Lunar Energy Secures $232 Million to Grow Home Battery and Power Software Business

Mountain View, California — Lunar Energy, a company that builds home battery systems and software to combine many batteries into virtual power plants (VPPs), has raised $232 million in new funding to expand its products and technology. The investment came from two funding rounds, including a $102 million Series D led by B Capital and Prelude Ventures and a previously undisclosed $130 million Series C led by Activate Capital.

The company plans to use the capital to broaden both its hardware and software offerings and to scale its AI-driven platform, Lunar Gridshare, which helps manage distributed energy resources and VPP programmes currently operating in the United States. Lunar Gridshare aggregates residential battery systems and helps balance supply and demand on the grid, allowing homeowners and utilities to benefit from stored clean energy.

Lunar Energy has deployed its systems to manage about 650 MW of distributed energy assets and works with major partners such as solar and battery provider Sunrun, which uses the Gridshare platform in several U.S. regions including New England, Hawaii and Puerto Rico. The software is also being used by community energy organisations and utility partners in Europe and Asia.

According to the company, homeowners participating in VPP programmes have seen financial benefits, with average earnings of roughly $464 per customer, and additional savings compared with standard battery usage. Investors in the funding rounds also included DCVC, Piva Capital, Leitmotif, Itochu Corporation and Q Capital Partners.

The fresh investment reflects continued interest in energy storage technologies, even as total corporate funding in the sector declined in 2025. Venture capital investment in storage specifically grew by about 30 per cent, showing that investors remain committed to supporting technologies that help integrate clean energy and enhance grid flexibility.