This simulator explores the relationship between forecast error and profit in optimal battery scheduling based on JEPX (Japan Electric Power Exchange) price forecasts.

Select an area, a period, the round-trip efficiency, and the charge and discharge times to see how forecast error relates to profit when the battery's charge/discharge schedule is optimized on JEPX price forecasts. It is not uncommon for even a small improvement in forecast error to make a large difference when measured in economic terms, such as the capture rate. The capture rate is the profit earned by trading optimally on the actual forecasts, expressed as a percentage of the profit that perfectly accurate forecasts would earn (100%).

Reference: Battery Operation Simulator (1): The "Optimizer's Curse" and Guard Bands