4 kW Solar Pump Inverter, DC/AC Input to 3ph AC Output

3.7 / 4 kW single phase MPPT solar pump inverter, 5 hp solar VFD converts PV array power direct to AC power, DC input to AC 3 phase 220V output or single phase 208v-240v to three phase output, suitable for submersible pumps, surface pumps, swimming pool pumps, etc.
SKU: GK330-004D-1B
Free shipping
Delivery date: 6-12 days

Good performance 4 kW (5 hp) solar pump inverter, using advanced Maximum Power Point Tracking control technology, real-time detection of solar panels power voltage.


Basics Model GK330-004D-1B
Capacity 4 kW (5 hp)
Weight 3.5 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
Single phase AC 220V ±15%
Vmp/Voc voltage VMP≥280V, voc≤400V
Rated input current 34 A
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 17 A
Output frequency 50Hz/ 60Hz (output 0-300Hz please contact us)
DC 270~320V corresponds to 0-50Hz for 220V AC
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: The role of solar pump inverter
The solar pump inverter is the most important equipment in the photovoltaic water pumping system and the soul of the system. The inverter controls and regulates the operation of the PV pumping system, converts the DC power generated by the solar cell array into AC power, drives the water pump, and adjusts the output frequency in real time according to the change of the intensity of the sunlight, realizes the maximum power point tracking, and maximizes the utilization of the solar energy.

Products specifications
Attribute name Attribute value
User Manual

PDFSolar Pump Inverter User Manual

Existing reviews
How to connect a 48VDC or 72VDC source to this 4kW solar pump inverter?
How to connect a 48VDC or 72VDC source to this inverter? Is it possible to use medium voltage DC source with appropriate current as an input of such inverter?
Andrew Bogorodsky | 5/24/2022 2:35 AM
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Responded by
This 4 kW solar pump inverter DC input voltage should be DC 300~350V , or AC Single phase AC 220V ±15%. Also, your pump should be 3-phase, 220/230/240V.
I bought 3 of these 4kW solar pump inverter
I bought 3 of these pumps for my swimming pool. I installed one so far and have been using it for a few weeks. I am very pleased with the 4kW solar pump inverter. It works great so far.
Andres Andres | 6/14/2021 7:20 PM
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