Net-metering describes the offsetting between the produced energy and the energy consumption. This provides the potentiality to the consumer to cover a substantial part of his own loads while at the same time part of the produced energy is able to be indirectly stored to the network.
The cost credit of the consumer is referred to the difference between the consumed and the produced energy during each cycle of counting the consumed energy. The excess energy is credited usually for a year, until it becomes the final account takes place.
These photovoltaic systems can be installed on the roof or in the loft of a building. Energy Efficiency provides a complete solution regarding the optimal positioning of the system, the sizing and the energy study of the system as well as the supply and the installation of the required equipment.