What Mixergy does

Mixergy Limited is a UK-based, privately held company founded in 2014 that designs and manufactures intelligent hot water storage systems for residential, social housing, and commercial building markets. Its core products — Mixergy X, Solar X, iHP X, and Cube X — are smart cylinders built on patented top-down heating technology that heats only the water needed from the top down, delivering up to 40% energy savings and 10x faster hot water delivery than conventional cylinders. The portfolio extends from a flexible multi-source cylinder through a PV-ready unit with built-in solar diverter, an integrated R290 heat pump cylinder, and a compact G3-exempt thermal store for retrofit projects. Underlying the hardware is the Mixergy IO cloud platform and a consumer mobile app that enable remote monitoring, machine learning-driven schedule optimisation, anomaly detection, and predictive maintenance.

Name

Mixergy

Legal name

Mixergy Limited

Website

https://mixergy.co.uk

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Smart Hot Water Storage

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Home Energy & EV Charging (HEMS, Smart Meters, Batteries, Chargers) (HSAPAQAF)

akta.pro secondary industry

Heat Pump & Smart HVAC Controller Integration (HSAOANAD)

Keywords

• Smart hot water cylinders
• Intelligent hot water storage
• Heat pump cylinders
• Social housing hot water
• Grid flexibility services

Headquarters

HQ city

Cassington

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Smart Hot Water Cylinder Hardware: Sale of intelligent hot water cylinders (Mixergy X, Solar X, iHP X, Cube X) to housing developers, social housing providers, commercial building operators, and homeowners. Revenue from product sales with varying configurations based on heat source requirements.
2. Care Plan Subscriptions: Monthly and annual subscription plans (Mixergy Care and Mixergy Care Plus) providing remote diagnostics monitoring, software updates, and extended warranty coverage. Enables ongoing customer engagement and recurring revenue.
3. Extended Warranty: Extended warranty offerings ranging from 5 to 25 years depending on product line (Mixergy X, Solar X, iHP X up to 25 years; Cube X up to 5 years) upon registration within 60 days of commissioning.
4. Grid Flexibility Services: Demand-side response services through Grid Assistance feature, enabling tanks to participate in National Grid balancing. Revenue share with energy aggregators like Centrica Business Solutions.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

Mixergy designs, manufactures, and sells intelligent, IoT-connected hot water storage cylinders (Mixergy X, Solar X, iHP X, and Cube X) built on a patented top-down heating architecture that heats only the water a household needs, delivering up to 40% energy savings over conventional cylinders. The cylinders are paired with the Mixergy IO cloud platform, a mobile app for remote control, and a Care Plan subscription service offering predictive maintenance diagnostics and extended warranty coverage. Target buyers are housing developers, social housing providers, commercial building operators, and individual homeowners seeking SAP 10.2, Future Homes Standard, and Awaab's Law compliance.

Product overview

Mixergy offers a portfolio of intelligent hot water storage products centred on smart cylinders that use patented top-down heating technology to heat only the water needed, delivering up to 40% energy savings. The core product line includes Mixergy X (flexible smart cylinder compatible with multiple heat sources), Solar X (with built-in solar diverter for PV integration), iHP X (integrated heat pump cylinder), and Cube X (compact G3-exempt thermal store for retrofits). These are supported by the Mixergy IO cloud platform and mobile app providing remote monitoring, machine-learning optimisation, and predictive maintenance. The ecosystem is extensible via accessories including the Heat Pump Integration Pack (compatible with major heat pump brands) and PV Switch (for third-party solar diverters). A next-generation Smart Home Energy Management (SHEM) system extends intelligent control to heating, ventilation, and hot water in connected homes.

Differentiator

Problem solved

Functional benefit

Brands

• Mixergy X: Award-winning smart hot water tank that works with gas or oil boilers, electricity, solar PV, and heat pumps. Flexible, efficient solution for most homes.
• Solar X
• iHP X
• Cube X

Products and services

• Mixergy X Smart Hot Water Cylinder Award-winning smart hot water cylinder compatible with gas/oil boilers, electricity, solar PV (via third-party diverter or Solar X), and heat pumps. Uses patented top-down heating to deliver up to 40% energy savings and 10x faster hot water than conventional cylinders. Targeted at housing developers, social housing providers, and homeowners needing SAP 10.2 and Future Homes Standard compliance.
• Solar X Smart Hot Water Cylinder PV-ready smart hot water cylinder with a built-in solar diverter and PV-first control strategy. Automatically prioritises self-consumption of solar energy, reducing grid reliance by up to 35% and cutting installation costs by removing the need for third-party diverters. SAP 10.2 and Future Homes Standard compliant. Targeted at new build developers and solar-equipped homes.
• iHP X Integrated Heat Pump Cylinder All-in-one integrated heat pump cylinder with a built-in R290 air-source heat pump. Delivers high-efficiency, low-carbon hot water without an external heat pump unit. 3x more efficient than standard electric cylinders and heats usable hot water in under 30 minutes. SAP 85 B rated, Future Homes Standard aligned. Targeted at all-electric new build homes and gas-free retrofits.
• Cube X Compact Thermal Store Compact smart thermal store designed for retrofit projects in tight spaces. G3-exempt by design, eliminating the need for discharge pipework, annual safety certification, and legionella testing. Provides machine-learning-optimised hot water with up to 5-year extended warranty. Targeted at social housing retrofits and space-constrained installations.
• SHEM Smart Home Energy Management System Next-generation home energy management system combining intelligent control of heating, ventilation, and hot water. Tech-agnostic platform integrating with any energy source or appliance to reduce energy use and improve indoor air quality. Targeted at social housing providers and supported housing operators.
• Grid Assistance (Demand-Side Response Service) Demand-side response service enabling Mixergy tanks to participate in National Grid balancing schemes via the Grid Assistance feature. Device-level data is shared with energy aggregators such as Centrica Business Solutions for grid flexibility revenue. Targeted at housing providers and energy aggregators.
• Mixergy Care Plan Subscription Subscription-based maintenance and warranty programme (Mixergy Care and Mixergy Care Plus) providing remote tank diagnostics, automated monitoring, predictive maintenance insights, software updates, and priority support. Available on monthly and annual billing. Targeted at homeowners and housing providers seeking ongoing tank health assurance.
• Extended Warranty Programme Extended warranty coverage ranging from 5 years (Cube X) up to 25 years (Mixergy X, Solar X, iHP X stainless steel inner vessel) upon registration within 60 days of commissioning. Available as a multi-year contract on top of the standard 2-year warranty. Targeted at cylinder purchasers across all customer segments.

