I am working to recreate a PVsyst model for a site and use the model for weather normalization from the site's meteorological data. The original model was done in version 6.43. I am currently running version 6.75. When I get to the waterfall diagram, there are differences in the results for the Effective Irradiance on Collectors which I have not been able to replicate. I have read through the version changes posted in the PVsyst webpage but I cannot identify a change that would explain what I am seeing. Here are the results in 6.75: Input: 1624 kWh/m^2 Global Incident in coll. plane: +25.2% Global incident below threshold: -0.1% Near Shadings: irradiance loss: -3.1% IAM factor on global: -1.3% Soiling loss factor: -1.0% In the version I am trying to replicate from 6.43: Input: 1624 kWh/m^2 Global Incident in coll. plane: +29.4% Global incident below threshold: None stated Near Shadings: irradiance loss: -2.7% IAM factor on global: -1.0% Soiling loss factor: -1.0% Any guidance on why these would be different and how to match the original model would be greatly appreciated.
