In June 2025, Redwood Energy and Crusoe announced the deployment of the world’s largest second-life battery system: a 12 megawatt (MW) / 63 megawatt-hour (MWh) solar-plus-storage microgrid powering four Crusoe Spark modular data centers. Completed in under four months, the installation has achieved 99.2% operational availability since commissioning, recording minimal unplanned downtime and exceeding predefined reliability targets.
The project leverages repurposed electric vehicle (EV) batteries managed by Redwood Energy’s proprietary Pack Manager platform. Since going live, the system has delivered reliable, around-the-clock power for demanding infrastructure workloads, demonstrating meaningful cost and performance advantages. Its modular design—combining Crusoe’s Spark data centers with Redwood’s battery storage units—enables rapid deployment, flexible scaling, and faster delivery compared with traditional grid extensions.
Building on these results, the partners are expanding the campus deployment to support 20 additional Spark data centers, increasing compute capacity by nearly sevenfold. This scale-up addresses a growing gap between accelerating power demand and slower grid interconnection processes. As organizations explore behind-the-meter generation or fully off-grid solutions, integrated energy storage and coordinated energy management platforms are moving from niche concepts to mainstream applications.
Redwood Energy focuses on delivering modular energy solutions with rapid installation schedules and competitive economics. The expanded partnership with Crusoe underscores confidence in second-life EV batteries as a dependable energy resource. The companies note that this project exemplifies a broader industry shift toward distributed power models that prioritize resiliency, speed of deployment, and environmental sustainability.
Looking ahead, Redwood Energy has an expanding pipeline of projects across multiple partners, ranging from hundreds of megawatt-hours to gigawatt-hours. Each initiative will build upon the same modular, rapidly deployable architecture used in the initial campus deployment. As data centers and other critical infrastructure increasingly adopt decentralized power systems, the collaboration between Redwood Energy and Crusoe serves as a proof point for next-generation energy solutions.
Source: Redwood Materials
