---
product_id: 461581801
title: "15 Amp Relay R4, Wi-Fi Dual Voltage Control for SunTouch Electric Floor Systems Up to 150 Sq Ft at 120V/300 Sq Ft at 240V Built-In 915MHz Wireless Connection to SunStat ConnectPlus Thermostat"
brand: "suntouch"
price: "A$314"
currency: AUD
in_stock: true
reviews_count: 9
category: "Sun Touch"
url: https://www.desertcart.com.au/products/461581801-15-amp-relay-r4-wi-fi-dual-voltage-control-suntouch
store_origin: AU
region: Australia
---

# Dual-voltage 120V/240V power control Covers up to 300 sq ft at 240V, scalable to 3,000 sq ft Built-in 915MHz wireless & Wi-Fi connectivity 15 Amp Relay R4, Wi-Fi Dual Voltage Control for SunTouch Electric Floor Systems Up to 150 Sq Ft at 120V/300 Sq Ft at 240V Built-In 915MHz Wireless Connection to SunStat ConnectPlus Thermostat

**Brand:** suntouch
**Price:** A$314
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your floor heating game with smart, scalable power control! ⚡

## Quick Answers

- **What is this?** 15 Amp Relay R4, Wi-Fi Dual Voltage Control for SunTouch Electric Floor Systems Up to 150 Sq Ft at 120V/300 Sq Ft at 240V Built-In 915MHz Wireless Connection to SunStat ConnectPlus Thermostat by suntouch
- **How much does it cost?** A$314 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/461581801-15-amp-relay-r4-wi-fi-dual-voltage-control-suntouch)

## Best For

- suntouch enthusiasts

## Why This Product

- Trusted suntouch brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Wireless Freedom:** 915MHz built-in wireless tech with Wi-Fi and voice assistant compatibility for effortless remote control.
- • **Scale Your Comfort:** Manage up to 300 sq ft per relay, daisy-chain up to 10 for massive 3,000 sq ft coverage.
- • **Safety First, Always:** Integrated GFCI and status indicators ensure reliable, worry-free operation every time.
- • **Power Meets Precision:** Dual-voltage control for seamless 120V or 240V floor heating systems up to 15 amps.
- • **Smart Control, Anytime:** Sync with SunStat ConnectPlus thermostat and Watts Home app for intuitive scheduling and monitoring on the go.

## Overview

The SunTouch SunStat Relay R4 is a cutting-edge dual-voltage (120V/240V) relay designed to control electric floor heating systems requiring over 15 amps. Featuring built-in GFCI safety, 915MHz wireless communication, and Wi-Fi connectivity, it pairs seamlessly with SunStat thermostats and smart home assistants like Alexa and Google. Covering up to 300 sq ft per relay and scalable to 3,000 sq ft via daisy-chaining, it offers professional-grade, flexible heating control for residential and commercial spaces.

## Description

The SunTouch SunStat Relay R4 is an advanced 120V/240V dual-voltage device designed specifically to control the voltage for SunTouch electric floor heating systems that require more than 15 amps. It is equipped with built-in GFCI and status indicators, ensuring safe and reliable operation.Capable of direct wired connections to SunStat thermostats, including Connect Plus, Connect, and Command, this relay provides simple and efficient control of larger heating systems. Please note that it should not be used with older model thermostats or relays and each relay requires an additional 20-amp circuit and individual circuit breaker to function properly.Utilizing 915MHz wireless technology, the Relay R4 supports Wi-Fi connectivity and can connect wirelessly to the SunStat ConnectPlus Thermostat, enabling seamless interaction with mobile apps available for both Android and iOS devices. This connectivity extends to voice control functionality, as the system is compatible with Alexa and Hey Google. With the free Watts Home app, users can conveniently monitor and control their floor warming system from anywhere at any time, adding a layer of modern convenience.Additionally, the SunStat Relay R4 is highly capable, managing up to 150 square feet of heating at 120V or 300 square feet at 240V. For larger installations, the relay allows for the daisy-chaining of up to ten relays, enabling expansive control of up to 1,500 square feet at 120V or 3,000 square feet at 240V. This scalability makes the Relay R4 an ideal solution for both residential and commercial applications.

Review: Great electric screen thermostat - Easy install. We purchased when our last thermostat was broken off the wall. Had to hardwire with ease. and it works so well. the screen beats the old one with use being easier to do.
Review: Buy it - Works perfectly. Had an electrician install the unit. Replacement my 7 year old sun touch unit that shot craps. Floor instantly heated. Easy to program.

