Jump to content

Bifacial and Monofacial Panels in a same system

Omama Zaheen

Recommended Posts

On a 660kW site, I have used both Bifacial and monofacial solar panels. 44 strings are of bifacial panels and 1 string in a separate MPPT has all monofacial panels. While running Simulation PV syst give the error that "When Defining a bifacial system, you should define a bifacial PV module in each sub-array"
Why is it giving such error? I have used the monofacial panels in a different MPPT

Link to comment
Share on other sites

  • 6 months later...
On 12/11/2023 at 4:30 PM, laurahin said:

What if we edit the PAN file of the monofacial module to indicate that it's bifacial with a bifaciality factor of 0?

Someone reported a difference on the forums . I would run a test, find the delta, then apply in MQF or post-process. 


Link to comment
Share on other sites

You can define a PV module by activating the Bi-facial feature, and specify a bifacial factor = 0.

There is indeed a difference when simulating with the bifacial model (and Bifacial factor = 0) and without.

The bifacial calculation  includes a contribution for the reflexion of the near ground in front of the PV modules (named "Ground reflexion on front side" on the loss diagram). This uses the whole "mechanics" of the 2D bifacial model.

This contribution cannot be calculated in a simple way.  It depends on several parameters like the ground albedo, the height above the ground, the pitch, etc.  It is neglected in the usual monofacial simulations.



Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...