Charging MG 4Trophy

[jackhill1]

I have been charging my MG 4 for 6 months without a problem with my Podpoint charger which is 7kW charger, but when I view the charging rate it shows only 5.5 kW. Is this correct.

 

[siteguru]

That seems low ... with my Wallbox it shows 7.2kW most of the time, with 6.4/6.5kW going into the car (on checking the iSmart app).

 

[beavis]

I have been charging my MG 4 for 6 months without a problem with my Podpoint charger which is 7kw charger, but when I view the charging rate it shows only 5.5 kw. Is this correct.

Low voltage during charging?

 

[MG Clive]

The charging rate will also depend on what else you're using at the time, for example if you're cooking, heating, drying etc in the house using electricity, your ev charger will reduce the charging rate to ensure you still have enough power to run your other appliances.

 

[siteguru]

That may depend on whether your charge point has a current clamp input connected to it (to read the current draw by the rest of the loads/circuits in the house) ... mine doesn't so it will try to give up to 32A at all times. I have a 100A incoming fuse though, so the chances of overloading are slim.

 

[MG Clive]

That may depend on whether your charge point has a current clamp input connected to it (to read the current draw by the rest of the loads/circuits in the house)

True, I only had my home charger fitted about a month ago, and the installer said it was required by law, but that could be a new regulation, so maybe not all installations have them fitted.

 

[siteguru]

What rating is your house incoming fuse?

My EVSE was installed around March 2022 - I'm not aware that the regs have changed since then.

 

[jackhill1]

Thank you all who replied

 

[MG Clive]

What rating is your house incoming fuse?

My EVSE was installed around March 2022 - I'm not aware that the regs have changed since then.

Not sure if you're asking me or @jackhill1 here mate, but mine is 60amp.

 

[siteguru]

Not sure if you're asking me or @jackhill1 here mate, but mine is 60amp.

I was replying to you

60A - that's very low for having a 7kW EVSE installed, usually a minimum of 80A is needed. Hence your installation will likely require a current clamp input to restrict charging when the other house load increases.

 

[Slipstream]

I was replying to you

60A - that's very low for having a 7kW EVSE installed, usually a minimum of 80A is needed. Hence your installation will likely require a current clamp input to restrict charging when the other house load increases.

I was told by the installer I needed a 80amp fuse fitted. I had to call western power and distribution to arrange. When the guy came he fitted 100amp.

 

[Coulomb]

When the guy came he fitted 100amp.

I hope that he checked or is somehow aware of the cross sectional area of the cables involved.

 

[siteguru]

You would hope so, if he was the engineering representative of the DNO.

 

[lordsofthewaun]

I was told by the installer I needed a 80amp fuse fitted. I had to call western power and distribution to arrange. When the guy came he fitted 100amp.

That’s what happened with me too. Took about a week for them to do it, but it was free. Great service, considering.

Charged mine last night. This is what I had…

octopus intelligent with a zappi charger

 

[rjhfandclf]

I was told by the installer I needed a 80amp fuse fitted. I had to call western power and distribution to arrange. When the guy came he fitted 100amp.

Your installer was correct; but when I asked UKPN (who have been a brilliantly helpful DNO throughout all our electirical intsallations) to put in a100A fuse they couldn't; but only because the tails to the CU were only 16mm² (not 25mm²) ... but added that there was no way that we would ever need 100A (standard modern 4-bed house usual domestic equipment (no heavy workshop call) with solar, battery, ASHP, and Zappi).

octopus intelligent with a zappi charger

That looks standard to me for a Zappi. But I think you will find that the kW level that reaches the car will be nearer to 6.8 > 6.4kW due to various degredation factors (so I am told).

 

[nexia201]

I have a 7kW charger but only at best manage 6.2kW , most of the time its even down to 5.8 kW. It is dependant on the electricity supply, in my area we don't get the 240 volts but it's 216 volts which when I connect the car will go down to 183 volts .

 

[John1941]

I have been charging my MG 4 for 6 months without a problem with my Podpoint charger which is 7kw charger, but when I view the charging rate it shows only 5.5 kw. Is this correct.

I have been charging my MG4 with Podpoint home charger for a year. I usually get 7kW monitored on my home smart meter monitor.
Main problem I have posted elsewhere is weak & variable WiFi signal at the charge point.
Sometimes works but if not, I use the MG4 in car schedule charging to get the cheap night rate.

 

[Alansurfer]

The cars onboard AC charger will output DC to the battery at max of 6.6kW (20-25 amps) from a 7kW AC supply, nominal will be 6.2kW- this will vary throughout the charge from 0-100% as it’s not linear. The continuous output is usually between 5.4-6.2kW from a 32-40amp 240v AC power supply (the PodPoint wall box is a power supply not a charger). You may see some reduction in colder or hotter weather but it’s usually towards the last part of the charge that you see slowing down and more variable rates.

 

[ianb]

I have an Ohme charger on octopus intelligent tariff. It charges at 7kW all the time, but it’s always at night with no other load on the circuits. When my charger was installed 15m ago I only had a 60A fuse (1938 house). My DNO upgraded this to 100A for free. All new houses have 100A fitted. This should future-proof us for when we stop using gas, and are running a heat pump almost continuously, with perhaps two (or more!) EVs in the house.

 

[siteguru]

FWIW if I monitor a charge using both apps (iSmart and Wallbox) I tend to see a continuous 7.2kW in the Wallbox app and 6.4/6.5kW in the iSmart app ... until SoC reaches a high state of course.