Solar ROI Calculator
Use our interactive tool to estimate your potential savings, payback period, and long-term return on investment for a solar PV system. Adjust the sliders to match your needs.
Total DC capacity of your solar panels.
10 kWpMaximum AC power output of the inverter.
5 kWMaximum power allowed to be exported to the grid (set to 0 for no export).
5 kWTotal installed cost of the entire system.
€10,000Your total yearly electricity consumption from bills.
4,200 kWhSelect a profile to set a typical daytime usage value below.
Percentage of solar energy used instantly as it's generated.
40%Battery capacity for energy storage.
0 kWh€200/kWh
€0.32/kWh
€0.10/kWh
€0.18/kWh
Average in Ireland is ≈960 kWh/kWp.
960 kWh/kWpPayback Period
8.5 years
Annual ROI
11.8%
25-Year Savings
€54,320
Detailed Analysis
Total Investment:€10,000
Potential DC Generation:9,600 kWh
Actual AC Generation (after Inverter):4,800 kWh
Annual Self-Use:4,200 kWh
Annual Export:0 kWh
Calculated Self-Consumption:88%
Clipped Energy (Lost):0 kWh
Self-Use Savings:€1,344/year
Export Income:€0/year
EV/Night Savings (Arbitrage Profit):€0/year
Total Annual Benefit:€1,344/year