Stand-alone photovoltaic systems are systems that are not connected to the public electricity grid. They are generally much smaller than grid-connected systems and they are categorized as follows:
- Systems providing DC power only
- Systems providing AC power through an inverter
- Hybrid systems (diesel, wind or hydro)
In stand-alone photovoltaic power systems, the electrical energy produced by the photovoltaic panels cannot always be used directly. As the demand from the load does not always equal the solar panel capacity, battery banks are generally used. The primary functions of a storage battery in a stand-alone PV system are:
- Energy Storage Capacity and Autonomy: To store energy when there is an excess is available and to provide it when required
- Voltage and Current Stabilization: To provide stable current and voltage by eradicating transients
- Supply Surge Currents: to provide surge currents to loads like motors when required.
A typical stand-alone photovoltaic power system consists of:
- Solar panels
- Charge controller
- Battery bank
- Main switch box
- Consumer loads
- Backup generator
Bienter S.A. having an extensive experience in energy electromechanical projects undertakes the design, procurement and installation of stand-alone power plants taking into consideration the special needs of our clients.