QuESt Planning is a long-term power system capacity expansion planning model that identifies cost-optimal energy storage, generation, and transmission investments while evaluating a broad range of energy storage technologies. The United States is adding 86 gigawatts of new power capacity in 2026, nearly double the previous year's total, according to data from the Energy Information Administration. Solar, wind, and battery storage will account for 79 percent of all new generating capacity, while fossil fuel plants. U. power grid in 2026 in the latest Preliminary Monthly Electric Generator Inventory report from the U. Energy Information Administration, a record if realized. The. However, battery energy storage technologies have complex cost, value, and performance characteristics that make them challenging to model in long-term power system capacity expansion models. Key Learning 1: Storage is poised for rapid growth.
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