most rigorous safety standards for energy storage projects in the country, reinforced by independent nationally recognized experts to ensure full compliance.
NY-BEST Executive Director Dr. William Acker said, “Long Duration Energy Storage and other innovative energy storage technologies will provide critical services to the electrical grid supporting reliability, infrastructure efficiency reducing cost, and enabling our clean energy goals.
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