# Posts tagged photovoltaics

## T_cell_typ_avg

This is a short note that derives the “typical average cell temperature” used in the “Weather-Corrected Performance Ratio”. The Weather-Corrected Performance Ratio 1 is defined as:

The denominator is essentially the PVWatts DC model, except the reference cell temperature is not $$T_{\mathrm{STC}}$$ but rather a “typical/average” cell temperature. The report has this to say about that decision: