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Suntrio Plus 20K On-Grid Three-Phase Inverter


Quick Overview

Industrial and Commercial three phase PV grid-connected inverters are mainly used in commercial rooftop PV grid system, to turn PV DC current into AC current for equipment in factories or sell to power grid. Suntrio Plus 12-20K is characterized with high efficiency, convenience in installing, stable and reliable. It’s preferred inverter for commercial PV investment.


Product CodeST-20
Warranty5 Years
User GuideDownload PDF

2 in stock

SKU: ST-20K Categories: ,

The Suntrio Plus 20K On-Grid Three-Phase Solar Inverter comes with a warranty of up to 5 years. This solar inverter model is considered super-efficient as the DC to AC conversion ratio is merely up to the mark. The recommended accessed DC power is up to 24200 Watts. Likewise, the solar inverter MPPT module is able to handle a maximum DC voltage range of 180 – 900 V. The voltage required for the starting of the solar power inverter model is up to 200 V. On the other hand, the minimum DC voltage as the input is 180 V. There are two MPPT modules installed in the solar inverter for better conversion efficiency.

Working Efficiency

The maximum efficiency of DC to AC conversion is up to 98.5%—the MPPT module has an accuracy of >99%. The rated AC power generated out by the solar inverter model is up the 20000 VA. Here, are some of the important outputs working factors;

  • The maximum AC apparent power of the Suntrio Plus 20K On-Grid Solar Inverter is—22000 VA.
  • The rated AC current from the solar inverter is up to 29 amperes.
  • The maximum generated AC current from the model—33 amperes.
  • The grid frequency range moves from—50 Hz, 60 Hz/44Hz-55Hz, 54Hz-65Hz.
  • The power factor of the model is 0.8 leading – 0.8 lagging.
  • THDi (total harmonic distortion) is less than even 3%.

Related: Suntrio 10K On-Grid Solar Inverter

Protective Features

The protective features of the solar inverter allow the device to be safe from imminent damage—this can be because of many reasons. Some of the protective features are;

  • Internal Over-Voltage Protection
  • DC Insulation Monitoring
  • AC Short Circuit Current Protection
  • Thermal Protection
  • AC Surge Protection
  • DCI/GFCI/ Grid Monitoring

Frequently Asked Questions

Can I Leave my inverter on all the time?

This might be important when you are not leaving the place—keeping the solar inverter turned on all the time does not get to lose the AC power, thus, the appliance won’t lose any certain settings. In case, if the user is leaving the place, then he/she must turn off the solar inverter.

How fast does the inverter drain the battery?

The solar inverter without any load or appliances to operate—usually consume 0.1 – 0.2 amperes per hour. On the other hand, the larger models consume 2.0 ampere per hour.

What does a solar inverter do?

As the solar plates capture the sunlight and generated energy in the form of DC power—but the standard home appliances are required AC power to be operated properly. This is where solar inverters bump in. They take in the DC power generated by the PV plates and invert them to the AC form.

Can you charge a battery while using an inverter?

Using any of the best solar inverters to charge the solar batteries is considered safe for usage—as the simple solar chargers for the batteries are likewise a good option for them but solar inverters being connected for too much might cause any damage.

Technical Specification

Input (DC)
Recommended accessed DC power1 [W]24200
Max. DC Voltage [V]
MPPT Voltage Range [V]180-900
Nominal DC Voltage [V]
Start Voltage [V]200
Min. DC Voltage [V]180
Max. DC Input Current PV1/PV2 [A]22/22
Number of MPPT2
Number of DC Connections Sets per MPPT2/2
DC Switch
Output (AC)
Rated AC Power [VA] (@230V,50Hz)20000
Max. AC Apparent Power [VA]22000
Rated AC Current [A]29.0
Max. AC Current [A]33.0
Nominal AC Voltage / Range3/L/N/PE, 220/380V,  230/400V, 240/415V; 180V-280V/312V-485V
Grid Frequency / Range50Hz, 60Hz/44Hz-55Hz,  54Hz-65Hz
Power Factor, Adjustable [cos φ]0.8 leading ~ 0.8 lagging
Total Harmonic Distortion [THDi]<3% (at Nominal Power)
Feed-in3L + N + PE
Max. Efficiency98.5%
Euro Efficiency (at 600Vdc)98.2%
MPPT Accuracy>99.9%
Internal Over-Voltage ProtectionIntegrated
DC Insulation MonitoringIntegrated
DCI / GFCI / Grid MonitoringIntegrated
AC Short Circuit Current ProtectionIntegrated
Thermal ProtectionIntegrated
AC Surge ProtectionⅢ (Integrated),Ⅱ (Optional)
String Current MonitoringIntegrated
DC Surge ProtectionⅡ (Optional)
DC FuseOptional
Anti-island Protection MonitoringAFD
DC ConnectionMC4/H4
AC ConnectionTerminal Block
LCD Display3.5 inch Graphic LCD Display, Backlight
Display LanguageEnglish
Communication Port2*RS485 + 1*RS232
CommunicationWi-fi / GPRS / Ethernet  (Optional)
General Data
Consumption at Night [W]<0.6
Consumption at Standby [W]<10
Operating Temperature Range-25°C to +60°C (45°C to 60°C with Derating)
Cooling MethodIntelligent fan
Ambient Humidity0% – 100% Non-condencing
Altitude3000m ( >2000m power derating)
Ingress ProtectionIP65 (Indoor and Outdoor installation)
MountingRear Panel
Dimensions (H*W*D) [mm]640*450*232
Net Weight [kg]33.0
Standard Warranty  [year]5 (standard) 10/15/20/25 (Optional)
CertificatesIEC/EN62109-1/2,  EN61000-6-2/3, IEC61683, IEC60068-2, IEC62116, IEC61727,  VDE0126-1-1/A1, VDE-AR-N 4105, CQC NB/T 32004, G83/2, NBR 16149, NBR 16150,  C10/11, EN50438, Rd1669, UNE206006,  UNE206007, G59/3



Flexible and Efficient

  • Optimized global MPPT algorithm, MPPT efficiency higher than 99.5%
  • Three MPPT which are compatible to all kinds of solar roofs
  • Max. efficiency of 98.8%, European efficiency of 98.5%
  • Super wide input voltage range(180V-1000V), supporting various solar panels and string desings

Convenient Installation

  • Aluminium case design, smaller and lighter
  • Integrate DC combiner box, reduce system cost
  • Separate area for maintenance, easy and quick for repair

Smart and Easy to Use

  • One-button safety setting, easy configuration of all parameters
  • Built-in independent RTC chip, supporting data storage of 25 years
  • Integrated LCD graphical display, showing daily/monthly/yearly generation
  •  Integrated with the function of reactive power control & ZVRT, responds to power grid dispatching, energy management of grid
  • Integrate string current monitoring, monitor string working status

Safe and Reliable

  • IP65 protection for indoor and outdoor installation
  • Optional DC&AC surge protection, guarantee system safety
  • Optional Anti-PID module, protect panels from PID damage
  • Aluminum case design to enhance heat dissipation and prevent rust corrosion, prolong life time


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