How to set up solar charge and discharge controller

Solar charge and discharge controller setting guide achieves efficient energy management. As the core component of the solar power generation system, the solar charge and discharge controller is responsible for intelligent management of the charging of solar panels and the discharge of batteries. In order to give full play to the performance of the solar charge and discharge controller, reasonable setting of parameters is crucial.

1. Understand the basic functions of solar charge and discharge controllers

Before setting up the solar charge and discharge controller, we first need to understand its basic functions:

Charging management: Perform maximum power point tracking (MPPT) or pulse width modulation (PWM) charging on solar panels to improve charging efficiency.

Discharge management: Set appropriate discharge parameters according to the status of the battery to avoid excessive discharge and extend the service life of the battery.

Load control: Control the switching of loads (such as street lights) according to set time or light intensity parameters to achieve energy saving.

2. Set charging parameters

The charging parameter settings of the solar charge and discharge controller mainly include charging mode, constant charging voltage, float charging voltage and charging current limit. Depending on the controller model and battery type, the setting method may be slightly different. Here are the general setup steps:

Select charging method: Select maximum power point tracking (MPPT) or pulse width modulation (PWM) charging method according to the controller model. MPPT charging efficiency is higher, but the cost is higher; PWM charging cost is lower and suitable for small systems.

Set the constant voltage charging voltage: usually about 1.1 times the rated voltage of the battery. For example, for a 12V battery, the constant voltage charging voltage can be set to 13.2V.

Set the float charge voltage: usually about 1.05 times the rated voltage of the battery. For example, for a 12V battery, the float charge voltage can be set to 12.6V.

Set charging current limit: Set the charging current limit value according to the battery capacity and solar panel power. Under normal circumstances, it can be set to 10% of the battery capacity.

3. Set discharge parameters

Discharge parameter settings mainly include low-voltage power-off voltage, recovery voltage and discharge current limit. Here are the general setup steps:

Set the low-voltage power-off voltage: usually about 0.9 times the rated voltage of the battery. For example, for a 12V battery, the low-voltage power-off voltage can be set to 10.8V.

Set the recovery voltage: usually about 1.0 times the rated voltage of the battery. For example, for a 12V battery, the recovery voltage can be set to 12V.

Set the discharge current limit: Set the discharge current limit value according to the load power and system safety requirements. Generally, it can be set to 1.2 times the load power.

4. Set load control parameters

Load control parameters mainly include on and off conditions. For different application scenarios, you can choose time control or light intensity control:

Time Control: Set loads to turn on and off during specific time periods. For example, it opens at 19:00 in the evening and closes at 6:00 in the morning.

Light intensity control: Set the threshold for the load to automatically turn on and off based on the actual light intensity. For example, it turns on when the light intensity is lower than 10lx and turns off when it is higher than 30lx.

5. Things to note

When setting the parameters of the solar charge and discharge controller, please pay attention to the following matters:

Please refer to the product manual for settings based on the specific controller model and battery type to ensure stable operation of the system.

Please ensure that the rated voltages of the controller, solar panels and batteries match to avoid equipment damage due to mismatched parameters.

During use, please check the system operating status regularly and adjust parameters in time to adapt to different seasons and environmental changes.

Setting reasonable parameters for the solar charge and discharge controller can help improve the operating efficiency of the system and extend the life of the battery. By mastering the setup methods described in this article, you can achieve efficient energy management of your solar power generation system and contribute to the green environment.