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Ingeteam, Powin supply equipment to California solar-plus-storage and standalone battery projects

Hecate Energy’s Johanna BESS project. Image: Ingeteam.

Energy storage system integrator Powin Energy and PV inverter manufacturer Ingeteam have supplied battery storage equipment to two 20MW projects in California. 

Powin Energy has been selected as supplier of a fully integrated battery energy storage system (BESS) for Rabbitrush Solar Project, a solar-plus-storage facility in California’s Kern County in development by Leeward Renewable Energy.

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Or continue reading this article for free reported in November that Leeward’s engineering, procurement and construction (EPC) contractor McCarthy Building Companies had begun construction work at the project site

It will pair 100MWac of solar PV with a 20MW / 50MWh BESS. It is notable for being the first project to begin construction in Leeward’s 10GW portfolio of PV projects in development that it purchased from vertically integrated solar company First Solar. First Solar’s US-made thin-film PV modules will be used. 

Powin will supply the full BESS solution including battery cells, enclosures, cabling, transformers, inverters and all software and controls systems. The company will install its Stack 230P BESS 1000Vdc solution. 

Powin said it the Stack 230P is suitable for the required 1.5 hour duration of storage as well as grid services applications like frequency regulation. Stack 230P was launched earlier this year in April, while Powin has just launched Centipede, a modular BESS solution which enables users to combine multiple units of its newest product, Stack750E

The Oregon-headquartered system integrator will commission as well as provide operations and maintenance (O&M) services for the BESS. Powin will begin installation next month. 

While an August 2022 date had previously been given for the expected commissioning of the project, this has now been set as December next year. Leeward has signed contracts with multiple off-takers including two Community Choice Aggregator (CCA) energy suppliers. 

Meanwhile, power control electronics specialist Ingeteam revealed this month that it supplied battery inverter technology to Johanna Energy Storage System, a 20MW / 80MWh standalone BESS in Orange County, California. 

The Johanna project was completed in late September, constructed by Mitsubishi Power for its owner and operator, renewables developer Hecate Energy’s energy storage joint venture (JV) with InfraRed Capital Partners.

The system’s four-hour duration lithium iron phosphate (LFP) battery storage was also supplied by Powin Energy and complemented by 20 Ingeteam battery inverters featuring 1,500Vdc technology, supporting applications including frequency regulation. 

As previously reported by, the grid-connected project is part of a multi-year study of how best to integrate renewable energy onto the California Independent System Operator (CAISO) grid and how it can offset ongoing and anticipated growth in energy demand in Orange County. 

The study will enable validation of assumptions of distributed energy resource (DER) capacity in the region as well as grid requirements and aid the development of expertise to more broadly deploy DER. 

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