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  • SG320 solar pump inverter

  • SG320 solar pump inverter

  • SG320 solar pump inverter

  • SG320 solar pump inverter

SG320 solar pump inverter

Drives well AC pump in solar pumping system. Solar DC and Grid AC input.

Mainly used in the field of agriculture, forestry, irrigation, desert control, grassland animal husbandry, urban water and so on


  • Features
  • Specification
  • Model Selection
  • Wiring
  • Application
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Solar Water Pumping Solution is a fully automatic system designed to provide water at affordable cost for people with limited or no access to electricity. It uses the most advanced SG300/320 variable speed drive to regulate the speed of a 3-phase AC motor depending upon the solar energy available from the solar panel.


Fully automatic system using variable speed drive compatible with AC, 1 /3-phase, submersible and surface mount pumps, and high efficiency PMSM Pumps.

The system is composed of a PV generator, a pump and a solar pump drive. Based on the design philosophy that it is more efficient to store water rather than electricity, there is no energy storing device such as storage battery in the system. The system is prepared to be combined with a elevated water storage, e.g. water tower or an uphill tank installation.


Advantages of SG300/320 solar pump inverter

♢ Maximum power point tracking (MPPT) with fast response speed and stable operation

♢ Enable to drive for 1 phase AC pumps or 3 phase AC pumps

♢ Enable to drive for PMSM high speed and high efficiency pumps without motor ID auto tuning

♢ Dry run (under load ) protection, lowest speed auto tuning , Pumps maximum current protection, Minimum power input protection...

♢ The PQ (power/flow) performance curve enables to calculate the flow output from the pump

♢ Dual mode AC and DC power supply input is available

♢ Digital signal of water level sensor and analog signal of water level sensor for water tank fulling detect.

♢ Dedicated hardware design with dual CPU, independent air duct design

♢ Import IGBT module such as Infineon, Fuji,TYCO to ensure good quality

♢ Enhanced lightning protection module

♢ GPRS remote control module for distance monitoring, control, parameters modification, and history data record..

♢ Efficiency is higher than 99.5%, power factory not less than 0.96 for below 15kw inverter.


**Solar pump drive specification when FA-00 set to 1&2 for solar pumping controlling function.
Recommended MPPT voltage range1S: 80VDC to 450VDC, for 3 phase 110V/220VAC pumps, ( system can work just with 3 panels2S: 150dc to 450vdc, for 3 phase 220vac PM and induction pumps 4T: 250vdc to 900vdc, for 3 phase 380vac to 480vac pumps.
Motor type ( Pumps type)Control for permanent magnet synchronous motor and asynchronous motor pumps. (PMSM and AM) 1 phase or 3 phase AC pumps
Rated output voltage3-Phase,110V/160V/220V. 3-phase, 220V/380V/460V
Output frequency range0~maximum frequency 50/60HZ
Inverter efficiencyAbove 99.5%
Ambient temperature rangeG-type for submersible pumps, 150% rated current for 60s, 180% rated current for 2s  P type for general pumps, 120% rated current for 60s, 150% rated current for 2s
Solar pump control special performanceMPPT ( maximum power point tracking), CVT (constant voltage tracking), auto/manual operation, dry run protection, low stop frequency protection, minimum power input, motor maximum current protection, flow calculating, energy generated calculating and water tank level detected
Protection functionPhase loss protection, phase short circuit protection, ground to phase circuit protection, input and output short circuit protection. Stall protection
Protection degreeIP20, Air force cooling
Running modeMPPT or CVT
AltitudeBelow 1000m; above 1000m, derated 1% for every additional 100m.
Power factorAbove 95%
StandardAC input backup circuitCE, Design based on vector control drive S300 and S3200 series, more specification please refer to S300 or S320 vector control drive operation manual
Technical specification when it used for speed and torque controlling of motor as FA00 set to 0.
Voltage, frequencySingle phase 220V, 3 phase, 220V,380V, 660V and 1140V. Power 0.75kw to 37kw.
Control mode0: VF control ; 1: Vectorized VF control ; 2:Open loop vector control 1 ; 3: High performance open loop vector control 2
Maximum frequency0-650Hz
Multi-functionsPID Control, Carrier Frequency Adjustable, Current Limiter, Speed Search, Momentary Power Loss Restart,16 Step Speed (Max), 3-Wire connection, Slip Compensation, Frequency Jump, DC braking, Upper/Lower Frequency, Torque control, Compatible for PMSM and IM, built in RS485, counting, fault information checking, fully fault protection function, frequency combination reference.



