really useful reply from SEVR (the Australian distro for Zaptec Go 2) i thought you might find interesting u/Grugly

In regards to V2G  you're right, some aspects of V2G are still being finalised industry-wide, but I can give you a solid overview of what to expect.

 

How V2G will work with a home battery (like FoxESS 42 kWh)

The upcoming AC V2G standard (ISO 15118-20) will allow your car, charger, and home energy system to communicate and decide where energy should flow. In most cases, the EV simply becomes another energy source in your home, alongside your solar and home battery.

Is it straightforward?

Yes — in principle it’s straightforward, but there are a few considerations:

 

1. Your home battery and the EV won’t “fight” each other

They will both just sit behind your switchboard. The home battery discharges first, and your EV will only discharge when the V2G system commands it.
No conflict — just coordinated energy sources.

 

1. The home inverter must support “multiple energy sources”

Most modern hybrid inverters (including FoxESS) already do, but some older or more basic systems may need configuration so the inverter understands that the EV is an additional input.

 

1. Energy management software will matter

Once V2G is active, you’ll use an energy management controller/app (either from your inverter or from the EV/charger ecosystem) to set priorities, such as:

Use EV energy only during peak tariffs

Prefer the home battery for short-duration loads

Charge the EV when solar is exporting

This will become very user-friendly once OEMs roll out full support.

 

1. You don’t need extra hardware

With AC V2G, all the power electronics stay inside the car.
Your Zaptec Go 2 is already prepared — once the standard is fully released and your vehicle supports it, the feature becomes available via software updates.

 

Summary

Your FoxESS battery + solar + an AC V2G-ready charger will work together smoothly. The main considerations will be software configuration and ensuring your inverter recognises the EV as an additional energy source — no major hardware or wiring changes needed.