PWM and MPPT controller are two very popular on the market at present, which is better? What's the difference? Let's make a comparison of the work of the two controllers.

How it works:

The PWM actually acts as a switch, connecting the component to the battery, and the result is that the voltage of the component is pulled down to close to the battery pack voltage.

The MPPT controller is more complex (and more expensive) : it adjusts the input voltage to get the maximum energy from the component, and then converts the voltage to the charging voltage required by the battery, so it cuts the direct connection between the component and the battery, and can charge the low-voltage battery pack from the high-voltage component, such as: The module outputs 36V and can be connected to a 12V battery via MPPT.

Through the principle, we can analyze:

PWM: PWM controllers are a low cost option for small systems and when the solar cell temperature range is between: 45-75 degrees

MPPT: In order to maximize the use of the MPPT controller, the component voltage should be as high as possible than the battery voltage, MPPT is a better choice for larger systems, because smaller cables can be used, resulting in cost reductions, and at low solar cell temperatures (<45>75 degrees) or low light. MPPT controller can absorb more solar energy.

Each controller for the market is different, the pursuit of cost performance is different, but also depending on their own needs to choose.The GW hybrid inverter with MPPT, support 5KW,8KW hybrid.