Wondrwall: Intelligent Home Energy Management

Wondrwall is a UK maker of an intelligent home energy management system: a combination of hardware and software that controls heating, hot water, lighting, security and energy from a single app. The National Energy Action evaluation of two Wondrwall installations describes it as "an intelligent home energy management system which combines multiple technologies with the aim to provide a low carbon home which has low running costs"¹. The company's own figures claim a reduction of over £1,300 a year in the energy bill of an average UK new build home².

The system is sold as an Energy Service Contract rather than as a box of parts. Wondrwall states that the service charge covers all energy management related costs, maintenance and support for the duration of the contract, and that hardware is fully maintained throughout it². That structure matters for how a household should read the offer: the household is buying an ongoing service, not just a control panel.

The measured evidence base is narrower than the marketing. An independent trial published by NEA in July 2025 found net energy consumption for the year was 50% lower for the Wondrwall house than for a control property¹. Wondrwall's own headline claims run higher, including heating bill savings of over 80%². Both figures exist, and they are not the same measurement.

What the system controls, and from where

Wondrwall's app is the single interface for the home. The company states that users can "manage lighting, security, heating, hot water, energy, and entertainment from one app"². That is a wider remit than a smart thermostat or a home energy monitor, and it is the point of the product: rather than several apps for heating, lighting and audio, the system treats the house as one controllable asset.

The hardware that does the work is not a single unit. In the two properties evaluated by NEA, the Wondrwall system comprised a 5.81kW solar PV system with a 6kWh battery, a smart hot water cylinder and infrared heating panels, smart light switches and a tablet computer for control¹. That is the shape of a full installation: generation, storage, heat, lighting and a fixed control surface on the wall.

The control surface is also the fallback. Wondrwall states that if wifi goes down, lights can still be controlled manually using the touch sensors on the face of the switch, and heating can be turned on or off manually using the buttons on the relays, which glow red when on². Basic function therefore survives a lost connection, but scheduling, energy insights and remote control do not.

How the AI works: over 20,000 datapoints a day

Wondrwall's automation rests on continuous measurement. The company states that "Wondrwall AI analyses over 20,000 datapoints every day to optimise the energy performance of your home"². Those datapoints come from the sensors and switches distributed through the house, which is why the system is installed rather than retrofitted as a single device.

The distinction the company draws is between smart and intelligent. Wondrwall's own explanation is that intelligent homes employ machine learning and predictive technology to make decisions, whereas smart homes rely on timed or triggered events controlled by the homeowner. The practical difference is who sets the schedule: a smart home follows rules the household wrote, while an intelligent system adjusts them.

That approach is not unique to this product. UK Power Networks' Smart Connect service, for example, "works by using artificial Intelligence to process data about each household installation" to assess whether a supply needs upgrading, referring customers to an expert where it does and otherwise providing automatic assessment and auto approval³. Automated assessment of a household's electrical position is becoming a normal part of connection and upgrade work.

What the AI cannot do is create energy. It shifts and sequences demand, and it decides when a battery charges or a cylinder heats. The savings come from timing and from avoiding waste, not from generating anything.

Measured performance: what the trial found

The strongest independent evidence on Wondrwall comes from the NEA report published on 30 July 2025, which evaluated solar PV with electric heating in North Devon Homes. It compared two Wondrwall properties against a control property with solar PV and infrared heating panels. The finding was that "net energy consumption for the year was 50% lower for the Wonderwall house"¹.

Wondrwall's own published claims are larger. The company states that its AI-powered controls "can deliver energy bill savings" of over 80% on heating, and that the system reduces the average UK new build home's energy bill by over £1,300 a year². The example home behind that figure is described as a standard 3-bedroom new build UK home built to Part L 2021 with Wondrwall technology².

The two numbers measure different things. The NEA figure is net energy consumption across a year in a specific pair of properties; the Wondrwall figure is a modelled bill reduction for a defined house type. Neither is a guarantee for any individual home, and the gap between them is the reason to read both rather than one.

Comparable results elsewhere in the sector show the same order of magnitude. A separate case study of a Wondrwall-fitted home at Langley Grange found net energy consumption for the year was 50% lower for the Wondrwall house³. Independent work on combined clean technologies reports heating costs falling by up to 80% compared to using gas alone⁴. The direction of travel is consistent; the exact percentage is not.

Where the savings come from: solar, battery and off-peak charging

The savings mechanism is load shifting plus self-consumption. Battery storage helps a household make the most of renewable electricity from solar panels, wind turbines and hydro turbines⁵. A home battery can be charged from excess electricity generated by solar panels or other home generation, from the mains electricity supply, or from off-peak grid electricity on a time-of-use tariff⁶.

