Calculate guaranteed annual energy production with degradation curve for PPA and performance guarantee contracts.
Input Parameters
Results
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Year 1 Guaranteed
kWh
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Lifetime Guaranteed
MWh
--
Year 25 Guaranteed
kWh
--
Guaranteed Revenue
$
Note: Production guarantees typically cover 90-95% of P50 yield. Degradation of 0.5%/yr is industry standard for crystalline silicon. Shortfall payments are common in PPAs.
Reference
Year N Guaranteed = Year1 × (1−deg)^(N−1) × Guarantee%
Lifetime = Σ Year_N for N=1..Term
Degradation compounds: Year 25 ≈ Year1 × 0.886 at 0.5%/yr
Revenue = Lifetime kWh × Energy Rate