Fails to charge at 7 kW at home

[Ingo Wilson]

Below is the response from Ohme regarding my failure to charge my LR ZS EV at 7 kW, only accepting 4 kW charging instead.

"I've had a look at your charge history and when checking the OCPP statuses (communication between the car and the charger), I noticed the car appears to have gone into a faulted state called 'SuspendedEV'.
This means that even though Ohme was scheduling and attempting to send out a full charge, the car was limiting what it could accept.
This is something we usually see when there are settings in the vehicle or a third-party app that may be restricting the charge. Do you know of any such settings that might be conflicting with Ohme?
This could include a charging schedule, a charging limit or a deferred charging mode in the vehicle itself or the vehicle's app."

I've looked at both the in-car and app charging options but can't find any reference to change the settings Ohme refer to.

I'd appreciate any advice from members of this forum.



You can check this with your manufacturer directly, who will be able to disable any settings that may be conflicting.

 

[fred12345]

do you have any neighbours that could try charging on your charger and see what happens?
how empty/full is the battery when you charge, at what percentage you normally charge?
Check what happens when you change your battery charging from 80% to 100%.

 

[Ingo Wilson]

do you have any neighbours that could try charging on your charger and see what happens?
how empty/full is the battery when you charge, at what percentage you normally charge?
Check what happens when you change your battery charging from 80% to 100%.

Thanks Fred. I'll get my son in law to hitch his MG5 to my charger and see what charge rate he gets. I normally recharge when level gets near 30%. Obviously that means I can't get anywhere near 90% within my 6 hour 'happy hour' at 4 kW.

 

[Lovemyev]

Is your car only affected by this 4 kW lower rate of charge, when receiving a change from your home wall box ?.
Will the car pull the full 7kW at a public charger or from another wall box at a different location ( friend / work )?.
If so, this pretty much eliminates the suggestion that you may have a problem with the charging system in your car surely ?.
If your wall box was fitted with an amp clamp, it will be constantly monitoring the energy being drawn by other appliance's etc in the home.
If you are charging the car at the same time as using a number of other electrical items in the home, it will throttle back the 7kW the car should be capable of taking.
This is done to safe guard any chance of over loading the main cut out fuse.
A close neighbour has recently had a OHME unit installed to charge this new PHEV.
He is running on a 60 amp main cut out fuse and is on a looped supply.
The wall box installer reduced the wall box output down, to only provide 3.5 kW only.
Of course this is all the PHEV can receive anyway ?.

 

[Ingo Wilson]

Is your car only affected by this 4 kw lower state of charge, when receiving a change from your home wall box ?.
Will the car pull the full 7kw’s at a public charger or from another wall box at a different location ( friend / work )?.
If so, this pretty much eliminates the suggestion that you may have a problem with the charging system in your car surely ?.
If your wall box was fitted with an amp clamp, it will be constantly monitoring the energy being drawn by other appliance's etc in the home.
If you are charging the car at the same time as using a number of other electrical items in the home, it will throttle back the 7kw the car should be capable of taking.
This is done to safe guard any chance of over loading the main cut out fuse.
A close neighbour has recently had a OHME unit installed to charge this new PHEV.
He is running on a 60 Amp main cut out fuse and is on a looped supply.
The wall box installer reduced the wall box output down, to only provide 3.5 Kw’s only.
Of course this is all the PHEV can receive anyway ?.

Wow. Many thanks for your fault finding advice. I'll work my way through this as I'd like to eliminate the possibility that there's an issue with the car as I'm off to Anglesey from Ross on Wye and wouldn't relish only getting 4 kW from fast chargers with a near empty car!

 

[Jomarkh]

Thanks Fred. I'll get my son in law to hitch his MG5 to my charger and see what charge rate he gets. I normally recharge when level gets near 30%. Obviously that means I can't get anywhere near 90% within my 6 hour 'happy hour' at 4 kwh.

Hi, are you on IOG? If you are saying you only use the 6 hour window then you have set IOG up wrong which could be why you are getting a reduced charge rate.

 

[Ingo Wilson]

Hi, are you on IOG? If you are saying you only use the 6 hour window then you have set IOG up wrong which could be why you are getting a reduced charge rate.

Yes. I'm on Intelligent Octopus Go. I haven't set up anything as Ohme have an arrangement with Octopus which set this up for me. Am I missing some intelligence?

 

[Jomarkh]

Can you share a screen shot of you schedule and do you have the price cap enabled?

