1. The voltage of the direct charging protection point of the pwm solar charge controller: direct charging is also called emergency charging, which belongs to fast charging. Generally, the battery is charged with high current and relatively high voltage when the battery voltage is low. However, there is a control The point, also called the protection point, is the value in the above table. When the battery terminal voltage is higher than these protection values ​​during charging, the direct charging should be stopped.

2. The voltage of the equalizing control point of the pwm solar charge controller: after the direct charge is completed, the battery will generally be left for a period of time by the charge and discharge controller to let its voltage fall naturally. When it falls to the "recovery voltage" value, it will enter the equalization charging status.
3. The voltage of the floating charge control point of the pwm solar charge controller: generally, after the equalizing charge is completed, the battery is also left for a period of time, so that the terminal voltage naturally falls, and when it falls to the "maintenance voltage" point, it enters the floating charge state At present, PWM (pulse width modulation) method is adopted, which is similar to "trickle charging" (ie, small current charging). In order to prevent the battery temperature from rising continuously, this is very good for the battery, because the internal temperature of the battery has a great influence on the charge and discharge.
4. Termination voltage of over-discharge protection of pwm solar charge controller: This is easy to understand. The battery discharge cannot be lower than this value, which is the national standard.