Solar panel installations have surged in Ireland. Falling panel prices combined with SEAI grants and high electricity prices (above 34.38 c/kWh) have pushed payback periods down to 6–8 years for many homes.
Typical installed costs (2026)
| System size | Approx. panels | Installed cost | After SEAI grant |
|---|---|---|---|
| 2.2 kWp | 5–6 | €4,200–5,000 | €2,800–3,600 |
| 3.3 kWp | 8–9 | €6,200–7,000 | €4,600–5,400 |
| 4.4 kWp | 10–12 | €8,300–9,000 | €6,500–7,200 |
| 5.5 kWp | 13–14 | €9,500–11,000 | €7,700–9,200 |
SEAI grant: €1,800 maximum (for 3 kWp+).
Source: SEAI, 12 June 2026What does cost per kWp tell you?
Most solar installers quote in cost per kWp (kilowatt-peak). In Ireland, expect €1,750–2,000/kWp installed for residential systems. Larger systems are slightly cheaper per kWp due to fixed costs being spread.
What affects the price?
Roof type and access: slate roofs or roofs with complex angles add cost. South-facing, unshaded roofs at 30–40° pitch are cheapest to install on.
Scaffolding: required for most two-storey homes. Usually included in quotes but worth confirming.
Inverter type: string inverters are standard and cheapest. Microinverters (one per panel) cost more but improve performance on partially shaded roofs.
Battery storage: adding a 5–10 kWh battery typically costs €3,000–6,000 extra. This is not covered by the solar PV grant (it is a separate product).
Grid connection: your ESB Networks connection fee for export (applying for MRNO) is included in reputable installers’ quotes. Confirm this.
How much energy will my system generate?
In Ireland, a 4.4 kWp system generates approximately 3,800–4,400 kWh per year (roughly 850–1,000 kWh per kWp). South-facing roofs in the southeast produce the most; north-facing or heavily shaded roofs produce significantly less.
A typical 3-bed home consumes 4,000–5,000 kWh per year. A 4.4 kWp system can cover 75–100% of annual electricity needs, though the timing mismatch (solar peaks in summer, demand peaks in winter) means significant export to the grid.
Clean Export Guarantee
Export earnings can significantly improve payback. With Pinergy’s CEG rate of 25.00 c/kWh, a home exporting 1,500 kWh/year earns around €375 per year in export payments.
See solar payback calculator for detailed numbers.
Source: SEAI Domestic Fuel Cost Comparison, 1 April 2026