Today I wired the Earth-X battery sense wire into the G3X system and configured an alert to trip if the sense wire goes active. The sense wire will go to ground if there’s a fault with the battery management system – if the voltage drops, or if the cells become unbalanced. The alert displays “Main Battery” in red font if there’s an issue.
There GEA-24 supports up to 4 discrete inputs, and they were all already configured (canopy unlatched, stall warning, smoke on, and… something else I forget right now). Since I not installing the stall warning, I decided to repurpose that for the battery alert. I used a spare wire I had run through the firewall and ran it to the GEA-24. The stall warning wire is still there, and I labeled it and insulated the ends. It runs from behind the MFD to the left wing’s small access panel ahead of the main spar.