Quantifiable outcome

• Up to 40% less energy consumption than conventional cylinders
• +7 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration14 records

AI capability4 records

Feature7 records

Partnerships

Eight partnerships are on record, tiered flagship, core and minor.

• Historic Royal PalacesflagshipStrategic or Co-development Partner · 11 March 2026Smart hot water pilot at Hampton Court Palace targeting 40% energy reduction. Featured in Barclays Climate Ventures 'In the Field' film showcasing sustainable technology in heritage buildings.
• St BasilsflagshipStrategic or Co-development Partner · 1 February 2025Partnership with St Basils housing charity supporting young people at risk of homelessness. Live deployment of Smart Home Energy Management (SHEM) system since February 2025, demonstrating energy savings of up to 30% and improved indoor air quality while helping residents reduce energy bills.
• Legionella and Fire Safe ServicescoreImplementation/ SI/ Consulting PartnerInstallation partner for Birmingham City Council's Cube X pilot. Provided installation services for the first UK Cube X installation, validating product ease of installation and G3-exempt design benefits.
• Birmingham City CouncilflagshipStrategic or Co-development PartnerFirst local authority in UK to install Cube X smart hot water cylinders in social housing. Commercial trial expected to save residents thousands on hot water bills while simplifying compliance requirements.
• Cala Homes (East)coreStrategic or Co-development PartnerUsed Solar X to achieve strong SAP performance and carbon reduction at Cammo Meadows development. Partnership demonstrates product capability with solar PV and gas boiler integration for transition to gas-free domestic environments.
• KeepmoatcoreStrategic or Co-development PartnerHousing developer partner for Gedling Green pilot site, UK's first Future Homes Standard pilot with 33 homes achieving 91% carbon reduction using heat pumps, solar panels, and Mixergy smart technology.
• Centrica Business SolutionscoreTechnology or IntegrationGrid Assistance partnership enabling demand-side response participation. Mixergy shares device-level data with Centrica Business Solutions for National Grid balancing. Core infrastructure for grid flexibility services.
• World Sustainable Hospitality AllianceminorGTM or Marketing PartnerCo-presented at Sustainable Markets Initiative CEO Summit alongside industry leaders including Envision Energy, JA Solar, and Chinese Photovoltaic Industry Association for renewable energy collaboration.

Scale indicators10 records

Recent moves8 records

Expansion highlights1 record

Broad incumbents

• Vaillant: Major European heating manufacturer offering boilers, heat pumps and unvented hot water cylinders (e.g., uniSTOR, aroSTOR). Overlaps with Mixergy's cylinder and heat-pump integration offering but as part of a much broader HVAC portfolio.
• Daikin: Global HVAC manufacturer with Altherma heat pumps and integrated hot water tanks. Competes with Mixergy's iHP X integrated heat pump cylinder and is one of Mixergy's tested Heat Pump Integration Pack partners.
• Stiebel Eltron: German manufacturer of heat pumps, hot water cylinders and electric heating. Comparable to Mixergy in heat-pump-integrated domestic hot water and a Heat Pump Integration Pack partner of Mixergy.
• Worcester Bosch: UK leader in boilers and heating systems with Greenstore hot water cylinders and heat-pump-compatible stores. Competes with Mixergy in new-build specification and social-housing retrofit, but via a much wider product range and installer base.
• Baxi: UK heating brand (part of BDR Thermea) offering boilers, heat pumps and hot water stores. Competes with Mixergy in new-build and retrofit specifications through a very large installer network.

Direct peers

• Sunamp: UK-based manufacturer of compact thermal batteries and hot water heat stores with phase-change material. Comparable to Mixergy in targeting residential hot water storage, energy savings, and integration with heat pumps and renewables.
• Heatrae Sadia: Established UK manufacturer of hot water cylinders, water heaters and heat-pump cylinders. Directly comparable product category to Mixergy X, Solar X and iHP X in the UK trade and social-housing markets.
• Gledhill: UK specialist manufacturer of unvented hot water cylinders and thermal stores (e.g., Envirofoam, StainlessLite). Closest direct UK peer to Mixergy's cylinder business in new-build and social-housing retrofit channels.
• Telford Stainless Steel: UK manufacturer of stainless steel unvented hot water cylinders and thermal stores. Directly comparable to Mixergy's stainless steel cylinder range in specification-led new-build and social-housing projects.

Others

• Octopus Energy: UK energy retailer behind the Agile smart tariff that Mixergy's app integrates with. Not a product competitor but an ecosystem partner whose tariffs materially drive Mixergy's user-level savings proposition and grid-flexibility angle.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/MixergyLtd

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds5 records

Investors11 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mixergy