Version 8: Using Two Orientations vs. One

[JStief]

Hello - We have a simulation with imported topography. To try and minimize the transposition averaging error we created a second variant that groups the tracker tables into two separate orientations, one from 8.7 deg to 1.4 deg axis tilt, and one from 1.3 deg to -6.1 deg axis tilt. Two orientations were made and each has its own subarray. The final energy result of the variant with two orientations seems unaccountably low compared to the original.

The right waterfall is the original, single orientation model. The one on the left is the new, two orientation version described above. I do not understand why the Effective irradiance on collectors to Array nominal energy changed by a much greater percentage (~3.5%) than the corresponding Effective irradiation values (0.4%).

The 9 and 57 inverter groupings belong to Orientation 2 while the 2 and 26 inverter groups belong to Orientation 1. I initially noticed an error in how the strings were split between inverters in the sub-arrays but even after correcting this the above behavior persisted.

Thank you

[dtarin]

Check that bifacial is turned on for both subarrays. Looks like it is not.