Can you put solar panels on a garden shed?

Yes, as long as the shed roof is structurally sound and gets decent sun. A light timber shed may need strengthening first. The panels are then wired back to the house so the electricity powers your home.

Do solar panels on an outbuilding qualify for the SEAI grant?

They qualify when the panels feed your home on the same electricity supply and the house meets the grant rules, including being built and occupied before 2021. Panels on a shed with its own separate meter do not count toward the domestic grant.

How far can a shed be from the house for solar panels?

There is no fixed limit, but longer runs cost more and need a thicker cable to manage voltage drop. An installer sizes the cable to the distance. A detached shed well across a garden is still workable, it just adds trenching and labour.

Do you need planning permission for solar panels on a detached garage?

In most cases no, since rooftop solar exemptions were widened in 2022. Conditions still apply around protected structures, conservation areas and airport safeguarding zones. Check with your local planning authority before ordering if the building is unusual or protected.

Can solar panels on a shed charge an EV or run the shed itself?

Yes. Once the array is tied back to your home supply, that power can run anything in the house, a shed socket or an EV charger. Daytime charging is where an outbuilding array pays off most, as you use the solar directly.

Can you fit solar panels to a metal or corrugated shed roof?

Yes, profiled and corrugated metal roofs are common on sheds and take panels well with the right clamp or metal-deck mounting system. A load check confirms the roof can carry the array. Older asbestos sheeting should be replaced before any install.

Solar Panels for Sheds and Outbuildings Ireland

Yes, you can fit solar panels to a shed, garage or outbuilding roof in Ireland, and most homeowners do it to power the main house rather than the shed itself. The panels sit on the outbuilding, but the electricity is wired back to your home.

That one detail decides almost everything. Solar panels for sheds and outbuildings only cut your bills, and only earn the SEAI grant, when they feed your home on the same electricity supply. Get that right and a spare roof becomes useful generation.

This guide covers when outbuilding solar is worth it, whether it qualifies for the grant, what the roof needs to handle, how the cable run to the house works, and where planning permission comes into it.

Can You Put Solar Panels on a Shed or Outbuilding in Ireland?

You can put solar panels on almost any outbuilding roof in Ireland, as long as the structure is sound and the power can route back to your home. Detached garages, barns, large garden sheds and farm sheds are all common hosts. The roof just needs to carry the weight and catch enough sun.

Common outbuildings that take panels well:

Detached and attached garages
Large garden sheds and workshops
Farm sheds and agricultural outbuildings
Garden rooms and home offices

The practical split is attached versus detached. An attached or integral garage shares a wall and usually the electrics with the house, so wiring the panels in is short and cheap. A detached shed at the end of the garden needs a cable run back to the house. That adds some cost and a little planning, but it rarely rules solar out.

Do Solar Panels on a Shed Qualify for the SEAI Grant?

Solar panels on a shed or outbuilding qualify for the SEAI grant when they are wired back to your home and the home itself is eligible. The grant funds a domestic system, so the panels have to feed your house on the same electricity supply, not a separate meter sitting on the shed.

The current grant, set by the SEAI solar electricity grant, pays €700 per kWp up to 2kWp, then €200 per kWp up to 4kWp, to a maximum of €1,800. To qualify, your home must have been built and occupied before 2021, and the work must be carried out by an SEAI-registered installer.

For an outbuilding, the deciding test is the electricity supply. If the shed draws from the same supply as the house (one MPRN), panels on its roof count as part of your home system and the grant applies. If the shed sits on its own separate supply, they fall outside the domestic grant.

This is where full grant handling earns its keep, since the application has to present the outbuilding array as part of the house rather than as a standalone system. If you want the detail before you commit, how the domestic grant works is set out in full on the grants hub.

Is Your Shed or Garage Roof Suitable for Solar Panels?

