Base Power Raises $1 Billion for Factory, Tops 100 Daily Installations
A Base Power battery has two jobs. Its 39.2 kilowatt-hours of storage can keep a customer’s home running during an outage, but the company also controls when the battery charges from or returns electricity to the grid. That dual-purpose model is now moving into a larger manufacturing phase: Base has raised $1 billion in Series D financing, says it is installing more than 100 systems per day and is building a second factory scheduled for completion in 2027.
The arrangement lowers the initial price of obtaining home backup power, but it differs fundamentally from buying a battery outright. Base retains ownership and operational control of the equipment. Customers pay no more than $695 for a standard installation and a $19 monthly membership fee; some prospective Illinois customers are being offered a $95 installation price. In exchange, the battery becomes part of Base’s electricity-service and wholesale-market operation rather than an asset managed solely by the homeowner.
One battery serves the home and the power market
Base says its control system charges batteries when wholesale electricity prices are low and discharges them when demand and prices rise. At the individual-home level, that means stored energy can provide backup when utility service is interrupted. Across many installations, the same hardware forms a distributed fleet whose charging and discharging can be coordinated as a grid resource.
This business model links hardware design, software controls, electricity retailing and field service. Base is not relying primarily on a high-margin equipment sale; revenue depends on operating company-owned batteries in power markets while maintaining the backup service promised to participating households. The company has more than 30,000 customers and offers one- or two-battery configurations.
The ownership structure is the central consumer tradeoff. A household can obtain substantial storage without paying the full purchase price of conventional backup equipment, while Base gains a long-lived grid asset installed at the customer’s property. The lower upfront charge therefore should not be read as a direct comparison with ownership: customers are purchasing access to backup power and electricity service, not acquiring unrestricted control of the battery itself.
Backup duration also has a practical boundary. The available information indicates that the system may not carry a home through an outage extending beyond two or three days. Actual endurance will necessarily depend on household demand and the installed configuration, so the 39.2-kilowatt-hour rating is more useful as an energy-capacity measure than as a universal promise of outage duration.
Manufacturing must keep pace with field deployment
Base says its installation rate has climbed from one system per day earlier in its development to more than 100 per day. That pace shifts the engineering challenge beyond battery production alone. Residential deployments require site assessment, electrical integration, permitting, trained installers and coordination with utilities or electricity suppliers. In Illinois, for example, availability is partly shaped by differing municipal permitting requirements.
The company opened Base Factory 1 in Austin earlier in 2026 and is constructing a larger second facility for completion in 2027. The new capital gives Base resources to expand manufacturing, but factory output and installation throughput must scale together. Producing batteries faster does not automatically eliminate local permitting, workforce or interconnection constraints.
Market structure is another limit on expansion. Base began in Texas and recently entered Illinois, where it received approval from the Illinois Commerce Commission to operate as an Alternative Retail Electric Supplier. It plans to add states through deregulated electricity markets or partnerships with monopoly utilities. An Austin Energy partnership illustrates the second route: the utility and Base have begun making backup batteries available to participating Austin homes.
Those pathways involve different commercial and regulatory interfaces. In a competitive retail market, Base can combine electricity supply with its battery service. In a vertically structured utility territory, expansion may depend more heavily on a utility partnership and an agreed role for the distributed battery fleet.
The $1 billion round, co-led by Ribbit Capital, Addition, Valor Equity Partners and JPMorgan Chase’s Strategic Investment Group, valued Base at $13 billion. For the underlying system, however, the more consequential numbers are 39.2 kilowatt-hours, more than 100 daily installations and a second U.S. factory targeted for 2027. Base’s next test is whether manufacturing, permitting, installation labor and grid-market access can scale at the same rate as its capital.
By Thomas Caldwell — AMI’s senior editor for mechanical and mobility engineering, covering vehicle electronics, systems integration, electrification, chassis systems, propulsion, and safety policy.
