Problem with Beta release statistical analysis

There appears to be a problem running statistical analyses on the Beta release.

When treating any derate factor stochastically the system dies with a lengthy and uninformative error message when the sampling algorithm yields a derate greater than 1. For example if modeling the DC wiring loss with the default normal distribution with mean 0.98 and std deviation 0.147 the system tries to run with some samples > 1. This seems to trigger the error.

For derate parameters which should never exceed one, it would be more elegant to reset the parameter to 1 rather than error out.

Actually, as I look at this issue in more detail it is quite a problem for us. We sometimes model variability in irradiance as a stochastic variable within the statistical analysis. That means we need to have parameters on the DC side that can exceed a value of 1.0.

Our preference would be to have no restriction on the numerical value of parameters generated in a statistical analysis, even if that means we occasionally have a "derate" that actually increases power.

Thanks Steve. I'll add this to our Beta feedback list.

We did not limit the value of the "Percent of annual output" variable on the Performance Adjustment page. Maybe for now you could use it for your analysis. (I understand that you originally wanted to do this study on the soiling factor.)

Best regards,
Paul.