Autonomous photovoltaics (off-grid) are power systems with the help of solar energy. They differ from interconnected photovoltaic (grid-tied or on grid) systems in that no connection to the public grid (eg PPC) is required to operate. Autonomous systems in addition to solar energy can also take advantage of wind, so they are called autonomous hybrid systems.

    Standalone systems usually include batteries (accumulators) and are called standalone storage systems. In these systems during the absence of energy from the sun or wind the load is fed through the accumulators. There are also systems for direct supply of cargo without batteries with the disadvantage of their use only when there is sunshine or windfall and are called autonomous systems without storage.
    Autonomous power supply systems are used in buildings that are remote and therefore costly or impossible to connect to the public network, in watercraft, cottages, caravans, etc.