Photovoltaic systems may be divided into systems connected to the grid and autonomous systems. For the latter, the solar energy exploitation needs to be adjusted to the energetic demand. As the energy produced by the photovoltaic modules is not consistent (most of the times) with the occasional energy demand of a particular consumer, it is imperative to think of a storage system (batteries) and support means to the production of energy (hybrid systems). In the case of systems connected to the grid, the public grid of distribution works as an electric energy accumulator.
Summing up, photovoltaic systems may be of two kinds:
On-Grid – photovoltaic systems connected to the grid:
Off-Grid – isolated photovoltaic systems:
We must also consider the hybrid systems which may be used in the same regimes:
To choice of each of the systems must be careful studied, case by case, according to several aspects.