Rointe Onyx 1250W Wi-Fi High Heat Retention Storage Heater | SHOXI276

Smart 1.25kW HHR Storage Heater with 2760W Input, Wi-Fi Direct & Rointe NEXA App Control

The Rointe Onyx SHOXI276 is a powerful High Heat Retention storage heater combining intelligent thermal storage with Wi-Fi connectivity, automatic charge control and advanced energy-saving technology.

With a 1250W rated heat output and 2760W charging input, the SHOXI276 uses 10 high-heat-retention energy cell packs to provide a maximum thermal storage capacity of 19,320Wh (19.32kWh). Rointe's current technical literature confirms these ratings for the SHOXI276.

The Onyx incorporates Wi-Fi Direct, allowing connection to a compatible router without an additional gateway. Combined with the Rointe NEXA app, AI Heating, Inverter Smart Adaptive technology and intelligent charge calculation, it provides significantly greater control over stored electric heating than a conventional fixed-charge storage heater.

Features

• 1250W / 1.25kW Rated Heat Output
• 2760W Charging Input
• 19.32kWh Maximum Storage Capacity
• 10 High Heat Retention Energy Cell Packs
• 30 Individual Energy Cells
• High Heat Retention Mg-Fe Alloy Core
• Automatic Dynamic Charge Control
• SAP High Heat Retention Storage Heater
• Built-In Wi-Fi Direct
• No Separate Wi-Fi Gateway Required
• Compatible with 2.4GHz Wi-Fi Networks
• Bluetooth Pairing
• Rointe NEXA App Control
• AI Heating Technology
• Inverter Smart Adaptive Technology
• TRP Consumption Meter
• 24/7 Programmable Heating
• 4 Pre-Installed Programmes
• Open Window Detection
• Early Start
• Limited Mode
• Night Saving Mode
• Holiday Mode
• Boost Mode
• Countdown Timer
• Product & App Lock
• Voice Assistant Compatible
• Touch Control Panel with Display
• Ceramic Fan Rotor
• 100% Metal Body
• White RAL 9016 Finish
• IPX4 Rated
• Floor Supports Included
• 3-Year Electronics Guarantee
• 10-Year Body Guarantee

Rointe's current catalogue identifies these connected, energy-saving and control technologies across the Onyx HHR range.

High Heat Retention Storage Technology

At the heart of the SHOXI276 is a high-density Mg-Fe alloy thermal storage core, designed to accumulate electrical energy as heat and retain it until warmth is required.

The SHOXI276 requires 10 energy-cell packs, with each pack containing three energy cells, giving this model 30 individual cells in total. Its maximum storage capacity is 19,320Wh, providing substantially greater thermal storage than the smaller SHOXI102, SHOXI156 and SHOXI222 models.

Rointe positions the Onyx as a High Heat Retention solution designed around modern SAP and energy-efficiency requirements, with the manufacturer highlighting up to 16 hours of retained heat for the Onyx platform.

2760W Input with 1250W Heat Output

The SHOXI276 has a 2760W rated charging input and 1250W rated heat output, making it the second-largest output model in the current Onyx range.

The current range comprises SHOXI102 at 500W, SHOXI156 at 700W, SHOXI222 at 1000W, SHOXI276 at 1250W, and SHOXI330 at 1500W.

This increased capacity makes the SHOXI276 particularly suitable where a larger HHR storage heater is required, although final heater selection should always be based on a proper room heat-loss calculation.

Smart Automatic Charge Control

Traditional storage heaters can waste energy by storing more heat than will actually be needed. The Onyx addresses this with automatic intelligent charge control.

The heater calculates the energy required to satisfy programmed heating demand and adjusts its stored charge accordingly. This helps minimise unnecessary charging while ensuring sufficient heat is available when required.

Wi-Fi Direct – No Gateway Required

The SHOXI276 incorporates Wi-Fi Direct technology, allowing the storage heater to connect directly to a compatible router without requiring a separate gateway.

