Powin Energy

Overview

Powin was a Tualatin, Oregon grid-scale battery energy storage integrator and software company that rose rapidly during the U.S. storage boom before filing for Chapter 11 in June 2025. At its peak it had deployed roughly 11 gigawatt-hours of storage across the United States, Canada, and other international markets, with about 6 gigawatt-hours of backlog remaining at filing, ranking third-largest BESS integrator in North America behind Tesla and Sungrow by Wood Mackenzie's count.

The company traces to Powin Corporation, founded by Joseph Lu in 1989 as a consumer-goods manufacturing and logistics business, before pivoting to grid-scale storage in the 2010s. Powin differentiated itself by building its own software layer, an energy management system called StackOS, rather than relying solely on third-party platforms; StackOS ran on Centipede, its modular battery hardware. That gave it greater control over system performance, safety, and warranty management, and was the basis for its pitch that it could deliver better long-term performance than integrators using off-the-shelf software on commodity hardware.

Business model

Powin operated as a BESS integrator: it sourced lithium-ion cells and modules from manufacturers, primarily CATL and other lithium-iron-phosphate suppliers, integrated them into its own standardized stackable container format, deployed them at project sites, and provided long-term service and performance guarantees under multi-year contracts. The model is capital-light in that Powin did not manufacture cells, and it exposed the company to serious supply chain and warranty risk.

StackOS, the battery operating system, managed cell-level monitoring, thermal management, state-of-charge balancing, and grid dispatch across deployed systems. Powin retained ongoing software licensing and service revenue from operating assets, a recurring model intended to create value beyond the one-time project sale.

Rise & collapse

Powin's growth surged from 2020 to 2022 as utility-scale storage procurement rose and solar-plus-storage became cost-competitive across major U.S. markets. It raised equity from Trilantic Capital Partners and Energy Impact Partners in 2021 and a GIC-led round in 2022, and secured a $200 million debt facility from KKR in October 2024. It expanded its backlog aggressively, signing contracts with major utilities and independent power producers, and by 2024 ranked third-largest in North America by contracted backlog.

The collapse came from a confluence of problems fatal in combination. A steep escalation in tariffs on Chinese batteries, reaching as high as 145% after April 2025, upended the cost basis of a business built on imported LFP cells, and the relationship with lead supplier CATL soured into litigation, with CATL suing Powin for about $44 million in December 2024. Federal clean-energy policy uncertainty, warranty and performance issues on deployed systems including a 2023 fire at a project in Warwick, New York, and thin margins on fixed-price contracts compounded the strain, and the KKR facility could not offset mounting losses.

Powin, led since 2023 by CEO Jeff Waters after Geoff Brown, filed for Chapter 11 in the U.S. Bankruptcy Court for the District of New Jersey on June 10, 2025. Headcount had already fallen from about 500 at the start of 2025 to roughly 85, and a class of about 280 laid-off workers later settled WARN Act claims for $3.5 million. A plan of liquidation took effect in December 2025, winding the company down rather than reorganizing it.

Legacy & industry impact

Powin's failure was one of the largest collapses in U.S. energy storage and sent shockwaves through the BESS market. Utilities and IPPs that had contracted Powin systems faced uncertainty about warranty coverage, software support, and long-term performance for gigawatt-hours of deployed and under-construction assets. Much of that resolved through the bankruptcy sale: FlexGen Power Systems acquired substantially all of Powin's assets, a stalking-horse bid of roughly $36 million that the court approved on August 6, 2025 as part of about $54 million in total asset sales, taking over the StackOS and Kobold software IP and spare-parts inventory and stepping in to service a combined fleet of more than 25 gigawatt-hours that includes the stranded Powin installed base.

The collapse prompted a broader reassessment of counterparty risk in BESS procurement. Developers and offtakers began scrutinizing integrator balance sheets more carefully, imposing stronger parent guarantees and performance bonds, and in some cases shifting toward larger integrated suppliers such as Fluence, Tesla Energy, and BYD, whose financial backing offered greater security. Powin's story became a cautionary tale about rapid scaling in capital-intensive infrastructure on thin margins with long-tailed warranty obligations.

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