Well I have a Voltminder, a Battery Tender, and a 3-Stage Converter. According to the Voltminder, the 3 stages of the converter put out 13.9, 13.6, and 13.2 Volts. These represent boost, saturation, and float. Supposedly the 13.2 float can be left on and not boil out your battery; and that may be true. But instead, when our trailer is parked for extended periods of time, I disconnect the battery and hook up a Battery Tender. I use the Battery Tender on the trailer and both of my tractors (extended sitting and intermittent use). The Battery Tender does an awesome job of maximizing charge without boiling out the battery and has anti-sulfation technology. Float does kick in on my 3-Stage converter as confirmed by the Voltminder. But I prefer to use the Battery Tender.
2012 F150 FX4 Ecoboost, 2016 Surveyor 274BHS
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs