Solar and battery storage dominated US grid additions in Q1 2026, capturing 91% of all new capacity deployed. The Solar Energy Industries Association and Wood Mackenzie documented this historic shift in their latest market report, underscoring the complete restructuring of American power infrastructure away from fossil fuels.
The data reflects years of falling solar panel costs, plummeting battery prices, and accelerating adoption of distributed energy resources. Utilities and developers now view solar-plus-storage as the default choice for new generation. The combination offers grid operators flexibility that coal or natural gas plants cannot match, while delivering power at competitive prices even without subsidies in many markets.
This 91% figure encompasses both utility-scale solar farms and residential rooftop installations paired with battery systems. The storage component proves essential for grid stability, allowing operators to shift renewable power from peak generation hours to peak demand periods. Battery costs have dropped roughly 90% over the past fifteen years, making storage economically viable for projects that would have required backup gas plants just a decade ago.
The dominance of solar and storage reflects broader industry economics. A typical solar farm with four-hour battery storage now costs less than operating existing coal plants in many regions. New natural gas plants take years to permit and build, while solar projects deploy in months. Wind energy also grew significantly but trails solar capacity additions nationally.
This transition accelerates decarbonization targets but creates new challenges. Utilities must upgrade transmission lines to handle power flowing from distributed sources. Grid operators need more sophisticated forecasting and control systems. Manufacturing capacity for solar panels and batteries remains concentrated in Asia, though US production is expanding under incentives from the Inflation Reduction Act.
Grid operators expect this trend to continue. Solar and storage will likely maintain dominance through 2030, as declining costs and improving technology make alternatives economically uncompetitive.