Together, solar and battery storage account for 81% of the expected total capacity additions, with solar making up over 50% of the increase. power grid in 2025 in our latest Preliminary Monthly Electric Generator Inventory report. 6 GW of capacity was installed, the largest. . For solar-plus-storage—the pairing of solar photovoltaic (PV) and energy storage technologies—NLR researchers study and quantify the economic and grid impacts of distributed and utility-scale systems. Much of NLR's current energy storage research is informing solar-plus-storage analysis. . Note: "Other renewables" include geothermal, wave, and tidal. Where in the world do people emit the most CO2? Which countries get the most electricity from low-carbon sources? Why did renewables become so cheap so fast? How have things changed? When will countries phase out coal power? Our World in. .