I am curious what others are seeing for voltage of the main battery on the G3X . I have always seen below 12v and figured I just did not have a strong battery. I just changed the battery to a new odessey and I have the same thing. I checked the voltage at the battery and have 12.7 and I have 11.8 on the Efis. A voltage drop should not exist. I am thinking the Efis has to be reading wrong. I plan to check voltage behind the panel this weekend. Once it is charging I have over 14volts on the Efis.