Harbor Freight Battery Maintainer Mod
I have a TT that I store at a remote location during the winter and I bring the group 31 AGM battery home with me. I have a charger to ensure that it is at 100% SOC before it gets set in the corner of...
Forum Discussion
There are a bunch of 800ma 15 volt wall warts out there. One 3-amp silicon diode on the positive, another on the negative will drop voltage around 1.5 volts. Rendering a 13.5 final but the 800ma unit will sag to around 13.3 - 13.4
Even unregulated warts can be used if they are 800ma. Silicon or shottky diodes can used to fine tune finishing voltage. Verify voltage after 24 hours.
VRB construction only has problems with thermal runaway if a wattage threshold is breached in combination with excessive internal temperature. I'm afraid 12 watts is far too menial an energy source to provoke catastrophe. By maintaining a finishing float voltage in the 13.2 to 13.5 range
Even unregulated warts can be used if they are 800ma. Silicon or shottky diodes can used to fine tune finishing voltage. Verify voltage after 24 hours.
VRB construction only has problems with thermal runaway if a wattage threshold is breached in combination with excessive internal temperature. I'm afraid 12 watts is far too menial an energy source to provoke catastrophe. By maintaining a finishing float voltage in the 13.2 to 13.5 range
