Isle of Man Solar

Isle of Man Solar Guide

How to choose a solar installer on the Isle of Man

Independent Checked at the sourceLast updated

How do I choose a solar installer on the Isle of Man?

The short answer

Start with registration. The island recognises two schemes for electricians: NICEIC Domestic Installer and NAPIT Part P CPS.

Installing solar panels is notifiable electrical work under the island’s Building Regulations, and Manx Utilities will not connect anything until a Part P registered electrician has signed its connection form. Check the installer’s registration yourself, get everything in writing, and do not let anything be connected before Manx Utilities’ written approval arrives.

This guide does not recommend any company, and Manx Utilities does not either: its own page says it “cannot recommend or endorse any contractors”. What we can do is set out the rules an island installer has to work to, where to check a firm’s registration, and the questions worth asking before you sign anything.

What the law requires

Electrical work in island homes falls under Part P (Electrical Safety) of the Building Regulations 2014. Planning and Building Control lists “Installing a solar photovoltaic power supply” as notifiable work, so it has to be either reported to Building Control or certified through a recognised scheme. Building Control says those who do not comply “are committing a criminal offence”.

There are two ways the work can be signed off:

  • A registered business self-certifies. The Isle of Man Government recognises two certification schemes, NICEIC Domestic Installer and NAPIT Part P CPS. A business registered with one of them can certify its own work and issue you a certificate of compliance within 30 days.
  • Otherwise, Building Control approves it. If the electrician is not registered with either scheme, the homeowner must apply to Building Control for approval before any work starts, and pay its plan and site inspection fees.

Building Control also notes that electrical businesses on the island may belong to the Electrical Contractors Association. That is a trade body, not one of the two schemes above.

From Planning and Building Control’s page on electrical installations in homes, read on 16 October 2026.

What Manx Utilities requires

Manx Utilities’ rules sit on top of the Building Regulations, and they decide whether your system can be connected and paid for exports:

  • Written approval first. You must not connect any generating equipment to its network until you have its written approval.
  • A signed connection form. Its Test Certificate and Connection Form must be signed by a Part P registered electrician and sent to it before any connection.
  • The right standards. Generating equipment must meet the ENA’s G98, G99 or G100 standard and the BS 7671 wiring regulations, with Type Test Certification and a commissioning form.
  • Hardwired, for the export tariff. Only hardwired systems can join the Sustainable Generation tariff, which pays 9.7p for each unit exported.
  • A charge to change tariff. At least £200 plus VAT, more if its engineering checks find extra work is needed. Export capacity is capped at 10 kW, and can be reduced after network studies.

Any installer you choose should know all of this already. If they talk about connecting first and dealing with Manx Utilities later, that is the point to stop.

From Manx Utilities’ test certificate and connection form page, read on 16 October 2026, and its domestic tariffs and electricity network enquiry pages, read on 28 September 2026.

What about MCS?

You will see MCS mentioned on many British solar websites, often described as essential. MCS does not appear in Manx Utilities’ published requirements for connection or for the export tariff. The British rule that links MCS to export payments belongs to the Smart Export Guarantee, which does not operate on the island.

That does not make MCS worthless. An installer may still hold it, and it may matter to a lender, an insurer or a future buyer of your home. If an installer says they are MCS certified, you can check the claim on the MCS installer register.

Check a registration yourself

Each recognised scheme has a public search. Ask the installer which scheme they are registered with, then look them up:

If a firm says it is registered but you cannot find it, ask it for its registration number and check again. If you are unsure whether a job needs notifying, Building Control can tell you on 01624 685902 or at buildingcontrol@gov.im.

Questions to ask any installer

  1. Which scheme are you registered with? NICEIC Domestic Installer or NAPIT Part P CPS, and what is your registration number?
  2. Who deals with Manx Utilities? Will you send the application, the G98, G99 or G100 forms and the signed connection form, and wait for written approval before connecting?
  3. Have you checked planning? Roof panels need a planning application on a flat roof, in a conservation area or on a registered building.
  4. What exactly is being fitted? The make and model of the panels and inverter, and whether the inverter is on the ENA’s register.
  5. How did you work out the yearly output? Which data was used, and does it allow for shading on your roof?
  6. Is the quote itemised and in writing? Including Manx Utilities’ tariff change charge, scaffolding, and when each payment is due.
  7. What warranties come with it? For the panels, the inverter and the workmanship, who gives each one, and in writing.
  8. What paperwork will I get? The Part P certificate of compliance, the commissioning form and the equipment data sheets.

Getting more than one written quote lets you compare the answers, not just the prices. Our solar panels guide shows how much electricity panels make in different parts of the island, so you can sense-check an installer’s figures.

Related guides

Common questions

Do I need an MCS installer on the Isle of Man?

MCS is not in Manx Utilities’ published requirements. What it asks for is a Part P registered electrician, equipment to the G98, G99 or G100 standard, BS 7671, Type Test Certification and a commissioning form, plus its written approval before connection.

Is installing solar panels notifiable work?

Yes. Planning and Building Control lists installing a solar photovoltaic power supply as notifiable work under Part P of the Building Regulations 2014.

Can I install solar panels myself?

Building Control allows a competent person to do notifiable work if Building Control approves it first. But Manx Utilities requires its connection form to be signed by a Part P registered electrician before anything is connected, so a registered electrician has to be involved. Ask Building Control and Manx Utilities before you start.

Which certificate should I get when the work is done?

From a registered business, a certificate of compliance within 30 days through its scheme. If Building Control approved the work instead, ask Building Control which certificate it issues.

Can Manx Utilities recommend an installer?

No. Its own page says it cannot recommend or endorse any contractors.