Start with a written quote for your roof, then separate equipment, access costs and the grant. The budget ranges below are editorial estimates, not a surveyed Irish market average or an official price list. They help you ask better questions; they cannot establish the price for your home.
Price by system size
| System size | Typical before grant | After size-based grant | Good fit for |
|---|---|---|---|
| ~2 kWp | €5,000–€7,000 | €3,600–€5,600 | Small home, lower usage |
| ~3 kWp | €6,500–€8,500 | €4,900–€6,900 | Average usage |
| ~4 kWp | €8,000–€10,000 | €6,200–€8,200 | Average 3–4 bed home |
| 4 kWp + battery | €11,000–€15,000+ | €9,200–€13,200+ | Evening-heavy usage |
What makes the price go up or down
- System size (kWp) — the biggest driver. More panels, more cost, but a better grant (capped at €1,800 from 4 kWp).
- Battery storage — typically adds several thousand euro.
- Roof type and access — flat roofs, slate, or scaffolding-heavy jobs cost more.
- Panel and inverter brand — premium equipment carries a premium price (and often a longer warranty).
What comes off the price
Two things reduce your real cost in Ireland:
- 0% VAT — since 2023, supply and installation of solar panels on homes is zero-rated, so a domestic quote should already be VAT-free.
- SEAI solar grant — up to €1,800, claimed back after the work is completed and signed off. See exactly how it’s structured in our SEAI solar grant guide.
Estimating your payback
A simple way to estimate payback:
Net cost ÷ (yearly bill savings + export income) = payback years
For a 4 kWp system costing ~€7,000 after grant, saving perhaps €700–€1,000 a year in bills and export payments, that’s roughly a 7–10 year payback — faster if electricity prices rise or you use more of your solar directly. We work through whether that’s a good deal in Are solar panels worth it in Ireland?
A quote comparison that catches hidden extras
Consider two fictional proposals for the same equipment. Quote A is €8,200 and excludes €700 scaffolding and a €300 assessment. Quote B is €8,900 with both included. Once scope is aligned, A is €9,200 and B is €8,900. With the same €1,800 grant assumed, their net costs are €7,400 and €7,100. The initially cheaper headline is now the dearer option.
That does not prove B is the better installation. Ask who handles roof damage, which warranty covers labour, whether electrical work is included, and how the production estimate accounts for shading. Use our printable comparison sheet to record the answers.
Why the self-use assumption matters
Suppose a system generates 3,600 kWh each year. If you use 40% directly, 1,440 kWh avoids imports and 2,160 kWh is exported. At hypothetical rates of 30c for imports and 15c for exports, the annual value is €432 + €324 = €756. Set aside €100 for maintenance and the annual benefit is €656.
For a €7,200 net installation cost, that is about 11 years of simple payback. Increasing self-use to 60% gives €764 annual benefit after the same allowance, or about 9.4 years. Those scenarios use the same panels and generation: the difference comes from when the household consumes electricity.
Do not count all generation at the import rate and then add export income. Electricity can be self-consumed or exported, not both. Standing charges, loan interest, replacement equipment and future tariff changes also matter. Use the solar payback calculator to test your quote against different assumptions.
