US Solar Growth Slows to 22%—Still Beating Rising Demand
Solar's explosive run in the US is finally easing off the accelerator. Through the first seven months of 2026, solar generated 39 terawatt-hours more than the same period a year earlier—a 22 percent jump, down sharply from the 30-plus percent quarters that defined recent years. The deceleration matters because demand is climbing again, and solar remains the cheapest way to meet it. Here's what the grid data actually shows, and what it means for the next 12 months.
Growth Is Slowing—But It's Not Collapse
The math was always going to catch up. As the installed solar base gets larger, the same absolute addition registers as a smaller percentage gain. Through September 2025, solar added 48 TWh year over year; for the same window in 2026, that fell to 39 TWh. A 22 percent growth rate is still strong by any normal standard. What's changed is the context: the federal government is now hostile to renewables and has stripped incentives, which may be contributing to the slowdown. Small-scale rooftop solar also grew more slowly, though it still rose over 12 percent year over year.
Renewables Are Quietly Outpacing Demand
Here's the number that should anchor the conversation. US electricity demand rose 51 TWh in the first seven months of 2026—about 2 percent, down from 3 percent the prior year. Wind and solar growth alone added 55 TWh. In other words, renewables covered the entire increase in grid demand, without factoring in on-site data center generation or small-scale solar. Wind and solar now supply 21 percent of US electricity; add hydro and it's 27 percent; add nuclear and 45 percent of US power is emissions-free. For comparison, the EU gets about 30 percent from wind and solar and 65 percent emissions-free.
What's Coming Next—and Where
The Energy Information Agency's pipeline data hints at the near future. Two large offshore wind projects will finish off the East Coast, including a 2.6 GW installation off Virginia—likely the last of their kind until the 2030s, since the Trump administration has paid developers to stop building similar projects. Onshore wind continues across the Midwest and Plains. Solar is spreading into Michigan and Wisconsin, latitudes that wouldn't have penciled out a few years ago. Battery storage is moving beyond California and Texas into Arizona, Colorado, Michigan, and Georgia. A handful of new natural gas plants are coming online, mostly in the Midwest and Texas. No new nuclear or coal plants will be completed—it's been 13 years since the last new US coal plant.
Key Takeaways
- US solar grew 22% year over year in the first seven months of 2026, down from over 30% in prior quarters.
- Wind and solar added 55 TWh while grid demand rose 51 TWh—renewables covered all new demand.
- Wind and solar now supply 21% of US electricity; 45% of US power is emissions-free with nuclear included.
- Two East Coast offshore wind projects will likely be the last until the 2030s due to federal opposition.
- Battery storage is expanding beyond California and Texas into Arizona, Colorado, Michigan, and Georgia.
Source: Ars Technica • 🇺🇸 San Francisco
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