 

[Lovemyev]

Thanks Fred. I'll get my son in law to hitch his MG5 to my charger and see what charge rate he gets. I normally recharge when level gets near 30%. Obviously that means I can't get anywhere near 90% within my 6 hour 'happy hour' at 4 kwh.

What about trying YOUR car on HIS wall box then, to see if your car will pull close too the 7 kW mark ???.
It’s a process of elimination now I guess ?.
Worth remembering that a type 2 charging cable itself, can have a different rating scale.
Just double check that your untethered cable is the correct rating !.
It is usually printed on the charging sockets ( gun ) at either end of the cable.
The plugs that connects to the car / wall box / public charging post.
If you plug a 3.5 kW rated cable into a 7 kW wall box / post, you will only pull 3.5 kW !.
These 3.5 kW rated cables are usually supplied for use with PHEV’s and not a full BEV - But it’s worth double checking !.
Assume nothing, check everything is my moto ?.

 

[Deleted member 18118]

Unfortunately, I have been through this problem extensively with Ohme technical support and MG. The bad news is that there is no API (Application programming interface) provided by mg for the Ohme charger. Ohme Do publish a list of vehicles that are supported by their charger (In other words that do have an API provided), But MG is not on that list. I have ordered a BMW IX 1 to replace my MG HS phev and I'm assured that the charger will work properly with the new car.

 

[SH58]

Below is the response from Ohme regarding my failure to charge my LR ZS EV at 7 kW, only accepting 4 kW charging instead.

"I've had a look at your charge history and when checking the OCPP statuses (communication between the car and the charger), I noticed the car appears to have gone into a faulted state called 'SuspendedEV'.
This means that even though Ohme was scheduling and attempting to send out a full charge, the car was limiting what it could accept.
This is something we usually see when there are settings in the vehicle or a third-party app that may be restricting the charge. Do you know of any such settings that might be conflicting with Ohme?
This could include a charging schedule, a charging limit or a deferred charging mode in the vehicle itself or the vehicle's app."

I've looked at both the in-car and app charging options but can't find any reference to change the settings Ohme refer to.

I'd appreciate any advice from members of this forum.



You can check this with your manufacturer directly, who will be able to disable any settings that may be conflicting.

I had exactly the same thing with our MG ZS mk1, exactly the same reply ? We’ve also had similar problems when public charging on old Ionity points, just stops for no reason after about 10 minutes or sometimes less. Problems with the vehicle software? ??‍

 

[fred12345]

I had exactly the same thing with our MG ZS mk1, exactly the same reply ? We’ve also had similar problems when public charging on old Ionity points, just stops for no reason after about 10 minutes or sometimes less. Problems with the vehicle software? ??‍

would be good to hear from other ZS owners with Ohme, whether they all have issues ...was wondering whether it's the charger or the car and came across this:

"The first working prototype for the Ohme home charger was produced in 2018 and Octopus was the first supplier with the final production version in 2019 taking advantage of Octopus's Agile overnight tariffs for EV drivers." - by that time ZS Mk1 was already on sale and not necessarily fully compatible with new charger ...

 

[Anon70]

Had an issue with an Ohme not processing input from the CT clamp so it was defaulting to safe charging rate of around 3.6 kW. Sent Ohme pictures of the CT clamp install and they said it all looked good.

They sent out an engineer who checked all connections and swapped out the clamp, still nothing registering. Turned out to be a faulty charging unit (only the 3rd one the engineer had seen with this problem). Engineer swapped out the charging unit and I'm now getting a reading on the Ohme app for the CT clamp and the car charges closer to 6 kW balanced against what is being used in the house.

 

[squirrelz]

If you're on facebook you can try joining this group for help Ohme integration with Intelligent Octopus Go | Facebook

Please read the featured post before you post anything on there, as it answers a lot of common issues, and they can get a bit shirty if you wade in with something that it would have sorted out

 

[Tr380r67]

We had this problem with one of our MG4s. We have two identical MG4 TROPHYs.
As we are also neighbours and have ohme chargers we simply swapped our cars and tried the different chargers. By this we discovered it was one of the cars which had a fault, a common one on the first MG4s, and that being the CCU. This was promptly replaced under warranty and we've had no problems since. ? Your MG dealer should be able to determine if your car has a fault in a few minutes. The part was fitted the next day.

 

[Tr380r67]

Our two MG4s on one drive. You can see the Ohme charger by the front door. The blue one had the new CCU (Combined Charge Unit) fitted.