Bifacial and Floating PV Arrays

People often ask us how they can incorporate additional gains and effects from bifacial and floating PV arrays. At the moment, there is not a validated mathematical model behind how to simulate gains from bifacial modules, or the effects on production for floating PV arrays, but there are ways to consider these effects in your designs in HelioScope.

Change Soiling Losses

The primary way to incorporate gains from bifacial or increased reflected irradiance from a floating PV array is to edit the soiling losses in your Condition Set. For example, If you expected to see a 10% gain in production from these effects, you would change your soiling loss for the year (or for each month if it varies) . Below is an example of how the soiling loss would change from a default value of -2% after being boosted by 10%

  •        Default soiling loss: 2.0%
  •        Soiling with 10% boost: -8.0%

Note: a negative loss will show as a boost in the simulation.

Edit Temperature Coefficients

People can also edit their Condition Set to change the temperature coefficients to change how HelioScope simulates cell temperature for a given ambient temperature and wind speed. HelioScope Condition Sets use default temperature coefficients for standard roof mounted installations, so these can be modified to address irregular installation conditions.