Seal V2H/V2G

deed02392 | 2026-01-24 00:18 | 28 views

I know the Seal can do V2L which lets you draw a few kW to a UK socket. But the trial that Octopus/Kraken are doing, with an appropriate charger supporting bi-directional charging, lets you power your home with your Dolphin’s battery. I’m curious how this actually works within the home electrical wiring? I have a Seal and Zaptec Go 2 charger which supports bi-directional charging, and I’m having my home re-wired soon, so I was wondering whether I should prioritise making space for any special appliances that would allow powering my home from the Seal (in case that’s ever supported) or potentially a future BYD model. Does anyone have the low-down on doing V2H with anything other than a Dolphin, and if so what if anything is special about your consumer unit to allow that?

Comments (3)

WinterBarnacles 2026-01-24 02:30

I'll tell you what I know about Japan which charges DC via ChaDeMo and has had V2H systems available for a long time that charge DC power to the car and can also sell surplus power back to the grid. I'm not sure if this will be applicable to the Seal as sold in the UK and as you might connect it to a UK system. It's possible to connect a Seal to V2H systems. People have successfully used it with things like the [Nichicon EV Power Station](https://www.chademo.com/products/v2g/nichicon-ev-power-station) . However they've found that there's a lot of loss of power when discharging back into your home system. Apparently this is related to the fact that the V2H systems expect to be charging a car that handles 400V, but the Seal runs on 800V internally so it has to do a conversion. This makes it kind of impractical to use as a general storage battery to save money, you're better off just selling any surplus power directly to the grid. I've heard there's the same problem with the high-powered Hyundais. It's still potentially useful for dealing with power outages. People also tested the Sealion which came out later and found that the loss of power was much less bad, I'm not sure if it'll improve in future Seals. HTH, YMMV etc

Icefeldt 2026-01-24 11:46

There is a V2H demo video on youtube, where they tested it with a "regular bought" BYD Seal in Australia. https://www.youtube.com/watch?v=2TJt4ZpdOqA

deed02392 2026-01-24 15:46

Thanks bro, yea I’ve seen this, but this is DC V2H/V2G. The trials with Octopus are doing AC with the car’s inverter I believe which means I don’t need a 5 core (with very high gauge copper for DC) connection to the charger.

Add comment