Fast charging 12v battery through home 7kW. Possible?

[1MGEVUSER]

I had to charge my ICE 12v car battery yesterday. This entailed the use of a long extension lead for my garage to the front of the house, about 20 metres.

Although I am still awaiting for a ZS delivery, I do already have the 7kw home charger installed in the front porch. Is there an adapter of Type 2 to a 13A UK socket that can be bought and to be used safely?

I don't use the car often, so the 12v battery needs topping up once in a while.

I assume this can be also used for the ZS?

 

[pollenface]

I believe the HV battery charges the LV battery as required.

The 7kw charger is basically a fat extension lead. The charger is already built into the car. You will see it when you open the bonnet.

 

[1MGEVUSER]

Are you saying that the 12v battery will never deplete as long the car main battery has a charge in it?

 

[pollenface]

That's what the manual says

 

[1MGEVUSER]

Thank you, in that case I won't be needing to purchase anything for that.

 

[N2STY]

That's what the manual says

Unfortunately the 12v battery only charges in ready mode or if charging HV battery or if you use a remote in app ie cabin heating

 

[1MGEVUSER]

How to best charge the 12 v battery if it needs it? Can I use a normal car battery charger (I don't mean a trickle charger but rather a 10A automatic battery charger). I had to purchase one for my ICE, It did the job in about 3 hours, from 11.4v to 12.8v, including a 7 stages checkup. I was quite impressed with it as in the past I have used a circa 1960s trickle charger that it would take days.

I just hope that I can use it on the EV also when needed.

 

[Coulomb]

How to best charge the 12 v battery if it needs it? Can I use a normal car battery charger

Yes, you can.

If you're on a long road trip, you don't need to worry about charging the 12 V battery. The DC-DC will take care of that.

The MG isn't too bad at keeping the 12 V charged. So I would hold off on an expensive purchase.

 

[N2STY]

How to best charge the 12 v battery if it needs it?

There's nothing special about it it's the same standard 12v battery as your ice car so same charger is fine but remember unlike ice you can charge battery just stick your car in ready mode or just plug the car in as 12v will charge when car is charging at home

 

[1MGEVUSER]

... or just plug the car in as 12v will charge when car is charging at home

Oh, in that case it will be perfect!

 

[hmadsen]

I believe the HV battery charges the LV battery as required.

The 7kw charger is basically a fat extension lead. The charger is already built into the car. You will see it when you open the bonnet.

The "Just an extension cable" is a bit of a simplification.

The charger does pass the AC voltage to the car, but it also contain a "computer" that talks to the car. The car and charger "talk" to eachother and decide what the capabilities of the charger and the the car, are respectively.

It would be easier if you could just get a cable with a TYPE-2 in one end and a CEE plug in the other end, but to prevent melting the cable and so on, the car and charger needs to negotiate charge amps before the car starts charging.

 

[Gandalfharrow]

I had to charge my ICE 12v car battery yesterday. This entailed the use of a long extension lead for my garage to the front of the house, about 20 metres.

Although I am still awaiting for a ZS delivery, I do already have the 7kw home charger installed in the front porch. Is there an adapter of Type 2 to a 13A UK socket that can be bought and to be used safely?

I don't use the car often, so the 12v battery needs topping up once in a while.

I assume this can be also used for the ZS?

You can buy type 2 charger socket to European outlet cable, I bought one by mistake when I thought I was buying a V2L cable. It's quite easy to change the European outlet or use an be adapter to power you battery charger for your ICE car.

 

[1MGEVUSER]

You can buy type 2 charger socket to European outlet cable, I bought one by mistake when I thought I was buying a V2L cable. It's quite easy to change the European outlet or use an be adapter to power you battery charger for your ICE car.

Do you have a link for that?
What about safety?
I think that European voltage is lower than the UK. Monitoring my Easee EV charger, I notice that the voltage varies considerably, 243-250v is showing quite frequently and I believe that these tolerances can be wider. So, it is important to have a safe lead with the correct fuse on it.

 

[Tiny Tim]

Just push start it.... ???

 

[Gandalfharrow]

You can buy type 2 charger socket to European outlet cable, I bought one by mistake when I thought I was buying a V2L cable. It's quite easy to change the European outlet or use an be adapter to power you battery charger for your ICE car.

I will look it up. no voltage is the same, 230v in the UK the tolletence is -10% +20% we used to say 250v!.

 

[hmadsen]

I will look it up. no voltage is the same, 230v in the UK the tolletence is -10% +20% we used to say 250v!.

Yeah i just checked, and the voltage here also fluctuates a bit.

This is the voltage here going back 1 day here.

Low - High is 223 - 239,1

 

[1MGEVUSER]

Yeah i just checked, and the voltage here also fluctuates a bit.

This is the voltage here going back 1 day here.

Low - High is 223 - 239,1

View attachment 14842

That's why it is important to buy a product that it's properly rated for your country.

I had the unfortunate experience of having to replace my TV screen 3 times in less than three years. Thankfully under the warranty. That's 4 screens from new!

I believe (I can't prove it) that there is a high chance that happened because of over voltage.

I wonder how many electrical goods around the world fail because of these voltage variations. The problem is one must rely on the seller's information and there are plenty out there that are either not knowledgeable or simply try to flog us products made for other countries.

 

[hmadsen]

That's why it is important to buy a product that it's properly rated for your country.

I had the unfortunate experience of having to replace my TV screen 3 times in less than three years. Thankfully under the warranty. That's 4 screens from new!

I believe (I can't prove it) that there is a high chance that happened because of over voltage.

I wonder how many electrical goods around the world fail because of these voltage variations. The problem is one must rely on the seller's information and there are plenty out there that are either not knowledgeable or simply try to flog us products made for other countries.

Most products connected to a wall outlet nowadays have a very wide margin when it comes to then voltage.

Anything that contains a switchmode power supply, should ideally be able to do from atleast 100-240 volts. The voltage in is not that important as the first thing that happens is, the voltage gets rectified, chopped up and pushed through a transformer to make the voltage lower.

I would imagine though, that if you raise the voltage above what the power supply is rated for, it could give you problems.

Most products i know of that kind, has a surge protector built in, but they usually short at a voltage above the rated, but if properly made it should "kick in" at a lower voltage than what the power supply can actually handly, otherwise it is kind of worthless

 

[1MGEVUSER]

The thing is, most consumers don't know all these technical information.
We just want to buy a product, plug It in and use it.

 

[pollenface]

The charger does pass the AC voltage to the car, but it also contain a "computer" that talks to the car.

My understanding (as per link below) is that there is just a resistor in the plug head, which tells the car what the cable is rated for or whether it's a V2L cable. No computer in the cable per se.

I guess plug in chargers with adjustable charging power (eg. 6/8/10/15a) would have a little "computer" to change the resistance value between the 2 signal wires.