Alternatively a photovoltaic installation constitutes an independent system which covers the total need for power of the building or cottage house. In that case there is no connection to the PPC network. So, with that kind of system the client is power independent and autonomous in any peculiarity that the network may present (a blackout or inconstant voltage).
For the continuous convenience of the consumer, the installation should include a unit of storage accumulator (battery) for the energy administration. These kinds of systems are generally installed in remote buildings and houses far from the PPC network. Such an investment proves in the long term to be considerably inexpensive compared to the alternative solution of the generator.