Battery systems a difficult job maintaining reliable service in isolated locations and hostile environments. Demands upon them fluctuate widely and charging depends entirely on irregular and unpredictable weather patterns.

Photovoltaic power supply of
- power plants of remote villages, huts in the mountains.
- signal installations of the air-, sea-, road- and railway transport
- radio relay stations of telecommunication services, cellular phone stations

Hybrid power supply (photovoltaic, wind generator and Diesel engine): In these cases the battery serves to buffer load peaks, to smooth the current and to reduce the operation time of Diesel engines at low power demand.

Photovoltaic power supply of
- telekommunication equipment as micro-wave amplifier, cellular phone stations, television relay installations etc,
- traffic equipment like traffic regulating systems, signal buoys, road lights
- remote weekend houses, fincas, huts in high mountains etc.

Solar and wind powered stations. In these cases the battery serves to buffer load peaks, to smooth the current and to reduce the operation time of
Diesel engines at low power demand.

Photovoltaic power supply of
- isolated weekend houses, camping cars, boots, huts in high mountains etc.
- grid-independent traffic signals like buoys, traffic lights and signals for road and rail services
- radio relay stations of telecommunication services,
- Data measuring stations, water pump stations, street and park illumination.

Small sun- and wind power stations: In these cases the battery serves to buffer load peaks, to smooth the current and to reduce the operation
time of diesel engines at low power demand.