Western Energy Imbalance Market (WEIM)

The Western Energy Imbalance Market (WEIM) is a regional effort among Western U.S. states and utilities to improve the efficiency of electricity supply. It allows participating entities to buy and sell excess or needed power in real-time, balancing supply and demand more effectively. This reduces waste, lowers costs, and enhances reliability by coordinating energy trading across borders, making the grid more flexible and resilient. Essentially, WEIM helps ensure that electricity is available when and where it’s needed, while minimizing expensive backup generation and supporting the integration of renewable energy sources.