pvperfsolar performance modeling

Reference / Rear mismatch

Model option

No rear mismatch

No rear mismatch: the rear irradiance enters the module model whole

Inputs used: Rear mismatch model, Mismatch loss factor (rear side), Bifacial model, Bifaciality factor

Method

No mismatch loss is taken from the rear side's contribution. The bifacial section's rear mismatch loss is not used. PVWatts version 8 passes its rear irradiance to the module model without a mismatch.

The math

Prm=0(1)P_{rm} = 0 \tag{1}

where

Symbol Meaning Unit
PrmP_{rm} the rear mismatch loss of the timestep W

References

  1. NREL SAM Simulation Core (SSC) source code, release 2026.7.3, github.com/NatLabRockies/ssc: ssc/cmod_pvwattsv8.cpp, the representative module's geometry and the rear irradiance in exec() (calc_rear_side(0.013, 1, module.length · nmody), passed to the module model without a mismatch)

API

bifacial.rear_mismatch_model = none

Symbols follow the symbol registry.