Charge calculations NMC

[MattyS]

Hi all, I'm just trying to understand my most recent charge today.

I charged from 25% to 80%, so 55% added. According to MyEnergi app, this was 33.53kw used at the wall which is roughly 55% as expected with a stated SOH at 96% at my last service in December 25 or 61.44kw.

However as far as I know, the car uses 6.6kw per hour because theres 400w losses per hour, meaning my actual charge to the car of 31.6 kw. The car is reporting 80% full as requested but it seems like its short? That kw would suggest my battery would be 57.45kw battery capacity, which is quite worrying for a 3 year old car with just shy of 12000 miles on the odo.

Any ideas for a non mathematician? Am I working this out incorrectly?

Thanks!

 

[siteguru]

Assuming you don't have an early Trophy model with 3-phase charging then your single phase onboard charger is rated to 6.6kW .. in my car the iSmart app generally reports 6.5kW going into the car whilst the Wallbox app reports 7.1kW, so 600W loss, or 91.5% charging efficiency.

On your Trophy the official usable capacity is 61.7kWh .. 55% of that is 33.935kWh. Seems to me that there's nothing to worry about.

 

[MattyS]

Assuming you don't have an early Trophy model with 3-phase charging then your single phase onboard charger is rated to 6.6kW .. in my car the iSmart app generally reports 6.5kW going into the car whilst the Wallbox app reports 7.1kW, so 600W loss, or 91.5% charging efficiency.

On your Trophy the official usable capacity is 61.7kWh .. 55% of that is 33.935kWh. Seems to me that there's nothing to worry about.

Thank you, just wanted to check I wasn't going mad.

Assuming you don't have an early Trophy model with 3-phase charging then your single phase onboard charger is rated to 6.6kW .. in my car the iSmart app generally reports 6.5kW going into the car whilst the Wallbox app reports 7.1kW, so 600W loss, or 91.5% charging efficiency.

On your Trophy the official usable capacity is 61.7kWh .. 55% of that is 33.935kWh. Seems to me that there's nothing to worry about.

see, I did get 55% but only when not taking into account charging losses. Maybe I'm overthinking it

Assuming you don't have an early Trophy model with 3-phase charging then your single phase onboard charger is rated to 6.6kW .. in my car the iSmart app generally reports 6.5kW going into the car whilst the Wallbox app reports 7.1kW, so 600W loss, or 91.5% charging efficiency.

On your Trophy the official usable capacity is 61.7kWh .. 55% of that is 33.935kWh. Seems to me that there's nothing to worry about.

my car is a Dec 22 MY. no t sure on the differences between the 3 and single phase

 

[siteguru]

my car is a Dec 22 MY. no t sure on the differences between the 3 and single phase

Look at your charge port .. if there are metal pins in the L2 and L3 holes then your car (probably) supports 3-phase charging. This means, when using a single phase EVSE (such as almost all of us with home charge points will have) the car binds 2 of the charger phases together - which means that the onboard charger (OBC) is rated at 7kW rather than 6.6kW. Basically the early cars with 3-phase OBCs could charge slightly faster at home.

 

[MickeySw]

my car is a Dec 22 MY. no t sure on the differences between the 3 and single phase

You can check charging losses by comparing your wall box power (energy going into the car) vs iSmart/console values (energy going into the HV battery)?

 

[MattyS]

You can check charging losses by comparing your wall box power (energy going into the car) vs iSmart/console values (energy going into the HV battery)?

It's showing 6.6 on ismart and 7 on the zappi, so assuming I lose 400w per 7kw