In a landmark development for the American energy landscape, solar power has generated more electricity than coal for the first time on record. According to data from the global energy think tank Ember, solar energy supplied 12.8% of the United States’ electricity in May 2026, narrowly surpassing coal’s 12.2% share.
This milestone reflects the rapid transformation underway in the US power sector. Solar output reached a record 45.5 terawatt-hours (TWh), compared to coal’s 43.4 TWh. The achievement highlights solar’s emergence as a major player, now ranking as the third-largest source of electricity behind natural gas and nuclear power.
Solar’s Impressive Growth
Solar generation jumped 17% compared to May 2025, benefiting from longer daylight hours and a surge in new installations across key states such as Texas and Florida. Over the past five years, solar’s share of US electricity has more than doubled, driven by falling costs, technological advancements, and strong market demand—including from power-hungry data centers.
Ember senior data analyst Nicolas Fulghum remarked that this overtake “shows just how far solar has come, from a niche contributor to the third-largest and fastest-growing source of power in the US electricity system.” He anticipates more such months in the coming years, with solar potentially surpassing coal on an annual basis soon.
Coal’s Continued Decline
Coal generation saw a slight rebound from its all-time monthly low in April but remained 11% below May 2025 levels. It recorded its fourth-lowest monthly share ever, continuing a long-term downward trend as older plants become uneconomical to maintain.
Broader Energy Context
Natural gas continues to lead US electricity production, providing essential flexibility, while nuclear power delivers reliable baseload supply. Renewables, particularly solar and wind, along with energy storage, have dominated recent capacity additions. This shift is reshaping the grid amid rising overall electricity demand.
The milestone arrives amid ongoing policy discussions. While the current administration has expressed support for coal, market economics and state-level initiatives are accelerating the adoption of solar and other renewables.
Implications for the Future
This development underscores the improving economics of solar, which is now often cheaper than operating aging coal facilities. It carries significant implications for job creation in the renewable sector, reduced emissions, grid modernization, and long-term energy security.
Experts expect solar records to potentially fall again in June and July 2026, when seasonal generation typically peaks. As the energy transition accelerates, sustained investment in infrastructure and technology will be crucial to balancing reliability with growth.
This historic month signals a turning point in America’s energy story, where innovation and economics are driving a cleaner and more diverse power mix. For the most up-to-date official figures, refer to reports from the US Energy Information Administration (EIA) or Ember.
About The Author
