Classification of the solar controllers
The popular solar controllers on the market mainly include ordinary solar controllers, PWM solar controllers and MPPT solar controllers.
Ordinary solar controller is the first generation technology. The working principle is to directly hang the output of the solar panel to the battery port. When the battery is sufficient, it will be disconnected. Because of the internal resistance of the battery, it is difficult to fill the battery, and the solar panel not fully utilized, the charging conversion efficiency is only 70% to 76%, has been eliminated by the market, and is rarely used.
PWM solar controller is the second generation technology. Now it is the most on the market. The working mode is PWM control. Compared with ordinary solar controllers, it has improved a lot. It can solve the problem of battery dissatisfaction. The charging conversion efficiency is 75~80%. But the solar panels are not fully utilized.
The MPPT solar controller is the third generation technology, the highest-end solar controller. MPPT solar controller refers to the solar controller with "Maximum Power Tracking" function, which is an upgraded product of PWM solar controller. MPPT solar controller can detect solar panel voltage and current in real time and keep track of the maximum. Power (P=U*I), the system always charges the battery with maximum power. The MPPT tracking efficiency is 99%, the whole system has a high power generation efficiency of 97%, and has excellent management of the battery. It is divided into MPPT charging and constant. Pressure equalization and constant voltage float charging. With advances in technology and energy savings, the trend of replacing traditional PWM solar controllers with MPPT solar controllers is irreversible.