This reduces both installation complexity and the additional expense associated with proprietary smart-heating hubs. Rointe specifies compatibility with 2.4GHz Wi-Fi networks, while Bluetooth is incorporated for pairing.

Rointe NEXA App Control

Connected control is provided through the Rointe NEXA app, allowing users to manage compatible Onyx heating remotely from a smartphone.

The connected system provides access to programming, operating modes and consumption information, making it easier to manage heating around actual occupancy rather than relying solely on fixed schedules.

AI Heating System

Rointe incorporates Artificial Intelligence into the Onyx connected heating platform.

Inverter Smart Adaptive Technology

The Onyx also incorporates Rointe's Inverter Smart Adaptive Technology, which progressively adjusts power according to actual heating requirements.

Rointe states that this technology can reduce stabilisation power by up to 80% compared with traditional systems, helping maintain a more stable temperature while reducing unnecessary energy consumption during temperature maintenance.

TRP Energy Consumption Meter

An integrated TRP consumption meter provides information about the heater's energy use.

This gives users greater visibility over consumption and helps them understand how changes to temperature, programming and operating patterns affect energy use. Rointe notes that reported consumption figures can vary according to the circumstances of the electrical installation.

24/7 Smart Programming

The SHOXI276 provides comprehensive programmable control, allowing heating to be tailored around daily routines.

Functions include:

• 24/7 Programmable Operation
• 4 Pre-Installed Programmes
• Boost Mode
• Countdown Timer
• Holiday Mode
• Night Saving Mode
• Limited Mode
• Product & App Lock

These controls make it possible to reduce heating during periods of low demand while ensuring stored heat is available when the property is occupied.

Open Window Detection

The Open Windows function is designed to identify conditions associated with a sudden drop in ambient temperature and modify heating operation accordingly.

This helps avoid wasting stored energy when a window or external door is left open. Open Window detection is included within Rointe's current Onyx energy-saving feature set.

Early Start

Early Start intelligently anticipates scheduled heating periods so that the required comfort level can be reached at the programmed time.

Rather than requiring users to manually estimate how early heating needs to begin, the system adapts operation around the heating programme.

Limited Mode

Limited Mode restricts access to heater controls and available settings, helping prevent excessive or unauthorised temperature changes.

This can be particularly valuable for:

• Rental Properties
• Holiday Lets
• Hotels & Guest Accommodation
• Student Accommodation
• Managed Housing
• Homes with Children

Rointe specifically identifies this functionality as Limited mode for guests.

Night Saving & Holiday Modes

Night Saving Mode provides additional control over heating during overnight periods, while Holiday Mode allows operation to be adjusted during longer periods when the property is unoccupied.

Together with weekly scheduling and automatic charging, these modes allow the SHOXI276 to adapt more closely to real-world occupancy patterns.

Boost Mode

When additional heat is required, Boost Mode allows the heater to operate at maximum power for a temporary period.

This provides greater flexibility when room conditions or occupancy differ from the normal programmed schedule.

Voice Assistant Compatibility

The Rointe Onyx platform is compatible with voice assistants, providing another convenient control method alongside the heater's touch panel and the Rointe NEXA app.

Modern Touch Controls

The SHOXI276 incorporates a touch control panel with display, allowing heating settings and operating information to be accessed directly from the heater.

This means everyday operation does not depend on having a smartphone available, while the app provides additional remote control when required.

Fan-Assisted Heat Delivery

A ceramic fan rotor helps deliver stored heat into the room according to heating demand.

Fan-assisted delivery provides greater control over when accumulated thermal energy is released than a purely passive storage heater, helping retain heat until it is actually needed. Rointe specifies a ceramic fan rotor as part of the Onyx design.

Large 19.32kWh Thermal Storage Capacity

With a maximum storage capacity of 19,320Wh, the SHOXI276 provides considerably more stored thermal energy than the smaller models in the range.

For comparison, Rointe lists maximum storage capacities of 7,140Wh for SHOXI102, 10,920Wh for SHOXI156, 15,540Wh for SHOXI222 and 19,320Wh for SHOXI276.

