PV Degradation Calculator

Estimate solar panel performance decline and lifetime energy production.

System Size (kWp)

Year 1 Production (kWh)

Panel Technology

Custom Degradation Rate (%/year)

First Year Degradation (%) LID: Light Induced Degradation

Analysis Period (years)

Warranty Type

Electricity Rate ($/kWh) For value calculation

Degradation Formula


                        Year 1: P1 = P0 x (1 - LID)

                        Year N: Pn = P1 x (1 - rate)^(n-1)

                        Lifetime = Sum of all years' production

Typical Degradation Rates

Technology	Annual Rate	25yr Retention
N-Type TOPCon	0.25%	~94%
N-Type HJT	0.30%	~93%
Mono PERC	0.40%	~90%
Polycrystalline	0.50%	~88%
Thin Film CdTe	0.60%	~86%

PV Degradation Calculator

Results

Power Retention by Year

Degradation Formula

Typical Degradation Rates