View Single Post
Old 08-07-2013, 10:28 PM
PremierPOWER PremierPOWER is offline
TT Newbie
Join Date: Aug 2013
Boat: Lots
Location: Midwest
Posts: 22
It's best to charge a battery isolated otherwise when the first battery in a paralleled set is 100% the charger will go into float mode even if the other is less than 100% (assuming its an automatic smart charger). It would behest to do one battery for starter and 3 for stereo with an isolation switch between parallels. Have two two bank chargers and the switches That way you can break the parallel with the switches in the off position and each battery will have its own bank for charging. This is even more critical if using different brand and age batteries for the paralleled 3 but it would be best to have those 3 all the same battery and same age. Of course your next problem will be ruining a stock alternator
- 1996 Donzi 22 Classic Blackhawk Limited Edition w/ 500hp Mercruiser 502
- 2001 Sea-Ray 240 Sundeck w/ Mercruiser 383
- 2005 Formula 382 FasTECH w/ Twin Mercury Racing HP600SCi
- 2008 Donzi 43 ZR w/ Triple Mercury Racing HP700SCi
- 2009 Meridian 441 Sedan Bridge w/ Twin Mercruiser Cummins 480
- 2014 Regal 27 FasDeck RX w/ Mercruiser 8.2 Mag
- 2016 Nor-Tech 390 CC w/ triple Mercury 350's
Reply With Quote