The 'Only wind to CHP' concept is shown in Figure 3. Hydrogen is produced from electricity, through an electrolyser unit, located close to a cluster of households that are equipped with fuel cell systems for combined heat and power supply.

The electrolyser may be used to regulate the electricity grid, and give room for more fluctuating renewable energy as wind power. The size and type of the hydrogen storage need to be discussed (daily / weekly storage).

The electrolyser and the fuel cell are not supposed to operate at the same time since that would convert 2/3 of the electrical energy instantaneously into heat.

The produced hydrogen is stored in a hydrogen storage located close to the electrolyser. The hydrogen is transported through a hydrogen grid from the hydrogen storage to the households. The hydrogen is converted to heat and electricity by a fuel cell CHP in the household.