MG5 pre-facelift V2L DIY hack?

[mk0805]

Hi,

I was just wondering if anyone can recommend a DIY method to use V2L on a pre-facelift MG5. I found just one post on here about it, but I'm not sure about the details of it, e.g. what kinds of items can be powered that way and also are there any better ways anyone knows of, than using a sine wave inverter?

Thanks.

 

[MickeySw]

As per that post, the simplest way would be to use a 12V DC 1.5kW sine wave inverter and connect it to the Aux battery terminals.

The car needs to be READY before you power an external load as otherwise the 12V battery will deplete rather quickly.

 

[Everest]

What rate does the 12V battery get charged at from the HV battery? 1500W sounds a lot to me - that's 125A at 12V !

 

[mk0805]

As per that post, the simplest way would be to use a 12V DC 1.5kW sine wave inverter and connect it to the Aux battery terminals.

The car needs to be READY before you power an external load as otherwise the 12V battery will deplete rather quickly.

Ok, thanks. However, I've found there are sine wave inverters which can apparently be fitted to any car, so does that mean they can be used to do v2L with any car or is there an advantage to doing it with my EV? Sorry, I'm not very versed in the technicalities of this

 

[Eddie99]

Vehicle to Load (V2L) is not connecting a 12V DC to 230 AC 'Sine wave' converter.

V2L is a plug in to the front where you charge up the car - at the end of the cable is a 13A 3 Pin Socket

I use mine to make tea on a long journey or if we are having a picnic - with a low wattage kettle.

You can purchase a pre-made cable for this - (It's the resistors in the cable that determine if it's a load cable or not)

Here is a video on it - OK it's not an EV5 but same prinicpal



Here is a cable supplier (I'm not related in any way)

MG Vehicle to Load V2L Discharge Cable

A Simple Adapter Power Source (MG Only) PLEASE NOTE: We have received reports that the latest deliveries (06/2023) of MG ZS models have had the V2L functionality disabled or removed. Please confirm with your dealer before purchase. Turn your MG ZS (2022), MG 5 (Facelifted 2023), MG4 (2022), MG...

evcables.com

Here is some more info on this website

Thread 'V2L Cables'

Oct 23, 2022

Hi all just got my zs ev trophy connect a question on V2L cables. Are they just a cable with standard type 2 on one end and 3 pin socket the other?? They look like a costly bit of kit so thinking of buying the components to put one together... any idea in size of cable required?
Would be nice if MG provided one.....

Cheers

• Simon Rogerson
• mg zs ev v2l
• Replies: 26
• Forum: MG ZS EV Forum

 

[EvTek23]

The normal advantage of V2L from an EV is that it has a large capacity 51, 64 or 77 kW/h (MG4) HV battery pack and an onboard inverter. So all you need to supply is a type 2 connector to 13A adaptor cable and set the car into discharge mode.
Using the regular 12v battery will severely limit the time and the loads you can use via an inverter to a few hundred watts as the kW/h rating of the 12v battery is about 0.5Kw/h
Putting the car into ready mode in theory means the 12v battery will be charging, but I'm not sure if the charge via the onboard CCU and HV battery would be enough not to flatten the 12v

 

[kevin ellard]

The normal advantage of V2L from an EV is that it has a large capacity 51, 64 or 77 kW/h (MG4) HV battery pack and an onboard inverter. So all you need to supply is a type 2 connector to 13A adaptor cable and set the car into discharge mode.
Using the regular 12v battery will severely limit the time and the loads you can use via an inverter to a few hundred watts as the kW/h rating of the 12v battery is about 0.5Kw/h
Putting the car into ready mode in theory means the 12v battery will be charging, but I'm not sure if the charge via the onboard CCU and HV battery would be enough not to flatten the 12v

The pre FL MG5 doesn't have any of the hardware required to do proper V2L.
Depending on what you are intending to use it for is perhaps best to get an inverter that you can connect to the 12v battery.
Does anyone know how many watts the DC/DC converter on a pre FL can supply to the 12V circuit?
The one advantage an EV has is that it can be turned on and supplying power silently.

 

[MickeySw]

What rate does the 12V battery get charged at from the HV battery? 1500W sounds a lot to me - that's 125A at 12V !

The CCU is protected by a 150A fuse which will give you on paper about 2000W.

Putting the car into ready mode in theory means the 12v battery will be charging, but I'm not sure if the charge via the onboard CCU and HV battery would be enough not to flatten the 12v

When the car is READY, all low voltage power is supplied by HV battery via the CCU , e.g. there is no load on the 12V aux, hence it cannot be ‘flattened’

Ok, thanks. However, I've found there are sine wave inverters which can apparently be fitted to any car, so does that mean they can be used to do v2L with any car or is there an advantage to doing it with my EV? Sorry, I'm not very versed in the technicalities of this

The alternator on an ICE car has the same functionality as the DC/DC circuit (CCU) in an EV therefore this will work with any car. But as already mentioned, an EV does this silently and without exhaust fumes..