pvdeg.degradation.IwaVantHoff

pvdeg.degradation.IwaVantHoff(weather_df, meta, poa=None, temp=None, Teq=None, p=0.5, Tf=1.41)

IWa : Environment Characterization [W/m²] For one year of degredation the controlled environmnet lamp settings will need to be set to IWa.

Parameters:

• weather_df (pd.dataframe) – Dataframe containing at least dni, dhi, ghi, temperature, wind_speed

• meta (dict) – Location meta-data containing at least latitude, longitude, altitude

• poa (float series or dataframe) – Series or dataframe containing ‘poa_global’, Global Plane of Array Irradiance W/m²

• temp (float series) – Solar module temperature or Cell temperature [°C]

• Teq (series) – VantHoff equivalent temperature [°C]

• p (float) – Fit parameter

• Tf (float) – Multiplier for the increase in degradation for every 10[°C] temperature increase

Returns:

Iwa (float) – Environment Characterization [W/m²[]