Lunar Energy has closed a $450 million Series C financing round as it looks to scale its residential battery storage business. The startup’s latest fundraising values the company at $3.2 billion post-money, underscoring investor interest in home energy storage as households seek more reliable and flexible power options.

The round was led by Andreessen Horowitz, with participation from existing backers including Breakthrough Energy Ventures. The new capital is expected to support Lunar Energy’s growth plans, including broader deployment of its battery systems and continued product development.

Residential storage has become an increasingly important part of the clean-energy market, especially in regions facing grid strain, rising electricity costs, and stronger demand for backup power during outages. Lunar Energy is positioning itself to capture that demand as it scales its offerings.

The financing comes amid sustained venture interest in energy technology companies that can help consumers manage power use more efficiently. For Lunar Energy, the raise provides fresh resources to compete in a market where reliability, cost, and ease of installation remain key selling points.