Green electricity represents a major importance of the energy transition. For example, in Germany, the yearly share of renewable energies reaches only 32.2% on average in 2017. However, depending on the season, weather conditions, time and purchase quantities, situations can already arise today where renewables can cover up to 100% of electricity consumption.
Through the growing establishment of renewable energies, which will replace the fossil sources steadily, more and more power fluctuations must be compensated. At the same time the necessity for a base load capability for those volatile volumes raises. In order to be able to maintain this, seasonal long-term storage must be installed, which will supply our society with renewable energy even when there is no wind blowing and no sunshine. Also for the Federal Government in Germany hydrogen and fuel cell technology is a key technology for the transformation of the energy system.
Hydrogen is the only technology that can store large amounts of energy over long periods of time without major losses.
Last but not least it should be recognised that huge amounts of research funding are already being provided for fuel cell technology in order to make the technology cost-effective in relation to its competing climate unfriendly alternatives which are based on oil or coal. Great success has already been achieved in reducing the investment costs of plants and increasing the efficiencies of electrolysers.
Another important and often underestimated aspect of this sector is the energy supply of buildings. Looking at this aspect, hydrogen can also be integrated profitably, since the waste heat which is generated during power generation can be used additionally.