V2L power wash

[wattmatters]

This is the MG4 ChatGPT Tech assist answer to the question:

What is the V2L spec of the MG4?

The MG4 supports V2L (Vehicle-to-Load) functionality, and its presence is recognized in the diagnostic system where the charging connector status can indicate “V2L connection” or “Unknown V2L connection”.

However, specific technical details such as the maximum power output (e.g., kW or amps), connector type, or usage procedures for the V2L feature are not provided in the official MG4 manuals available. For exact V2L specifications, including power ratings and connector standards, it is recommended to consult an MG authorized service center or dealer.

 

[T1 Terry]

I think they are more than likely covering their butt. Say you plug the 7kw V2L into a circuit that is only capable of carrying 2.5kw and a fire results in the death of people ..... the first place they will look is at the vehicle manufacturer that supplied a device that could supply more power than the circuit could handle safely, with no other safety device in the system.

Sure, someone connected the 7kw supply to the 2.5kw circuit, but the claim could be made that the person who made that connection didn't know any better and read that the V2L could power their house in an emergency ........

If the MG device can only provide 2kw, they are safe from prosecution because someone did something stupid, resulting in a dangerous situation developing .......
I've seen more than one suicide plug used to power a house from a power point or inverter ..... (a DIY double ended male plug allowing an extension lead from a generator to be plugged into a household power point to power up the circuit)

It's a bit like having to place a warning on a heater that the surface may be hot, common sense tells us that a heater will be hot, sadly common sense isn't near as common since they stopped the Darwin principle of eliminating those who don't possess any .......

T1 Terry

 

[Everest]

Say you plug the 7kw V2L into a circuit that is only capable of carrying 2.5kw and a fire results in the death of people

That's a different issue though and the circuit that can only handle 2.5kW should be protected with a suitable fuse / MCB.

 

[mg4mc]

Just like any household socket can deliver more than 13 Amps, it is up to the appliance to have appropriate protection (usually a fuse).

 

[gary333]

Maximum continuous safe use of a single 13A socket is usually 10A. Thus it makes sense to say that's the rating if they think people might try using multiple devices daisy chained together.

 

[kiwi]

And when you make a warranty claim on the inverter and MG look at the vehicle log and say it was damaged by overloading with an aftermarket adapter with a 470 ohm resistor in it?

 

[T1 Terry]

And when you make a warranty claim on the inverter and MG look at the vehicle log and say it was damaged by overloading with an aftermarket adapter with a 470 ohm resistor in it?

You question why the self protect function in the MG didn't operate as designed, it will actually derate the output, the same is it can derate the charging, if an over heat is sensed. It is just the 7kw AC charger working in reverse .... something many seem to have difficulty getting heads around, it is no longer a full bridge rectifier that is used to change AC to DC ......

T1 Terry

 

[mg4mc]

Maximum continuous safe use of a single 13A socket is usually 10A. Thus it makes sense to say that's the rating if they think people might try using multiple devices daisy chained together.

Maybe, but you could get a lot more out of one of you tried!

 

[T1 Terry]

No idea how the power system works in the UK, I've watched a few You Tube videos made by people who are called out to sort electrical issues ..... and some of it is down right scary. Apparently, the owner can do DIY wiring on their own house

My question is, if each socket can have a plug with a fuse that can handle 13 amps through it, but 3 such appliances are plugged into the same circuit, what stops the 3 x 13 amp @ 240vac being applied to the circuit? 39 amps x 240v = 9.3kw .....

In Australia, there are no fuses in the plugs, each circuit is protected by a 16 amp breaker, you might get 20 amps or even 25 amps for a very short time, then the breaker trips.

A 15 amp or 32 amp circuit has only the one outlet wired to it, it is marked in the power box as the circuit for that particular purpose and what the max current circuit breaker can be wired into that circuit ........

T1 Terry

 

[Martinonline]

Simply, in the UK the consumer unit contains fuses(old), MCBs (new) and latterly RCDs. DIY can be carried out for simple things, eg replacing a socket, replacing light fittings, adding a radial circuit to a ring main. A DIYer cannot install a new circuit, work on certain cuts, eg for a gas boiler, work in certain areas, eg bathrooms, kitchen, outside. All work must be carried in accordance with Part P of building regulations, which refers eventually to IET wiring documents.

 

[Roger001]

A 32A commando plug-socket supports 7kW supply.

No idea how the power system works in the UK, I've watched a few You Tube videos made by people who are called out to sort electrical issues ..... and some of it is down right scary. Apparently, the owner can do DIY wiring on their own house

My question is, if each socket can have a plug with a fuse that can handle 13 amps through it, but 3 such appliances are plugged into the same circuit, what stops the 3 x 13 amp @ 240vac being applied to the circuit? 39 amps x 240v = 9.3kw .....

In Australia, there are no fuses in the plugs, each circuit is protected by a 16 amp breaker, you might get 20 amps or even 25 amps for a very short time, then the breaker trips.

A 15 amp or 32 amp circuit has only the one outlet wired to it, it is marked in the power box as the circuit for that particular purpose and what the max current circuit breaker can be wired into that circuit ........

T1 Terry

The overall circuit, which is installed as a ring, is protected by a 32A device (fuse, MCB, RCBO, etc) at the fuse box/consumer unit. So the appliance fuse in the plug is there to make sure that the appliance and its cable can not pull more current than the appliance's rating. Otherwise, it could pull up to the 32A limit set in the UK or, in your case, the 16A limit. For a small 3A device, depending on a 32A or 16A breaker is problematic.

What someone can do in a UK home is limited and is being restricted more and more. The problem is that there are still a lot of people doing far more than is allowed. The UK has a lot of very old housing with has been updated many times over. The result, as you can expect, is a real mess at times.

 

[ReintjeWA]

A 15 amp or 32 amp circuit has only the one outlet wired to it, it is marked in the power box as the circuit for that particular purpose and what the max current circuit breaker can be wired into that circuit ........

T1 Terry

Just picking your brain real quick Terry; what if you wanted all the power in a shed to be 15 amp, would you need a circuit for every outlet in the shed?

I remember it being pretty common to pissfart around with your own electricity and plumbing in Europe, not sure about the legality, but the mindset for sure. I think Australia got it right when they allowed people to do simple plumbing themselves now (like changing the kitchen tap), but I also agree we should leave the sparky stuff to the sparkies.

 

[wattmatters]

Say you plug the 7kw V2L into a circuit that is only capable of carrying 2.5kw

A supply only supplies what the load draws.

My 15 kW home is connected to a grid capable of supplying hundreds of kW of power. My home doesn't catch fire or blow up.

 

[T1 Terry]

A supply only supplies what the load draws.

My 15 kW home is connected to a grid capable of supplying hundreds of kW of power. My home doesn't catch fire or blow up.

No it can't, that's what the supply fuse is for, to protect against a dead short that pulls enough current to cause problems on the supply side.

T1 Terry

 

[T1 Terry]

A supply only supplies what the load draws.

My 15 kW home is connected to a grid capable of supplying hundreds of kW of power. My home doesn't catch fire or blow up.

Is more than one 15 amp supply is required on a single circuit, an upgrade from the 2.5mm sq cable to probably the same 5mm sq as I've used for my cable that runs from the V2L to the motorhome, so it can carry the 30 amps if ever required.

T1 Terry