Myenergi: zappi, eddi and the Grimsby-built range

myenergi is a British smart home energy technology manufacturer whose stated purpose is to connect "your solar, battery, EV charger and hot water in one intelligent ecosystem"¹. Its patented technology monitors a household's energy generation and usage, working to maximise the use of self-generated energy and minimise grid consumption¹. The company has shipped over 500,000 British-made home technology products worldwide², and its best-known product, the zappi EV charger, has become one of the most recognisable home charge points on UK walls.

The range is built around a simple idea: a home that generates its own electricity should use that electricity itself, rather than exporting it cheaply and buying it back expensively. The zappi charges a car, the eddi diverts surplus solar power into hot water, the libbi stores energy in a battery, and the harvi measures generation wirelessly, with all of it controlled through one app³. For a household working towards energy independence, that coordination is the point: each device alone is useful, but the ecosystem is what turns generation into self-consumption.

What myenergi makes: one ecosystem, five devices

The myenergi ecosystem consists of the zappi EV charger, the libbi home battery, the eddi solar power diverter, the harvi wireless energy monitor, and the myenergi app that ties them together⁸. The company sells it as a full product line of zappi and GLO chargers, the libbi battery system and the eddi diverter, all controlled through one app⁹. The devices are designed to work together as green energy solutions, which myenergi argues makes solar one of the most cost-effective home investments available⁸.

The zappi is the anchor product and the reason most households find the brand. The eddi sits alongside it as a power diverter: when solar panels generate more than the home is using, the eddi sends the surplus into an immersion heater rather than letting it export. The libbi extends the same logic to stored electricity, and the harvi is the wireless sensor that reports generation and usage to the other devices without needing a cable run to the consumer unit. A bundle offered through a Santander partnership shows how the pieces combine in practice: a 7kW tethered zappi, an eddi and a 10kWh libbi sold as one package¹⁰.

For a wider view of the brands making charging equipment sold in the UK, see the guide to home EV charger manufacturers, and for storage, home battery storage manufacturers. The full list of brands covered on this site is on the manufacturers pillar page.

Choosing your Zappi charger: cable options and power ratings

The zappi is sold in two output ratings and two cable arrangements. An independent product listing gives maximum charging speeds of 7.4kW or 22kW⁶, while myenergi's own material describes the 7kW version as available tethered or untethered¹⁰. The 22kW version is a three-phase device: myenergi's own guidance uses the 7kW zappi as its example of a home charger and the 22kW zappi as its example of a workplace charge point¹¹, which reflects the reality that most UK homes have a single-phase supply on which a 22kW unit cannot deliver its full rate.

Tethered means the cable is permanently attached to the charger; untethered means you supply your own cable and plug it in at both ends. The choice is practical rather than technical: a tethered unit is ready every time you arrive home, an untethered unit is neater and lets you swap cables if you change car. Beyond the cable, the zappi's defining feature is its compatibility with all domestic microgeneration technologies, including solar and wind¹², which is what earns it the "solar-compatible" label most buyers know it by.

The zappi GLO is a variant of the charger, described by myenergi as designed and manufactured in Britain and backed by a national Product Champion installer programme¹³. myenergi also states it was the first manufacturer to introduce PEN fault testing, the safety check that protects a charger from a fault in the electricity supply's protective earth and neutral arrangement¹⁴.

British-built: how myenergi products are made in Lincolnshire

myenergi designs and manufactures its products at a UK facility in Lincolnshire¹⁵, and describes the zappi as "conceived, evolved, and manufactured in-house right here in the UK"⁷. The company traces its own story from "starting out in the Humber Freeport, the epicentre of green technology in the UK"¹⁶, and its early identity is tied to Binbrook in Lincolnshire, from where it celebrated the zappi's second birthday in 2023¹⁷. Its EV chargers are described as "designed and manufactured right here in Britain"², a claim the company links to supply chain resilience for its anti-tamper retrofit kits¹⁸.

For a household, UK manufacture matters in two concrete ways. Parts and replacements travel a shorter distance, and myenergi states it processes and dispatches replacements within approximately 48 hours of a fault being reported¹⁹. It also means the design, tooling and support operation sit inside one company and one country, rather than being split across a contract manufacturer abroad and a brand office in the UK. The company runs a dedicated in-house team of specialist installers across the UK, complemented by a network of authorised subcontractors².

There is a parallel Irish operation: myenergi's Irish pages describe a dedicated team of designers, engineers, sales and support specialists based in Ireland²⁰, and the Irish product pages describe the zappi as manufactured in-house in Ireland²¹. The UK and Ireland operations serve separate markets with separate support lines. More on where home energy products are made generally is in where home energy products are made.

Inside the patented eco-smart system

The technology at the heart of every myenergi device is what the company calls eco smart. Its own description is that it "makes intelligent decisions based on your self generated power and the energy tariff you are signed up to", optimising for drawing energy from the grid at the lowest possible rate per kWh²². In other words, the devices read two things at once: how much electricity the home is generating, and what that electricity costs at that moment.

For a solar household, the practical effect is that surplus generation is used in the home rather than exported. The zappi can charge a car with 100% green energy when generation allows⁴, and the myenergi app lets a household control and optimise all of its smart energy devices in one place²³. The app provides access and control from anywhere, with visual graphs of import and export information¹⁴. The zappi has also been integrated into the Hive Home app, allowing users to control the device and see detailed insight into their energy use through a second ecosystem²⁴.

The important caveat is that tariff optimisation only works if the charger knows the tariff. The eco-smart decisions are only as good as the tariff information the household supplies, and the lowest-rate optimisation is a grid-facing feature: it is about buying from the grid cheaply, not about avoiding the grid. The self-consumption side, charging the car and heating water from your own generation, is the independence half of the technology, and it works without any tariff at all.

