The system is connected to the national network. A part of the electricity remains for own use, the surplus is transmitted to the Network to reduce the cost of the user. When the electricity generated does not cover the demand, that of the Network will be used.

OffGrid domestic photovoltaic power generation systems are not connected to the national Griad and are used for selfconsumption, which requires a large amount of emergy storage equipment (a set of batteries) to deposit electricity.