Used EV batteries could upend the race for long-duration storage

AI generated summary

Redwood Materials has introduced a new approach to long-duration energy storage (LDES) by utilizing second-life electric vehicle (EV) batteries, claiming they are the most cost-effective solution available. This innovation comes at a time when traditional LDES technologies have struggled to deliver large-scale, economically viable projects. By repurposing used lithium-ion batteries, Redwood aims to provide a reliable storage solution that can support renewable energy sources, particularly during periods of low solar production.

Despite skepticism from some industry experts regarding the reliability and longevity of second-life batteries, Redwood's initial project has already surpassed the capacity of many existing LDES installations in the U.S. The company’s strategy leverages the growing supply of used EV batteries, which is expected to increase significantly as electric vehicle adoption rises. If successful, Redwood's model could disrupt the LDES market and enhance the viability of a renewable energy grid, reinforcing the dominance of lithium-ion technology in energy storage solutions.