The Voice of Renewables presents our monthly global roundup of energy storage deals announced or closed in August 2026. Covering major PPAs and offtake agreements alongside financing, M&A, refinancings, bonds, tax equity and joint ventures, this is a concise view of the transactions driving energy storage investment and development around the world.
PPAs / Tolling Agreements
- Centrica Energy & Zelestra (Germany) — 10-year physical tolling agreement for a 99MW/297MWh standalone battery storage project in Lower Saxony; Centrica handles trading and optimisation while Zelestra builds and owns it — one of Germany’s larger single-site merchant BESS tolling deals.
- Saudi Power Procurement Company / Saudi Electricity Co. & ACWA Power, ENGIE, Al Sharif Contracting, Haji Abdullah Alireza & Co. — Four Independent System Provider agreements for standalone 4-hour battery storage across sites in Makkah, Hail and Qassim, totaling 2,000MW/~8GWh worth roughly $1.16 billion — Saudi Arabia’s first large-scale wave of long-term storage offtake contracts.
Other Deals
- US DOE Loan Programs Office & Amanecer Puerto Rico (Pattern Energy) — Closed a $489.4 million federal loan to fund 220MW of standalone battery storage in Arecibo and Santa Isabel, Puerto Rico, aimed at cutting outage hours.
- NextEnergy UK Fund — Acquired a 107MW/151MWh operating UK standalone battery storage portfolio from Eku Energy, all under Capacity Market contracts.
- Revolve Renewable Power — Acquired six operating behind-the-meter battery storage sites in Ontario (14.2MW/24.3MWh combined) from Trillium Storage LP for roughly CAD $7.6 million.
- Certain Energy (formerly RFC Power) — Closed a £10 million Series A to commercialize a manganese-based long-duration flow battery, with Centrica and Ceres Power among the backers.
- Greenvolt Group & UniCredit — €218 million financing package for two standalone battery storage projects in Poland (400MW/1.6GWh combined), part of a wider 1.2GW Polish capacity-market storage pipeline.
- Key Capture Energy & Standard Chartered — Closed a $300 million letter-of-credit facility supporting Key Capture’s US storage pipeline (623MW operating, 8+GW in development).
- Ore Energy — Raised a €37.3 million Series A to scale its iron-air long-duration battery technology toward a first gigawatt-hour-scale factory.
- Larsen & Toubro — Won an EPC order to develop three standalone battery storage projects totaling 6GWh for an undisclosed Middle East client.
- Sungrow & Suez Energy Equipment (with Scatec) — Broke ground on a $50 million dedicated battery storage manufacturing plant in Egypt’s Suez Canal Economic Zone, targeting up to 10GWh/year of production.
- Energy Vault & an undisclosed Texas hyperscaler (with Caterpillar as EPC partner) — Signed a supply agreement to deploy 1.25GW of battery-storage-plus-generator power infrastructure for an AI data center, expected to generate $500-600 million in revenue through 2027.
- Noon Energy & Sabancı Renewables (Turkey) — Signed a joint venture to co-develop up to 1GW/100GWh of ultra-long-duration storage targeting round-the-clock power for AI infrastructure.
- Base Power — Raised a $1 billion Series D at a $13 billion valuation to fund a US factory and its home-battery/virtual-power-plant platform — the largest single storage-sector funding round of the month, though residential/distributed rather than utility-scale.
