# Deye SUN18 20 25KG04 1825KW Three Phase 2 MPPT 237

Type: solar inverter
Manufacturer: Deye
URL: https://inverterdata.com/en/deye/deye-sun18-20-25kg04-1825kw-three-phase-2-mppt-237/
Manufacturer source: https://www.deyeinverter.com/product/three-phase-string-inverter/sun18-20-25kg04-1825kw-three-phase-2-mppt-237.html
Database: InverterData (inverterdata.com)
License: free to quote with attribution to inverterdata.com

## Overview

Professional solar installations demand reliable power conversion, and this 18.25kW three-phase inverter delivers exceptional performance for commercial and large residential applications. With its impressive 98.5% maximum efficiency and 98% European efficiency rating, it maximizes energy harvest while minimizing losses during conversion.

Engineered with dual MPPT channels supporting voltage ranges from 200-1000V, this inverter accommodates diverse panel configurations and optimizes power output across varying conditions. Each MPPT channel handles up to 26A of DC input current, while the robust IP65 protection rating ensures reliable operation in challenging outdoor environments. Operating efficiently across temperatures from -25°C to +60°C, its compact 20kg design facilitates installation without compromising durability or performance standards required for professional solar systems.

## Specifications

| Specification | Value |
| --- | --- |
| Maximum Efficiency | 98.5 % |
| European Efficiency | 98 % |
| 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: Nominal AC Power, Maximum AC Power, Output Wave Type.

## Frequently asked questions

### What range of inverters does the Deye SUN18/20/25K-G04 designation span?

The Deye SUN18/20/25K-G04 designation spans three-phase string inverters from 18 kW to 25 kW, so the capacity delivered follows the variant specified. This entry holds one shared set of figures for a non-isolated three-phase machine, and they should be read as common platform data rather than a single rating.

### What grid configuration does the Deye SUN18/20/25K-G04 require?

The Deye SUN18/20/25K-G04 is a three-phase inverter listed for 220/380 V or 230/400 V at 50 or 60 Hz. Each voltage pair describes one four-wire arrangement, phase to neutral and phase to phase, so a three-phase connection is essential. Its total harmonic distortion of 3 percent keeps the injected current clean.

### How long can the strings be on a Deye SUN18/20/25K-G04?

The Deye SUN18/20/25K-G04 tracks from 200 V to 1000 V and withstands 1100 V of maximum DC input voltage, a wide window that permits long strings. Fewer, longer strings mean less DC cabling and fewer combiner terminations on a large roof, provided the cold open-circuit voltage stays clear of 1100 V.

### What do the two MPPT trackers of the Deye SUN18/20/25K-G04 allow?

The Deye SUN18/20/25K-G04 carries two independent MPPT channels, each accepting a maximum DC input current of 26 A. Two trackers let two roof sections with different orientation or shading be optimised separately, and 26 A per channel is enough to parallel more than one string of high-current modern modules.

### Where does the Deye SUN18/20/25K-G04 sit on conversion efficiency?

The Deye SUN18/20/25K-G04 is rated at 98.5 percent maximum efficiency and 98 percent European efficiency, placing it at the strong end for a three-phase string inverter. Only about two percent of the DC energy the array generates is lost in conversion across a realistic mix of partial and full load.

### What are the installation limits of the Deye SUN18/20/25K-G04?

The Deye SUN18/20/25K-G04 has an IP65 rating and an operating temperature range of -25 to +60 degrees Celsius, so it can hang on an outdoor wall, ideally shaded from midday sun. Its 20 kg is best handled by two people onto the bracket; the non-isolated topology avoids the weight of an internal transformer.

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