Currently under construction, the Viejas microgrid will combine 15 MW of solar with 38 MWh of long-duration, non-lithium storage and is the first loan the LPO has made under its long-dormant Tribal Energy Financing Program.

Form Energy hopes to use its long-duration iron-air batteries to firm up renewable energy generation across extended stretches in New England.

Eos Energy Enterprises prides itself on procuring most of its raw materials within a day’s drive of its plants in Turtle Creek, Pa.