EarthX BatteryEMS contact input

[astirpilot]

I have a EarthX Lithium battery which has an internal Battery Management System. The fault monitoring system lights a LED on the battery if there is a Battery fault. The battery has a sense wire that can attach to a Dynon EMS contact Input to echo the battery LED. The system can be tested by grounding the sense wire, the battery LED and EMS contact widget will light-up.
With Skyview powered-up, this works fine. However when I turn the master off, (avionics off) the LED on the battery turns on and stays on. I must disconnect the battery sense lead from the EMS and then the LED on the battery will go off.
I solved this by inserting a diode in the sense line between the battery and the Dynon Ems (I used a 1N4001 diode). This blocks current from the battery sense from finding ground thru the EMS, but allows the EMS contact to work in the other direction.
I don’t know is this problem is unique to me or if the EarthX setup instructions are wrong, but I thought this might help others having the same problem.

 

[bbtapb]

Thanks. I first hooked up mine the same this evening, and didn't see that. I'll watch for it. Maybe you're a hair under 3.2v?

 

[jnmeade]

I assume that when the SkyView is powered down there is no warning given, is that correct? If that is so, my inclination is to install the discrete EarthX fault LED as a separate lamp on the panel.
My reason for doing so is it seems the EarthX could have a vault when the SkyView is not powered up, such as when charging on the ground or if in the air and one had a reason to power the SkyView down.
Comments? Experience?

 

[Raymo]

Something to consider about EarthX batteries was discovered by a RV owner. He had a faulty alternator that went crazy with over-voltage, which caused the EarthX battery to shutdown (could not absorb the excess load as can other batteries), which resulted in many of his panel gadgets, including Skyviews, to be damaged.

He rightly blamed the faulty, non-aviation type alternator but be aware that an over-voltage situation must be dealt with properly.