Trick the WFCO converter into not entering 14.4v?

Connect a battery. That should keep the voltage above the 13.2v trigger that makes the WFCO go into boost. Then the WFCO will likely refuse to do 14.4 and stay at 13.6 like several others with WFCOs say theirs do. Worth a try.

Now the fans are showing the WFCO less than 13.2v with their load voltage drop. The battery will support the converter in running the loads so not so much drop and stay above 13.2 on starting the loads.