• Brand: Rointe
• Range: Onyx
• Model / Product Code: SHOXI276
• Product Type: Wi-Fi High Heat Retention Storage Heater
• Rated Heat Output: 1250W / 1.25kW
• Rated Charging Input: 2760W
• Classification Rating: 920W
• Maximum Storage Capacity: 19,320Wh / 19.32kWh
• Required Energy Cell Packs: 10
• Energy Cells per Pack: 3
• Total Energy Cells: 30
• Storage Core: High Heat Retention Mg-Fe Alloy Cells
• Automatic Charge Control: Yes
• Wi-Fi: Integrated Wi-Fi Direct
• Wi-Fi Compatibility: 2.4GHz
• Separate Gateway Required: No
• Bluetooth Pairing: Yes
• App Control: Rointe NEXA
• AI Heating: Yes
• Inverter Smart Adaptive Technology: Yes
• Consumption Meter: TRP
• Voice Assistant Compatible: Yes
• Programming: 24/7
• Pre-Installed Programmes: 4
• Open Window Detection: Yes
• Early Start: Yes
• Limited Mode: Yes
• Night Saving Mode: Yes
• Holiday Mode: Yes
• Boost Mode: Yes
• Countdown Timer: Yes
• Product & App Lock: Yes
• Control: Touch Panel with Display
• Fan: Ceramic Fan Rotor
• Body: 100% Metal
• Colour: White
• Finish: RAL 9016
• Height: 740mm
• Width: 1069mm
• Depth: 190mm
• Empty Weight: 35.5kg
• Installed Weight with Cells: 142kg
• IP Rating: IPX4
• Floor Supports: Included
• Electronic Components Guarantee: 3 Years
• Product Body Guarantee: 10 Years

Suitable Applications

• Domestic High Heat Retention Heating
• Larger Living Areas
• Lounges
• Dining Rooms
• Bedrooms
• Open-Plan Areas Where Appropriately Sized
• Apartments & Flats
• Electric-Only Properties
• New-Build Developments
• Storage Heater Replacement Projects
• Energy-Efficient Heating Upgrades
• Smart Home Heating Systems
• Rental Properties
• Holiday Accommodation
• Hotels & Guest Accommodation
• Social & Managed Housing
• Properties Using Suitable Off-Peak Electricity Tariffs
• Connected Rointe Heating Installations

The correct heater size should always be determined using the calculated heat loss of the room rather than floor area alone.

Why Choose the Rointe Onyx SHOXI276?

The Rointe Onyx SHOXI276 is designed for installations requiring considerably greater thermal storage than the smaller models in the Onyx family.

Its 2760W charging input, 1250W heat output, 19.32kWh maximum storage capacity and 10 energy-cell packs give it substantial heat-storage capability, while automatic charge control helps prevent unnecessary energy from being stored.

Advanced features including Wi-Fi Direct, Rointe NEXA app control, AI Heating, Inverter Smart Adaptive Technology, TRP consumption monitoring, Open Window Detection, Early Start and 24/7 programming transform the SHOXI276 from a conventional storage heater into a fully connected heating appliance.

For properties requiring a 1.25kW High Heat Retention storage heater with intelligent charging and smart control, the SHOXI276 provides a powerful option near the top of the Rointe Onyx range.

What are Heavy Goods?

Carriage is shown at the checkout stage and is charged at the cost price of a pallet based on a 48-hour delivery service to most locations; more remote locations can be longer because of the logistics involved. All storage heaters, except mini-bathroom storage heaters, are over the standard carriage weight of 30 kg. Carriage is calculated based on your postcode and the number of pallets that will be necessary to dispatch your order (e.g. the cost of delivering 4 storage heaters could well be the same cost as delivering 1 storage heater if it is possible to get 4 heaters of the size ordered onto one pallet). We work on a maximum weight of 500 kg per pallet, which will be delivered by lorry. It is your responsibility to unload the pallet.