Hybrid plants are the combination of two or more systems of power generation, partly conventional (eg, fossil fuels such as gas or diesel) to provide a basis for supply continuity, and partly from renewable sources (wind, photovoltaic, hydroelectric, etc..), complemented by storage systems (batteries), power control and regulation (inverters, rectifiers, charge controllers).

These systems are a sounding solution for electricity needs in remote areas, not connected to the Grid, where in the past were often used diesel generators, with their reduced efficiency of operation, high maintenance costs and a short plant life. Hybrid systems instead represent a way to harness renewable resources existing on the territory and constitute an environmental and social optimized solution. Currently hybrid systems are such that renewable sources and accumulation can provide up to 70%- 80% of energy needs, leaving to traditional fuel engines only a 20% -30% of operation and a full backup function.