Division (b): Solar water heaters: - Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device (Text with EEA relevance)

The annual electricity consumption AEC in kWh in terms of final energy is calculated as follows:

AEC = \frac{CC \times Q_{elec}}{Q_{fuel} + CC \times Q_{elec}} \times \frac{Q_{tota}}{CC}

The annual fuel consumption AFC in GJ in terms of GCV is calculated as follows:

AFC = \frac{Q_{fuel}}{Q_{fuel} + CC \times Q_{elec}} \times Q_{tota}

Division (b) Solar water heaters: