Solar Frequency Converter VFD Inverter 7.5KW/5.5KW/4.0KW/3KW/2.2KW DC to AC water pump motor speed controller


145 in stock


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  • Brand Name: CNWeiKen
  • Type: DC/AC Inverters
  • Certification: CE
  • Origin: CN(Origin)
  • Size: 170*126*160
  • Model Number: WK600D
  • Output Frequency: 0-650Hz
  • Output Type: Triple
  • Output Power: 0.75kw/1.5kw/2.2kw/4kw/5.5kw/7.5kw
  • Weight: 2.2KG
  • is_customized: Yes
  • Output Current: 4A/7A/10A/16A/20A/30A
  • Input Voltage: DC 280V-380V / Single phase 220V
  • Output Voltage: Single phase 220V/Three-phase 220V
  • Control Mode: Open loop vector control(SVC) V/F control
  • Communication: RS485
  • 24V Output Voltage: Yes
  • 10V Output Voltage: Yes
  • Relay output: Normally open and normally close
  • Support motor type: AC Permanent Magnet Synchronous Motor

Thank you for coming. You can choose to follow our shop, and the shop will send out coupons from time to time. You can order the inverter after receiving the store discount coupon.

Type selection instructions:

1. Please read the product instructions carefully, choose the type according to the function and power you need, and avoid the damage caused by wrong wiring.
2. This frequency converter can not drive other load types except inductive load such as motor . Please pay special attention to it when purchasing.
3. The total input power of solar DC should be greater than that of photovoltaic converter, and the power of photovoltaic converter should be greater than or equal to the total load power driven by it.
4. The optimum range of DC input voltage can refer to the best input value in the selection table to ensure the most efficient operation of frequency converter and motor. Changing the DC input voltage can be achieved by changing the series and parallel connection of solar panels.
5. The WK600D series solar inverter system is newly upgraded, with additional functions that can drive single-phase motors. Set parameters P0-20=20, P1-00=3,
single-phase motor mode 1. Or P1-00=4, single-phase motor mode 2.

Supplementary Note:

A. If you need detailed version of product manual, you can contact us to send it to you free of charge.

B. If there is no paper product manual in the packing case, it is because of product changes or upgrades. 

Please contact us for the latest and accurate electronic product manual.

wiring diagram 220V 0.75KW-2.2KW

220V 0.75KW

220V 1.5KW

220V 2.2KW

Model NO.




Input voltage

DC 280V-380V (best for 300V-320V) or Single phase 220V±10% 50/60Hz

Output voltage

Single phase 220V or Three phase 0-220V 0-650Hz





Rated current




Shape size

155*82*135 mm

packing size

220*150*130 mm



wiring diagram 220V 4KW

220V 4KW

Model NO.


Input voltage

DC 280V-380V (best for 300V-320V) or Single phase 220V±10% 50/60Hz

Output voltage

Single phase 220V or Three phase 0-220V 0-650Hz



Rated current


Shape size

170*130*160 mm

packing size

225*190*230 mm



wiring diagram 220V 5.5KW-7.5KW

220V 5.5KW

220V 7.5KW

Model NO.



Input voltage

DC 280V-380V (best for 300V-320V) or Single phase 220V±10% 50/60Hz

Output voltage

Single phase 220V or Three phase 0-220V 0-650Hz




Rated current



Shape size

220*152*179 mm

packing size

280*205*245 mm




wiring diagram

Supplementary Note: 

The main circuit terminals R S T are threephase AC input (220V is R T), P+ and N are PV DC input; when input AC, DC must be disconnected and cannot be powered at the same time.

Set the parameters p0-20=20, P1-00=3 or 4, single-phase motor mode,

output V, W to connect to a single-phase 220V motor.

Solar panel configuration recommendations:

220V solar inverter input DC 320V-350V, the best working voltage DC320V,

380V solar inverter input DC 540V-580V, the best working voltage DC540V,

The total power of the solar panel is 1.5 times the power of the motor.


