The performance of a privately owned photovoltaic (PV0 hydrgoen production and storage installation in a onefamily house at Zollbruck i.E. in Switzerland (altitude 630 m, latitude 46.9 deg N) has been stdued. The manually controlled system has operated since 1991 and was built by its owner (M. Markus Friedli) mainly form commercial components. it consists of an array of roof mounted PV solar panels (65 m~2 surface, 5 kW_p average peak power, 8.4 average efficiency), a DC-DC converter (95 efficiency), an alkaline membrane electrolyzer (5 kW, 62 average electrolyzer efficiency), a hydrogen purification unit, a compressor, and two meatl hydride storage tanks, a fixed one (capacity: 15 Nm~3) for in-house storage to operate household appliances running on hydrogen such as a fixed one (capcity: 15 Nm~3) for in-house storage to operate household appliances running on hydrogen such as a stove and a laundry machine, and a mobile one (capacity 16 Nm~3) for running a hydrogen operated minibus. In-situ measurements during operation on three typical summer days and computer modeling based on standard meteorological data suggest a yearly hydrogen production of 1100 Nm~3 (16 Nm~3/m~2 year), corresponding to an average efficiency of 3.6 for converting solar energy into hydrogen fuel for seasonal energy storage.
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