What is the difference between a boost and a buck controller for solar street lights?

my country's new rural construction project has entered the final stage, and many rural areas have been installed with solar street lights. But many people still have this question in their minds: 'Why do some solar street lamp manufacturers use a step-up solar controller, and some use a step-down controller, what is the difference between them?'. With all these questions in mind, let me tell you what is the difference between them.

1. Solar street lamp boost controller

Solar boost controllers are generally connected in series and parallel, which can directly increase the low voltage V or V to about VV, and its voltage is high but the current is relatively low. We need to know that the input voltage of the general solar street lamp boost controller is about V/V, and the input voltage reaches VV, this kind of controller is boosted. Remember that the input voltage of the solar street light boost controller is less than the output voltage.

2. Solar street lamp step-down controller

Solar step-down controllers are generally connected in a series-multi-parallel connection. It reduces the voltage to about V/V through a specific circuit, and the power is W. Its characteristics are opposite to the boost controllers, which are generally low voltage. The current is relatively large. We can see from the parameter label that the input voltage of the step-down controller is V/V, but the output voltage is lower than the input voltage, so this is a solar street light step-down controller.

In short, the input voltage of the solar street light boost controller is less than the output voltage, while the input voltage of the solar street light step-up controller is greater than the output voltage, and their connection methods and power are also different. These are the differences between them. Through the introduction of the above editor, we can also learn to distinguish the buck-boost controller for solar street lights, and hope to help everyone choose a solar controller.