2004 Optimax 115 for 72 Seafari 20

[McGillicuddy]

That's interesting how efficiently the E-tec winds up especially compared to the Opti, Denny - wonder if it has to do with the power required to run the Opti's injection compressor??? Wish I could find a 4-5 y.o. e-tec for this money...Even my I-6 won't fire with less than 12.3V or so...

Even so if that battery of yours is past 50%, you better hit the retirement plan for a new battery before your next circumnavigation

Ron makes a good point about isolating your starting battery. The Blue Sea Systems is neat (and it sounds like a few of you guys might consider it -this means you Sandman ) in that the switch is "on," "off," or "combine," and when "on," it charges both batteries while you run.

Say battery A is dedicated to starting and battery B is "house battery." They are isolated circuits but in the "on" position, both circuits charge simultaneously while running.
the auto charging relay measures what circuit needs more juice and cuts and distributes it accordingly.

The only time you "combine" the batteries is in the case of emergency starting wherein your starting battery has failed (bad cell, neglect, whatever). Diodes in the ACR and isolation keep bad battery from draining the still good battery. The ACR even measures and detects voltage to keep from overcharging and defers excess charging to the weaker battery. The isolation also eliminates sags and spikes to electrical equipment when starting motor. I love the effective simplicity. Here's the link if you want to check it out. http://bluesea.com/category/2/productline/overview/329