That is correct, sorry didn't mention that. I've only used the charge tank to charge it so far.
I am wondering if your problem is in your charge tank, such as the charger itself.
Unfortunately, I don't know much about that Charge tank as I charge my 2017SR with external chargers (up to ten KW!).
I assume you still have the OBC and the Anderson Connectors above the motor.
But I also assume you don't have a DeltaQ charger or an adapter for the J-1772 to go to the OBC.
You want to get that battery charged back up a bit somehow. That's probably your biggest issue for now. Any other Zero owners around there who could have a DeltaQ Quick charger?
I have all that stuff here, but you're a bit far away.
-Don- Reno, NV