Indicative screening
Solar simple payback calculator
Compare a solar hypothesis with explicit inputs. This tool is not an engineering study, an IRR calculation or a bankability assessment.
All initial values are editable examples, not verified national parameters. Selecting a Gulf country clears country-sensitive fields so they must be filled from a dated local source.
Calculating…
Assumptions and limits
- Country / currency
- France / EUR
- Lifetime
- 25 years
- Specific yield
- 1,450 kWh/kWp/year
- Carbon factor
- 0.35 kgCO₂/kWh · 2026-09-13
The calculation values self-consumed energy at the entered tariff and exported energy at the entered export price. O&M stays constant while production declines with degradation. Tax, financing, inflation, replacement, shading, soiling, grid constraints and storage are not modeled.
View the solar workflow