On-Board Charger brands?

KickinBass23

Cadet
Joined
Feb 28, 2009
Messages
7
Can anyone recommend a good on-board charger. At the moment i've got 2 batteries, but will be installing a 3rd for lights and accessories. I'm looking for a charger that is capable of charging while the motor is running. How well do these usually work? Do they usually just recharge ONE battery? Trolling motor battery? I've got a 75 Merc 650, and from what i believe, has an alternator. Any help is appreciated.
Thanks,
John
 
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