Irish Solar PV & Battery Payback Calculator
Model exact county solar irradiance, the official SEAI €2,100 grant, Clean Export Guarantee (CEG) income, and winter night-boost battery arbitrage for Republic of Ireland homes.
Annual Yield: 975 kWh/kWp (Leinster)
Orientation derate applied to Met Éireann annual generation model.
10-Year Cumulative Cashflow & Net Return
Frequently Asked Questions: Solar & Batteries in Ireland
How much is the SEAI solar grant in Ireland for 2026?
The 2026 SEAI Domestic Solar PV grant provides €800 per kWp for the first 2.0 kWp installed, plus €250 per kWp for systems between 2.0 kWp and 4.0 kWp, reaching a maximum grant cap of €2,100 for systems of 4.0 kWp and larger.
What is the Clean Export Guarantee (CEG) in Ireland?
The Clean Export Guarantee (CEG) is Ireland's statutory feed-in tariff. Electricity suppliers pay residential solar owners between 15.0c and 20.0c per kWh for surplus solar power exported back to the ESB Networks national grid.
How does winter smart-tariff night-boost battery arbitrage work?
During overcast Irish winter months (mid-October to mid-March) when solar production is minimal, homeowners charge their home battery from the grid during the 2:00 AM – 5:00 AM cheap night boost window (approx. 8.1c – 9.4c/kWh). The stored energy is discharged to power the home during peak daytime hours, saving €350 to €750 annually.
Which Irish county has the best solar irradiance?
According to Met Éireann and PVGIS solar data, County Wexford receives the highest solar irradiance in Ireland with approximately 1,045 kWh per kWp annually, closely followed by Waterford (1,030 kWh/kWp) and Cork (1,015 kWh/kWp).