GridStor acquires 400 MWh storage project in Arizona from Strata Clean Energy

GridStor has acquired a 100 MW battery storage project in Arizona from Strata Clean Energy, under a 20-year tolling agreement with Arizona Public Service to meet rising power demand.

Share:

Comprehensive energy news coverage, updated nonstop

Annual subscription

8.25€/month*

*billed annually at 99€/year for the first year then 149,00€/year ​

Unlimited access • Archives included • Professional invoice

OTHER ACCESS OPTIONS

Monthly subscription

Unlimited access • Archives included

5.2€/month*
then 14.90€ per month thereafter

FREE ACCOUNT

3 articles offered per month

FREE

*Prices are excluding VAT, which may vary depending on your location or professional status

Since 2021: 35,000 articles • 150+ analyses per week

GridStor, a U.S.-based developer and operator of utility-scale battery energy storage systems, has completed the acquisition of the White Tank project in Arizona. The project, with a capacity of 100 MW/400 MWh, was sold by Strata Clean Energy, which will continue in a consultative role until commissioning expected in the first half of 2027.

20-year tolling contract with Arizona Public Service

The project will operate under a twenty-year tolling agreement with Arizona Public Service (APS), the state’s largest electric utility, serving approximately 1.4 million customers. Located in Maricopa County, the system will allow APS to store and dispatch electricity as needed, particularly during peak demand periods.

APS registered record demand this summer, particularly in August, amid rapid population growth and industrial expansion. The integration of battery storage is intended to enhance grid reliability in response to increasing load.

Strategic expansion in the Southwest market

GridStor stated this transaction marks its fourth acquisition in twelve months and its second in Arizona. Backed by Goldman Sachs Asset Management, the company manages a portfolio of over 5 GW of battery storage projects in late-stage development or under construction across the western and central United States.

The White Tank project is part of GridStor’s strategy to deliver flexible energy solutions to utilities, data centres, and industrial facilities. Financial terms of the transaction have not been disclosed.

Continued consultation by Strata until commissioning

Strata Clean Energy, the project’s original developer, will retain a consultative role until commercial operations begin. The company stated that this deal reflects its commitment to supporting partners with large-scale grid solutions.

The long-term agreement between GridStor and APS highlights the growing deployment of standalone energy storage projects in regions facing sustained demand growth.

Japanese company AI.net has signed a supply deal with China’s CATL for 1GWh of lithium-ion batteries, marking its entry into large-scale energy storage with a target of 500MW by March 2028.
Canadian group Energy Plug Technologies continues its expansion in the US market with the delivery of a new energy storage system to an industrial client based in the southern region.
Despite the emergence of new storage technologies, lithium-ion batteries retain a dominant position thanks to industrial leadership, improved performance and a high geographic concentration of production capacity.
Envision Energy launches the Gen 8 platform, a modular storage range from 6 to 12 MWh, aiming to optimise energy density, logistical flexibility, and profitability for large-scale projects.
BAK Battery presented in Chongqing its semi-solid batteries ready for industrialisation, with cells reaching up to 390Wh/kg, confirming its strategy focused on scenario-specific adaptation and mass production.
Daiwa Energy & Infrastructure has launched a 38MW grid-scale battery system in Chitose, aiming for commissioning in 2027, as part of its deployment of high-voltage storage assets across Japan.
Menlo Digital has started construction on its MD-DC1 data centre in Herndon, marking a key step in its national development programme exceeding 1.8 GW.
Finnish energy company Vantaan Energia has selected Elisa Industriq’s Gridle service to operate its new energy storage system in Rekola, supporting national grid flexibility.
US-based Eos Energy will supply up to 750 MWh of zinc-based storage systems to MN8 Energy, targeting high-demand projects such as data centres and industrial facilities.
Eos Energy and Talen Energy partner to develop multiple energy storage projects in Pennsylvania to meet rising electricity demand driven by AI and cloud computing growth.
NEO Battery Materials will supply high energy density batteries to a South Korean industrial robotics company under a $2.5M CAD order and joint development agreement over two years.
US-based battery storage developer Bimergen Energy has appointed Cole Johnson and Robert Brilon as co-CEOs to execute a large-scale industrial plan backed by $250 mn in recent funding.
Trina Storage has introduced its new Elementa 3 energy storage system, engineered for the Gulf’s extreme conditions and aimed at boosting energy density while lowering operating costs.
Japanese company Sun Village has connected its first energy storage facility to the grid and formalised a strategic partnership with Marubeni Power Retail to operate the asset on electricity markets.
Lightshift Energy has secured $75mn in funding from KeyBanc to support six operational projects and launch ten more, in response to rising demand for electric storage on the US East Coast.
Austrian battery optimisation specialist enspired enters Japan in partnership with Banpu NEXT, backed by a Series B extension to over €40mn.
Ameresco has completed a 50 MW battery storage system to support Nucor’s expansion in Arizona, marking one of the largest behind-the-meter industrial projects in the United States.
Rondo Energy has launched commercial operations of the world’s largest industrial heat battery, delivering 24-hour steam from off-grid solar power.
SUNOTEC expands in the Bulgarian market with seven projects combining battery and solar, totalling 763 MWh of storage and 115 MWp of photovoltaic capacity.
Danish fund Copenhagen Infrastructure IV transfers half of its stake in the UK-based Coalburn 2 project to AIP Management, strengthening AIP's energy storage portfolio in the United Kingdom.

All the latest energy news, all the time

Annual subscription

8.25€/month*

*billed annually at 99€/year for the first year then 149,00€/year ​

Unlimited access - Archives included - Pro invoice

Monthly subscription

Unlimited access • Archives included

5.2€/month*
then 14.90€ per month thereafter

*Prices shown are exclusive of VAT, which may vary according to your location or professional status.

Since 2021: 30,000 articles - +150 analyses/week.