Very Inexpensive Battery Maintenance Charger
1.0 ampere output. 13.8 volts regulated charge limit. This unit is good for 100 amp hours worth of batteries. IMO the voltage is a tad high for a high antimony RV battery with temps 60F or higher but ...
Forum Discussion
You can drop output voltage .7 volt with a silicon rectifier. Do you only wish a drop of .4 volts? use a Schottky rectifier. Using parade voltage drops with multiple rectifiers inhibits total current potential so keep this in mind if you are thinking of a three, four or five rectifier voltage dropping system.
