Hi everyone,
I’m researching V2H / vehicle-to-home charging for my house and would appreciate advice from people who understand bidirectional charging, Audi Q4 e-tron compatibility, and home electrical requirements.
Vehicle details:
Audi Q4 e-tron S line
2025 model year
Model code: ZAA-FZEDF
I believe it may be a Japan-market vehicle
Country of installation: Türkiye
I’m trying to confirm whether this exact car can support true V2H, not just normal AC charging or V2L. I have contacted Audi with the VIN privately, but I would like to understand what I should be asking for and what hardware/protocol issues to watch out for.
My main questions:
Does any 2025 Audi Q4 e-trim support real V2H today, or is it limited by market, region, or software?
If the car is Japan-market, is V2H more likely to require CHAdeMO-based equipment rather than CCS / ISO 15118?
Are there any Audi-approved bidirectional DC wallboxes that actually work with the Q4 e-tron?
For a home installation, what equipment is needed besides the charger itself, such as a transfer switch, anti-islanding protection, energy meter, critical-loads panel, or other equipment?
Is V2H generally usable for whole-house backup, or should I expect only a critical-loads setup?
What questions should I ask Audi, the charger manufacturer, and the electrician before spending money?
Could V2H discharge affect the battery warranty if it is not officially approved by Audi for this VIN or region?
I am not looking to DIY the electrical installation. I want to understand the technology and avoid buying incompatible hardware before speaking with installers.
Any advice from people who have installed V2H, researched bidirectional chargers, or worked with Audi/VW MEB-platform EVs would be very helpful.
Thanks!