f491b208_SolarWorld___Solar_glossary__o_called_stand_alone_systems__
[Off-grid] On-grid
solar power systems which are connected to a regional electricity grid. When a large amount of electricity is produced due to optimum levels of sunlight, electricity is fed into the grid; electricity can be drawn from the grid if necessary (when it is dark).
SolarWorld : Solar glossary
solar power systems which are not connected to an electricity network. The electricity produced is consumed or stored directly on site (so-called stand-alone systems).