Thanks to hydrogen’s excellent properties for storing energy, electricity produced in summer can be used seasonally. Excess electricity from the PV system is used for electrolysis during the day. The electrolyser is a module in the picea that uses electrical energy to split water (H2O). In the hydrogen storage tank, these resulting H2 molecules are collected and used in winter to supply your electricity needs with the help of the fuel cell, when the sun no longer provides enough energy.