Global battery energy storage system integrators comprehensive ranking 2026

This report presents Wood Mackenzie’s comprehensive assessment of global battery energy storage system (BESS) integrators 2026. This BESS ranking includes AC coupled battery storage solutions and does not include DC block battery storage suppliers in the scope of the rankings. Data collected and analyzed in this report is for the full year 2025. As local content requirements, industrial policies, and energy security objectives reshape regional markets, integrators are increasingly differentiated by their global footprint, manufacturing capabilities, and ability to execute across diverse geographies. This year's evaluation places particular emphasis on battery technology, system safety, and supply chain resilience, while also examining sustainability and ESG performance as procurement criteria become increasingly important for utilities, developers, and financiers worldwide.