Most Irish homes install a 3–6 kWp solar PV system, which costs €6,500–€12,500 before the SEAI grant. After the grant (up to €1,800), you pay €4,900–€10,700. Solar panel supply and installation also qualifies for 0% VAT (reduced from 13.5% since May 2023), saving several hundred euros more. The average payback period is 7–10 years.
Solar Panel Prices by System Size
The biggest factor in the cost of solar panels is the size of the system, measured in kilowatt-peak (kWp). Here are typical installed costs in Ireland in 2026:
| System Size | No. of Panels | Gross Cost | After SEAI Grant | Est. Annual Saving |
|---|---|---|---|---|
| 2kWp | 4–5 | €4,500–€6,000 | €3,100–€4,600 | ~€500–€700 |
| 3kWp | 6–8 | €6,500–€9,000 | €4,900–€7,400 | ~€650–€900 |
| 4kWp | 8–10 | €8,000–€10,500 | €6,200–€8,700 | ~€900–€1,300 |
| 5kWp | 10–13 | €9,000–€11,500 | €7,200–€9,700 | ~€900–€1,400 |
| 6kWp | 12–15 | €10,000–€12,500 | €8,200–€10,700 | ~€1,400–€2,000+ |
Each system size is costed in full on its own page: 3kW solar system cost in Ireland, 4kW solar system cost in Ireland, 5kW solar system cost in Ireland, and 6kW solar system cost in Ireland.
To run these figures against your own county, roof orientation and household usage — and get a grant amount and payback estimate out the other end — use our solar panel cost calculator.
Prices are indicative averages. Actual costs depend on installer, location, roof type, and specification. SEAI grant for solar PV is capped at €1,800 (€700/kWp for first 2kWp, €200/kWp for 2–4kWp).
As a cross-check on these ranges: SEAI's own data puts the median cost of grant-supported solar PV in January to June 2026 at €9,500 for a semi-detached or end-of-terrace house, €9,250 for a mid-terrace and €11,100 for a detached house, based on what registered installers submitted at grant payment (SEAI, Median costs of individual energy upgrades).
Cost per kWp: What You're Actually Paying
The easiest way to compare quotes is to reduce them to a cost per kWp of capacity. Installers price this way internally, and once you know the number you can tell instantly whether a quote is reasonable regardless of system size. Working back from the installed prices above:
| System Size | Installed Cost (gross) | Cost per kWp |
|---|---|---|
| 2 kWp | €4,500–€6,000 | €2,250–€3,000/kWp |
| 3 kWp | €6,500–€9,000 | €2,170–€3,000/kWp |
| 4 kWp | €8,000–€10,500 | €2,000–€2,630/kWp |
| 5 kWp | €9,000–€11,500 | €1,800–€2,300/kWp |
| 6 kWp | €10,000–€12,500 | €1,670–€2,080/kWp |
For a standard pitched-roof job in the 3–5 kWp range, €2,000–€2,600 per kWp is the normal band. Small systems cost more per kWp because the fixed overheads — scaffolding, inverter, RECI cert, ESB Networks notification — are spread over fewer panels. If a quote lands well above €3,000/kWp for a straightforward roof, get two more before you decide.
Solar Panel Cost by County in Ireland
Panels and inverters cost the same in Donegal as they do in Dublin. What varies by county is installer competition and how much electricity your system actually generates, and both of those affect your real outcome more than the equipment price. We track both through our own network of SEAI-registered installers across all 26 counties.
Installer competition by county
The number of SEAI-registered installers in your area is the biggest single influence on the price you get quoted. More installers means more competition, which pushes quotes toward the lower end of the ranges above. Counties with only a handful of active installers tend to have less price movement and sometimes add a travel element on rural jobs. Here is the coverage we currently see:
| County | SEAI-registered installers (approx.) | Quote competition |
|---|---|---|
| Dublin | 117 | Very high — shop hard, prices vary by 20%+ |
| Cork | 74 | Very high |
| Galway | 50 | High |
| Kildare | 50 | High |
| Meath | 49 | High |
| Mayo | 47 | High |
| Donegal | 37 | Good |
| Tipperary | 35 | Good |
| Wexford | 35 | Good |
| Kerry | 32 | Good |
| Westmeath | 29 | Good |
| Louth | 26 | Moderate |
| Limerick | 23 | Moderate |
| Monaghan | 22 | Moderate |
| Waterford | 22 | Moderate |
| Clare | 18 | Moderate |
| Carlow | 17 | Moderate |
| Cavan | 17 | Moderate |
| Offaly | 16 | Limited — get every available quote |
| Laois | 15 | Limited |
| Kilkenny | 13 | Limited |
| Wicklow | 13 | Limited |
| Sligo | 11 | Limited |
| Roscommon | 9 | Limited |
| Leitrim | 8 | Limited — expect a travel element |
| Longford | 8 | Limited |
Installer counts are from the Solar Quotes Ireland network and move over time as companies register or wind down. They are a guide to competition, not an exact register. In low-coverage counties the fix is simple: cast the net wider and accept quotes from neighbouring-county installers who already travel to your area.
