Localised energy systems featuring distributed generation technologies such as combined heat and power and photovoltaics present a significant integration challenge due to simultaneous generation of both thermal and electrical energy. Control of energy storage provides a potential solution to this problem by absorbing surplus energy production and providing extra energy if the balance is in deficit. This paper presents a multi-input multi-output (MIMO) error actuated method of controlling distributed energy storage for localised energy systems featuring a combined heat and power engine plus building integrated solar PV array with twin objectives of maintaining a defined operative temperature while simultaneously maintaining a prescribed electrical profile. Impact of IT and emerging integrated DC systems in buildings, including ICT and LED lighting are considered. Performance of the control strategy is assessed using heat demands generated by calibrated commercial building models for a single zone developed in a Matlab/ Simulink environment. Results are presented and discussed in context of integrated CHPV systems design and operational performance against conventional heat and power systems.