Use van multiplus 2 system in combination with a 3 phase multiplus house system

Modifications
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1

I have a 3 Phase multiplus 2 48/5000 system that has 2 250/85 mppt’s for charging a 32 kWh battery with solar.

The system does run in the summer off-grid and in the winter it is grid connected. It is configured with an ESS assistant and pulls a little power from the grid when connected to prevent back feed to the grid.

I also have a van with an multiplus 2 48/5000 that has its own 16 kWh battery. Normally I charge the van manually when the battery is low from the house system. I do not have configured anything special on this inverter.

Now the van is parked at the house and I would like to use the 16 kWh battery in the house system. Is there a way that I can connect the AC-IN from the van to the house the way I charge the battery now and configure a back feed from the van to the house. The house can be off grid of grid connected depending on the time of the year and solar capacity. The van should always be possible to disconnect from the house system and be used in stand alone mode. I would like to keep een X amount of battery capacity left in the van.

Both systems have their own cerbo GX. The house system has node red installed. I have also a home assistant system that can control parts of these systems. But ideally I would like to let the cerbo’s do its thing.

2

while its possible the danger is having a plug in connection with ess / grid code feed in enabled. this can result in dangerous live pins for some time.

3

If the cable is disconnected there is no power detected then the system is disconnected right? So with the cable disconnected there should be no live pins. Otherwise if the grid fails it also keeps pushing back power to the grid. Or am I mistaking something?

4

ESS is not supported for mobile applications. The cable can be momentarily live during power transitions which is unsafe.

5

Is there an other solution to use the battery? EG4 has a controllable chargeverter. Is there an option that we can use like an controllable battery charger?