T&T: 24V backup charger...

[Peter Bennett]

Rather than connecting the chargers in series, then charging the
batteries as a series set, I'd just connect one charger to each
battery, so you have two 12 volt chargers charging two 12 volt
batteries - no possibility of unwanted interactions between the
chargers that you might get if you connected them directly in series.


Sunday, April 26, 2009, 5:03:21 AM, Jeffrey wrote:


JS> One of the single-point failure potentials on my boat is the 24 volt  
JS> charger for the bow thruster bank.  I have a single charger with no  
JS> backup.

JS> True to form, the charger stopped working.  I just pulled it out and  
JS> can't find anything serviceable (fuse, breaker, etc).  Hopefully it  
JS> can be fixed.  I can't understand why a replacement costs over $1,000.

JS> Anyway, it got me wondering about a backup 24 volt charger and a way  
JS> for me to charge my bow thruster bank right now.  Here's my question...

JS> I have a couple of those cheap 12 volt car chargers.  You know them -
JS> they're the type that have two big clips on the leads and are used to
JS> charge and/or jump a car.  Could two of those be put in series  
JS> (connect red from one to black of the other) to get a basic backup 24
JS> volt charger?  OK, I know it will output 24 volts for charging but is
JS> it safe to do that for a few hours?


JS> ====================================
JS> Jeffrey Siegel
JS> M/V aCappella

-- 
Peter Bennett, VE7CEI    Vancouver, B.C., Canada
Ennos 31 "Honeycomb"
GPS and NMEA info: http://vancouver-webpages.com/peter 
Vancouver Power Squadron: http://vancouver.powersquadron.ca