MG4 powering other stuff (Vehicle to Load aka ‘V2L’)

wattmatters said:

Our voltage over the last few days:

View attachment 34382

Click to expand...

Have you contacted the energy supplier for an explanation as to why they can not supply the constant 230V AC that you contracted to purchase?
When we were still in Lake Illawarra, the fridgie put a 24 hr power supply and freezer temp recorder on for us after he fitted a new fridge motor. That recorded to wild voltage fluctuations and we submitted it to the energy supplier at the time .... they covered to bill for the fridge motor replacement and credited us for the account payment we had already made for that quarter ...... they must have lit a fire under someone, because three new pole transformers were installed over the next few mths on the main feeder lines ....

T1 Terry

T1 Terry said:

Have you contacted the energy supplier for an explanation as to why they can not supply the constant 230vac you contracted to purchase?

Click to expand...

A few times. I'm at the end of a rural power line. This is normal.

Everest said:

The MG4 V2L only supports 2.2kW at something like 218V AFAIR.

Click to expand...

When using the basic V2L adapter here in Australia that's correct.

But you can get other V2L adapters which enable more power from the on board inverter, which is capable of up to ~ 7 kW.

wattmatters said:

But you can get other V2L adapters which enable more power from the on board inverter, which is capable of up to ~ 7 kW.

Click to expand...

So I read... but I wonder if that could void the warranty as that is outside the specifications.

I assume the Chinese are told every time you discharge, by how much and for how long?

wattmatters said:

When using the basic V2L adapter here in Australia that's correct.

But you can get other V2L adapters which enable more power from the on board inverter, which is capable of up to ~ 7 kW.

Click to expand...

Can I ask a very uniformed question? If the AC inverter is capable of ~7 kW, would that mean that if you had a DC connection the car could supply at the rate it can DC charge?

I think the Sigenergy battery is designed for V2G and comes with a DC connector instead of an AC connector. I know the car isn’t V2G officially, but if it could supply 7 kW that would go a long way towards powering a house I’d imagine.

Everest said:

So I read... but I wonder if that could void the warranty as that is outside the specifications.

I assume the Chinese are told every time you discharge, by how much and for how long?

Click to expand...

I think the Chinese are told every time you joke about Winnie the Pooh or mention Tiananmen Square

ReintjeWA said:

if you had a DC connection the car could supply at the rate it can DC charge?

Click to expand...

I suspect that would depend if the MG4 is equipped with the electronics for V2H/G which would support bi-directional DC. As MG have not said "V2G" ready, like VAG do, then probably unlikely.

ReintjeWA said:

if it could supply 7 kW that would go a long way to powering a house I’d imagine.

Click to expand...

If your house usage is less than about 24kWh a day, then the existing V2L 2kW supply, via inverter's batteries could supply a house - using the inverter / battery to provide the extra peak-power demand. Like @wattmatters does.

ReintjeWA said:

Can I ask a very uniformed question? If the AC inverter is capable of ~7 kW, would that mean that if you had a DC connection the car could supply at the rate it can DC charge?

Click to expand...

That will be up to the BMS.

ReintjeWA said:

I think the Sigenergy battery is designed for V2G and comes with a DC connector instead of an AC connector. I know the car isn’t V2G officially, but if it could supply 7 kW that would go a long way towards powering a house I’d imagine.

Click to expand...

Sigenegy have DC EVSE capable of V2X, but in Australia at least the discharge capability is not as yet enabled. They have two models, 12.5 kW and 25 kW.

Whether the car can participate in V2X is going to be up to MG.

Everest said:

So I read... but I wonder if that could void the warranty as that is outside the specifications.

Click to expand...

Who can know? MG don't list the specifications for their V2L.

All we know is what happens when people connect different V2L adapters.

I'm not advocating it, just mentioning it.

I do think it would be a little more practical for many if a standard V2L adapter could supply ~3.5 kW and MG adjusted the output voltage up a little. Here it would need to be a 15 A socket (different to the standard 10 A sockets).

That said I'm more than happy with the 2.2 kW limit with the standard V2L adapter - as shown previously I use it to charge the home off-grid battery rather than power anything in the home directly.

Bricktop X PWR said:

Using mine now to charge my 500AH battery bank as I'm completely off grid.

Been a game changer over these last two winters.

I use 10% per night.

Click to expand...

Same here. I've used our little petrol generator a few times just to make sure it continues to run, in case, but otherwise the winter deficit has easily been made up by the car.

All I can say is that the eBay adapter plugged into my car boils a 3 kw electric kettle without turning a hair. Once I accidentally ran the inflator pump for my airbed at the same time as the kettle was on and again no hairs were turned.

Someone in the "Camping in the MG4" thread ran a VtL cable from the car into a tent and powered all sorts from it. Including a heater of some sort I believe.

We have a home MicroGrid system which has a 16A Commando Socket input that we can program to pull any power level from any AC source, including EVs with V2L. Details in this post.

As others have suggested, there should be a separate thread for Vehicle to Load (V2L) or V2X V2G and V2H, as they're all related to the same solution.