---
title: "Deye / Sunsynk / Sol-Ark"
description: "## Introduction Deye, Sunsynk and Sol-Ark inverters can be connected to the Qilowatt system using a Modbus module. This guide explains the necessary settings, wiring connections, and how to start the module. ## Prerequisites • A technician has verified that…"
url: "https://docs.qilowatt.eu/en/docs/deye-sunsynk-sol-ark/"
updated: "2025-10-30"
category: "3. Inverter Installation - pick the right one"
tags:
  - deye
  - installation
  - inverter
  - modbus R2
  - "sol-ark"
  - sunsynk
---

# Deye / Sunsynk / Sol-Ark

## Introduction

 Deye, Sunsynk and Sol-Ark inverters can be connected to the Qilowatt system using a Modbus module. This guide explains the necessary settings, wiring connections, and how to start the module.

## Prerequisites

 • A technician has verified that the inverter is operating correctly
• The inverter is able to charge batteries from the grid and, if permitted, sell energy back to the grid
• Battery maximum power limits are taken into account
• A Modbus R1 or R2 module is available
• Required tools and a communication cable (CAT5 or CAT6)

## Step-by-step Guide

### Inverter settings

 **1.**Open Deye inverter menu.
**2.** Configure the following settings:
• **Modbus SN (address):** 01
• **Master/Slave:** Slave
**• Modbus baudrate:** 9600
**• Time of Use:** activated

### Installing the module

 **1.** Install the **MODBUS module** according to the installation manual.
**2.** Connect the communication cable (CAT5 or CAT6) from the module’s RS485 A and B terminals to the corresponding inverter port.

⚠️ **Important!**
**•**If the inverter mainboard has a **DRM port**:
Connect the MODBUS R2 module terminals A and B to the inverter **BMS port** pins:
**•**Pin 1 → B+
**•**Pin 2 → A-
If the BMS port is already in use by the battery, use the**Y-splitter**included in the installation kit.

**•**If the inverter **does not have a DRM** port:
Connect the MODBUS R2 module terminals A and B to the inverter **Modbus port** pins:
**•**Pin 7 → A-
**•**Pin 8 → B+ ![](https://docs.qilowatt.eu/wp-content/uploads/2025/08/528224762_1124649282925785_6576931699721567072_n.webp)

### Starting the module

 **1.**Switch on the circuit breaker of the MODBUS R1 / R2 module (or insert the fuse).
**2.** Check if the module’s **white LED indicator** starts flashing rapidly.
**3.** Connect the module to your home WiFi network → [Connecting the device to WiFi.](https://docs.qilowatt.eu/en/docs/connecting-the-device-to-wifi/)
**4.** Place the module in a location with a strong WiFi signal.
**5.**If needed, use a WiFi range extender.

## Result

 The inverter is successfully connected to the Qilowatt system. The Modbus module transmits data and enables device control and optimization.

## If it Doesn't Work

 • If the LED indicator does not light up, check the connections and circuit protection.
• If communication does not work, verify that the Modbus address and baudrate are set correctly.
• If the module does not connect to WiFi, follow the guide → [Resetting WiFi settings](https://docs.qilowatt.eu/en/docs/resetting-wifi-settings/)
• If the issue persists, contact our team: [support@qilowatt.eu](mailto:support@qilowatt.eu).