Plane-of-array components and performance ratio

Inputs in W/m2 and degrees. GHI is found as DNI x cos(zenith) + DHI. Preset values are invented.

Preset (invented inputs)

Part A: sky and plane

DNI (W/m2) DHI (W/m2) Zenith angle (deg) Sun azimuth (deg) Tilt (deg from horizontal) Panel azimuth (deg, 180 = south) Albedo (0 to 1) Day of year (1 to 366) Sky diffuse model ASHRAE b for beam IAM (0 to 0.2) Soiling loss (%)

Part B: performance ratio with three denominators

Monthly figures. The defaults are invented.

Array size (kW at STC) AC energy (kWh) POA irradiation (kWh/m2) GHI irradiation (kWh/m2) IAM and soiling loss on POA (%)