Generation and payback by county
This is the bit most comparison sites skip. The same 4 kWp system on the same roof pitch generates noticeably more electricity on a Waterford or Cork roof than on an Atlantic-facing roof in Mayo or Donegal. The system costs the same in both places, so that gap goes straight to your payback period. Ireland's national average yield is about 884 kWh per kWp per year; the gap between the sunniest and cloudiest counties is roughly 18% (PVGIS / EU Joint Research Centre solar radiation data). County yields below are modelled for a south-facing array at optimal tilt, and the full dataset is on our solar panel output by county page:
| County | Specific Yield (kWh/kWp/yr) | 4 kWp Annual Generation | Est. Payback (4 kWp, post-grant) |
|---|---|---|---|
| Waterford | ~990 | ~3,960 kWh | ~6.5–7.5 yrs |
| Cork | ~970 | ~3,880 kWh | ~6.5–7.5 yrs |
| Limerick | ~930 | ~3,720 kWh | ~7–7.5 yrs |
| Dublin | ~880 | ~3,520 kWh | ~7.5–8.5 yrs |
| Kildare | ~880 | ~3,520 kWh | ~7.5–8.5 yrs |
| Meath | ~875 | ~3,500 kWh | ~7.5–8.5 yrs |
| Galway | ~870 | ~3,480 kWh | ~7.5–8.5 yrs |
| Mayo | ~840 | ~3,360 kWh | ~7.5–9 yrs |
Yields are modelled estimates for a south-facing system at optimal tilt with minimal shading, based on PVGIS regional solar radiation data; actual output depends on roof orientation, pitch, shading and panel specification. Payback assumes the ~€7,450 net cost of a 4 kWp system after the €1,800 SEAI grant and current Irish electricity prices, with a typical mix of self-consumption and microgeneration export. The southeast counties (Waterford, Wexford, Cork) sit at the top; the northwest (Donegal, Leitrim, Mayo) at the lower end. A south-coast home pays back its system roughly a year to 18 months sooner than an identical install in the northwest.
Two households can pay the same €7,450 for a 4 kWp system and get meaningfully different returns. A Waterford home generating around 3,960 kWh a year produces roughly 600 kWh more annually than a Mayo home on 3,360 kWh. At current prices that is worth around €170–€180 a year. Solar pays back in every county; it just pays back a little faster the further southeast you are. See costs and installers for your county →
What Is Included in the Installation Cost?
A full solar PV installation quote from a reputable installer should include:
- Solar panels (modules)
- Inverter (converts DC to AC electricity)
- Mounting frames and fixings
- DC and AC cabling
- Generation meter
- System monitoring (usually app-based)
- Installation labour
- Electrical connection and safety certification (RECI cert)
- SEAI grant application assistance
- DNO (ESB Networks) notification
Some installers quote a lower price that excludes VAT, electrical certs, or DNO connection. Always ask for a fully inclusive quote and check that the installer is SEAI-registered before agreeing to any work.
Battery Storage Cost in Ireland
Adding a battery storage system allows you to store surplus solar electricity for use in the evening, significantly increasing the amount of solar power you can self-consume. SEAI pays a flat €600 grant towards a battery of 5kWh or larger (open since 6 October 2026), and a battery supplied and installed under the same contract as your solar panels is zero-rated for VAT.
| Battery Capacity | Cost (Supplied & Installed) | SEAI Battery Grant |
|---|---|---|
| 5kWh | €1,500–€2,500 with new solar; €2,500–€3,500 as a retrofit | €600 |
| 10kWh | €4,000–€6,000 | €600 |
| 15kWh | €6,500–€9,500 | €600 |
Factors That Affect Solar Panel Prices in Ireland
1. System Size (kWp)
The most significant cost factor. Larger systems cost more but also save more. The cost per kWp generally decreases as system size increases.
