![]() They also convert the electrical energy into stored chemical energy for use when the solar array is not producing power. Thin telephone or bell wire will not work!īatteries are an important element and the heart of any stand alone solar power system, whether that is one using a large array of panels to power a home or a small pico solar system used to power the garden, shed or fish pond.īatteries are needed because of the fluctuating nature of the output being delivered by the PV panels or array. The cables need to be correctly rated for the voltage and power requirements. Wiring – The final component required in and PV solar system is the electrical wiring.Inverters are used to convert the 12V, 24V or 48 Volts direct current (DC) power from the solar array and batteries into an alternating current (AC) electricity and power of either 120 VAC or 240 VAC for use in the home to power AC mains appliances such as TV’s, washing machines, freezers, etc. Inverter – The inverter can be another optional unit in a stand alone system.Fuses and Isolation Switches – These allow PV installations to be protected from accidental shorting of wires allowing power from the PV modules and system to be turned “OFF” when not required saving energy and improving battery life.Charge controllers within a stand alone PV system are optional but it is a good idea to have one for safety reasons. Charge Controller – A charge controller regulates and controls the output from the solar array to prevent the batteries from being over charged (or over discharged) by dissipating the excess power into a load resistance. ![]() Depending upon the solar array configuration, battery banks can be of 12V, 24V or 48V and many hundreds of amperes in total. Batteries are used to store the solar-produced electricity for night time or emergency use during the day.
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