Off Grid Solar Power Systems, also known as Stand Alone Power Systems (SAPS), are not connected to the electricity grid.
They are commonly used in remote areas where mains power isn’t available.
Off-grid systems can be used for water pumps and greenhouse ventilation systems.
Specialized solar water pumps are designed for submersible use (in a borehole) or to float on open water.
When a certain power output level is required at any time of the day or night, either a storage method is necessary, or the system needs to be combined with another energy supply source such as a diesel generator (see off-grid hybrid systems, below).
Most off-grid systems use batteries to store power during periods of low to zero sunlight.