The small power MPPT controller is a solar off-grid system with the maximum power tracking technology controller, the controller is characterized by intelligent tracking algorithm to obtain the maximum power point of solar modules, can prevent excessive discharge of the battery caused by damage. The basic forms of photovoltaic system applications can be divided into two categories: independent power generation system and grid-connected power generation system. The main fields of application are mainly in space aircraft, communication systems, microwave relay stations, television turntable, photovoltaic pumps and power supply in areas without electricity.
With the development of technology and the need for the sustainable development of the world economy, developed countries have begun to systematically promote urban photovoltaic grid-connected power generation, mainly the construction of household rooftop photovoltaic power generation system and MW class centralized large-scale grid-connected power generation system, while promoting the application of solar photovoltaic system in transportation and urban lighting.
The photovoltaic system consists of the following three parts: solar cell modules; Power electronic equipment such as solar charging and discharging controllers, inverters, test instruments and computer monitoring, and batteries or other energy storage and auxiliary power generation equipment. The MPPT Solar Controller uses the highest power point tracking technology to extract the maximum power from the solar array to charge the battery. The maximum power point tracking method is completely automatic and does not require user adjustment.
When the maximum power point of the array varies with environmental conditions, the controller automatically tracks the maximum power point of the array, ensuring that the maximum energy of the day is obtained from the solar array. In most cases, the maximum power point tracking technology will "increase" the charging current of the solar power generation system. For example, a system may have a 8 ampere current flowing from a solar array into a MPPT solar controller, with 10 amperes of current flowing out of the MPPT Solar controller to the battery. MPPT Solar Controller does not generate current!
The energy of the input MPPT Solar Controller is equal to its output energy. Factors that limit the efficiency of the maximum power Point tracking controller. The vmp of the solar photovoltaic array decreases as the temperature of the array increases. In hot weather, VMP may be close to or even lower than the battery voltage. In this case, the MPPT Solar Controller will have little or no access to energy compared to conventional controllers. However, as long as the nominal voltage of the system photovoltaic module is higher than the battery group voltage, the VMP of the photovoltaic module will always be higher than the battery voltage. In addition, by reducing the current of the solar array, the wiring is saved, making the MPPT Solar controller have a clear advantage even in hot weather.