An Enphase IQ8 microinverter costs about £88 to £105 excluding VAT per panel in the UK, and the full electronics package for a ten panel roof lands near £1,420 against roughly £455 for a comparable string inverter. You are paying around £97 a panel for per-panel MPPT, no high voltage DC on the roof, and a 25 year warranty. Three conditions attached to that warranty do not get quoted alongside it: it only holds if an internet-connected gateway is fitted, the gateway itself is covered for five years, and the scheme that pays an installer to come out and swap a failed unit runs for two.
Everything below comes from Enphase's own current United Kingdom documents, from live UK retailer listings, and from the Companies House register, all read on 28 September 2026. Where a figure contradicts what is circulating elsewhere, the Enphase document is the one quoted.
What Enphase kit costs in the UK
Between £88 and £106 excluding VAT for a single microinverter, and £289.45 for the gateway that every Enphase system needs. These are single-unit retail prices at Plug In Solar, a UK trade and DIY retailer, checked on 28 September 2026. An installer buying through a distributor pays less; the figures still tell you what the hardware is worth relative to the alternative.
| Item | Price ex VAT | Price inc VAT |
|---|---|---|
| IQ8MC microinverter (330 W) | £88.40 | £106.08 |
| IQ8AC microinverter (366 W) | £99.99 | £119.99 |
| IQ8HC microinverter (384 W) | £105.32 | £126.38 |
| IQ Gateway Metered, with 2 CT clamps | £289.45 | £347.34 |
| Q Cable, 1.3m portrait, per connector | £12.33 | £14.80 |
| Branch terminator | £10.25 | £12.30 |
| IQ Battery 5P retrofit package, 5 kWh | £3,108.00 | £3,729.60 |
Put that together for a ten panel roof on IQ8AC units and the conversion electronics come to about £1,423 excluding VAT: ten microinverters at £999.90, the gateway at £289.45, ten cable connectors at £123.30, and a terminator at £10.25. The nearest budget string inverter, a Growatt MIN 3600 TL-X, was listed at £455 excluding VAT two days earlier, which is covered on our Growatt inverters and batteries page. The gap is roughly £970, or about £97 a panel, before anyone has touched the roof.
Those prices exclude VAT because that is how trade listings are written. On a supply-and-install job in a home you will not add it back: solar installation is zero rated until 31 March 2027, batteries included, as set out on our 0% VAT guide. Buy the parts on their own and you pay 20%, which is the trap in reading a trade price as a consumer price.
The 25 year warranty rests on a five year part
Enphase's own GB data sheet carries the condition in a footnote: "A 25-year warranty is valid, provided an internet-connected IQ Gateway is installed." The IQ Gateway is warranted for five years. The microinverters it keeps valid are warranted for 25.
The United Kingdom warranty document effective 1 August 2026, reference WRTY-00153-1.0, sets out the schedule plainly. IQ9, IQ8 and IQ7 microinverters get 25 years from the activation date. The IQ Gateway gets five. Mobile Connect, the cellular modem some installs use where there is no household broadband, gets five. Current transformers get five. The line filter gets two. Only the IQ Meter, at 15 years, sits anywhere near the microinverter term.
Section 4 of the same document is titled Continuous Connectivity and states that the covered products "must be continuously connected to the internet during the Limited Warranty Period, except where interrupted by causes outside of the Covered Owner's reasonable control". So the connection is a condition, the hardware that provides it is a five year part, and after year five replacing it is your bill.
This is not unique to Enphase and it is worth saying so. We found the same shape on SolarEdge, where the cellular communication product runs five years against a twelve year inverter, and a harsher version on Growatt, where a ten year battery warranty drops to three without monitoring. Enphase at least does not cut the term. It just makes the term contingent on a part with a fifth of its life.
The two year labour clock nobody quotes
Enphase's warranty excludes the cost of getting to the roof, and the separate scheme that covers it only runs for the first two years after the system is switched on. On a device mounted under a solar panel, this is the single most expensive line in the small print.
Clause 7(e) of the UK microinverter warranty says the warranty "does not cover costs related to the removal, installation or troubleshooting of the Covered Owner's electrical systems". A separate document, the Labour Reimbursement for Warranty Service policy revised June 2025, fills part of that gap. It pays the installer rather than you, and although it lists the United Kingdom among its applicable regions alongside 29 other European countries, it states that "all amounts are in Euros including any applicable taxes". The rates are EUR 200 for each truck roll to a site, plus EUR 25 for each defective microinverter replaced there, EUR 150 for each IQ Battery unit and EUR 200 for an IQ System Controller.