## Features

- VOLTAGE CONTROL: The SunTouch SunStat Relay R4 is a dual-voltage 120V/240V device designed to control the voltage to SunTouch electric floor heating systems that require more than 15 amps; it should not be used with older model thermostats or relays. Includes built-in GFCI and status indicators to ensure safe operation.
- ENHANCED COMPATIBILITY: This relay device wires directly to SunStat thermostats - Connect Plus, Connect, and Command - for simple control of larger systems. Each relay requires an additional 20-amp circuit and individual circuit breaker.
- WIRELESS COMMUNICATION: Utilizing advanced 915MHz wireless technology, the SunStat Relay R4 can also communicate wirelessly with the SunStat ConnectPlus Thermostat, which supports Wi-Fi connectivity with apps for Android and iOS mobile devices and works with Alexa and Hey Google for voice control of your floor warming system. The free Watts Home app enables convenient monitoring and control of your system from anywhere and any time.
- HIGH-CAPACITY COVERAGE: This relay device can control up to 150 sq. ft. at 120V or 300 sq. ft. at 240V. Additionally, it allows daisy-chaining of up to ten relays for expansive control of up to 1,500 sq. ft. at 120V or 3,000 sq. ft. at 240V, making it ideal for large-scale installations.
- FEEL THE SUN: SunTouch provides a wide range of electric floor heating and snow melting systems that are widely used in residential, commercial, and institutional projects to create comfortable, warm, safe, inviting spaces. With more than 30 years of experience in electric radiant heating, we are proud to deliver quality products, simple-design services, and world-class support.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09TRXV6L5 |
| Backlight | No |
| Best Sellers Rank | #10,476 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #692 in Heaters & Heater Accessories |
| Brand | SunTouch |
| Color | Black |
| Connectivity Protocol | Wi-Fi |
| Connectivity Technology | Wireless connection |
| Control Method | Touch |
| Controller Type | Hand Control |
| Date First Available | March 2, 2022 |
| Included Components | Relay thermostat |
| Item Weight | 9.9 ounces |
| Item model number | 500980 |
| Manufacturer | Watts |
| Material | Plastic |
| Model Name | SunStat |
| Mounting Type | Panel Mount or DIN Rail Mount |
| Product Dimensions | 5.75 x 2.75 x 3.75 inches |
| Shape | Rectangular |
| Special Feature | Auto-Scheduling |
| Specific Uses For Product | Electric Baseboard Heater |
| Specification Met | 4-ul Certified |
| Style | Relay SunTouch Controller |
| Temperature Control Type | Heating |
| UPC | 840213021542 |
| Voltage | 120 Volts |
| Wattage | 4800 watts |

## Product Details

- **Brand:** SunTouch
- **Color:** Black
- **Controller Type:** Hand Control
- **Model Name:** SunStat
- **Special Feature:** Auto-Scheduling

## Images

![15 Amp Relay R4, Wi-Fi Dual Voltage Control for SunTouch Electric Floor Systems Up to 150 Sq Ft at 120V/300 Sq Ft at 240V Built-In 915MHz Wireless Connection to SunStat ConnectPlus Thermostat - Image 1](https://m.media-amazon.com/images/I/51M7Ew+VddL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great electric screen thermostat
*by A***R on December 14, 2025*

Easy install. We purchased when our last thermostat was broken off the wall. Had to hardwire with ease. and it works so well. the screen beats the old one with use being easier to do.

### ⭐⭐⭐⭐⭐ Buy it
*by T***N on January 8, 2026*

Works perfectly. Had an electrician install the unit. Replacement my 7 year old sun touch unit that shot craps. Floor instantly heated. Easy to program.

### ⭐⭐⭐⭐⭐ Seamless Upgrade for Heated Floors
*by B***U on August 15, 2023*

recently replaced my old SunTouch control panel with the SunTouch Command Touchscreen Programmable Thermostat, and I was amazed at how quickly my heated floors were up and running again. Installing the new thermostat was a breeze. The instructions were clear, and within minutes, I had the new unit installed and ready to go. The compatibility between my old system and the new thermostat was impressive. The performance of the SunTouch Command Thermostat was outstanding. Once I turned it on, the heated floors responded immediately. The temperature control was precise, maintaining a consistent level of warmth throughout the day. The programmable settings allowed me to customize the heating schedule to my liking. The touchscreen interface was intuitive and easy to navigate. Even as someone who isn't very tech-savvy, I had no trouble adjusting settings or programming the thermostat. The display was well-organized, making it simple to understand. The design of the thermostat blended well with my home environment. The responsive touchscreen and adequately sized display were notable features, though slightly larger text would have been appreciated for better visibility from a distance. In conclusion, the SunTouch Command Touchscreen Programmable Thermostat breathed new life into my heated floors. Its straightforward installation, accurate performance, and user-friendly interface make it an excellent choice for upgrading your heating control system. If you're looking for an efficient and convenient way to manage the temperature of your heated floors, the SunTouch Command Thermostat is a solid recommendation.

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-13*