SNModelsRate current(A)Output voltage ( VAC)Applicable for pumpsExternal of drive size(mm)MPPT voltage (VDC)Weight
1S series : VDC80-400VDC input,1/3 phase 0-110VAC output
1SG300-0K75GB-1S-M7A0-110VAC0.75KW143*86*1141541
2SG320-1K5GB-1S-M8.5A0-110VAC1.5KW185*125*1591542.5
3SG320-2K2GB-1S10A0-220VAC2.2KW185*125*1593102.5
4SG320-4K0GB-1S16A0-220VAC4.0KW245*150*1773103.5
2S series: Vmp 310VDC or 220VAC input, 1/3 phase 0-220VAC output
1SG100-0K75GB-2S4A0-220VAC0.75KW170*110*703101
2SG300-0K75GB-2S-M4A0-220VAC0.75KW143*86*1143101
3SG300-1K5GB-2S-M7A0-220VAC1.5KW143*86*1143101
4SG320-2K2GB-2S10A0-220VAC2.2KW185*125*1593102.5
5SG320-4K0GB-2S16A0-220VAC4.0KW245*150*1773103.5
4T series: Vmp540 to 650VDC or 380 to 460VAC input, 3 phase 0-380/460VAC output
11SG320-0K7GB-4T2.5A0-380/460VAC0.75KW185*125*159540/6502
12SG320-1K5GB-4T3.7A0-380/460VAC1.5KW185*125*159540/6502
13SG320-2K2GB-4T5A0-380/460VAC2.2KW185*125*159540/6502
14SG320-4K0GB-4T10A0-380/460VAC4.0KW185*125*159540/6502.5
15SG320--5K5GB-4T13A0-380/460VAC5.5KW245*150*177540/6503.5
16SG320-7K5GB-4T17A0-380/460VAC7.5KW245*150*177540/6504
17SG320-011GB-4T25A0-380/460VAC11KW247*160*178540/6505
18SG320-015GB-4T32A0-380/460VAC15KW247*160*178540/6505
19SG320-018GB-4T37A0-380/460VAC18KW335*217*190540/65010
20SG320-022GB-4T45A0-380/460VAC22KW335*217*190540/65019
21SG320-030GB-4T60A0-380/460VAC30KW463*285*225540/65019
22SG320-037GB-4T75A0-380/460VAC37KW463*285*225540/65029



1. Wiring and start up 

SG320 solar pump inverter


2. Inverter standard wiring 

SG320 solar pump inverter

SG320 solar pump inverter drives well all kinds of AC pump including PMSM.

Below table to introduce how to selection solar panels

265w, 38Voc (Open circuit voltage), 31Vmp ( Voltage at Pmax)
Inverter modelsPower of pumpConnection in series (PCS) (Vmp)Connect in parallel ( Strings) PowerTotal (PCS)
1S (110VAC)0.75kw to 1.0kw4 or 5 PCS1* strings5*1=5
2S (220VAC)0.75kw to 1.5kw10PCS1* strings10*1=10
2S (220VAC), Max 450vdc2.2kw11PCS1* strings11*1=11
4T(380VAC)0.75kw to 2.2kw18PCS1* strings18*1=18
4T(380VAC)Max 900VDC3.7kw20PCS1* strings20*1=20
4T(380VAC)5.5kw18PCS2* strings18*2=36
4T(380VAC)Max 900VDC7.5kw20pcs2* strings20*2=40
4T(380VAC)11kw18pcs3* strings18*3=54
4T(380VAC)Max900VDC15kw20pcs4* strings20*4=80



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