1. M. Duerr, A. Cruden, Design of an alkaline fuel cell based combined heat and power system for domestic application, in: 13th International Universities Power Engineering Conference, September 2002, Proceedings, vol. 1, pp. 14–18.
2. K. Klinder, Development and status of plug power/vaillant fuel cell heating, pp. 128–135, in: H. Raak, R. Diethelm (Eds.), The Sulzer Story: From Demonstrators to Commercial Products, pp. 425–433, Proceedings of “The Fuel Cell World” Conference, Lucerne, 1–5 July 2002, Fuel Cells for Power.
3. Demand modulation for micro-CHP systems;Newborough;Power Eng. J. IEE,1999
4. G. Cacciola, Low environmental impact energy source: fuel cells, Consiglio Nazionale delle Ricerche (CNR) Report, Italian National Council, Rome (1), vol. 42, 2000.
5. Up to date price information of batteries from Solarbuzz Inc., 2004, http://www.solarbuzz.com/Batteryprices.htm.