First of all, what is PWM solar controller and MPPT solar controller, PWM is Pulse Width Modulation, and MPPT is Maximum Power Point Tracking.
Theoretically, the solar power system using MPPT controller will increase the efficiency by 50% compared to the traditional ones, but according to our actual test, the final efficiency can also be increased by 20%-30% due to the influence of the surrounding environment and various energy losses. However, MPPT solar controllers are many times more expensive than PWM controllers. However, because the controller is a one-time investment, the efficiency of the MPPT solar controller is increased by 20%-30%, so the same configuration can save part of the cost of solar panels by using the MPPT solar controller. So in the long run, MPPT solar controller is more efficient and more economical. Therefore, MPPT solar controller will definitely become the trend.
Why do I need a solar controller?
A solar controller is an important part of a solar system. The controller maintains the battery life by preventing overcharging. It limits the current flow from the solar array to the battery when it reaches a 100% state of charge.
So what is the difference?
Essentially, PWM controllers are like electrical switches between the solar panels and the batteries. As they approach full charge, they effectively slow down the batteries, thus keeping them fully charged while removing stress from the batteries.
In addition to the above, the MPPT controller is capable of converting excess voltage to amperage. The benefit of this feature is that it maintains an optimal charge voltage while requiring less time to fully charge the battery. It also reduces power loss as the excess voltage to amperage conversion allows a larger voltage to reach the controller through the panel.
