Solar Panels Roscommon — Costs, Grants and Local Installers in 2026

A 4 kWp solar panel system in Roscommon costs between €8,000 and €10,500 installed, or roughly €6,200–€8,700 after the SEAI Solar Electricity Grant of up to €1,800. Roscommon has 9 SEAI-registered solar installers based in the county — one of the lower county totals — but installers from Galway, Athlone, and Sligo regularly cover the area, so getting 2–3 competitive quotes is achievable. Payback on a well-positioned Roscommon system typically runs 8–11 years, reflecting the county's west midlands irradiance levels.

Roscommon records solar irradiance of roughly 900–950 kWh/m² per year — below the national average of 950–1,000 kWh/m² and well below the figures for Cork or Wexford. That is not unusual for a west midlands county. It means a 4 kWp system here generates around 3,200–3,500 kWh annually rather than the 3,400–3,700 you would see in Cork. The economics still work, particularly for homes with high daytime electricity use — and for farms using TAMS III, the sums look different again. On grant eligibility, Roscommon is treated identically to every other county under the national SEAI scheme.

Solar Panel Costs in Roscommon — 2026

Typical installed costs for Roscommon residential systems, May 2026. Gross figures cover supply, installation, inverter, and commissioning on a standard south- or southwest-facing roof. After-grant figures apply the full SEAI Solar Electricity Grant. Annual savings assume 30% self-consumption at a blended rate of 28c/kWh plus Clean Export Guarantee payments — your actual figure will vary by daytime usage pattern and your supplier's export rate.

The grant is capped at €1,800 regardless of system size. Adding a battery typically adds €2,500–€4,500 to the gross cost and is not covered by the SEAI Solar Electricity Grant. For a full breakdown of how system size affects cost and payback across Ireland, see our solar panels cost Ireland guide.

Note on cost ranges: With only 9 locally based SEAI-registered installers in Roscommon, quote variation can be wider than in counties with deeper installer markets. Installers travelling from Galway or Athlone may include a distance allowance in their pricing. Requesting 2–3 quotes rather than accepting the first one you receive is worth the extra time here more than in most counties.

How Much Electricity Will Solar Generate in Roscommon?

Roscommon sits in the west midlands, roughly between the Shannon and the Connacht coast. The county's irradiance of 900–950 kWh/m² per year places it in the lower-middle tier nationally — below Cork (1,050–1,100 kWh/m²) and Wexford, but broadly similar to neighbouring Leitrim and Longford. The practical difference between a Roscommon and a Cork system of the same size is around 8–12% less annual output.

For a well-sited Roscommon system — south- to southwest-facing, 30–40 degree pitch, minimal shading — expected annual generation is:

A typical three-bed home in Ireland uses 4,200–5,000 kWh/year. A 4 kWp Roscommon system generating 3,200–3,500 kWh covers 65–80% of that annual consumption in terms of generation volume — but timing is what matters. Solar generates during daylight. If the bulk of your electricity use is in the evening, you export most of what you produce and save only on the portion you self-consume. Homes with high daytime usage — remote workers, households running heat pumps or EV chargers through the day — see the strongest returns.

Many Roscommon homes are detached or semi-detached with generous roof areas and little of the urban shading (neighbouring buildings, walls, trees) that constrains output in city settings. That is a genuine advantage. East- or west-facing roofs lose around 15–20% of output versus a south-facing equivalent. Get a written generation estimate based on your actual roof before committing.

Solar Installers Covering Roscommon

Roscommon has 9 SEAI-registered solar installers based in the county as of May 2026. That is one of the lower county totals in Ireland — compare it to Cork (72 registered) or Dublin (112 registered). The practical consequence is straightforward: you are less likely to have three registered installers within 20 km of Roscommon Town than a homeowner in Cork is, and you should expect at least some of your quotes to come from installers based in adjacent counties.

The good news is that Galway, Athlone, and Sligo-based installers routinely cover Roscommon. Athlone sits on the county's eastern border and functions as a regional hub for solar installations across Roscommon, Westmeath, and parts of Longford. Galway city-based contractors frequently work across north and west Roscommon. Because the county is relatively flat with good road access, travel time is not a significant barrier for most properties.

What to check before signing

• SEAI registration: Verify your installer is on the SEAI registered companies list at mgen.seai.ie at the time of quoting. Registration can lapse; always confirm it is current, not just that the company was registered at some point in the past.
• Safe Electric / RECI certification: Solar PV involves electrical work. Your installer must hold a Safe Electric registration (the consumer-facing name for the Register of Electrical Contractors of Ireland, RECI). You can verify this at safeelectric.ie. SEAI registration and Safe Electric / RECI certification are two separate registers — an installer needs both.
• Site visit before signing: Given that some Roscommon installers will be travelling from neighbouring counties, confirm that a site visit — or at minimum a satellite imagery review of your roof — is included before any contract is signed. Quotes without a roof survey are estimates, not firm prices.
• Written quotation detail: The quote should specify system size in kWp, panel brand and model, inverter brand, estimated annual generation for your roof orientation, and total price at 0% VAT. If any of those are missing, ask before signing.
• Guarantee terms: Panels typically carry a 25-year linear performance warranty (around 80–85% output at year 25). Inverters are usually 5–10 years. Know who backs the warranty if the installer is no longer trading in year 15 — particularly relevant in a county where the installer base is smaller.