2. Panel Quality and Type
Monocrystalline panels are the most efficient and most commonly installed in Ireland. Premium ranges such as Maxeon (formerly sold as SunPower) and REC cost more but carry longer warranties. LG stopped making solar panels in 2022, so treat an "LG" quote today as old stock.
3. Roof Type and Condition
A standard pitched roof with south-facing tiles is the cheapest to work with. Flat roofs, metal roofs, or roof access issues can add €500–€2,000 to the cost. If your roof needs repair before installation, this is an additional cost.
4. Location
Location affects your cost in two ways. On pricing: urban counties like Dublin and Cork have dozens of installers competing, so quotes stay keen; counties with eight or nine active installers may add a small travel charge on rural jobs. On returns: your county determines how much electricity the panels actually produce. A Waterford or Cork roof out-generates a Donegal or Mayo roof by up to 18% on an identical system. See the county generation and payback tables above.
5. Inverter Type
Standard string inverters are cheapest. Microinverters or power optimisers cost more but can improve output on partially shaded roofs.
Solar Panel Payback Period in Ireland
With electricity prices in Ireland averaging over 35c/kWh — among the highest in Europe according to Eurostat — the payback period for solar is:
| System Size | Net Cost After Grant | Annual Saving | Payback Period |
|---|---|---|---|
| 3kWp | ~€6,150 | ~€775 | ~8–10 years |
| 4kWp | ~€7,450 | ~€1,100 | ~7–8 years |
| 5kWp | ~€8,450 | ~€1,150 | ~7–9 years |
After payback, you benefit from essentially free electricity for the remaining lifespan of the panels (typically 25+ years) — though you should budget for one inverter replacement around year 12–15.
0% VAT on Solar Panels in Ireland
Since 1 May 2023, a zero rate of VAT applies to the supply and installation of solar panels on or adjacent to private dwellings in Ireland. Revenue has set no end date for it. Before May 2023 the 13.5% reduced rate applied, which added €1,350 to a €10,000 job. The zero rate needs one business to supply and install the panels under a single contract; panels bought on their own carry 23%.
The SEAI grant of up to €1,800 works differently: it is not automatic. You apply for it yourself on mgen.seai.ie, naming an SEAI-registered company, and you need the Letter of Offer before any work starts.
How to Get the Best Solar Panel Price in Ireland
- Get multiple quotes — Prices can vary by 20–30% between installers. Always get at least 3 quotes.
- Only use SEAI-registered companies — Required to qualify for the grant, and gives you additional consumer protection.
- Compare like for like — Make sure all quotes include the same components (panel brand, inverter, monitoring, certificates).
- Ask about warranties — Good installers offer 25-year panel performance warranties and at least 5-year workmanship warranties.
- Don't choose on price alone — Check reviews, ask for references, and confirm SEAI registration.
Use our free quote service to get a quote from SEAI-registered installers in your county. The form takes about a minute and there is no obligation.
Frequently Asked Questions: Solar Panel Costs in Ireland
A typical residential solar PV system in Ireland costs €6,500–€12,500 installed, or €4,900–€10,700 after the SEAI Solar Electricity Grant of up to €1,800. Most homes install a 3–6 kWp system. Smaller 3 kWp systems start around €6,500; a 6 kWp system with a 5 kWh battery comes to roughly €11,500–€15,000 before grants. Solar PV supplied and installed on a home qualifies for 0% VAT, in place since May 2023 with no end date set. You apply for the grant at mgen.seai.ie before work starts, and SEAI pays it to your bank account, usually 4–6 weeks after the paperwork and post-works BER are in.
A 4 kWp solar PV system in Ireland costs €8,000–€10,500 installed, or €6,200–€8,700 after the SEAI grant of €1,800. A 4 kWp system uses roughly 8–10 panels (typically 440W–500W each) and generates approximately 3,200–3,600 kWh per year — enough to cover a large share of an average Irish home's annual electricity use. The 4 kWp size hits the grant cap exactly: SEAI pays €700/kWp for the first 2 kWp plus €200/kWp for the next 2 kWp (€1,400 + €400 = €1,800). Anything above 4 kWp receives no extra grant.
For most Irish homeowners, yes — payback is typically 7–8 years post-grant on a 4 kWp system, after which the panels produce free electricity for another 15–20+ years. Solar PV in Ireland yields ~800–900 kWh per kWp per year. The case is strongest if you use a lot of daytime electricity (heat pump, EV charger, home office) and have a roof oriented south, southeast, or southwest with minimal shading.
