GM Redwood Battery Storage Project Extends EV Battery Value Chain

BESS

GM Redwood battery storage project will deploy repurposed electric vehicle battery packs at a General Motors plant in Michigan, extending the useful life of batteries before final recycling.

GM Redwood battery storage project will combine 100 reused EV battery packs into a 1.5MW/7.2MWh battery energy storage system. The installation will provide dispatchable power and help reduce electricity costs at the manufacturing site.

GM Redwood battery storage project is significant because it connects battery manufacturing, vehicle use, second-life energy storage and materials recovery within one supply chain. Redwood estimates the system will save more than $3mn in electricity costs over its operating life.

The project also shows how retired EV batteries can remain economically valuable even after they no longer meet automotive performance requirements.

Second-Life Batteries Add Value Before Recycling

EV batteries typically retain significant usable capacity when they are removed from vehicles. That remaining energy storage capability can support stationary applications where weight and space are less restrictive than in automotive use.

Repurposing packs for BESS applications can therefore delay recycling while extracting additional economic value from the battery.

For industrial facilities, storage systems can help manage peak electricity demand, provide backup power and shift energy consumption toward lower-cost periods.

The Michigan installation gives GM a direct opportunity to reduce plant electricity costs using batteries already linked to its own vehicle ecosystem.

This model also reduces the need for newly manufactured cells in some stationary storage applications. That can lower incremental demand for lithium, nickel, cobalt, graphite and other battery materials.

However, second-life systems still require testing, battery management and safety controls because used packs can have different degradation histories and performance characteristics.

Redwood Builds Closed-Loop Battery Supply Chain With GM

Redwood's relationship with GM extends across multiple stages of the battery lifecycle. The recycler handles manufacturing scrap, end-of-life EV packs and now second-life energy storage deployment.

Redwood has already received more than 28,000t of material from GM, with another 10,000 EV battery packs expected to enter the pipeline.

The company also works with Ultium Cells, GM's joint venture with LG Energy Solution, to recycle battery production scrap from facilities in Ohio and Tennessee.

This creates a more integrated materials loop. Manufacturing scrap can return quickly to recycling, while vehicle batteries can first enter stationary storage before eventually being processed for material recovery.

The approach could become increasingly important as EV battery volumes grow. Recycling alone captures raw materials, but second-life deployment can add another revenue stage before final recovery.

For automakers, that can improve battery economics while strengthening access to recycled lithium, nickel, cobalt and copper over the longer term.

The Metalnomist Commentary

GM and Redwood are showing that the battery circular economy does not begin with recycling. Second-life storage can create an additional commercial stage between vehicle use and materials recovery, improving both battery economics and supply-chain efficiency.