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Author Topic:   Charging dual batteries
cajunman posted 09-19-2005 09:54 AM ET (US)   Profile for cajunman   Send Email to cajunman  
well i've done a search for old topics on this and can't see, to find my answer exactly. I want to charge my batteries at home just to top em off. Both seem fine,, #1 a little less than # 2.

My question,,,,,,,

I've dual batteries with a perko, 4 position switch. Can i charge both batteries at one by setting to "both", or should i charge one at at time,,(switch to 1 or 2), or do i need to disconnect one of the batteries and charge one at a time?

Greg Hiller posted 09-21-2005 09:58 AM ET (US)     Profile for Greg Hiller  Send Email to Greg Hiller     
Charging one battery at a time is the best. Also, if 2 batteries are very different in there charge, they will equilize their voltage and could draw considerable current between the 2 batteries.
DWS posted 09-30-2005 01:18 AM ET (US)     Profile for DWS  Send Email to DWS     
switch it to position 2 and trickle charge with a 2 amp setting until they are both even or as close as possible to the same charge, I start my boat on 2 and run all my extras on 1, When running you can switch to both and even em up while you are running, Just never put the switch into the off position with the motor running as alternator damage will most likely occur..

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