Proterra Adding U.S. Battery Cells to Onyx Platform by 2027

Key Details Volvo Group's Proterra division will offer U.S.-made battery cells as an option for its Onyx platform starting in Q1 2027. The company currently uses cylindrical cells from South Korea's LG Energy Solutions, which will remain available. Proterra is still selecting its U.S. cell supplier but has already begun taking customer orders. Why It Matters North American truck manufacturers are demanding greater domestic content due to shifting geopolitical conditions and tariff policies. The Trump administration's emphasis on boosting American manufacturing has accelerated this trend across the industry. Having U.S. cell options positions Proterra competitively for customers navigating new domestic content requirements. Onshoring Progress Proterra already manufactures battery packs at its Greer, South Carolina facility, with 88% of costs sourced from the U.S. and treaty allies. The company plans to increase American content in battery packs by 650% by 2028 through onshoring additional pack and module components. This expansion reflects growing industry focus on supply chain certainty and reducing reliance on overseas manufacturing. Customer Base Proterra serves medium and heavy-duty truck, coach, commercial bus, and school bus manufacturers. The move toward domestic cells strengthens the company's appeal to OEMs facing regulatory pressure to increase domestic sourcing.