Rointe Onyx 700W Wi-Fi High Heat Retention Storage Heater | SHOXI156

Smart 700W HHR Storage Heater with 1560W Input, Wi-Fi Direct & Rointe NEXA App Control

The Rointe Onyx 700W Wi-Fi High Heat Retention Storage Heater | SHOXI156 is a smart electric storage heater designed to combine high heat retention, intelligent charging and advanced connected control for efficient modern heating.

The SHOXI156 delivers a 700W heat output from a 1560W charging input and uses six high-heat-retention energy cells to store heat for controlled release throughout the day. Rointe's Onyx range is designed to meet SAP High Heat Retention storage-heater criteria, making it suitable for energy-conscious domestic heating installations.

Built-in Wi-Fi Direct allows connection straight to the home router without requiring an additional gateway, while control through the Rointe NEXA app provides remote programming, monitoring and smart heating management.

Features

• 700W High Heat Retention Storage Heater
• 1560W Charging Input
• 6 High Heat Retention Energy Cells
• Smart Dynamic Charge Control
• Magnetite High Heat Retention Core
• Mg-Fe Alloy Thermal Storage Technology
• SAP High Heat Retention Storage Heater
• Built-In Wi-Fi Direct
• No Additional Gateway Required
• Bluetooth Low Energy Pairing
• Rointe NEXA App Control
• AI Heating System
• Inverter Smart Adaptive Technology
• Integrated Energy Consumption Meter
• Amazon Alexa & Google Assistant Compatible
• 24/7 Smart Programming
• 4 Editable Preset Programmes
• Open Window Detection
• Adaptive / Early Start
• Limited Mode
• Night Mode
• Holiday / Vacation Mode
• Boost Mode
• Frost Protection
• Panel & Remote Lock
• 1.77" Full-Colour Touch Display
• IPX4 Rated
• White RAL 9016 Finish
• Electronic & Electromechanical Overheat Protection
• 1.4m Cable Length

The 700W rating, 1560W input and six-element configuration are independently listed for model SHOXI156, while Rointe's Onyx range confirms the 700W output for this model.

High Heat Retention Storage Technology

The Rointe Onyx SHOXI156 uses a dense high-heat-retention mineral storage core to accumulate heat during charging periods and release it progressively when required.

The heater incorporates special magnetite-based Mg-Fe thermal cells, designed to provide high thermal inertia and effective heat storage. Intelligent charge calculation determines how much energy needs to be stored rather than simply charging the unit to maximum capacity every time.

This gives the Onyx greater control over stored heat and helps reduce unnecessary energy consumption compared with less sophisticated fixed-charge storage heating.

1560W Input with 700W Heat Output

The SHOXI156 has a 1560W charging input and 700W rated heat output. It sits above the SHOXI102 500W model in the Onyx range and below the SHOXI222 1000W model.

The higher storage capacity makes the SHOXI156 suitable for rooms requiring more heat than the smaller four-cell SHOXI102, subject to a proper room heat-loss calculation.

Smart Dynamic Charge Control

Rather than storing a fixed quantity of heat each night, the Onyx uses intelligent dynamic charging.

The system calculates the energy needed to meet the programmed heating requirement, helping avoid storing more energy than necessary. Rointe describes this as intelligent charge calculation that stores only the energy required to deliver heat when it is needed.

This makes the heater particularly suitable for modern off-peak electric heating strategies where both comfort and consumption need to be managed closely.

Wi-Fi Direct – No Gateway Required

One of the major practical advantages of the SHOXI156 is its integrated Wi-Fi Direct module.

The heater connects directly to a compatible router without requiring a separate hub or gateway, reducing hardware requirements when building a connected heating system.

Bluetooth connectivity is also provided for simplified pairing.

Rointe NEXA App Control

Once connected, the heater can be controlled remotely through the Rointe NEXA app.

The app provides access to heating schedules, temperature management, operating modes and energy-use information, allowing users to manage heating from a compatible smartphone even when away from the property.

The system is also designed to integrate with other compatible connected products within the Rointe heating ecosystem.

AI Heating System

Rointe's connected Onyx platform incorporates an AI-based heating system designed to learn from usage patterns and heating behaviour.

Inverter Smart Adaptive Technology

The Inverter Smart Adaptive system is designed to modulate heating rather than relying solely on full-power operation.

By adapting heat delivery as room conditions change, the system aims to provide more stable comfort and improved energy management.

Combined with the storage core and intelligent fan-assisted heat delivery, this gives the Onyx a more responsive operating profile than a traditional uncontrolled storage heater.

Integrated Consumption Monitoring

An integrated energy meter tracks heater consumption and makes energy-use information available through the connected control system.

This gives users clearer visibility over how much energy the heater is using and can help identify opportunities to optimise schedules, temperatures and operating modes. SHOXI156 product information also confirms an integrated consumption meter.

Alexa & Google Assistant Voice Control

The SHOXI156 can be integrated with Amazon Alexa and Google Assistant through Rointe's connected heating platform.

This allows compatible voice commands to complement control from the heater itself and through the Rointe NEXA app.

