How does it works?
VT Series is a PWM (Pulse Width Modulation) solar charge controller, a device that regulates the voltage and current coming from solar panels to a battery to ensure efficient and safe charging.
PWM Regulation:
1.The controller connects the solar panel directly to the battery but uses rapid switching (on/off pulses) to control the charging process.
2.The duty cycle (width of the pulses) adjusts based on the battery's state of charge.
3.When the battery is low, the pulses are longer (more charging). As the battery nears full charge, the pulses shorten to prevent overcharging.
Voltage Matching:
Unlike MPPT controllers, PWM controllers do not convert excess voltage into additional current.
The solar panel's voltage is pulled down to match the battery voltage (e.g., a 18V panel charging a 12V battery).
Key Features of VT Series PWM Charge Controllers:
1.Simple & Reliable: Fewer components mean lower cost and higher durability.
2.Good for Small Systems: Best suited for systems where the solar panel voltage is slightly higher than the battery voltage.
3.Battery Protection: Prevents overcharging, over-discharging, and short circuits.
4.Multi-Stage Charging: Typically includes bulk, absorption, and float stages for optimal battery health.
Advantages of VT Series PWM Controllers:
✔Built-in Smart management app connect via blue-tooth, Apply parameters setting through mobile app
✔Apply to multi types batteries charge from solar(GEL,SLD,FLD,Lithium-Iron, Lithium-on Batteries)
✔Long lifespan with minimal maintenance
✔Efficient for small-scale systems (e.g., RVs, boats, small off-grid setups)
FAQ（Frequency Asked Answers)
1.Can I use VT Series to charge LIFEPO4 battery?
A:Yes, VT Series PWM charger controller apply to different battery type:Lead-Acid (Flooded, AGM, Gel),Lithium (LiFePO4,Li-on) , You can setting battery type from setting button or mobile app when blue-tooth connected to the controller. When the controller working lithium battery mode, Apply to active the battery Battery BMS.
2. Does temperature affect PWM performance?
A:The controllers have temperature compensation to adjust charging.
3.Can I use a PWM controller with a higher-voltage solar panel?
A:Yes,But inefficiently, A PWM controller pulls the panel voltage down to the battery voltage.
4.How far can mobile app can connect to the controller via blue-tooth?
A:10 meters.
5.What happens if I exceed the PWM controller’s current rating?
A:It may overheat, fail, or shut down.Always size the controller at least 20% higher than the solar panel’s max current.