Abstract: Method for managing electric power generated during periods of low demand, in an electric power market where consumption of electric power exhibits periods of different demands. The method includes upgrading solid fossil fuel by electromagnetic radiation (EMR) upgrading during the periods of low demand, storing and utilization of the upgraded fuel. Fuel utilization may include burning for electric power generation during periods of high demand, burning in another heat-consuming industrial process, or trading the fuel with another business entity. The EMR upgrading used in the method includes reducing the inherent moisture content in the upgraded fossil fuel at least in half.