Scaling Storage with Repurposed Batteries: Increasing Speed to Power via Low-Cost, Domestic Energy Storage

Developers, utilities, and clean power providers are all grappling with the same constraint: demand is here now, but the grid isn’t keeping up. Across U.S. power markets, average interconnection timelines exceed 2–4 years, with full transmission upgrades often taking 7–10 years. For AI factories and other industrial applications, these delays can cost tens of millions in lost revenue per year as planned facilities remain unbuilt while demand continues to grow. The core problem is no longer building new generation; it’s integrating it fast enough to meet explosive load growth.

One of the most immediate tools for easing grid constraints is the growing supply of domestic battery packs, both new and used batteries that are coming offline in EVs over the coming years (~350 GWh). By 2030, end-of-life batteries could supply more than 50% of the entire energy storage market. Repurposed packs can support multi-hour duty cycles, ride through disturbances, and integrate with renewables, while avoiding the manufacturing lead times, tariff exposure, and supply-chain risk associated with new battery procurement. For projects facing multi-year queues, this type of second-life storage can serve as a low-cost, low-carbon way to accelerate speed-to-power that scales with developers’ needs, from enabling smaller, faster interconnections by matching average load rather than peak demand to bypassing utility queues entirely through microgrid configurations.

The session would demonstrate how using repurposed batteries for storage is moving from an edge case to core energy infrastructure, discuss the technical breakthroughs enabling these systems at grid-scale, and dive into customer case studies that show real world use and impact. For the Cleanpower audience, this topic sits right at the intersection of speed to power concerns, siting considerations, and cost & revenue maximization. As load growth from data centers and electrification accelerates, Cleanpower would be a great environment to continue to advance the conversation and show how creative solutions like this can help unlock projects faster, reduce interconnection risk, and make better use of existing energy and materials.