Condition 2 is the one to read twice. The replacement must be "completed during the first two years from the date such Eligible Product is installed (permission to operate granted by authorities having jurisdiction)". After that, a warranty replacement in year nine still ships you a free microinverter, and the scaffolding, the roofer and the half day of labour to fit it are yours. Enphase also requires the claim to reach it within 90 days of the defect being discovered, and if a returned unit does not arrive within 60 days of the RMA being issued it invoices you the list price for the replacement it already sent.
Set against that, the architecture genuinely reduces how often anyone needs to go up there. Each microinverter runs its own MPPT, so a shaded or soiled panel does not drag the string down, and there is no single point of failure for the array. That is the case for paying the premium, and it is a real one. It is just not the same case as "25 years, covered".
Nine or ten panels, and then you are in G99
A single-phase Enphase array hits the G98 ceiling at nine IQ8HC units, ten IQ8AC or eleven IQ8MC, and one more panel after that turns a notify-afterwards job into an apply-first job. The threshold is 16 A per phase, which is 3.68 kW at 230 V, and it is explained in full on our G98 and G99 guide.
The neat part is that Enphase publishes the same number for its own reasons. Its GB data sheet gives a maximum unit count per single-phase 20 A circuit calculated as 16 A divided by each model's maximum output current, to size the cable and the protective device under IEC 60364. The count that keeps the cable happy is the count that keeps you inside G98.
| Model | Max AC output | Max output current | Max units, single-phase 20 A circuit | Array output at that count |
|---|---|---|---|---|
| IQ8MC-72-M-INT | 330 W | 1.43 A | 11 | 3,630 W (15.73 A) |
| IQ8AC-72-M-INT | 366 W | 1.59 A | 10 | 3,660 W (15.90 A) |
| IQ8HC-72-M-INT | 384 W | 1.67 A | 9 | 3,456 W (15.03 A) |
Add an eleventh IQ8AC and the array rates 4,026 W, which is 17.5 A and over the line. On three phase the same models allow 33, 30 and 27 units, because the limit is per phase. Enphase's installation manual adds one more UK-specific instruction: above 17 kW per phase you need a G99-approved third-party network protection relay.
Batteries count towards the same aggregate figure, and here the arithmetic bites early. The current IQ Battery 5P with FlexPhase is rated at 3.84 kVA continuous, which is 16.7 A at 230 V on its own. Any single-phase Enphase system with solar and that battery is comfortably past 3.68 kW, so it goes the G99 route or it needs a G100 export limitation scheme. The IQ8 series is certified to G98, G99 and G100, so the capability is there; it is the paperwork and the lead time that change.
What the battery actually is
The IQ Battery 5P is a 5.0 kWh AC-coupled unit with six microinverters inside it, warranted for 15 years or 6,000 discharged cycles, whichever comes first. Enphase's live GB comparison page gives the current FlexPhase version as 5.0 kWh, 3.84 kVA continuous, 980 by 550 by 188 mm, 83.0 kg, cobalt-free lithium iron phosphate. The older single-phase INT unit, data sheet DSH-00166, was specified at 3.2 kVA continuous, so a figure you find quoted depends entirely on which generation the page was written about.
The capacity retention promise is two-stage: at least 70% of nameplate at the end of year 10, at least 60% at the end of year 15. That puts Enphase between the two other brands we have read the documents for. Tesla guarantees 80% at ten years for UK installs, Growatt 60%, and Enphase 70%. Our battery storage guide covers whether a battery earns its place at all before you get to whose warranty is better.
The 6,000 cycle cap is the friendlier version of a clause that catches people out elsewhere. At one full cycle a day it works out at about 16 years 5 months, so the 15 year date arrives first and the cycle count never binds. Push past roughly 1.1 cycles a day, which a household charging off a cheap overnight tariff as well as off solar can do, and the cycles start to bind instead. Compare that with Growatt, where the throughput allowance runs out before the date on every residential model.
Two conditions are worth knowing before you buy. The warranty does not cover a battery "activated after the Energize by date indicated on the IQ Battery or IQ Battery packaging", and the installation manual tells installers to check that the installation date falls within one year of the manufacturing date. Clearance stock that has been sitting in a warehouse is a real risk, not a theoretical one. The retrofit package also assumes an Envoy-S Metered is already fitted, and the retailer selling it states that only a certified installer can buy and commission it.
Northern Ireland is not in the covered territory
Every current Enphase UK warranty document names its covered territory as "Scotland, England, and Wales". Northern Ireland is not listed, on the microinverter warranty, the storage warranty or the GB installation manual, which is headed "Applicable regions: Great Britain".
