Solar controller, used in solar photovoltaic system, coordination of solar panels, batteries, load work is a very important component of the photovoltaic system. The controller is different from other solar controllers, adding comprehensive protection features that make the entire solar photovoltaic system efficient and safe operation.
In off-grid PV systems, solar charge-discharge controllers that are used to protect battery overcharge and over discharge and extend battery life are essential. After years of development, pulse width modulation (PWM) type charging controller technology has been very mature. However, we found that in actual cases, the amount of electricity generated by a photovoltaic power station after operation is often lower than the original design value of the building, which not only results in system waste but also brings a lot of inconveniences to the application.
How to solve this problem reasonably presents a challenge for everyone. Some may increase the amount of power generated by designing larger solar panels, but this result will inevitably increase the system cost even more. Is there a way to increase power generation without increasing system costs?
MPPT controller is undoubtedly a good choice. The so-called MPPT (Maximum Power Point Tracking) is the maximum power point tracking.
The maximum power point tracking controller is designed in the controller can be a smart computing and tracking devices at any time to achieve real-time monitoring of solar panels generate voltage and tracking the highest voltage and current values(VI), by the output of the highest point Power, so that the system with the highest efficiency of the battery charge.
We know that in order to charge a battery, the output voltage of the solar panel must be higher than the current voltage of the battery. If the voltage of the solar panel is lower than the voltage of the battery, the output current will approach zero. Moreover, the output of solar panels is not fixed, but with the radiation intensity, ambient temperature and other conditions change curve, and can make the solar panel always work in the maximum IV curve, then reflect the different designers Level and ability.
The traditional solar charge controller its working parameters is set, it set the parameters of the way (or to constant voltage, or constant current) for the solar panel power transfer will not be based on changes in the surrounding environment Change; and solar radiation, ambient temperature and humidity of these natural environment is changing all the time; therefore, to a fixed way to convert the energy of the solar panel, on the one hand is likely to cause the battery is always in full dissatisfaction On the other hand, it is not possible to make full use of solar panels when the weather is good, resulting in waste.
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