AKE Posted February 5, 2019 Share Posted February 5, 2019 In 6.78 I encountered a bug in the PVsyst Report when simulating a system with mixed orientationes (e.g east/west). After a little testing, the bug seems to appear only when there are multiple inverters.The losses for- PV loss due to temperature- Module quality loss- LID- Mismatch- Ohmic wiring (DC)are all divided by 2 in the loss diagram, so e.g. Ohmic wiring -0,2%, instead of -0,4%.Another example: LID loss on page 1 (PV array loss factors): -1.0%But LID loss in the loss diagram: -0.5%The resulting energy in MWh however seems to be still correct, so I assume only the displayed numbers for these losses are bugged. Link to comment Share on other sites More sharing options...
André Mermoud Posted February 5, 2019 Share Posted February 5, 2019 You are right. The "Array nominal energy" is indeed a new intermediate calculation (introduced in V 6.77) , which was not correctly calculated for Mixed Orientation in the versions 6.77 and 6.78. This will be corrected in the version 6.79, to be released within about 2 weeks.This only affects the losses expressed as a percentage in the loss diagram (up to EArray at MPP). The simulation results are quite correct.NB: In the meantime If you need a correct report, the can download the version 6.76 from our web site www.pvsyst.com, and install it in parallel with your exiting version. Both versions may by used without interaction. Link to comment Share on other sites More sharing options...
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