The autonomous photovoltaic installations come to give immediate and easy solutions in many cases where the connection of a house with the EAC network is impossible or becomes unprofitable.
The purpose of such an autonomous system is to provide electricity to any installation or device, using energy from the sun, without being dependent on any power grid. Such installations are carried out primarily in homes, cottages, warehouses, boats etc.
The ideal size of a stand-alone photovoltaic system depends on the energy needs that will be required to cover and the quality of the materials to be used.
The only “serious” way to set the size, and hence the cost of such a system, is to record in detail the energy requirements and to develop the necessary study.
An autonomous photovoltaic system (stand alone pv system) composed of photovoltaic panels can be combined with wind turbine (creating a hybrid system). Such a system can effectively meet the needs of electricity in a holiday or permanent residence, an office a warehouse or a boat. The energy stored in deep discharge batteries and voltage ranges at 12, 24 Volt or 48V and can provide autonomy from 1 to 5 days!
The autonomous system also includes an inverter to convert the power from 12 Volt / 24V or 48V DC to 220 Volt AC to be used for all appliances like refrigerator, TV, lighting lamps, computers, modem internet, alarm, security cameras etc.)
The sizing is opposite from the classic way for interconnected systems. First we calculate the energy needs required to meet and then the calculation of the system.
For adequate calculation of the appropriate autonomous photovoltaic system is necessary for the engineers to know:
- The consumptions in WATT of each device you use (fridge, TV, lighting, air conditioning …)
- How many hours in use during a 24 hours (eg. 4 hours TV, 5 hours lighting etc.)
- How many operating days (eg. Only weekend or only 5 days of week, etc.)
- Season you use it (eg in summer or winter only or on a daily basis)
- The exact mounting location to calculate the energy