Idaho is at a pivotal moment in shaping its energy future. As demand for electricity continues to grow and extreme weather events put increasing pressure on our power grid, the need for flexible, reliable, and clean energy resources has never been greater. That’s why the Idaho Conservation League (ICL) is voicing support for Idaho Power’s recent proposal to build two new Battery Energy Storage System (BESS) facilities totaling 100 megawatts (MW) of dispatchable capacity. We have weighed in with the Public Utilities Commission, urging that they approve Idaho Power’s recent application.
Battery energy storage isn’t just a promising idea—it’s a proven solution that’s already powering cleaner, more resilient grids across the West. In fact, Idaho is currently behind many of our neighbors when it comes to adopting large-scale battery storage. California leads the nation with more than 13,000 MW of installed battery storage capacity, while Arizona has over 1,400 MW online or in development. Nevada and Oregon are also moving quickly, with each having more than 500 MW of battery storage either operational or in the queue. These states have embraced BESS as a critical tool for managing peak demand, supporting renewable energy integration, and enhancing grid reliability.
So what makes battery storage so valuable?
First, BESS systems are fast, flexible, and clean. Unlike traditional peaker plants (i.e. generation that sits idle until it is needed to come online during periods of high, or “peak” demand) that burn fossil fuels, batteries can charge using excess renewable energy—such as solar or wind—and dispatch that energy quickly when it’s needed most, like during hot summer evenings when air conditioners strain the grid. They provide immediate frequency response and grid regulation, helping maintain power quality and reliability without the carbon emissions or air pollution.
Second, battery storage is cost-effective. As the technology has matured, the cost of utility-scale battery systems has declined significantly. Studies have shown that BESS can outperform fossil fuel-based peaker plants in both speed and efficiency while reducing long-term costs for utilities and their customers. This makes them a smart investment for Idaho’s energy future.
Third, battery systems improve grid resilience. As we face more extreme weather and wildfire threats, Idaho’s grid must be prepared for sudden disruptions. Battery storage can act as a buffer, providing critical support during emergencies, and even enabling a quick restart of the grid if a major outage occurs.
While battery storage alone won’t meet all of Idaho’s growing energy needs, it plays a vital role in the clean energy mix. It complements renewable generation, reduces dependence on fossil fuels, and lays the foundation for a smarter, more adaptable energy system.
We at ICL believe this proposal is a step in the right direction. By investing in battery storage, Idaho Power is helping ensure that Idahoans continue to enjoy affordable, reliable electricity—while moving toward a cleaner, more sustainable energy future. Let’s catch up with our neighbors and make the most of the opportunities that BESS offers. Our grid—and our environment—will be stronger for it.
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