That third route is the one that works without any generation at all. If a household has an Economy 7 meter, certain energy storage products can charge from the grid and store cheap off-peak electricity⁷. Wondrwall's own system in the NEA trial paired a 5.81kW solar array with a 6kWh battery¹, so both self-consumption and off-peak charging were available.

Export is the other half. Wondrwall states that the system "will even sell surplus energy back to the grid for the highest possible price, reducing your bills even further"². The Smart Export Guarantee is the framework that obliges licensed suppliers to pay for electricity exported to the grid⁸, and some export tariffs carry no fixed end date⁸.

Cost, payback and the Energy Service Contract

Wondrwall does not publish a hardware price list. The company markets the system as "energy savings with no upfront cost"², and the commercial mechanism is the Energy Service Contract. Under it, the service charge "covers all energy management related costs, maintenance and support for the duration of the contract"², and hardware is fully maintained for the same period².

That is a different proposition from buying a thermostat or a battery outright. The household is not paying for a product and then owning it free of further charge; it is paying a recurring service charge in exchange for maintained hardware and ongoing energy management. What the household owns at the end of the contract, and on what terms it can exit, are not stated in the published material.

For context on what energy costs look like without any of this, Ofgem's cap levels for 1 July to 30 September 2025 put the annual cost of electricity for a Southern Western household at £931.90 on 3,100 kWh a year with single-rate metering, and £1,029.01 on the same consumption under a different payment method⁹. The documents give different figures for the same region and period, and the disagreement is not resolved. A household comparing a service charge against a bill should use its own consumption, not a cap illustration.

New build availability and the electrical trade

Wondrwall's route to market has been new build. The company's example home is a standard 3-bedroom new build built to Part L 2021², and its installations have been with housebuilders and housing associations rather than through a retail channel. The NEA trial properties were North Devon Homes installations¹.

New build electrical work is regulated. The guidance on designing and constructing new builds to enable smart meter installations applies to England, Scotland and Wales¹⁰. In Wales, the Building Regulations identify non-notifiable work as including any repair or maintenance work or like-for-like replacement, any addition or alteration to an existing circuit that is not in a kitchen, bathroom or outdoors, installing or upgrading main or supplementary equipotential bonding, and installing extra low voltage cabling outside bathrooms for telephone, fire alarm, burglar alarm and heating systems¹¹.

Connections follow the network operator's process. For one to four properties, Electricity North West asks for postal address and contact details, the site address for the connections, the number of connections needed, the size of incoming supply required, a site plan showing the location of the new supply, and an architect's drawing for new build properties; where planning applications have already been submitted, the reference number can be provided and the operator will source site plans from the local authority¹². In Northern Ireland, NIE Networks asks for address and contact details, a site location plan, site layout plan, floor plans and elevations, electrical load details, the planning permission reference number, a feasibility or budget request, a construction sequence for two or more phased properties, and temporary supply needs if required; customers may carry out some excavation and reinstatement work and may appoint their own approved Independent Connection Provider for some connection work¹³.

Skills are a live constraint. Research into retrofit trades in Wales found that while there may be a shortage of contractors currently delivering energy efficiency measures, there are other suitable trades who could be upskilled to deliver them¹⁴. A system that needs electrical work, network connection and commissioning sits squarely in that gap.

Support, tariffs and what owning Wondrwall means day to day

Support is stated as 24/7 live chat available to all users and website visitors². Hardware maintenance sits inside the Energy Service Contract², and the company reports being rated "Excellent" by its users on Trustpilot². Those are the maker's own statements about its own service.

On supply, Wondrwall states that the system "will work with all energy providers" but recommends a provider offering wholesale price tracking tariffs². The company is explicit that it is not an energy retailer and only provides energy management services². A household therefore keeps its own supply relationship, its own meter and its own bill.

That relationship has protections. If a supplier goes out of business, the household does not need to do anything: Ofgem states that customers are automatically moved to a new supplier and supply is not interrupted¹⁵. Switching supplier is a separate right, and the Green Deal rules note that a household can change electricity supplier as long as the new supplier is taking part in the scheme¹⁶. Where a household has its own contract with an energy supplier, it may be able to switch its business energy supplier¹⁷.

For unresolved complaints, the Energy Ombudsman service is free and easy to access¹⁸, and has provided free, independent support to consumers who have an unresolved energy complaint¹⁹. Support with bills also exists outside the supplier relationship: the Welsh government publishes help with home energy bills²⁰, Green Homes Wales requires the home to be owned by the householder²¹, and Dŵr Cymru and Welsh Water offer payment plans and water rate reductions²².

The dependence that remains is worth stating plainly. Wondrwall keeps a home on the grid and on a supplier, because the system manages energy rather than producing all of it. It adds a dependence on a home broadband connection, on the manufacturer's platform and on an Amazon account for login². The longest-term commitment is the Energy Service Contract itself, which ties maintenance and support to a continuing service charge.