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what is the difference bettwen PWM Solar Controller and MPPT Solar Controller?

PWM Solar Controller vs MPPT Solar Controller

What’s Best for Your system? PWM Solar Controller or MPPT Solar Controller?  Fist of all, let's talk about what is PWM and MTTP. PWM is short of Pulse Width Modulation (PWM). MPPT is short of Maximum Power Point Tracking. Theoretically, the solar power generation system using MPPT controller will be 50% higher than the traditional efficiency, but according to our actual tests, due to the impact of the surrounding environment and various energy losses, the final efficiency can also be increased by 20% -30% .But MPPT solar controllers are many times more expensive than PWM controllers. However, because the controller is a one-time investment, the efficiency of using the MPPT solar controller is increased by 20% -30%, so using the MPPT solar controller in the same configuration can save a part of the cost of solar panels. So in the long run, MPPT solar controllers are more efficient and more economical. Therefore, the MPPT solar controller is bound to become a trend.


Why do you need a solar controller?

A solar controller is an essential component of your solar system. The controller maintains the life of your battery by protecting it from overcharging. When your battery has reached a 100% state of charge, it limits the current flowing into your batteries from your solar array.


So what is the difference?

A PWM Controller is, in essence, like an electric switch between the solar panels and the battery.  They are effective in slowly lowering the amount of power going to your batteries as they get closer to fully charged, thus keeping them at a fully charged state while eliminating the stress on your batteries.

In addition to the above, an MPPT Controller is also capable of converting excess voltage to amperage. The benefit of this feature is it keeps an optimal charge voltage while requiring less time to fully charge your batteries. It also allows for reduced amounts of power loss as the conversion of excess voltage to amps allows for greater voltage to travel through the panel to the controller.
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