Ihr Spezialist für autonome Stromversorgung, Opto-Elektronik und Energiespartechnik

Stand-alone solar systems

Stand-alone solar power systems like the photovoltaic stand-alone system or solar stand-alone system are static, autarkic, off-grid or mobile systems as well as devices or local networks for electricity supply which can be used all over the country without access to the public power supply system. Such a photovoltaic stand-alone system is mainly used in areas where a connection to the grid is not possible.

The solar system as well as the photovoltaic system run in a so called stand-alone mode. These are autarkic systems different from mobile networks found for example in cars which produce their own energy. However, if there is a backup energy source in the case of a networkís shutdown such a system can switch into stand-alone mode. In most parts of Europe there is a dense electrical grid which leads to the fact that stand-alone systems are mostly small devices with only little electrical consumption. Furthermore the cabling of these devices is extremely time-consuming which leads to the use of solar panels for electrical self-supply. Typical examples are electric fences, automatic toll stations or simply car park ticket machines.

Supply of net alternating voltage via a photovoltaic stand-alone system and a solar stand-alone system

If power consumption is on a very high level so called spark ignition engines or diesel engines with linked generators are used. These allow a land-customary line voltage. However, these firmly installed diesel generators or units do not work for long. After two years first engine-overhauls are to be made. Compared to coal-fired power plants they are also least efficient, especially when consumption is on a very high rate.

Big events with massive energy consumption or remote gas stations and villages are good examples for that. These engines are even used by armed forces and fire brigades. However, also stand-alone systems need a constant frequency of 50 to 60 hertz to sufficiently supply devices using net alternating voltage. This can be achieved by using for example solar modules or accumulators.