Corporate funding for energy storage companies, including venture capital (VC), debt, and public market financing, reached $16.7 billion across 120 deals in 9M 2026, a 49% increase compared to $11.2 billion across 85 deals during the same period in 2025. Deal activity increased 41% year-over-year (YoY), reaching the highest nine-month transaction count in the past five years.
To get a copy of the report, visit: https://mercomcapital.com/product/9m-2026-funding-ma-report-energy-storage/
“Energy storage corporate funding increased sharply in the first nine months of 2026, supported by growing electricity demand, the need for greater grid reliability, and expanding applications for battery storage. VC and debt financing rose significantly, while corporate M&A and project acquisitions also increased. Although a few large transactions accounted for much of the funding growth, deal activity increased across the sector. Strong investment in distributed storage and alternative battery technologies reflects growing interest in solutions that can meet different power and storage requirements,” said Raj Prabhu, CEO of Mercom Capital Group.
VC funding for energy storage companies in 9M 2026 totaled $5.4 billion across 79 deals, representing a 93% YoY increase compared to $2.8 billion raised across 56 deals in 9M 2025.
Energy Storage Downstream companies attracted the most VC funding in 9M 2026, raising approximately $1.8 billion. Other leading categories included Iron-air Batteries, Thermal Energy Storage, Li-based Batteries, Metal-Hydrogen Batteries, and Materials & Components companies.
The Top 5 energy storage VC funding deals in 9M 2026 were Base Power, which raised $1 billion; Form Energy, with $750 million; Antora Energy, with $550 million; and EnerVenue Holdings and Sila Nanotechnologies, which raised $300 million each.
Announced debt and public market financing for the energy storage sector in 9M 2026 totaled $11.4 billion across 41 deals, a 36% increase compared to $8.4 billion across 29 deals in 9M 2025. Public market financing accounted for approximately $6.7 billion across 20 deals, while debt financing contributed $4.7 billion across 21 deals.
Corporate M&A activity in the energy storage sector increased 35% YoY, with 27 transactions announced in 9M 2026, compared to 20 transactions during the same period in 2025.
Energy Storage Downstream companies accounted for the largest share, with 14 transactions, followed by Energy Storage Systems and Materials & Components companies, each with four transactions.
Energy storage project acquisition activity increased significantly during the first nine months of 2026, with approximately 21.6 GW of projects acquired across 108 transactions, compared to 10.1 GW across 46 transactions in 9M 2025.
Acquired capacity increased 114% YoY, while transaction activity rose 135%. Standalone energy storage projects accounted for approximately 16.5 GW of acquired capacity, while renewables-plus-storage projects represented approximately 5.2 GW.
To get a copy of the report, visit: https://mercomcapital.com/product/9m-2026-funding-ma-report-energy-storage/