Cover of three years, with an option to extend to five

myenergi products are protected for three years from the date of purchase against faults in material and workmanship¹⁹. The formal warranty terms name the covered products as the Zappi, Zappi Pedestal, Eddi, Harvi, Hub and Libbi, purchased on or after 24 November 2023²⁵. The warranty can be extended: the terms allow a further 24 months by purchasing an extended warranty²⁶, and myenergi's extended warranty pages describe extending the standard 3-year period to a total of 5 years for zappi and eddi products²⁷. The extension must be bought no later than one month before the standard warranty expires²⁷.

To make a claim, the warranty requires that faults are reported to the myenergi support team first, either by calling +44 (0)333 300 1303 or emailing support@myenergi.com, with proof of purchase²⁵. The remedy is set out plainly:

Myenergi product warranty terms²⁶

Two conditions in the terms deserve attention. Replacement products may be refurbished or contain refurbished materials, and are covered only for the remaining term of the warranty period²⁶. And all site visits must be authorised by the tech support team before being undertaken: unauthorised visits will not be compensated by myenergi¹⁹. Registration matters too: myenergi asks owners to register individual products once installed to take full advantage of the warranty support²⁹. General guidance on this is in manufacturer warranties and registering a warranty.

Cost and buying: what a zappi actually costs

There is no single manufacturer list price for a supplied-and-fitted zappi; the figures that exist come from suppliers and independent listings, and they differ. OVO quotes myenergi chargers "from £949 with installation", including a 3+ year warranty⁵. An independent product listing puts the zappi itself at £779 plus installation⁶. The Energy Saving Trust gives the typical cost of installing a home charge point as around £800 to £1200³⁰, which is the fitting cost on top of the hardware, not the whole job. For the zappi GLO, a supplier lists a standard price from £999, with a discounted price from £849³¹. VAT treatment is not stated in these figures, so they should be read as quoted prices rather than confirmed VAT-inclusive ones.

Buying routes differ. Distributors stock the zappi in the UK with fast delivery³², and myenergi sells direct, including direct purchase in Northern Ireland¹⁴. myenergi also lets a household book a zappi home installation directly in a few steps¹⁶. The choice between routes is covered in buying direct from a manufacturer or through an installer. What moves a quote is the output rating, the cable arrangement, and the distance between the charger position and the consumer unit.

Reaching 500,000 units sold and £160 million in revenue

myenergi announced in June 2023 that it had surpassed 500,000 unit sales, with cumulative revenues of more than £160 million to date³³. The same announcement reported growth of 96% in its last year, compared with 40% growth in pure electric car registrations over the same period³³. UK sales of the zappi almost doubled year on year: from around 29,000 units in 2021 to more than 55,000 in 2022³³.

The installed base is international as well as domestic: myenergi reports over 350,000 products installed across 10 countries³⁴. For a buyer, scale matters in two ways. A large installed base means faults are well understood and firmware is exercised across many systems, and it means the company is not a startup whose warranty depends on survival. The ownership and parent group context is in who owns which energy brand, and what happens when a maker does fail is covered in manufacturer failures and orphaned products.

Getting help: customer support, returns and ways to make contact

Support is UK based, and myenergi describes it as "friendly and knowledgeable UK based tech support"²³. The main UK contact number is 0333 300 1303³⁴, with sales enquiries at sales@myenergi.com⁷. In Ireland the number is +353 1 200 3003, and from Northern Ireland 028 2044 0606, with returns and installer queries in Ireland handled through ireland.admin@myenergi.com¹⁹. Be realistic about wait times: myenergi states that phone waits currently range from 5 to 50 minutes, and can be longer during peak periods¹⁹.

Returns run on a 14 day policy for a full refund, from the date the item was received. The item must be in pristine condition and come complete with the original undamaged packaging, and a Return Merchandise Authorisation number must be clearly marked on the packaging before the item is returned. myenergi refunds shipping charges up to, and not exceeding, the cost of second-class shipping¹⁹. Once a warranty replacement is agreed, replacements are dispatched within approximately 48 hours of the fault being reported, though this is not guaranteed, and an email with return instructions follows within 24 hours¹⁹. Installer invoices for warranty work are processed within 21 days of receipt¹⁹. More on this area generally is in manufacturer technical support and spare parts.

Energy independence with myenergi products

The honest summary is that myenergi kit increases self-consumption but does not remove dependence. A zappi, eddi and libbi together let a household charge a car, heat water and store electricity from its own generation, and the eco-smart technology shifts grid purchases to the cheapest hours when self-generation is not enough²². That is a real reduction in what a household buys and at what price, and it is the core of what the brand sells.

The dependencies that remain are worth naming. The devices still draw from the grid through an electricity supplier, and the tariff-optimisation feature is explicitly a grid-facing function. The app, the remote control and the energy graphs depend on an internet connection and on myenergi's own app and servers¹⁴, though the charger's local controls keep working without them. The warranty depends on the company's continued existence and on authorised support channels¹⁹. And the smart-charging regulations landscape keeps moving: myenergi supplies free anti-tamper retrofit kits for zappi, but these must be ordered through a myenergi trade account¹⁸, so a household depends on its installer for that route.

Set against that, the fundamentals are strong: UK manufacture with fast replacement dispatch¹⁹, a five-year warranty ceiling when the extension is bought in time²⁷, and an installed base of hundreds of thousands across ten countries³⁴. How manufacturers fit into household independence generally is explored in manufacturers and household energy independence, and the software side of product lifespan in firmware updates, app support and product lifespan.