Energy Storage

Energy storage, a child sector within Superscout's Energy category, encompasses the technologies that capture and store energy for later use, including lithium-ion batteries, solid-state batteries, flow batteries, compressed air, thermal storage, hydrogen storage, and the software platforms that optimize storage deployment and dispatch. With 20 funders actively investing in energy storage startups tracked in Superscout's database, the sector draws capital from climate-focused venture funds, energy infrastructure investors, industrial corporate ventures, and growth equity firms attracted by the essential role of storage in enabling the renewable energy transition and grid stability.

The energy storage investment thesis is one of the clearest in climate tech: intermittent renewable energy (solar and wind) cannot reliably power the grid without storage, and the world is deploying renewable generation at unprecedented rates. Global energy storage installations are projected to reach over 1 terawatt-hour of cumulative capacity by 2030, with annual deployments growing at 25-30% annually. The economics are increasingly favorable: lithium-ion battery costs have declined over 90% since 2010, and grid-scale storage is now cost-competitive with natural gas peaker plants in many markets.

Superscout's stage data shows 14 funders (70%) at seed, 11 (55%) at pre-seed, 9 (45%) at Series A, 4 (20%) at Series B, and 10 (50%) at growth equity. The median minimum check is $2 million, median maximum is $30 million, and the 75th percentile reaches $40 million. The remarkably high growth equity ratio (50%) and very large check sizes reflect the extreme capital intensity of energy storage: building battery manufacturing facilities, deploying grid-scale storage projects, and scaling novel battery chemistries from lab to production requires hundreds of millions in capital. These are among the largest check sizes of any subsector in Superscout's database.

Next-generation battery chemistries represent the most active research-driven investment category, with companies developing solid-state batteries (higher energy density, improved safety), sodium-ion batteries (lower cost, abundant materials), iron-air batteries (ultra-long-duration storage), and zinc-based chemistries. Long-duration energy storage, systems that can store energy for 8-100+ hours rather than the 4-hour typical of current lithium-ion deployments, is particularly compelling because it addresses the multi-day renewable energy gaps that short-duration storage cannot bridge.

For energy storage founders, the 2025-2026 funding environment strongly favors companies with proven manufacturing capability, secured offtake agreements from utilities or grid operators, and technology that addresses specific storage duration or application niches where existing solutions are inadequate.