On a 50A charger, it'll hardly notice the drain from a 12V fridge.
Leave the fridge running on the charger all the time....works great.



On 13 Jun 2003 01:44:06 GMT, (Bobsprit) wrote:

Alien has a 12 volt fridge. There is also a 50 amp charging system and 2 group
27 batteries with a third group 27 on a seperate switch in case they fail. The
two mains are isolated.
While underway I've been able to run the 12v with no trouble and everything
stays cold, but there is no A/C mode for the unit when docked. Is the practice
to just shut these down in the slip or run them with the charger on
continously? It would be nice to leave the fridge on for the weekends at least.


Thanks,

Robert B
C&C 32 "Alien"
City Island, NY


Larry W4CSC

"No, NO, Mr Spock! I said beam me down a WRENCH,
not a WENCH! KIRK OUT!"

Most 12 volt boat refrigerators today have Danfoss compressors with
brushless motors inside and an electronic motor control as a separate
unit or Swing compressors which are pulsed on 12 volts by
electronics. Running these units direct from the battery charger
without a battery as a buffer can be a $300 mistake. To learn more
about refrigerators running off battery chargers go to
http://www.kollmann-marine.com and click on BATTERY STRESS.

Richard Kollmann
Author of books on boat refrigeration.