24/7 Smart Programming

The Onyx supports 24-hour, seven-day programmable heating, allowing operation to be adapted to household routines.

The SHOXI156 supports:

• 7-Day Programming
• 4 Editable Preset Programmes
• Home All Day / Out All Day Modes
• Boost Mode
• Away Mode
• Setback
• Frost Protection
• Countdown Operation

Open Window Detection

The Open Window function is designed to identify a sudden temperature drop and temporarily adjust heating behaviour to prevent wasting energy.

This is particularly useful if a window or external door is left open while the heater is operating. Open-window detection is a confirmed feature of the SHOXI156.

Adaptive / Early Start

Adaptive Start calculates when heating should begin to achieve the programmed room temperature at the required time.

Rather than requiring the user to guess a lengthy pre-heat period, the heater can intelligently bring heating forward based on the programmed schedule and room behaviour.

Limited Mode & Control Lock

Limited Mode restricts access to temperature settings and product controls.

This can be particularly useful in:

• Rental Properties
• Holiday Lets
• Hotels
• Student Accommodation
• Homes with Children

The heater also supports local and remote locking, helping prevent unauthorised changes to programmed settings.

Night & Holiday Modes

Night Mode allows the heater to operate more discreetly overnight while reducing unnecessary temperature and display activity.

Holiday / Vacation operation allows heating requirements to be reduced during periods when the property is unoccupied, before restoring the normal programme when the scheduled absence ends.

1.77" Colour Touch Display

The Onyx features a 1.77-inch full-colour touchscreen display, providing access to temperature, programming and operating information directly from the heater.

The user interface complements app control, meaning the heater remains fully functional even when a phone is not immediately available. A 1.77-inch TFT touchscreen is specifically listed for the SHOXI156.

Integrated Fan-Assisted Heat Delivery

Unlike a purely passive storage heater, the Onyx uses controlled fan-assisted heat distribution to release stored energy when required.

This helps provide more responsive room heating and greater control over when stored heat is released rather than allowing all stored energy to dissipate uncontrollably.

Safety & Protection

The SHOXI156 includes both electronic and electromechanical overheat protection, providing redundant safeguards against excessive operating temperature.

The product is also listed with UKCA, CE and BEAB compliance, together with Lot20 compatibility.

• Brand: Rointe
• Range: Onyx
• Model / Product Code: SHOXI156
• Product Type: Wi-Fi High Heat Retention Storage Heater
• Heat Output: 700W
• Charging Input: 1560W
• Energy Cell Packs: 6
• Storage Core: High Heat Retention Magnetite Energy Cells
• Thermal Cell Technology: Mg-Fe Alloy
• HHR / SAP High Heat Retention: Yes
• Voltage: 220–240V AC
• Frequency: 50Hz
• Wi-Fi: Wi-Fi Direct
• Gateway Required: No
• Bluetooth: Yes, Low Energy Pairing
• App Control: Rointe NEXA
• Voice Control: Amazon Alexa & Google Assistant
• AI Heating: Yes
• Inverter Smart Adaptive Technology: Yes
• Automatic Charge Control: Yes
• Energy Consumption Monitoring: Yes
• Programming: 24/7
• Editable Preset Programmes: 4
• Open Window Detection: Yes
• Adaptive / Early Start: Yes
• Limited Mode: Yes
• Boost Mode: Yes
• Holiday / Vacation Mode: Yes
• Panel Lock: Yes
• Frost Protection: Yes
• Display: 1.77" Full-Colour Touch Display
• Colour: White
• Finish: RAL 9016 Traffic White
• Cable Length: 1.4m
• IP Rating: IPX4
• Overheat Protection: Electronic & Electromechanical
• Approvals / Compliance: UKCA, CE, BEAB & Lot20
• Electronics Warranty: 3 Years
• Body Warranty: Up to 10 Years

Suitable Applications

• Domestic High Heat Retention Heating
• Bedrooms
• Living Areas
• Home Offices
• Apartments & Flats
• Electric-Only Properties
• New-Build Developments
• Storage Heater Replacement Projects
• Energy-Efficient Heating Upgrades
• Smart Home Heating
• Rental Properties
• Holiday Accommodation
• Hotels & Guest Accommodation
• Properties Using Suitable Off-Peak Tariffs
• Rointe Connected Heating Systems

Correct sizing should always be based on the calculated heat loss of the room rather than wattage or floor area alone.

Why Choose the Rointe Onyx SHOXI156?

The Rointe Onyx SHOXI156 combines the energy-storage benefits of a modern HHR heater with considerably more control than a conventional storage appliance.

Its 1560W charging input, 700W heat output and six-cell high-retention core provide greater heating capacity than the smaller SHOXI102, while intelligent charge management helps ensure only the required amount of energy is stored.

Wi-Fi Direct removes the expense and complexity of a separate connectivity gateway, while Rointe NEXA control, AI heating, consumption monitoring, 24/7 programming and Alexa/Google Assistant support provide a comprehensive smart-heating package.

For installations requiring a 700W SAP High Heat Retention storage heater with smart dynamic charging and remote control, the SHOXI156 is a strong mid-range option within the Rointe Onyx family.

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.