Degradation rate calculator

Year 1 is not degraded. The annual rate cuts output from year 2. A design aid, not a guarantee.

Year-1 energy (kWh)

Annual rate (%/year)

Method

Years (1 to 40)

Extra first-year loss (%)

Warranty year-1 level (% of nameplate)

Warranty step (%/year from year 2)

-Total energy over the period (kWh)

-Last-year output, % of year 1

-Energy lost vs no degradation (%)

-Total at the warranty floor (kWh)

-Warranty floor in last year, % of year 1

Year	Your path (kWh)	Floor path (kWh)

Floor path = year-1 energy x warranty level for that year / warranty year-1 level. It assumes your year-1 energy equals the warranted year-1 level. Warranty levels are minimums, not forecasts.