A shed roof is suitable for solar when it faces roughly south, east or west, has a clear run of sun, and is strong enough to carry the panels for 25 years. Pitch, roof material and shading matter more than the size of the building. A small, bright garage roof often beats a large, overshadowed one.

What a surveyor checks on an outbuilding roof:

Outbuilding roof	What to check
Slate or tiled garage	Pitch and condition, treated like a house roof
Profiled or corrugated metal shed	A metal-deck mounting system and a structural load check
Flat felt or single-ply roof	A ballasted or framed mount, and whether it can take the weight
Older asbestos cement sheet	Usually ruled out until the sheet is replaced

Older sheds are the common sticking point. A roof that already sags, leaks or carries asbestos sheeting needs sorting before any panels go up. This is where an engineering-led survey pays off, because the mount has to suit the exact roof rather than a generic rail kit. If the roof genuinely cannot host an array, ground-mounted solar panels beside the outbuilding are often the better answer.

How Much Do Solar Panels for a Shed Cost in Ireland?

Solar panels for a shed cost much the same per kWp as panels on a house, because the hardware is identical. The grant still takes up to €1,800 off a qualifying system, so the headline figure lands close to a standard home install.

The cost unique to an outbuilding is the cable run back to the house. A short link from an attached garage is cheap. A long trench across a garden to a detached barn adds labour, armoured cable and reinstatement, and that gap widens with distance. It is the single number most generic cost guides leave out.

For a figure matched to your own roof size and layout, run the numbers before you ask for a quote.

How Does Wiring From a Shed to the House Work?

Wiring a shed solar system to the house runs a cable from the outbuilding back to your main consumer unit, so the panels feed the whole home on one supply. On a detached building this usually means a steel wire armoured (SWA) cable in a buried trench along the shortest safe route.

The inverter normally sits inside the shed or garage, close to the panels, and the cable carries the output to the house. Over longer distances the cable has to be sized up to limit voltage drop, which is part of why the run affects cost. A Safe Electric registered electrician handles the connection and the tie-in to your existing board.

Keeping everything on the one MPRN is what makes the array part of your home. It is also what lets a monitoring app show the whole system as a single setup rather than two disconnected ones.

Do You Need Planning Permission for Solar Panels on a Shed?

Most rooftop solar in Ireland is now exempt from planning permission, including panels on a house and on many outbuildings, following the 2022 regulations. A detached shed is not an automatic free-for-all, though, so the exemption comes with conditions worth checking first.

The points that most often apply to an outbuilding:

Minimum distances from the edges of the roof
Tighter rules for protected structures and Architectural Conservation Areas
A 300 square metre cap per roof inside a Solar Safeguarding Zone near an airport

You can see the full detail in the government’s solar planning exemptions, which sets out what each building type is allowed.

Because a detached outbuilding does not always fall under the same heading as a house, it is worth a quick check with your local planning authority before you order anything, especially for a larger barn or a building near a conservation area. Our guide to planning permission for solar panels walks through the exemptions in plain terms.

When Shed and Outbuilding Solar Actually Makes Sense

Shed and outbuilding solar makes the most sense when your house roof cannot do the job, or when the outbuilding simply has the better roof. A shaded, north-facing or small house roof sitting next to a wide south-facing garage is the classic case for moving the array across.

It tends to stack up well when:

The house roof is overshadowed, the wrong orientation or too small
A garage or barn roof is large, south-facing and close to the house
You want to protect a slate roof or a recent re-roof from fixings
A farm or workshop already uses a lot of daytime electricity

The outbuilding becomes the generation point while the house stays the place you use the power. For the full picture of how a whole-home setup is sized and designed, see a properly designed home solar system and how the parts fit together.

A spare roof on a garage, barn or large shed is often the easiest way to add generation when the house roof falls short. The system that pays off is the one designed around your supply, your roof and the cable run, not just the panel count. Book a free site survey and quote on (01) 485 3738 to see what your outbuilding roof could deliver.