SAX Power, a manufacturer of energy storage systems, has completed its third funding round, raising €10 million (~$11.6 million) from a consortium of international and regional investors.
The round was led by Yotta Capital Partners, a Paris-based private equity firm, with participation from Alb-Donau-Ulm Kapital, the investment company of Sparkasse Ulm, and other private investors. WIPIT advised SAX Power on the transaction.
The new funding will enable SAX Power to strengthen its market position and advance industrial scaling efforts. The company is expanding its production capacities at its Erbach site near Ulm and broadening its product portfolio, which includes commercial and industrial storage solutions as well as large-scale “megastorage” systems designed to stabilize electricity grids and support renewable energy sources such as wind and solar.
SAX Power develops and manufactures energy storage systems based on its patented direct ACtechnology. The company’s portfolio features home battery energy systems with capacities of 5.8 kWh and 7.7 kWh, as well as modular industrial systems.
Currently, the systems utilize lithium-iron-phosphate (LFP) battery cells, while the company is actively developing sodium-ion-based alternatives. SAX Power’s solutions are already deployed across the European market, with plans underway for a broader international expansion.
According to Mercom’s 9M and Q3 2025 Funding and M&A for Energy Storage report, VC funding in the sector totaled $2.8 billion in 56 deals, a 4% increase YoY compared to $2.7 billion in 61 deals in 9M 2024. Materials and Components providers received the most VC funding in 9M 2025. Other top-funded categories included energy storage downstream companies, energy storage systems providers, lithium-based and sodium-based battery companies.
Texas-based Base Power has raised $1 billion in Series C funding, led by Addition, to accelerate the deployment of its home battery storage solutions. Existing backers, such as Trust Ventures, Valor Equity Partners, Thrive Capital, Lightspeed, Andreessen Horowitz, Altimeter, StepStone, Elad Gil, 137 Ventures, Terrain, and Waybury, returned for the round.