That does not leave a Northern Irish buyer without rights. The Consumer Rights Act route runs against whoever sold you the goods, and Enphase's own document spells out that "the primary responsibility to provide these remedies will sit with the seller from whom the consumer purchased the goods", so for most people that is the installer rather than Enphase. It does mean the 25 year manufacturer promise, as written, is a Great Britain document. Ask your installer to put in writing which warranty schedule applies to your system before you sign.
Northern Ireland sits outside several of the numbers on this site for the same reason: the Ofgem price cap does not apply there either, as covered on our electricity price page.
Who you would actually be claiming against
The warranty is granted by Enphase Energy, Inc. of Fremont, California, governed by the laws of England, with a Dutch importer that only registered a UK establishment in August 2025. Companies House, searched on 28 September 2026, shows Enphase Energy NL BV with a UK establishment (BR027958 and FC042839) opened on 15 August 2025, registered care of TMF Group at One Angel Court, London EC2R 7HJ, and an overseas address at Het Zuiderkruis 65, 's-Hertogenbosch.
The company that used to carry the name, Enphase Energy UK Limited (07944070) of Milton Keynes, was dissolved on 21 August 2018. The UK support line Enphase publishes, +44 (0)1908 828928, still carries the Milton Keynes dialling code. Two other results are unrelated third parties: Enphase PB Ltd, dissolved June 2023, and a Bradford company that traded briefly as Enphase Energy UK and is now Solar Maintainer Ltd, dissolved March 2023.
One practical consequence. The warranty "applies solely to product that has been imported into the European Economic Area/Switzerland/UK with Enphase's consent", and Enphase says it may refuse to activate product imported without it. Grey-market microinverters bought cheaply online are a genuine way to end up with no cover at all, and Enphase publishes an installer authorisation check for exactly this.
Transfer is possible but it is not free. A new owner keeps the warranty only if the product stays at the original location, they submit a Change of Ownership Form, and they pay a transfer fee within 30 days of the sale. That is better than Growatt, whose battery warranty is non-transferable outright, and worse than Tesla's, which follows the house without a fee. If you are weighing what solar does to a sale, our guide on whether solar panels add value covers the wider question.
Where Enphase fits, honestly
Enphase earns its premium on complicated roofs and loses the argument on simple ones. If your array faces one direction, has no shading and fits on a single plane, a string inverter converts it at a comparable efficiency for around a thousand pounds less on a ten panel job, and there is one box to replace in fifteen years rather than ten units on a roof.
The case turns when the roof does. Multiple pitches, a chimney, a dormer, a tree at the bottom of the garden, or a plan to add panels later all favour per-panel conversion, and Enphase's own compatibility rules are unusually permissive: no enforced DC to AC ratio, and panels can differ in quantity, type, age and orientation. IQ8 units can also be added to an existing IQ7 system on the same gateway, though not the other way round, which matters if you are extending an array fitted years ago.
There is a safety argument too, and it is the strongest non-financial one. Conversion happens at the panel, so the roof carries low voltage DC over short leads and AC the rest of the way, instead of a high voltage DC string running down into the house. Enphase's data sheet calls it "low-voltage DC and rapid shutdown for the ultimate fire safety". Our page on solar fire risk puts that in proportion, because the underlying risk is low either way.
Two small things that get overstated in both directions. Efficiency is a wash: the IQ8 series posts a European weighted efficiency of 96.6% to 96.8%, which is competitive but not class-leading, and the difference against a good string inverter is worth a few pounds a year, not a decision. And the night-time drain people worry about is trivial: 50 mW per unit, so ten microinverters idling through roughly 4,400 dark hours cost about 2.2 kWh a year, under 60p at the 26.32p price cap rate for October to December 2026.
If you are still deciding between per-panel electronics and a single box, read the inverter types guide first and then our page on whether optimisers are worth it, which covers the middle option. For the whole-system picture, start at what solar panels cost in the UK, and when you are ready to price it, ask installers for itemised quotes that name the microinverter model, the gateway and both warranty schedules.
Get the model names, not just the brand
An Enphase quote that says "microinverters" and nothing else is hiding about £17 a panel (ex VAT) between the IQ8MC and the IQ8HC, and a G98 or G99 decision with it. Ask for the line items.
Frequently asked questions
About £88 to £106 excluding VAT each, depending on the model. At a UK retailer on 28 September 2026 the IQ8MC listed at £88.40, the IQ8AC at £99.99 and the IQ8HC at £105.32, all excluding VAT. You also need an IQ Gateway at £289.45 and cabling at roughly £12 per connector, so a ten panel system's conversion electronics come to about £1,423 excluding VAT, against roughly £455 for a comparable budget string inverter. That is a premium of about £97 a panel.
