California — Lowest Wholesale Electricity Prices in USA

California’s wholesale electricity prices have reached the lowest levels in the United States, driven primarily by the state’s substantial investment in renewable energy sources. According to Professor Mark Z. Jacobson of Stanford University, the California Independent System Operator (CAISO) grid has consistently maintained the cheapest wholesale electricity prices for 2025-26. This achievement underscores the stability and reliability of the grid, which has not experienced any blackouts since 2020, despite the increasing share of wind, water, and solar power in its energy mix. A key factor behind these low prices is the significant contribution of renewable energy to the state’s electricity supply. In 2026, wind, water, and solar power have met or exceeded 100% of the grid’s electricity demand for an average of nearly five hours per day. Remarkably, this clean energy surplus occurred on 125 out of 149 days so far this year, including a streak of 59 consecutive days. These figures highlight the growing capacity and effectiveness of California’s renewable infrastructure in meeting demand reliably and at a low cost. Jacobson’s analysis also points to the broader implications of California’s renewable energy success. While retail electricity prices in the state remain high due to other factors, the wholesale market benefits from the near-zero fuel costs of renewables, which substantially reduce the cost of generating electricity. This distinction is important for understanding the dynamics of electricity pricing and the potential for further cost reductions as renewable energy continues to expand. The stability of the CAISO grid and its ability to integrate a high proportion of renewables without blackouts suggest a promising model for other regions aiming to transition to cleaner energy. As California’s renewable generation capacity grows, particularly during sunnier months, the state is likely to see even greater periods where clean energy meets or exceeds demand. This progress reinforces the role of renewables in not only reducing emissions but also in delivering economic benefits through lower wholesale electricity prices.