For the first time, solar power generated more electricity than coal in the United States in May 2026, according to a report from the energy think tank Ember. The milestone marks a turning point in the US energy mix, with solar supplying a record 12.8 percent of US electricity and coal falling to 12.2 percent, Ember reported. The total output from solar last month was a record 45.5 TWh, making it the third-largest source of electricity in the country, while coal generated 43.4 TWh.
Historic Shift in US Power Generation
Ember's analysis shows that solar has been steadily gaining ground while coal declines. In April 2026, coal output dipped to its lowest-ever monthly total on record at 39.3 TWh, according to Ember. The share of coal generation in the US mix has nearly halved in the last five years, falling from 19.7 percent in May 2021 to 12.2 percent in May 2026. Over the same period, solar power's share more than doubled from 5.4 percent to 12.8 percent.
| Metric | May 2021 | May 2026 | Change |
|---|---|---|---|
| Coal share of US electricity | 19.7% | 12.2% | -7.5 pp |
| Solar share of US electricity | 5.4% | 12.8% | +7.4 pp |
| Total coal generation (TWh) | ~49.0 (est.) | 43.4 | ~-11% YoY |
| Total solar generation (TWh) | ~19.0 (est.) | 45.5 | ~+139% |
Source: Ember, as reported by Engadget.
Despite the Trump administration's push to revive the coal industry, the data shows a clear downward trend. Analysts at Ember said clean power is still ticking upward even as policy shifts in the other direction. In March, according to Ember, renewables collectively generated more electricity than coal.
Implications for Energy Trade and Policy
The shift has direct consequences for international trade in energy commodities. Coal importers and exporters must reassess US demand, which is structurally declining. US coal exports to key markets may face reduced domestic availability as utilities continue to retire coal plants. Conversely, the surge in solar generation drives demand for photovoltaic panels, inverters, and balance-of-system components—most of which are imported. Trade executives should monitor tariff and trade policy changes affecting solar equipment, as well as any policy responses that could slow or accelerate this transition.
While the Parker Solar Probe's 28th flyby of the sun (reaching 3.8 million miles from the surface at 430,000 mph) is a separate science story, the solar energy milestone underscores the growing economic importance of solar technology. The commodity implications are clear: coal's share is shrinking, solar's is expanding, and supply chains must adapt.
What to watch: The upcoming US Energy Information Administration (EIA) monthly generation data for June 2026 will confirm whether solar maintains its lead over coal. Additionally, any new tariffs or trade agreements affecting solar panel imports will have outsized impact on the pace of the energy transition.
Sources:
