I've had an EarthX ETX680 in my project for many months now. Usually it is on the Optimate charger they recommended. A few months back I unplugged the charger to move some things around. I went to start avionics today and the battery was dead, showing 7v. I charged and it came back to 13.65v but I'm trying to figure out what could be causing this.
This happened over maybe 3-4 months unplugged. The battery is in the plane and everything is wired up but the master is off. There should be nothing draining the battery, and if I put an ammeter in-line with ground I see 0.000A going through it.
What am I missing? Their install doc claims a discharge at ~3%/month so it should not have been a self-discharge problem.
Here is my wiring diagram:
This happened over maybe 3-4 months unplugged. The battery is in the plane and everything is wired up but the master is off. There should be nothing draining the battery, and if I put an ammeter in-line with ground I see 0.000A going through it.
What am I missing? Their install doc claims a discharge at ~3%/month so it should not have been a self-discharge problem.
Here is my wiring diagram:
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