V2G to be approved in Australia 2025

gdog · Dec 30, 2024

Everest said:
Not sure I'd agree with that

Oh! That’s that idea blown out of the water

. I’m sure there must be work arounds but the 70% efficiency may be an issue. I estimate my home battery loose about 10% in battery to AC. If the capabilities were built into wall box. But not implemented until usable is what I was suggesting. I recall a podcast with the founder of Octopus that skirted over this subject

wattmatters · Dec 30, 2024

V2G won't be using the car's inverter.

It will need to be an approved inverter designed and approved for grid connection. Early models will be expensive but frankly it shouldn't cost a lot more than a regular hybrid grid-tied inverter which uses 400 V battery architecture and can talk with the car battery's BMS (the same as it would with a regular home battery, or DC charge stations do now).

We will see more integrated solutions with solar PV and home battery, along the lines of what Sigenergy have with their DC charger. That's capable of bidirectional but not approved as yet for reverse flow.

agough · Dec 30, 2024

Coulomb said:
Those aren't useable links; you've copied shortened versions.

Apologies replace ***s with ***********

gdog · Dec 31, 2024

wattmatters said:
V2G won't be using the car's inverter

We'll see. You sound certain do you know something?

Anyway I wouldn't hold my breath if it needs approval before design/manufacture. China would be our one hope of leading the way here as their government are capable of directing manufacture trends

Everest · Dec 31, 2024

Coulomb said:
Those aren't useable links; you've copied shortened versions.

agough said:

Apologies replace ** s with ******

Click to expand...

well that will fix it then !

Everest · Dec 31, 2024

gdog said:
We'll see. You sound certain do you know something?

For the reasons mentioned in my earlier posting I guess - complexity and efficiency.

It can be done using the car's inverter via V2L charging a home battery. That is great for handling power outages or supplementing home usage when the initial cost of the electricity is free (e.g. from solar charging or charging at times when the power company supplies electricity free or very very low cost). But, from what I have read, it is not commercially viable on a greater scale to go from AC -> DC -> AC -> DC -> AC as you only end up with 50% to 70% of the energy back as usable electricity.

Hence the need for bi-directional DC charging at home.

Coulomb · Dec 31, 2024

gdog said:
We'll see [ Re V2G won't use the car's OBC/inverter ]. You sound certain do you know something?

It still means you get to plug something into the car and it powers the house(s), just that the box the cable is connected to is bigger and more expensive than you might be hoping for.

gdog · Dec 31, 2024

I have no idea how it will pan out with VTH or VTG, but hope it will become possible at an affordable cost in not to distant future

decrep · Mar 22, 2025

If the powers that be are smart, they will give good incentives for V2G.
It will help with smoothing the grid.
Excess solar can go to the car when there's oversupply, and add to the grid when there's too much demand.

Mal Sydney · Apr 5, 2025

BeamingJim said:
On the back of some surprisingly progressive news here about the V2G standard to be approved in Australia, what are everyone's thoughts about the future possibilities for the MG4?

Batteries on wheels: Australia to allow vehicle to grid installations by end of year

Bowen says that agreement on new standards means that EV owners will be able to use vehicle to grid technology - effectively using their cars as batteries on wheels - by the end of the year.

thedriven.io

I realise that you can already rig up something similar today using the MG4, V2L and an inverter generator input under some circumstances, but I'm hoping this standard might mean other mainstream options may be released.

The chance of MG releasing any kind of software update to enable for V2G to existing cars is probably zero. But I'm thinking maybe in future a wall charger with V2G compliance could simulate a disconnect and reconnect as V2L to switch the existing connection over from charging to discharging?

Since here in sunny WA, the daytime solar FIT is 2c/kWh (odd how they still charge everyone else over 31c/kWh for usage at the same time of day?), it would be great to be able seamlessly shift that cheap power into the evening.

I met a technical manager for MG on their stand at the Sydney Everything Electric show in March. Apparently V2G is "being looked at"
One issue is the reduced battery life by running it through more cycles; and how that impacts the warranty.

Interestingly I asked an electrician about powering your house during a storm induced blackout. For a fee you can have a 240v adaptor fitted to your incoming wiring / meter box that is powered by a petrol generator. Activating it disconnects the house from the grid and you run modest loads from the generator. But ANY power source can act as petrol generator including my MG4. Maybe $800-$1000.

Tig170 · Apr 5, 2025

Mal Sydney said:
I met a technical manager for MG on their stand at the Sydney Everything Electric show in March. Apparently V2G is "being looked at"
One issue is the reduced battery life by running it through more cycles; and how that impacts the warranty.

Interestingly I asked an electrician about powering your house during a storm induced blackout. For a fee you can have a 240v adaptor fitted to your incoming wiring / meter box that is powered by a petrol generator. Activating it disconnects the house from the grid and you run modest loads from the generator. But ANY power source can act as petrol generator including my MG4. Maybe $800-$1000.

Around the world, most people use a VE Quattro type system.

wattmatters · Apr 5, 2025

Mal Sydney said:
But ANY power source can act as petrol generator including my MG4. Maybe $800-$1000.

It needs to be compatible with the safety systems for the home and the power source.

Plug my generator into the home's power inlet and flip the transfer switch to isolate from the grid, no problems, generator powers the home. Same with an off-grid inverter designed for it.

Try it with the car's V2L though and the car will shut down discharge as it detects an earth current fault.

This can be worked around by a qualified professional but you can't just assume a car's V2L will operate the same as a generator to power a home.

V2G to be approved in Australia 2025

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