📢 What’s new
The latest release of PVcase Yield introduces a refinement to the Performance Ratio calculation logic.
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Updated Performance Ratio calculation
We have enhanced the Performance Ratio (PR) calculation for bifacial PV systems to improve accuracy. The revised methodology now considers net rear irradiance in the PR denominator, which accounts for ground shading effects caused by the array itself. Previously, the PR calculation used the full, unshaded rear irradiance, with shading losses only reflected as energy flow reductions, resulting in a larger denominator and lower PR values.
With this update, the back irradiance component (G_POA, back) incorporates horizon, terrain, and near shading losses, offering a more precise measure of the effective irradiance reaching the rear of the modules.Â
What to Expect:
- Bifacial projects will now display higher DC and AC Performance Ratio values compared to previous calculations.
- Monofacial projects remain unaffected.
- Energy production metrics (kWh, MWh) are unchanged; only the PR calculation has been updated.
- Existing simulation results are not migrated; the new PR metrics will apply to simulations starting May 7, 2026.
We believe these improvements will greatly enhance your simulation experience and offer more comprehensive options for modeling and analysis.
As always, we're here to help if you have any questions.