Do I have to use one of these companies to get the grant?

Yes. SEAI only pays a grant on work done by a company on its register, and the company claims it on your behalf. Work done by anyone else is not covered, however good it is.

How many quotes should I get in Donegal?

Three, from companies registered for the same job, and ask each for a written breakdown. Quotes for the same house often differ by thousands because they include different work, not because one is dearer.

Is this list in any order of merit?

No. Companies based in Donegal come first, then the ones that travel to it, then One Stop Shops, then alphabetical. Being on the register means the paperwork is in order, not that the work is good.

Solar hot water installers in Donegal

59 companies on the SEAI register are based in or serve Donegal for solar hot water (register as of 8 September 2026).

Based in Donegal

6 of them. Sorted by what they are registered for, then by name — this is not an order of merit.

Adrian Sweeney Plumbing & Heating Contractors
Heat pumpHeating controlsSolar hot water
Based in Donegal · serves Ulster · SEAI no. 13094
Based in Donegal.
Efficient Renewables Ltd
Heat pumpHeating controlsSolar hot waterSolar panel
Nationwide · SEAI no. 16225
Based in Donegal.
Ferm Eng Ltd
Attic insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panel
Based in Donegal · and 8 other counties · SEAI no. 10112
Based in Donegal.
FS Plumbing & Heating Ltd
Attic insulationHeat pumpHeating controlsInternal wall insulationSolar hot water
Based in Donegal · serves Dublin and Ulster · SEAI no. 10505
Based in Donegal.
N W Renewables Ltd
Heat pumpHeating controlsSolar hot water
Based in Donegal · serves Ulster · SEAI no. 17840
Based in Donegal.
VKG Trading Ltd
Heat pumpHeating controlsSolar hot water
Based in Donegal · serves Connacht and Ulster · SEAI no. 13102
Based in Donegal.

Also cover Donegal from elsewhere (53)

These told SEAI they cover the province Donegal is in, or listed it among the counties they serve. Ask how far they travel before you go any further. Names only here; each one's full register row is on its own county page. OSS = One Stop Shop.

Ashgrove Engineering Ltd T/A Ashgrove Renewables (OSS) · Bayview Contracts Ltd (OSS) · Bord Gais Energy Ltd (OSS) · Breffni Insulation Ltd (OSS) · Churchfield Home Services (OSS) · Cooper Insulation Ltd. (OSS) · Electric Ireland Superhomes (OSS) · Envirobead Ltd. (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Moston Construction Ltd (OSS) · OHK Energy LTD (OSS) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · Allbrite Heatpump Specialists Ltd · Alternative Heating & Cooling Ltd · Anthony Brady Plumbing Limited · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Breen Heating and Plumbing Ltd · Breffni Renewables Ltd · CGP · Ciocan Construction Ltd · Cok Electrical & Renewables Ltd · Cowan Heating and Plumbing LTD · Cunningham Mechanical Services Ltd · DT Plumbing & Heating Ltd t/a M3 Plumbing &Heating · Ecoflex Energy Ltd · Energy Saving Technologies Ltd T/A Energlaze · F Jordan Plumbing + Heating · FND Heating Ltd · Gilroy Heating Services Ltd · Green Energy Heating Solutions Limited · Greentherm Ltd. · Hagim Gas Ltd · J & D O'Brien Ltd · James Donnelly Eco Heating Ltd · Jason Fahy Heating · LVP Renewables Ltd · M & C Hybrid Energy Ltd · Marron Activ 8 Energies Ltd · Mc Elligott Heating & Plumbing Limited · Mullagh Heating And Plumbing Ltd · Niall Smith Energy Renewables Ltd · NZEB Technologies Ltd · PMK Mechanical Ltd. · Ramor Renewable Heating and Plumbing · Royal Renewables Ltd · Solaregy T/A Sola · Solaris Green Energy

What it costs, and what the grant pays

The grant for a semi-detached house is €1,200. These are national figures, not Donegal ones — SEAI does not publish prices by county.

What it costs on a home like yours, and what you are left paying

Before you sign

Wait for your grant approval email before any work starts. SEAI does not pay for work that began before it was approved.
Get at least three quotes, and check each one covers the same job — the cheapest quote is often the one that leaves something out.
Check the company is on the register on the day you sign. Companies join and leave it, and this page is a copy taken on one day.
Get it in writing: what is being done, what it costs, when it starts and when it is finished.

How the application works

Ask up to five of them

Fill in one form, tick who you want to hear from, and we pass your details to those companies and nobody else. It costs nothing and you are under no obligation.

Get solar hot water quotes in Donegal

Common questions

Do I have to use one of these companies to get the grant?: Yes. SEAI only pays a grant on work done by a company on its register, and the company claims it on your behalf. Work done by anyone else is not covered, however good it is.
How many quotes should I get in Donegal?: Three, from companies registered for the same job, and ask each for a written breakdown. Quotes for the same house often differ by thousands because they include different work, not because one is dearer.
Is this list in any order of merit?: No. Companies based in Donegal come first, then the ones that travel to it, then One Stop Shops, then alphabetical. Being on the register means the paperwork is in order, not that the work is good.

Other work in Donegal

Listed on SEAI’s public registers on 8 September 2026. Being registered is not an endorsement by SEAI or by us. Check the current register on seai.ie before you sign anything. Not affiliated with SEAI.