Yes for the microinverter, but only while an internet-connected gateway is fitted, and the gateway is covered for five years. Enphase's GB data sheet states in a footnote that "a 25-year warranty is valid, provided an internet-connected IQ Gateway is installed", and the UK warranty document effective 1 August 2026 gives IQ7, IQ8 and IQ9 microinverters 25 years from activation while giving the IQ Gateway, Mobile Connect and the current transformers five years each. Section 4 makes continuous internet connection a condition of the warranty.
Only for the first two years, and it pays the installer rather than you. The warranty itself excludes "costs related to the removal, installation or troubleshooting of the Covered Owner's electrical systems". A separate Labour Reimbursement policy pays EUR 200 per truck roll plus EUR 25 per microinverter replaced, but requires that the replacement is completed within two years of the system receiving permission to operate. A warranty swap in year nine means a free part and a bill for the scaffolding and the labour.
On single phase, nine IQ8HC, ten IQ8AC or eleven IQ8MC. The G98 threshold is 16 A per phase, which is 3.68 kW at 230 V. Enphase's own data sheet publishes the same counts as the maximum units per single-phase 20 A circuit, calculated from each model's maximum output current of 1.67 A, 1.59 A and 1.43 A. Ten IQ8HC units would rate 3,840 W and 16.7 A, over the line, so that system needs a G99 application to the network operator before it is installed.
It is a competent mid-tier battery with a clearer cycle allowance than most. The current FlexPhase version stores 5.0 kWh, delivers 3.84 kVA continuously, uses cobalt-free lithium iron phosphate and weighs 83 kg. The warranty runs 15 years or 6,000 discharged cycles, whichever comes first, and guarantees at least 70% of nameplate capacity at ten years and 60% at fifteen. At one cycle a day the 6,000 cycle cap works out at about 16 years 5 months, so the date binds first rather than the cycles.
The documents name Scotland, England and Wales only. Both the current UK microinverter warranty and the storage warranty state a covered territory of "Scotland, England, and Wales", and the installation manual is headed "Applicable regions: Great Britain". Northern Irish buyers still have Consumer Rights Act 2015 rights against the seller, and Enphase's own wording confirms that the primary responsibility sits with whoever sold the goods, which for most installs is the installer. Ask for the applicable warranty schedule in writing before signing.
Yes, if you pay for it. Enphase transfers cover to a new owner provided the product stays at the original location, the buyer submits a Change of Ownership Form, and they pay a transfer fee within 30 days of the transfer. That is more generous than Growatt, whose battery warranty is non-transferable, and less generous than Tesla's, which follows the property at no charge. The fee is set by Enphase and can be adjusted at its discretion.
They remove high voltage DC from the roof, which is the main safety argument for them. Each panel's DC output is converted at the panel over short low-voltage leads, so no high voltage DC string runs down into the building, and rapid shutdown is built in. Enphase's data sheet describes this as "low-voltage DC and rapid shutdown for the ultimate fire safety". The absolute risk from a correctly installed string system is already low, so treat this as a sensible margin rather than a reason on its own.
Yes, and the amount is negligible. Enphase's data sheet gives a night-time power loss of 50 mW per microinverter. Ten units idling through roughly 4,400 dark hours a year consume about 2.2 kWh, which is under 60p at the 26.32p per kWh price cap rate for 1 October to 31 December 2026. It is not a reason to choose or reject the technology.
Yes, but not the reverse. Enphase states that IQ8 series microinverters can be added to an existing IQ7 system on the same gateway, combiner or system controller, in solar-only or solar-plus-battery configurations. IQ7 units cannot be added to a site that already runs IQ8 units on the same gateway, and a mixed IQ7 and IQ8 system loses the IQ8-specific sunlight jump start feature. If you are extending an array, tell the installer what is already on the roof.
Sources checked live on 28 September 2026: Enphase Warranty, Microinverter, United Kingdom, WRTY-00153-1.0, effective 1 August 2026; Enphase Warranty, Storage Systems, United Kingdom, LGL-00097 v2.0, effective 15 September 2025; Enphase IQ8 Series Microinverters data sheet, DSH-00198-5.0, March 2026; IQ8MC, IQ8AC, IQ8HC and IQ8X Microinverters installation and operation manual, applicable region Great Britain; IQ Battery 5P data sheet DSH-00166-1.0; Enphase Compare IQ Batteries page (en-gb); Enphase Labour Reimbursement for Warranty Service, LRP-00001-2.0, June 2025; Plug In Solar and Solareon UK product listings; Companies House register, companies 07944070, BR027958 and FC042839; Ofgem energy price cap unit rates, 1 October to 31 December 2026; HMRC VAT Notice 708/6; Energy Networks Association EREC G98, G99 and G100 guidance.