Solar grew 15% in a year. The government ordered the old gas plants to stay open anyway.
The government blocked fossil fuel retirements to protect grid reliability, and solar kept growing fast enough to threaten the economics of the plants it just saved.
What happened
US solar power generation increased by 15.2% in January 2026 compared to the previous year. This means more electricity is being produced from solar panels across the country.
Why it matters
This data point shows continued, significant growth in solar energy output. It suggests that the build-out of solar capacity is proceeding at a pace that is measurably increasing the nation's electricity supply. The trend of adding gigawatt-hours of solar generation year-over-year is a key indicator of the energy transition's progress.
The signal
Utility-scale battery storage developers are next in line. With solar now material enough that grid operators must plan around it, the remaining structural argument for keeping gas peakers online is overnight and shoulder-season reliability, which is exactly what 4-hour storage solves. Procurement mandates and retirement schedules are the next 12 months of paperwork.
The document reports that solar now powers 17 million homes. It also reports that solar made the least power in December, which is when homes need the most power.