"This master's thesis is an analysis of the residential fuel cell using hydrogen as fuel. The concept of storing energy obtained from renewable sources is growing more popular, whether on broad scale or smaller scale. It is tied to considerable investments, but once it is operational and amortised, plants of renewable energy and energy storage feature low cost maintenance, and the actual source (Sun, wind, hydro) is yet for free. Residential fuel cells range from 0.7 to 5 kW and have been implemented through national programmes and test phases carry on until 2015 and 2107 resp. This market may develop into a positive direction and spread to more countries. Whether only residential or also communal and commercial buildings may benefit, remains to be seen. This master's thesis analyses the fuel cell from the energetic balance including electrochemical, thermodynamic and kinetic principles, for which an efficiency of 36% was calculated. The ecological consideration has to be thrown into the overall equation, and it is found that while some raw materials are energy-intensive in the manufacturing process, such as graphite, other raw materials need to be transported long distances, such as platinum. The good news is that 50% of a fuel cell today can be recycled. The economic argument stresses that service companies have demonstrated interest to finance the equipment by means of leasing arrangements with a monthly fee paid by the user. A Case study is used to quantify the energy services demand of the single-family household lay with regard to heat, electricity and transportation. The latter is meant in the form of charging E-mobility on the premises, also a trend, and calculating this into the annual PV yield. The house in Tyrol requires 13 kW peak of photovoltaic with an annual yield of 14,600 kWh, calculated by an online tool of the European Union called PVIGS. An excess of 2,500 kWh p.a. is used to run an electrolyser during the Summer season to produce hydrogen which is stored, and used in Winter by the fuel cell to resupply the energy"