VAT on Roscommon solar installs

Residential solar PV supply and installation is charged at 0% VAT in Ireland since May 2023. This applies across the Republic, including Roscommon. Commercial installations are not covered by the 0% residential rate. Any quote for your home should show 0% VAT — if it shows a different rate, query it before accepting.

The SEAI Solar Electricity Grant in Roscommon

The SEAI Solar Electricity Grant works the same in Roscommon as it does in every other county — one national scheme, one set of rules. It is administered by the Sustainable Energy Authority of Ireland (seai.ie) and is currently worth up to €1,800.

Grant tiers (verified against seai.ie, May 2026)

• First 2 kWp: €700 per kWp (€1,400 for 2 kWp)
• Next 2 kWp: €200 per kWp
• Maximum: €1,800 (reached at 4 kWp and above)

A 3 kWp system attracts €1,600; a 4 kWp or larger system attracts the maximum €1,800.

Eligibility conditions

• Your home must have been built and occupied before 2021.
• The grant is open to all homeowners — it is not restricted to primary residences. If you own a holiday home built before 2021, it may qualify; check directly with SEAI at seai.ie.
• No pre-existing BER is required to apply. A post-works BER is required before SEAI will release the grant payment.
• The installer must be on the SEAI registered companies list at the time the work is carried out. An unregistered installer cannot process any part of the grant on your behalf.
• Solar PV must be a new installation. Replacement of existing panels does not qualify.

How the grant application works

The application sequence matters. You must apply at mgen.seai.ie and receive a Letter of Offer from SEAI before any installation work begins. Starting work before receiving the Letter of Offer disqualifies you from the grant. Once you have the Letter of Offer, your installer completes the work; SEAI then processes payment once the Declaration of Works, Safe Electric certificate, NC6 connection form, and post-works BER are all submitted. SEAI states 4–6 weeks to process payment after all documents are received.

For a complete walkthrough of the application steps, see our full SEAI solar grant guide.

Farm Solar in Roscommon — TAMS III

Roscommon is one of Ireland's most rural counties, with agriculture — particularly cattle and sheep farming — forming a substantial part of the local economy. Many farm holdings here have large shed roofs, grain stores, or outbuildings that are well-suited to solar PV installations larger than what a typical domestic system covers.

Farm solar installations in Ireland are funded separately from the SEAI residential grant. The relevant scheme is the Targeted Agricultural Modernisation Scheme (TAMS III), administered by the Department of Agriculture, Food and the Marine (DAFM) at gov.ie. Key figures for TAMS III solar:

• Grant rate: 60% of eligible costs for all eligible farmers under the Solar Capital Investment Scheme
• Maximum eligible investment ceiling: €90,000 (ring-fenced separately from other TAMS schemes)
• Installed system must meet TAMS technical specifications; check DAFM guidelines before specifying equipment

TAMS and the SEAI residential grant are different schemes for different property types — a farmhouse may be eligible for the SEAI residential grant, while farm outbuildings would fall under TAMS. If you own both a farmhouse and agricultural buildings in Roscommon, it is worth discussing both routes with your installer and confirming which properties qualify under which scheme.

Planning Permission for Solar Panels in Roscommon

Most residential rooftop solar installations in Roscommon do not require planning permission. Under Statutory Instrument 493/2022 (Planning and Development Act 2000 (Exempted Development) (No. 3) Regulations 2022), solar panels on the roof of a house are exempt from planning permission subject to these conditions:

• Panels must not project more than 15 cm above the roof surface
• A 50 cm setback from the roof edge is required
• For detached free-standing installations (not rooftop): maximum 25 m² — rooftop panels on houses have no area cap under SI 493/2022
• Wall-mounted panels are NOT exempt from planning permission

Exceptions apply to protected structures and architectural conservation areas. Ground-mounted systems are subject to separate rules. The planning authority for Roscommon is Roscommon County Council. Your installer will confirm whether your specific property and proposed installation fall within the exemption before work begins.

Selling Excess Solar to the Grid in Roscommon

Once your system is connected and registered under the Microgeneration Support Scheme, your electricity supplier pays you for excess units exported to the grid under the Clean Export Guarantee (CEG). There is no government-mandated minimum export rate — the CRU floor is 0c/kWh and individual suppliers set their own rates. In practice, most major Irish suppliers offer between 10c and 21c/kWh for exported units, but the rate you receive depends on your supplier and tariff.

The first €400 per year of microgeneration income — covering both CEG payments and any other microgeneration income — is exempt from Income Tax, USC, and PRSI under Section 216D of the Taxes Consolidation Act 1997. This exemption was extended to 31 December 2028. Income above €400/year is taxable in the normal way.

You will need a smart meter for export to be measured accurately. ESB Networks handles smart meter installation. Your installer manages the grid connection notification (NC6 form) to ESB Networks as part of the standard installation process. For full regulatory detail, see the Commission for Regulation of Utilities at cru.ie.