'No float mode' was definitely not my experience with the WFCO converter in my trailer. I tested the voltage at the battery terminals several times during the winter (when the topic of 'can you leave the batteries on the converter during storage' came up a few times) and it was 13.2V. This was without the disconnect pulled, the propane detector, digital thermostat and radio standby on.
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam