Clearway Energy Group has brought online the first ever utility-scale solar-plus-storage project on the Hawaiian island of O’ahu.

A large-scale solar PV plant with four-hour duration battery storage could be built on underutilised land at a US Armed Forces Base in Hawaii.

Following a report on Friday that Hawaiian Electric has contracted PPAs with 75MW of solar projects including battery storage with developer Clearway, the utility has put before regulators proposals for five other grid-scale projects.

San Francisco-headquartered firm Clearway Energy Group has signed power purchase agreements (PPAs) with utility Hawaiian Electric Company for two solar-plus-storage projects on Oahu, Hawaii, with a combined PV capacity of 75MW.

Hawaii’s position as one of the leading US states for energy storage deployment shows no sign of weakening as Hawaiian Electric Co last week announced 120MW of new battery storage across two projects in Oahu.

Hawaiian Electric has teamed with Californian storage company Amber Kinetics on a 4-hour duration flywheel energy storage pilot project in Oahu.

A large-scale energy storage system aimed at integrating renewables into electricity networks has been completed on the Hawaiian island of Kaua’i, paired with the state’s biggest PV array to date.

An “enormous” request for proposal (RFPs) put out by the Hawaii Electric Company (HECO) for up to 200MW of energy storage was responded to by more than 60 would-be developers.