In a Stand-alone system the demands in energy are exclusively fed by a solar energy system. However, we can distinguish one more category, the hybrid systems, in which other sources of electrical power like wind power or a diesel generator coexist.

- A Stand-alone photovoltaic system is a power station consisting exclusively of photovoltaic generators. These systems can be separated into systems that have an energy storage installation (usually batteries) and systems that are connected with the fed loads without an energy storage installation.

1. Hybrid power systems. This kind of system is usually chosen due to the cost. Technologies that can take part in a hybrid installation are usually photovoltaic generators, wind generators and diesel generators. In these cases the power sources are placed coupling in parallel with the local grid, in order to provide electricity continuously. The choice of such a system comes from a conflation of meteorological and financial facts.