Storage projected to comprise 5-10% of US power capacity by 2050

⚡ AI Executive Summary

Researchers have integrated grid-scale electricity storage modeling into a multisector dynamic energy framework to assess storage's role in the evolving US power system. The analysis examines how storage could support integration of variable renewable energy and changing demand patterns across multiple economic sectors and time horizons. The findings suggest storage will occupy a meaningful but not dominant position in future grid architecture, with capacity shares remaining in the single-digit percentage range through the end of the century. More broadly, this work highlights a critical modeling gap: most integrated assessment models have historically underweighted or omitted storage as an explicit operational and investment decision variable. By incorporating hourly dispatch constraints and capital-cost dynamics, the researchers demonstrate that storage's primary grid value lies in temporal load shifting—capturing renewable generation during abundant periods and releasing it when variable supply tightens or demand peaks. This implies that storage economics will remain tightly coupled to renewable penetration rates and demand-side flexibility; markets and regulators should expect storage deployment to concentrate in regions with the highest solar and wind shares and the greatest peak-to-average demand ratios.