fredericr

You need to apply soiling on a monthly basis. It is not unusual to have 50% snow losses for peak winter months if you are in a snowy location and if your tilt is low. There are a few studies available online that can help you estimate snow losses but it is very location and system dependent. We operate projects in Canada and Japan and it’s always been a challenge to model snow losses. Thankfully winter months in snowy location are not high production to start with. Check this from NREL https://www.nrel.gov/docs/fy17osti/68705.pdf This from DNV https://solarprofessional.com/modeling-losses-due-to-snowfall

Yes, losses due to snow should be added to the soiling losses.

GlobBak represent the amount of irradiance in W/m2 When you select the variables to be included in your hourly output file check /IncColl/GlobBak or all of them.

Hi PVsyst Support team, There seems to be a bug in V6.78 in System Losses Auxiliaries Tab when clicking the default checkbox to pull the Inverter Auxiliary loss into the System Loss. See below case where I have one inverter with 2 kW loss is power > 287kW The loss is imported as 459586 kW Inverter OND System Loss Tab

1) Pitch in PVsyst is centerline to centerline of the tracker axis. 2) I think tilted axis means the entire axis is tilted ( not the individual modules on the axis) You might want to try the other options with 2 axis.

Your shading scene looks okay, can you share the report for 4m pitch? You should have anywhere from 1.5% to 3% near shading loss (irradiance) depending on your location.