Posts: 410
Location: With my son on the water | I got my answer (see below) from one of the better/best battery/charger sources on this site. [Thanks Al]
No, 13.7VDC will not damage your batteries. That voltage is the typical float voltage for a 12V lead acid battery. However, to use the MK-2-D you need a minimum of a 25A alternator on your main engine. The Minnkota is not really a "Alternator", its a charge regulator that takes the DC output of your main engine alternator and redirects it once the main starting battery reaches 13.7VDC. - meaning its also at a safe level for starting your main engine if needed.
My motor has a 60 amp charger, so I ordered it yesterday for $98 shipped. I will probably have to purchase $20 worth of wire, spare fuses, heat shrink, etc, but I am really excited to see how this works.
The main reason I am getting this is because when we are up on LOTW it never fails the power gets knocked out from some big storm and our batteries are not charged.
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