Payback is typically 7–8 years for a 4 kWp residential system in Ireland after the SEAI grant. Households with high daytime electricity use (heat pump, EV charging, home office) see payback closer to 6 years. Households with low daytime use and no battery see closer to 8–10 years. Three things drive the number: your day-vs-night usage split, your microgeneration export rate (from 15.89c at PrepayPower up to 32c in year 1 on SSE Airtricity's Activ8 premium, as of October 2026), and the day-rate you currently pay. Battery storage shortens payback for households that export a lot of cheap solar and pay high import rates.
A 4 kWp solar PV system saves an Irish household roughly €900–€1,400 per year — a combination of imported-electricity offset and microgeneration export income from selling unused electricity back to the grid. The exact figure depends on your supplier's Clean Export Guarantee rate, which ranges from 15.89c/kWh (PrepayPower) to 32c/kWh in year 1 with SSE Airtricity via the Activ8 partnership, restricted to Activ8 install customers; the best rate open to any solar home is 19.5c/kWh from Electric Ireland or SSE Airtricity (rates as of 7 October 2026). The first €400 a year of export income is tax-free under Revenue's microgeneration exemption, which runs to the end of 2028. Budget 2027 announced a rise to €600; Finance Bill 2026 will set the start date.
No — the SEAI grant reduces your net cost by up to €1,800 with no equivalent reduction available outside the scheme. Some installers offer "no-grant" packages priced slightly lower upfront because the grant requires a registered installer plus post-works BER assessment plus portal paperwork, which adds admin cost. But the headline price reduction never matches the €1,800 you would otherwise receive directly to your bank. The only homeowners who realistically skip the grant are those who don't qualify (a home built or first occupied in 2025 or later, a home that already had a solar grant at the same MPRN, or no post-works BER possible), and even then the 0% VAT rate still applies regardless of grant status.
A 4 kWp solar PV system with a 5 kWh battery costs €9,500–€13,000 installed in Ireland, or €7,100–€10,600 after the €1,800 SEAI solar grant and the separate €600 SEAI battery grant (5 kWh or larger, open since 6 October 2026). Adding a 5 kWh battery, the most common residential size, typically costs €1,500–€2,500 when it goes in with the panels; a 10 kWh battery is €4,000–€6,000 installed, and a battery retrofitted later costs more than one fitted with new solar. A battery makes sense if you have a heat pump, EV, or are home during the day; if you are on a premium export rate such as SSE Airtricity's Activ8 offer (32c in year 1), it is harder to justify on payback alone.
The cheapest practical residential solar PV system in Ireland is a 2 kWp install at roughly €4,500–€6,000 before the SEAI grant, or €3,100–€4,600 after the grant of €1,400 (2 kWp × €700/kWp). At 2 kWp you get about 4–5 panels generating 1,600–1,800 kWh/year — enough to cover roughly 35–45% of an average household's electricity bill. Below 2 kWp it's rarely worth the install overhead. Most homeowners install 3–6 kWp because the per-kWp economics improve with system size.
No. The equipment price is the same nationally. Dublin can actually be cheaper to quote because it has the highest installer count in the country (around 117), which keeps competition brisk. Rural counties with only 8–15 active installers (Longford, Leitrim, Sligo, Roscommon) have less price movement and may include a small travel charge on remote jobs. Across the country, a standard 3–5 kWp pitched-roof job typically lands at €2,000–€2,600 per kWp installed. The real county-to-county difference is not price; it is how much electricity a southeast roof generates versus a northwest one on the same system.
The southeast: Waterford, Wexford and Cork. These counties get the most sunshine and the lowest rainfall in Ireland. A south-facing system there yields around 970–990 kWh per kWp per year, against a national average of roughly 884 kWh/kWp and a northwest low of about 817–840 kWh/kWp (PVGIS / EU Joint Research Centre data). On a 4 kWp system costing around €7,450 after the €1,800 SEAI grant, that translates to payback of roughly 6.5–7.5 years in Waterford or Cork versus 7.5–9 years in Mayo or Donegal. Solar pays back in every county; the southeast just gets there a year to 18 months sooner.
It varies a lot. Dublin has around 117 SEAI-registered installers, Cork around 74, and Galway, Kildare, Meath and Mayo each sit in the 47–50 range. At the other end, Longford and Leitrim have about 8 each and Roscommon around 9. If you are in a low-coverage county, the practical move is to widen your search: many installers in neighbouring counties already travel to rural areas and will quote for the work. Get quotes from SEAI-registered installers covering your county here.