Solar Generation in CAISO Surpassed Natural Gas in the First 5 Months of 2026
cleantechnica.com Jun 18, 2026

Solar Generation in CAISO Surpassed Natural Gas in the First 5 Months of 2026

AI-summarised brief · reviewed before publication

Utility-scale solar generation in the California Independent System Operator (CAISO) surpassed natural gas generation in the first five months of 2026. Solar electricity generation increased by 21% compared to the same period in 2024, while natural gas generation decreased by 60%. Solar generation outpaced natural gas on 82% of days, up from 21% in 2024 and 2025. The growth in solar and battery storage capacity, while natural gas capacity remained flat, contributed to this shift.

💡 Why It Matters

  • · The significant increase in solar generation and corresponding decrease in natural gas generation highlights the accelerating transition to renewable energy sources in CAISO, driven by growing capacity and decreasing costs.
  • · This shift has major implications for the region's energy mix and grid resilience.