California’s Grid Milestone

Solar Overtakes Natural Gas as Clean Energy Surges

California’s energy landscape is undergoing a structural shift. Data from the US Energy Information Administration (EIA) confirms that utility-scale solar generation in the California Independent System Operator (CAISO) footprint surpassed natural gas in the first five months of 2026. 

Hard not to see this as a systemic transformation of the state’s grid. 

A rapid transition

Compared to 2024 in the same period, solar generation in the CAISO region climbed by 21%. Electricity generated from natural gas has plummeted by 60%. While gas capacity is rather steady, its utilization withers in the face of greener options. 

The state’s massive investment in energy storage plays no small role here. Between April 2024 to April 2026, California’s battery storage capacity shot up by 79%. This essentially displaces the need for gas-fired “peaker” plants. 

“Batteries allow for clean electricity to effectively be extended into the evening hours, eating into the market share that has traditionally been met by gas-fired power,” – Coverage from Gas Outlook.

However, local storage is only half the equation. Despite a 7% uptick in overall electricity demand, CAISO’s internal net generation actually dropped by 19%. The slack was taken up by a doubling of cheap electricity imports from neighboring states. 

Beyond the day shift 

California is a consistent net importer of electricity, drawing particularly from renewable projects from neighboring states. So there’s a broader trend at play here, with the state relying on a diverse, decarbonized mix. 

In fact this influx of clean energy made “100% renewable days” a common occurrence. Data tracked by Stanford University professor Mark Jacobson showed that in the first 168 days of 2026, renewable energy met 100% of the grid’s demand for at least a portion of the day on 143 occasions. 

What comes next?

Momentum is only building. The EIA reports that developers have aggressive plans for the near term. Especially with roughly 10.5 GW of additional battery storage and 8.3 GW of new utility-scale solar capacity in the pipeline. 

Can’t understate the progress in the utility market. Yet decarbonizing the power sector is only one piece of the puzzle, as industrial & residential natural gas consumption remains a challenge. 

Still the golden state does prove that a carbon-light grid is well on its way. 

“This is what we wanted,” said Lucas Davis, a professor of Economic Analysis & Policy at UC Berkeley –

“This is why California has promoted solar and more recently batteries for so many years. It was because we wanted to reduce carbon dioxide emissions. And it’s pretty impressive.”