The useful question is what changes for users, developers or buyers, and whether the announcement stays industry context or becomes something people can actually use.

ESS Tech, Inc. announced the completion of two iron flow battery systems at the Turlock Irrigation District in California’s Central Valley on May 5, 2026. The project combines solar panels installed above irrigation canals with ESS’s long-duration energy storage technology, aiming to generate renewable electricity while reducing water evaporation. This configuration addresses dual challenges of energy production and water resource management in the region.

The iron flow battery systems use iron, salt, and water as primary materials, providing a safe and sustainable storage solution for stationary applications. ESS stated the technology supports critical infrastructure needs where reliability and flexible energy dispatch are essential. The project demonstrates the practical application of long-duration storage in real-world utility settings.

Turlock Irrigation District’s solar-over-canal initiative is part of a growing trend among water agencies and utilities seeking integrated solutions for energy and water challenges. By pairing solar generation with storage, the project enhances the usability of renewable power while contributing to broader conservation goals.

Drew Buckley, ESS Tech’s Chief Executive Officer, highlighted the project as a milestone for the company and a demonstration of iron flow battery technology’s role in supporting renewable energy integration and infrastructure resilience. The collaboration underscores ESS’s commitment to sustainable and reliable energy storage solutions.