Battery Charging Stages:

The controller has three-stage charging separately: fast charging, maintenance charging, and floating charging. Through the fast, efficient and safe battery charging mode, the system can effectively extend the battery life.

A) Fast charging

The fast-charging battery voltage has not reached full voltage value (i.e.balance/boosting voltage), controller MPPT charging will provide maximum solar power to charge the battery. When the battery voltage reaches a preset value, there will be maintenance charging.

B) Maintenance charging

When the battery voltage value is reached, the controller will conduct constant voltage charging, this process will no longer be MPPT charging, and the charging current also gradually declining as time goes by. The maintenance charge default duration is 0.5h, when the time reaches the set value, the system will be transferred to the floating charging.

C) Floating charge
After the constant charging phase, the controller through reducing the charging current in order to reduce the battery voltage, and keeping the battery voltage in the floating charge voltage setpoint. During the float charging stage, battery charging is very weak, ensure the batteries are fully charged. In the float charging stage, loads can get nearly all of the solar power. If the loads exceed solar power, the controller will not be able to maintain the float charging stage. When the battery voltage is low and then recovers back to the charging set value, the system will exit the float charging stage, re-entering the fast charging stage.

Main Features

• _ MPPT charging mode, peak efficiency up to 99%, saving 30%~60% solar panel than traditional PWM controller.
• _ DC12V/24V/48V battery system automatic recognition, users can use it in different system conveniently.
• _ Maximum PV input voltage up to DC100V.
• _ Three stages charge: fast charge(MPPT), constant voltage charge, floating charge, It can protect batteries well.
• _ Three options of discharge: on mode and off mode and PV voltage(solar) control mode.
• _ Users can choose 4 kinds of commonly standard batteries(Sealed lead acid, Vented, Gel, NiCd). Other kinds of batteries can be defined by users.
• _ Digital tube can display battery voltage and charging current. The software can display various parameters such as model number, PV input voltage, battery type, battery voltage, charging current, charging power, working condition.
• _ RS232 communication, we can offer communication protocol also, it’s convenient for user’s integration management.
• _ This controller can be paralleled infinitely.
• _ CE and RoHS Certifications are approved. We can help clients to approve other certifications.