How To Choose The Right Controller Of Solar Street Light System?

Road lighting is an important municipal supporting facilities, now many solar street lights has become the preferred scheme of road lighting.Careful friends notice that the solar street lamp will automatically open when it is dark at night, which is about to talk about the controller of solar street light system.

The solar controller is used in the solar photovoltaic system, its full name is solar charge and discharge controller, coordinate the work of solar panel, battery, load, is a very important component in the photovoltaic system,which makes the whole solar photovoltaic system efficient and safe operation. The controller in the solar street light system is the core accessory that connects the battery, the panel and the LED street light.To make the solar street light system run normally, the controller that matches with the system must be selected.

As a controller of solar street light,it should have these basic functions:Overload protection,Short circuit protection,Reverse discharge protection,Polarity reverse connection protection,Lightning protection,Under voltage protection,Overcharge protection ,Load startup restore Settings,Maximum Power Point Tracking (MPPT).

How to choose suitable controller for solar street light?

Firstly,controller with low power consumption should be chosen.The controller works continuously for 24 hours. If its own power consumption is large, part of the electric energy will be consumed. It is best to choose the controller whose power consumption is less than 1 milliampere.

Secondly,choosing a controller with a high charging efficiency.A controller with an MCT charging mode can automatically tracks the maximum current of the panels, which is about 20 percent more efficient, especially during winter or poor sunlight.

Thirdly,the controller with power regulation should be selected.Controllers with power regulation have been widely promoted. They can automatically turn off one or both lights at night to save electricity when pedestrians are scarce. They can also adjust the power of LED lights.

The match of controller and panel

The maximum voltage and maximum charging current borne by the solar end of the controller should be greater than the maximum open circuit voltage and maximum charging current of the panel, which requires the power of the panel to be within the range that the controller can bear.

The Match of the controller and battery

Select or set an appropriate controller according to the type of battery (lithium battery or colloidal battery)(Lithium battery system must set the overshoot and overdischarge voltage of the controller according to the voltage parameters of lithium battery).Select proper controller based on the battery voltage (12V/24V). (some controllers only support 12V batteries.)

The match of controller and LED street light

According to the type of street lamp to choose the appropriate controller: boost crossflow controller, buck crossflow controller, constant pressure controller, etc. Then, according to the power of LED street light, working voltage and current, select the controller whose output electrical parameters meet the requirements (output voltage range, output power range, load current setting range)

The size of the controller and the ambient temperature should also meet the installation requirements and use environment of the LED solar street lamp.