The AltaGas Pomona-SCE – BESS is a 20,000kW energy storage project located in Pomona, California, US.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was announced in 2016 and was commissioned in 2016.


The AltaGas Pomona-SCE – BESS was developed by AltaGas. The project is owned by AltaGas (100%).

The key application of the project is electric supply capacity.

Contractors involved

AltaGas and Samsung SDI have delivered the battery energy storage project.

Additional information

AltaGas was a successful participant in SCE’s Request For Offers (RFO) for resource adequacy from energy storage units. Under the terms of the Energy Storage Agreement, AltaGas will provide SCE with 20 MW of resource adequacy capacity for a continuous four hour period, the equivalent of 80 MWh of energy discharging capacity. AltaGas will receive fixed monthly resource adequacy payments under the ESA and will retain the rights to earn additional revenue from the energy from the lithium-ion batteries. In conjunction with the Energy Storage Agreement, AltaGas has selected Greensmith Energy Management Systems, Inc. (Greensmith), a leading provider of energy storage software and integration services, to provide its software control platform (GEMS) in addition to lithium-ion batteries and power conversion technology (“PCS”). The battery and PCS hardware will be integrated by Greensmith. AltaGas will retain overall project management, execution and operations of the Project.

About AltaGas

AltaGas Ltd (AltaGas) is an energy utility that carries out the extraction, transmission, distribution and storage of natural gas. It also generates electricity using diverse fuel sources, including run-of-river hydro, wind, geothermal and gas-fired generation plants. The company owns and operates utility assets that deliver natural gas to end-users in Canada and the US. AltaGas also operates NGL processing and extraction plants, transmission pipelines, natural gas gathering lines and field processing facilities to transport natural gas. The company also operates a fleet of rail cars, and truck terminals. It serves residential commercial and industrial customers. AltaGas is headquartered in Calgary, Alberta, Canada.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.