Free tool

Solar PV Payback Calculator

See how quickly solar panels pay for themselves in Ireland, based on live electricity rates.

Your System

System size (kWp)

4 kWp

Installed cost (€, before grant) SEAI grant (€)

Max €1,800. Auto-calculated below.

Annual electricity usage (kWh)

Irish average: ~4,200 kWh/yr

Self-consumption

40%

Typical: 30–50% without battery

Electricity rate (c/kWh)

Current SEAI Band DC: 40.42 c/kWh

CEG export rate (c/kWh)

Electric Ireland CEG: 19.5 c/kWh

Payback period

—

years

Annual benefit

—

savings + export

Annual breakdown

Annual generation —

Self-consumed —

Exported to grid —

Bill savings —

CEG export earnings —

Total annual benefit —

Net cost after grant —

CO₂ saved per year —

SEAI grant: Up to €700/kWp for first 2 kWp, then €200/kWh up to 4 kWp, capped at €1,800. The grant field updates automatically as you change system size.

Calculations assume 950 kWh/kWp/yr (Irish average). Actual generation depends on location, orientation, shading. Rates from SEAI Domestic Fuel Cost Comparison and CEG published rates.