EDP Renewables completes 92-MW Sandrini battery storage in California

Renewables Now reported Monday that EDP Renewables has completed the 92-megawatt Sandrini battery storage project in California. The trade wire's dispatch is a headline and almost nothing else: a capacity figure, a project name, a state, a past-tense verb. What follows is a subscription pitch.

The item never says how long the battery can discharge. A megawatt without a duration is an engine without a fuel gauge. At two hours, the plant would hold 184 MWh. At four, it would hold 368 MWh. Neither figure appears. The point of interconnection goes unnamed. So does the offtaker. Whether the plant is merchant, contracted, or backed by a resource-adequacy agreement is unstated. EDP Renewables gets credit as builder; the equity holder is absent.

None of this makes the project less real. Storage announcements are the sector's chattering class; a commissioned megawatt is an asset the grid can actually use. Sandrini is a new name in this desk's tracking, and the completion enters it into the ledger. The plant's purpose, in all likelihood, is the standard one for California batteries: soak up midday solar and discharge into the evening peak. The report does not say.

A battery's value to the grid and to its owners lives in those missing fields. Without duration, interconnection, or contract type, there is no way to benchmark Sandrini against comparable plants. In a market where battery economics turn on dispatch hours, that is not a footnote. It is the absent half of the story. The completion is a milestone, not a revenue line. For now, 92 MW is a placeholder.