# Deye SUN18 20 22 23 25KG05

Type: solar inverter
Manufacturer: Deye
URL: https://inverterdata.com/en/deye/deye-sun18-20-22-23-25kg05/
Manufacturer source: https://www.deyeinverter.com/product/three-phase-string-inverter/SUN18-20-22-23-25KG05.html
Database: InverterData (inverterdata.com)
License: free to quote with attribution to inverterdata.com

## Overview

Five capacity variants share this Deye designation — 18, 20, 22, 23 and 25 — and the datasheet figures recorded here belong to the 20 kW unit, rated at 20,000 W nominal and 22,000 W maximum AC output. All are three-phase string inverters aimed at commercial rooftops and small ground-mount arrays.

Conversion losses stay low: 98.5% peak efficiency and 98.0% European efficiency, with total harmonic distortion held to 3%. Two MPPT channels track from 200 V to 1,000 V and accept up to 26 A each, under a 1,100 V ceiling on DC input, so long strings and mismatched roof planes can be combined on a single unit.

Output is 220/380 V or 230/400 V at 50/60 Hz, and the non-isolated topology keeps the chassis down to 20 kg. An IP65 enclosure and a -25 °C to +60 °C operating window suit outdoor wall mounting in most climates.

## Specifications

| Specification | Value |
| --- | --- |
| Nominal AC Power | 20000 W |
| Maximum AC Power | 22000 W |
| Maximum Efficiency | 98.5 % |
| European Efficiency | 98.0 % |
| MPPT Voltage Range | 200-1000 V |
| Maximum DC Input Voltage | 1100 V |
| Number of MPPT Channels | 2 |
| Maximum DC Input Current per MPPT | 26 A |
| AC Output Voltage | 220/380V, 230/400V |
| AC Output Frequency | 50/60 Hz |
| Total Harmonic Distortion (THD) | 3 % |
| Weight | 20 kg |
| Enclosure Protection Rating | IP65 |
| Operating Temperature Range | -25 to +60 °C |
| Inverter Type | Non-Isolated |
| Number of Phases | 3 |

Not published by the manufacturer: Output Wave Type.

## Frequently asked questions

### How much power does the Deye SUN18-20-22-23-25KG05 deliver?

The Deye SUN18-20-22-23-25KG05 designation covers a family of three-phase inverters rated from 18 kW up to 25 kW, so the exact output depends on the variant ordered. The figures recorded for this entry are 20,000 W of nominal AC power with a 22,000 W maximum, which suits a commercial array of roughly that size.

### Is the Deye SUN18-20-22-23-25KG05 single-phase or three-phase?

The Deye SUN18-20-22-23-25KG05 is a three-phase inverter, listed for 220/380 V or 230/400 V grids at either 50 or 60 Hz, so it needs a three-phase connection rather than an ordinary domestic single-phase supply. Total harmonic distortion is quoted at 3 percent, which keeps the injected current within the limits utilities normally expect.

### What does the 200-1000 V MPPT range of the Deye SUN18-20-22-23-25KG05 mean for string design?

The Deye SUN18-20-22-23-25KG05 tracks between 200 V and 1000 V and withstands 1100 V of maximum DC input voltage. Every string must therefore stay above 200 V on a hot afternoon and below 1100 V at the coldest expected dawn. That wide window allows long strings, which cuts DC cabling and combiner work on large roofs.

### How many MPPT channels does the Deye SUN18-20-22-23-25KG05 have?

The Deye SUN18-20-22-23-25KG05 has two independent MPPT channels, each accepting up to 26 A of DC input current. Two trackers let two roof planes with different orientation or shading be optimised separately, and 26 A per channel leaves headroom to parallel more than one string of current-dense modern modules.

### How efficient is the Deye SUN18-20-22-23-25KG05?

The Deye SUN18-20-22-23-25KG05 is rated at 98.5 percent maximum efficiency and 98.0 percent European efficiency, the weighted figure that reflects a realistic mix of partial and full load. In practice around two percent of the DC energy the array produces is lost in conversion, which is at the strong end for a three-phase string inverter.

### Can the Deye SUN18-20-22-23-25KG05 be mounted outdoors?

The Deye SUN18-20-22-23-25KG05 carries an IP65 rating and an operating temperature range of -25 to +60 degrees Celsius, so it can be wall-mounted outdoors, ideally out of direct midday sun. At 20 kg it is a two-person lift onto its bracket, and its non-isolated topology means no internal transformer adds to that weight.

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