The cost of the MPPT controller is higher than that of the PWM controller, even several times that of the PWM controller, but the charging efficiency of the MPPT controller is higher, and the MPPT controller is higher than the PWM controller at low temperature. In addition, the MPPT controller can also support more photovoltaic panels to be connected in series. Generally speaking, the MPPT controller can make the photovoltaic panels utilized to a greater extent.

The charging efficiency of the PWM controller is lower, usually between 65% and 85%, and the utilization rate of the components is also relatively low, but its cost is relatively much cheaper, and the circuit is relatively simple and reliable, which is more suitable for small power generation. system, and for large systems, if you want better economics, using MPPT controllers is a better choice. For example, if there is a 1000W solar panel, the MPPT controller can convert 1000W of electricity, then the PWM controller can only convert about 700W of electricity. If you want to achieve the same efficiency as the MPPT controller, you need to add Installing a solar panel will increase the cost of a solar panel. If the installation space is limited, if you want to make the conversion efficiency reach 1000W, you need to use an MPPT controller.