4 kW Three Phase Solar Pump Inverter

Good quality 3.7 / 4 kW (5 hp) solar pump inverter with MPPT, powered from PV array power and invert it into AC power to drive three phase 380/480V AC water pump, grid and solar energy can be switched, manufacturer direct sale.
SKU: GK330-004D-3B
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Delivery date: 6-12 days

4 kW solar pump inverter, multiple power supply designed solar pump VFD, DC 450v to 750v or AC three phase 230/415/460v input, three phase 0-input voltage output.


Basics Model GK330-004D-3B
Capacity 4 kW (5 hp)
Weight 4 kg
Product dimension 220*183.5*150 mm
Input Feature Input voltage DC 260~350V, recommend DC 300~350V for 3-phase 220/230/240V motor;
DC 450~750V, recommend DC 600~700V for 3-phase 380/400/415/440/460/480V motor
Three phase 220/380/480V AC (±15%)
Vmp/Voc voltage VMP≥560V, voc≤800V
Rated input current 14.6 A at 220V
10.5 A at 380/480V
Input frequency 47~63 Hz
Input power of solar panel About 1.5 times the solar pump inverter rated power
Output Feature Output voltage Three phase 0~rated input voltage
Rated output current 13 A at 220V
9 A at 380/480V
Output frequency 50Hz/ 60Hz (output 0-300Hz please contact us)
DC 270-320V corresponds to 0-50Hz for 220VAC, DC 450-550V corresponds to 0-50Hz for 380/480VAC
Control        Control mode SVPWM, SVC
Motor type Asynchronous motor
Speed ratio Asynchronous motor 1:100 (SVC)
Speed control accuracy ±0.2%(SVC)
Speed fluctuation ±0.3%(SVC)
Torque response <20ms (SVC)
Torque control accuracy 10%(SVC)
Starting torque 0.25 Hz / 150% (SVC)
Overload capability 150% of rated current: 1 minute
150% of rated current: 10 seconds
200% of rated current: 1 second
Running control Frequency setting method Digital settingAnalog setting
Pulse frequency setting
Multi-step speed running settingSimple PLC setting
PID setting, MODBUS communication setting
Shift between the set combination and set channel
Operation method Keyboard/ terminal/ communication
Auto-adjustment of voltage Keep a stable voltage automatically when the gird voltage transients
Fault protection Overcurrent, overvoltage, undervoltage, overheating, phase loss, overload, etc.
Special functions for PV water pumps Maximum power tracking, pre-warning at weak light, auto wake up at strong light,
Pre-warning when full water, auto wake up at low water level,
Underload pre-warning and protection of water level sensor,
When pre-warning, the inverter is in stand-by
Environment Environment temperature -10℃~40℃ (environment temperature is among 40℃~50℃; please use it with derating)
Storage temperature -20℃~65℃
Environment humidity Less than 90 % R.H, not exceeding 90% R.H
Altitude, Vibration Below 1000 m, below 5.9m/s² (=0.6g)
Cooling method Forced cooling and natural air cooling
Enclosure rating IP 20
Warranty 18 months


  • Solar pump inverter adopts advanced MPPT control technology, real-time detection of solar panels power voltage, tracking the highest voltage and current, efficiency is as high as 98%.
  • It can enter automatically to sleep mode when the intensity of sunlight is weak, as well as can exit the sleep mode when the intensity of sunlight is becoming strong.
  • Automatic sleep when on high-water level and automatic restart when on low-water level to realize automatic control through water level.
  • Multiple power supply design, power input can be solar energy photovoltaic DC power supply (DC 260~350V, DC 450~750V), can also be single phase or three phase AC power, simple wiring.
  • Smart operation, water level detection and operation panel to prevent overflow, dry pumping.
  • Protect itself in trouble and improve the reliability of whole system.
  • The bypass- AC source which runs automatically when the sun is Not sufficient or absent.

solar pump inverter wiring application

Tips: Why do you need a solar pump inverter?
The basic principle of solar water pump system is to use semiconductor solar cells to convert solar energy directly into electricity, and then use various motors to drive water pumps for water lifting from deep wells, rivers, lakes and other water sources. In some small and medium power solar pump systems, brushless DC motor is often used as the driving motor, but in some larger power solar pump systems, asynchronous AC motor is also used as the driving motor. In the case of AC asynchronous motor as driving motor, solar pump inverter(solar variable frequency drive) is usually used to control.

Products specifications
Attribute name Attribute value
User Manual

PDFSolar Pump Inverter User Manual

Existing reviews
Intelligent three-phase solar water pump inverter
This three-phase solar water pump inverter just bought is too smart, it can automatically light-sensitive, when the sunlight intensity is weak, it can automatically enter sleep mode, when the sunlight intensity becomes strong, it can exit sleep mode.
Kevin Kevin | 12/29/2020 2:16 AM
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