I. Products and Technology

• Built-in MPPT controller:

MPPT: full name "Maximum Power Point Tracking". It can detect the generation voltage of solar panels in real time, and track the maximum voltage and current value (VI), so that the system can output the driving load with the maximum power and apply it to solar photovoltaic system to coordinate the work between solar panels and loads. It’s the brain of photovoltaic systems.

• Supporting Wide Voltage Input;

A, 220V photovoltaic converter corresponding input voltage below 280V will jump low-voltage alarm shutdown, 380V above automatically suppress voltage rise, avoid overlooking overvoltage shutdown;

B, 380V photovoltaic converter corresponding input voltage below 380V will jump low-voltage alarm shutdown, 700V above automatically suppress voltage rise, avoid overlooking overvoltage shutdown.

C, When the input voltage of the solar inverter is too low or too high, the inverter stops working, and resumes work after the input voltage returns to normal, realizing unattended operation in the true sense.

D. The output frequency of the solar inverter is adjusted according to the input DC voltage.

When the voltage is low, the frequency is reduced to reduce the power loss,

so that the motor continues to work at a low speed,

and the output frequency changes after the voltage is restored.

This function has a significant effect on rainy weather or cloudy weather

• Support unattended automatic start and stop.

In the morning, when the illumination intensity rises to a certain extent, the input voltage reaches about 380 V (220 V photovoltaic converter reaches about 280 V), and the photovoltaic converter automatically starts driving load operation without manual operation.

In the evening, when the illumination intensity decreases to a certain extent, the input voltage drops to about 380 V (220 V photovoltaic converter reaches about 280 V), and the photovoltaic converter automatically stops driving the load without manual operation.

• Our products can provide motor protection function.

Such as Short-circuit, phase-absence, over-current, over-voltage, under-voltage, over-heat, over-load protection, etc.

• Details of our products.

  1. 5-digit tube display

  2. High quality Components

  3. DC Heat Dissipating Fan

  4. Isolated aluminium heat dissipation base

• Our product technology

A. Terminal wiring diagram of our products

B. Technical specification for our products

II. Company and Services

• Strict production management

5S Management, Standardized Production and Strict Testing

• Honors of our company

  1. Core Patent Technology

  2. Formal Production Enterprises

  3. CE Certification of EU

  4. Shenzhen High-tech Enterprises


Please note:We are not responsible for any custom duty or import tax!


A. Please make payment by Secure payment in advance and so that we can arrange shipment in time.

B. Please write your detailed delivery address, contact information and phone number on payment. It is very important to deliver package successfully. Please make sure your address in Aliexpress is matched with your shipping address before you pay. Specially, for Russian customer, must write the full name (the first name, middle name, last name). Thanks very much.

C. We are not responsible for any custom duty or import tax. Please check with your country customs office to determine what these additional costs will be before bidding/buying.


Supplementary Note:

A. If you need detailed version of product manual, you can contact us to send it to you free of charge.

B. If there is no paper product manual in the packing case, it is because of product changes or upgrades. Please contact us for the latest and accurate electronic product manual.


A. All package is standard paper box packing or wooden packing for big order.

B. Please note the delivery date using different Express, so please choose the right delivery according to your need.

C. If you prepare to big order ,please contact us if want delivery by any other method.

D. All packages will shipped with a Tracking Number.


Your positive feedback is highly appreciated. We guarantee the quality of our products. Each item will be checked carefully before delivery. Please contact us immediately if there is any reason you feel. We will try our best to satisfy you.

If you are satisfied with our products and service, please kindly leave a positive five star (★★★★★) feedback for us. It is very important for us . Thanks very much in advance.

Contact us

Please contact us first if you have any problems after receiving the goods, we will help you solve the problem, do not submit a dispute immediately, this will affect our shop, thank you. We will reply to your inquiries as immediately as possible. However, please note that we have 12-16 hours time difference with western Europe and 8 hours time difference with USA Therefore, we promise will try best to reply within 24 hours.For bulk orders , please contact us for details. We can give you an appropriate discount.

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