Each controller is with a FREE usb charging cable!!!
The solar charge controller   is the most important part of the solar system. It is too intelligent and automatically to control the charge, discharge and load of the system. The performance of the controller can influence the stability of the system, especially the lifetime of Battery.  
 
48V 50A Solar Regulator Solar Charge Controller with USB (QWP-VS5048U)
  
Description:
This controller applies in solar photovoltaic systems, which coordinates the working of solar panels, batteries and loads. It adds some protection functions, so that the entire system can be in efficient and safe operation. The extremely low consumption makes this controller suitable for profes-sional applications in telecommunications and traffic management technology.
 
Features:
1.Build-in industrial micro controller.
2.Big LCD display, all adjustable parameter.
3.Fully 4-stage PWM charge management.
4.Build-in short-circuit protection, open-circuit protection, reverse protection, over-load protection.
5.Dual mosfet Reverse current protection, low heat production.
 
Technical Parameter:

Model	QWP-VS5048U
Rated Current	50A
Rated Voltage	48V
Open Circuit Voltage of solar panel	≤100V
Low Voltage Disconnection(LVD)	42.8V
Float Voltage	54.8V
Low Voltage Reconnection(LVR)	50.4V
No load loss	≤30mA
Loop Voltage Drop	≤200mV
Charging Mode	PWM mode
Temperature Compensation	-4mV/Cell/degree
Installation cable area.	≤7# AWG (16mm2)
Operating Temperature	-10 degree~60 degree
Storage temperature	-30 degree~70 degree
Humidity requirements	≤90%,no condensation
Mounting hole spacing	90 mm×178 mm --Φ5

 


What is PWM  controller charge solar?

PWM stands for Pulse Width Modulation. PWM is often used as one method of float charging. Instead of a steady output from the controller, it sends out a series of short charging pulses to the battery - a very rapid "on off" switch.   charger controller application 

The controller constantly checks the state of the battery to determine how fast to send pulses, and how long (wide) the pulses will be. In a fully charged battery with no load, it may just "tick" every few seconds and send a short pulse to the battery. In a discharged battery, the pulses would be very long and almost continuous, or the controller may go into "full on" mode. The controller checks the state of charge on the battery between ulses and adjusts itself each time.

The feature for QWP-VS4024U  controller charge solar?
Thisseries solar charge controller is a kind of intelligent,multipurpose solar charge/discharge controller,the customized LCD display is used in this product,the interface is easy to operate,the parameters can be set neatly to satisfied your varied requirement.

FAQ
1. Q: Are you a factory or trading company?
A: We just want to tell you we can offer you good prices, professional service, professional english communication, professional after-sales service. And we are a factory.

2. Q: What certificate do you have?
A: We have CE,ROHS certificate.

3.Q:What kind of payment do you accept?
A:We accept T/T,Escrow,Western Union for samples' order,only T/T for big orders.

4.Q:Do you have any MOQ?
A:we don't have MOQ for mid-brand packing,if need your design it has 300pcs to 1000pcs.

5. Q: How does your factory do regarding quality control?
A: We have a special QC department in charge of products' quality.

6. Q: How long is the warranty period?
A: All of our products have one year warranty.

7. Q: What's the main market of your company?
A: We have customers all over the world.

8. Q: How long will the products'delivery?
A: for samples'order will 3-10days,big orders are from 30-45days.
 
Guangzhou Queenswing Solar Energy Co. Ltd. Is a professional manufacturer and exporter of solar products including power inverter, solar charge controller, solar panel and solar battery in China. To provide high-quality product and considerate service is always our basic policy. We believe high quality creates business and progress is from improvement.


Main products:
Pure sine wave power inverter
Modified sine wave power inverter
UPS power inverter with charger
Car power inverter
Solar charge controller
Solar panel
Solar battery

Our power inverter and solar products are exported to most global coutries and get good reputation because of our favorable quality and stable performance.

7. Payment Terms:
T/T, Western Union, Money Gram
Production arranged after receipt of payment.

Lead Time:
Sample order will be delivered within 7 working days.
Order quantity below 100PCS, delivery time is 7-15 working days.
Container order will be delivered within 15-30 working days.

Shipment:
Courier: FedEx, DHL, TNT, UPS, Aramex, EMS ect.
Forwarder: By sea / air or Customer designated