Critical Loop Is Selling Batteries as an 18-Month Bridge Around a Southern California Edison Feeder Build

Twelve megawatts of batteries and 60 megawatt-hours of capacity will sit behind a seven-megawatt utility feed at a six-building manufacturing campus in Long Beach. The batteries charge overnight on that same feed and discharge during production shifts, when building demand would otherwise climb above the import limit.

Critical Loop announced the project on October 27 with developer SRG Commercial. The full package totals a nominal 25 megawatts: roughly 7 MW of firm Southern California Edison service, 2 MW of flexible service, the 12 MW / 60 MWh battery fleet, and 3.5 MW of generators reserved for extended outages.

The term. The arrangement holds the site together for at least 18 months while SCE builds two new distribution feeders to the campus. The utility construction schedule, not a rate schedule, sets the length of the contract.

The purchase logic. The customer’s constraint is an interconnection queue. The battery is the equipment that arrives inside the window that queue leaves open, and it is the running asset through the bridge term, with the generators held in reserve.

That is a different sales conversation from the one the commercial storage market has spent recent years learning to have. A demand-charge battery is underwritten against a tariff: the customer keeps paying the utility either way, and the asset earns the delta between the bill with storage and the bill without it. A bridge battery is underwritten against a date. The customer’s alternative is operating at seven megawatts, or waiting.

The ratio. Sixty megawatt-hours behind twelve megawatts of inverter is five hours of duration. A cabinet sized to shave a monthly billed kilowatt peak typically discharges for one or two hours, on a handful of days, in the months that set the ratchet. An asset covering production shifts against a fixed import limit discharges on most working days, for most of the shift, every month of the term.

Five-hour duration at building scale carries a different cost structure and a different cycling profile than the two-hour cabinet now converging across the commercial catalog. Vendors quoting the 125 kW and roughly 260 kWh form factor, which has landed at five suppliers in roughly a month, are building for the tariff case. The bridge case asks for four to five times the energy behind the same power rating.

The operator. Critical Loop owns, operates and maintains the batteries. The company closed a $26 million Series A, bringing total capital raised to $49 million. It runs 67 control nodes across California, has deployed roughly 50 megawatt-hours, and sources cells from six battery manufacturers.

Those numbers set the scale of what the Long Beach project represents for the company. Sixty megawatt-hours in one package exceeds the company’s entire deployed fleet to date. A business that has placed 50 MWh across its California footprint is committing more than that volume to a single campus on a term that the utility, not the customer, controls.

The amortization question. An 18-month revenue stream is short against the service life of 60 megawatt-hours of lithium. Either the bridge term prices at a premium that a tariff-driven deal could never support, or the asset has to find a second life somewhere after SCE energizes the new feeders. Neither path has been disclosed for this project, and the answer is the central underwriting variable in the segment.

That is what separates bridge storage from the demand-charge model as a financial product. A demand-charge battery sits on one meter for ten years and earns a declining but continuous return. A bridge battery earns intensively for a fixed window against a hard end date, which puts the residual value assumption, not the savings calculation, at the centre of the credit case.

The rental channel. Aggreko put three new battery sizes into its lineup on November 4, spanning 120 kWh to roughly 1.3 MWh, with two trailer-mounted units and one freestanding module, supporting grid-forming and grid-following operation and marketed on speed of deployment for temporary and immediate-need applications. The rental incumbent’s catalog now brackets the lower end of the commercial range.

Rental power has always been the business of selling a kilowatt against a date. The margin in that business sits in fleet utilization across many short terms, which is a different financial skill from structuring a ten-year savings share, and it is the skill a bridge-storage business has to learn. Aggreko has decades of it, and has now added the hardware.

The segment. Two buying motions are now visible at building scale. One targets a tariff line and prices against a monthly bill. The other targets an interconnection delay and prices against a schedule. They favour different durations, different ownership structures, different sales engineering, and different residual value assumptions.

The Long Beach project puts numbers on the second motion that the industry has largely lacked: 60 megawatt-hours, 18 months, six buildings, and one seven-megawatt feed carrying a campus that would otherwise wait for a utility construction crew.

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