Abstract: Co-generating energy sources are controlled using a control system that monitors local and remote data. The local and remote data allow for energy management both in the short and long term by comparing the cost of using the co-generating energy source with other available energy sources. Individual co-generating energy sources can have their data aggregated and combined with remote data to allow for predictions of gross demand for energy. The gross demand can be used by an energy utility to plan for future energy needs and to negotiate with energy providers based upon those needs. The energy utility may control the individual co-generating energy sources so as to most cost-effectively meet the needs of the user of the individual co-generating energy source.