Good morning,
I'm investigating this issue, at first glance it appears that there may be an issue as the total system collector increases far beyond the User-defined collector area. Within the algorithm, the defined system is used to scale the flow rate specified in the user-defined collector. Some of the model equations are becoming undefined for very large system sizes, resulting in unexpected behavior. I will update if a suitable workaround is found.
Is there a target total collector area that you are designing to?
Thanks,
Nick