Originally Posted by Cha-Ching
Can a battery charger be used to supply power to my black tank's macerating pump by connecting the charger's alligator clips to the pump's alligator clips?
My Sani-Con Tank Buddy RV waste pump only needs to be on approx. 2-5 minutes every week. The Owner's Manual says it requires a 12VDC with a minimum 20AMP dedicated power source so that leaves out using the RV's batteries!
The RV's batteries will supply far more than the requirements of the macerator, and will work just fine.
I don't use my macerator often, but have used an old battery charger to power it a number of times. My charger is only 10 amp rated, but the actual current to the macerator has been less than that.
However, most battery chargers made today have electronic systems that only turn the charge current on when the charger "sees" 12 volts from a battery with the polarity properly connected, so they will not work as a power supply. My charger is old school technology and does not have this problem.
One other thought, if anyone has an old "buzz box" univolt, they make excellent high current battery substitutes. It is about all they are good for, other than a boat anchor.