VST-15K-20K-PM3 Series 15-20kW Three Phase On-grid Inverter Overview 

The VEICHI VST-15K-20K-PM3 series three-phase grid-tie inverters, tailored for residential and small commercial applications, are available in three power ratings from 15kW to 20kW. Precise MPPT algorithms reduce energy loss, delivering up to 98.8% maximum efficiency. With 3 MPPT trackers, a maximum PV input current of 36A, and an MPPT voltage range of 100V–1080V, they are compatible with high-power PV modules for extended generation and greater returns. Multiple grid-tie certifications make them suitable for use in many countries worldwide. The IP66 protection rating, intelligent grounding detection, and lightning protection ensure safe operation.

High-Performance On-Grid Inverter

High-Performance On-Grid Inverter

  • Maximum MPPT current: 36A, peak efficiency up to 98.8%, delivering higher green energy yield;
  • Low startup voltage as low as 50V, extending daily power generation hours;
  • Adjustable AC output voltage range 312V–520V, compatible with most grid specifications;
  • Three MPPTs channels with precise MPPT algorithm for real-time maximum power point tracking;
  • Wide MPPT voltage range, offering strong anti-shading capability.
Multiple Features for Worry-Free Operation

Multiple Features for Worry-Free Operation

  • IP66 protection rating, suitable for both indoor and outdoor installation;
  • Lightweight and compact design for easy installation;
  • Ground fault detection and built-in lightning protection ensure safe operation;
  • Multiple grid‑tie certifications enable deployment in countries worldwide;
  • Low-noise design with noise level below 40 dB for unobtrusive operation.

Technical Specifications

Product Model
VST-15K-PM3 VST-18K-PM3 VST-20K-PM3
Max Input Voltage(V)
1100 1100 1100
Max Input Current(A)
36/36/36 36/36/36 36/36/36
MPPT Number
3 3 3
Strings Number Per MPPT
2/2/2 2/2/2 2/2/2
Rated Grid Voltage(V) (L/N/PE)
220/380, 230/400, 240/415, 312~520 220/380, 230/400, 240/415, 312~520 220/380, 230/400, 240/415, 312~520
Start-up/Min Input Voltage(V)
50/40 50/40 50/40
MPPT Voltage Range(V)
100~1080 100~1080 100~1080

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