Just replaced both batteries on my 270 DA. I can monitor battery voltage on my Garmin Chart Plotter. What should it normally read while under way? It never reads more than 12.6 V. Is that right?
I get from 13.1 to 14 or so on my fish finder readout. I have another voltage monitor below, but ave never checked it underway. The more stuff I have running, the lower the voltage is. My alternator was just rebuilt this year.
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