DC ground isolation for powering a inverter from an EV

[x2jafa]

I mostly work with EVs... I have a non-drivable EV here with a >100kWh battery, working BMS + charging system, working cooling system, and I can enable the contactors to access the 400V lines.

The problem - EVs test the isolation between the car HV lines and the chassis requiring full isolation. Normal solar inverters connect the -ve (or +ve) to ground and montor for faults.

Thinking either:
A) Looking for recommendations for a grid tie inverter designed to run from 400V battery with DC ground isolation, or
B) Has anyone either modified a solar inverter to work with the DC input isolated from ground?

 

[yabert]

solar inverter to work with the DC input isolated from ground?

Ummm! probably not exactly what you would like to do, but I've used MPPT input of an AIO to connect my EV battery.

 

[x2jafa]

Ummm! probably not exactly what you would like to do, but I've used MPPT input of an AIO to connect my EV battery.

Are you bypassing the car electronics completely? The car shouldn't allow the contactors to engage if connected to a inverter that grounds one side of the DC.

 

[yabert]

Are you bypassing the car electronics completely?

Nop! You know EV software have few glitches
Or in fact, some toleration.
Can you ever imagine that GM didn't put HVIL on some HV connectors or the Bolt EV.

About ground of DC, I bet MPPT input don't have any link with ground.