What is the distinguishing feature of MPPT solar controller?

The MPPT controller using maximum power point tracking technology to extract maximum power from solar array for battery charging. Maximum power point tracking methods completely automatic, does not require users to adjust. In the array maximum power point according to the environmental conditions change, the controller automatically array maximum power point tracking, ensure that derives from the solar array maximum energy in a day. The advantages compared with the traditional controller of charging the solar array directly to the traditional controller connected to the battery. This requests the solar array is usually lower than the Vmp voltage within the scope of operation. In the 12 v system, for example, storage battery voltage range is usually 11 - 15 V, but the Vmp voltage of solar arrays is usually about 16 or 17 V. Due to the traditional controller does not always operate in photovoltaic array Vmp, energy is being wasted, so the energy could have used for battery charging and supply power to the system load. Battery voltage and photovoltaic array of the greater the difference between the Vmp, the more energy is wasted. Will always be in the running of maximum power point, compared with the traditional controller to reduce the energy waste. Limit the maximum power point tracking controller efficiency factors of solar photovoltaic array Vmp will decrease with the temperature rise of array. In hot weather, Vmp is likely to be close to or even lower than the battery voltage. In this case, compared with the traditional controller, the controller will be little or can hardly obtain energy. However, as long as the system of photovoltaic modules of the nominal voltage higher than the battery voltage, photovoltaic modules of Vmp is always higher than the battery voltage. In addition, due to the current reduced the solar array, make the wiring to save, so that the MPPT controller even in the hot weather has obvious advantages.
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