r/solarenergy • • 22h ago

PVsyst electrical shading partitions for N-S single-axis trackers with half-cut modules, one 23-module string per table?

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2 Upvotes

Hi all, I’m setting up the electrical shading partitions in PVsyst (v8) for a single-axis tracker project and want to sanity check my approach.

Setup:

  • N-S horizontal single-axis trackers with backtracking
  • Half-cut modules in portrait, [1P / 2P] per tracker
  • String inverters
  • Each tracker table is exactly one 23-module string

What I understand from the PVsyst docs:

  • For regular arrays, modules on the same MPPT input should see the same partial shading, so I shouldn’t split along the tube.
  • For half-cut modules in portrait, the docs say to use partitions at half the module height (the “xT” case, 2x partitions across the table).

What I currently have in the 3D field editor:

  • Nb. rectangles in length (Y): 1
  • Nb. rectangles in width (X): 2

My questions:

  1. For a table that is a single 23-module string, is 1 partition along the tube and 2 across the table (one per half of the half-cut module) the right call?
  2. Should I split along the tube at all, or only if shading varies along the row (hilly terrain, end shading from obstacles)?