Solar Panel Calculator for Ireland
Rooftop solar pays off in Ireland thanks to an SEAI grant, export payments and high electricity prices. This free solar calculator estimates your system size, payback and savings in euros using local rates and sun hours.
Calculate my solar payback in Ireland →
Solar at a glance in Ireland
Even at Irish sun levels, the SEAI grant, export payments and high tariffs keep payback reasonable.
| Currency | euros (EUR) |
|---|---|
| Typical electricity rate | € 0 per kWh |
| Installed cost | ≈ € 2 per watt |
| Peak sun hours | ≈ 2.6 hours/day |
| Export / buyback | ≈ € 0 per kWh |
Indicative 2026 starting points — every figure is editable in the calculator, and results depend on your own bill, roof and installer quotes.
A typical 4 kW system in Ireland
At around € 2 per watt, a 4 kW rooftop system costs roughly € 6,400 and produces about 2,961 kWh in its first year at Ireland's 2.6 peak sun hours a day. Your real numbers depend on your roof, shading, panel choice and how much power you use during the day — run your own figures in the calculator to see your exact payback, net savings and ROI.
How the solar calculator works
- Your setup. Ireland and euros are pre-selected, with local electricity rate, install cost and sun hours filled in. Enter your monthly bill, or size the system from your appliances.
- Your roof. Search your address or tap “use my location”, then draw your roof on the satellite map — or just type its area. We check the system fits and read local sun hours from NASA data.
- Your results. Instantly see your payback period, net savings, ROI, system size, year-1 production and lifetime CO₂ offset — compare cash vs. a loan, and download a PDF report.
Common questions — solar in Ireland
How many solar panels do I need in Ireland?
It depends on your electricity use, roof space and local sun hours (about 2.6 peak sun hours/day here). A 4 kW system of high-wattage panels is a common starting point for a home — enter your bill or appliances and the calculator gives your exact panel count and system size.
Does Ireland have net metering?
Ireland uses the Clean Export Guarantee (CEG) — your supplier pays you for exported energy at a rate that varies by plan, while self-consumed solar offsets retail price. The calculator models this as buyback.
Are there solar subsidies or incentives in Ireland?
The SEAI solar PV grant offers a cash rebate on eligible residential installs; enter the grant amount or equivalent percentage in the calculator.
How much does a solar system cost in Ireland?
A typical 4 kW system is around € 6,400 at about € 2 per watt installed before the SEAI grant. The calculator prices your own size.
Work out your system size
Not sure how big a system you need? These guides work back from your monthly usage:
500 kWh/month 1,000 kWh/month 1,500 kWh/month 2,000 kWh/month 2,500 kWh/month 3,000 kWh/month
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