Your inputs
Editable example valuesYour estimate
Live calculationFinal-year energy
7,093.23 kWh
Lifetime energy
188,447.61 kWh
Retained output
88.67 %
Planning estimates, not equipment approval. Review the assumptions below before choosing a system.
No location or tariff is detected automatically. All results use the values you enter.
What is this tool used for?
Start with first-year generation and an assumed yearly decline. The constant decline is a scenario, not a forecast or a manufacturer's warranty.
How this is calculated
Eᵧ = E₁ × (1 − d/100)^(y − 1); EΣ = Σ Eᵧ; E₁ = First-year energy · kWh; d = Annual generation degradation · %
Before you use the result
Start with first-year generation and an assumed yearly decline. The constant decline is a scenario, not a forecast or a manufacturer's warranty.
Tool guide
Start with first-year generation and an assumed yearly decline. The constant decline is a scenario, not a forecast or a manufacturer's warranty.