11kW Charge Rate From Ford 48A EVSE?

[devmach-e]

I see 10.4 on mine when charging at 48 amps.

Is that what you see pulled from the wall, or what Ford Pass reports?

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[jav_eee]

Is that what you see pulled from the wall, or what Ford Pass reports?

Ford pass app info

 

[devmach-e]

Ford pass app info

That's what makes it into the battery. There's about a 10% loss between the wall and the battery due to things like the AC to DC conversion losses, and ancillary loads like cooling for the battery & electronics.

 

[devmach-e]

The charger has configuration setting (DIP switches) to configure the amperage that the car is allowed to draw. Check the book that came with the charger. You can open it and compare to the DIP switches settings to verify that they are set correctly. If it is set to 48 amps ... then your car gets 48 amps X whatever voltage the utility company is supplying.

I saw “whatever voltage” because 240v power is often not precisely 240v. Utility companies can vary … I think it‘s +/- 5%. If it is exactly 240v (I’ve tested mine a few times with my multimeter and it often shows 245v — still within spec.) then you get 11.4 kW that the car will “draw”.

There are also some charging losses (resistance that converts to heat instead of stored energy) … so typically what the FordPass app reports will be a little less than the draw.

The thing on the wall is an EVSE. The actual charger that coverts AC to DC is built into the car. Not all EVSEs have the ability to configure the amperage advertised to the car. The dual-voltage Ford mobile EVSE that comes with the car is fixed at 32A on Level 2 for instance.

When I had my Bolt, which could do a maximum of 7.68 kW, I would see the Bolt throttle the amps because our incoming voltage to the house was 245 to 249 volts (transformer was right across the street and we had solar, so line voltage was always higher). It was an interesting thing to see happen. Still pulled the same ~7.68 kW from the wall.

 

[devmach-e]

The code where I live is a 60 amp breaker should never have more load than 75% of that 60amps.
60amp x 240vac(where I live we are always above 240vac)=14400watts x .75allowed load=10.8kw. 9.8kw after going through wiring losses and charging station losses, I would say is good.

Can you quote the code section that says this? Pretty much everywhere else in the US, the code is that a continuous load has to be on a circuit that is upsized by 25%. I.e a 40A load needs a circuit that is capable of 50A (wiring and breaker). Another way to look at it is that a continuous load cannot be larger than 80% of the circuit, I.e a 40A circuit can only support a 32A load (40 * .8 = 32).

 

[Space_Pony]

This is what mine shows. Autel shows 247.5 volts.

 

[jav_eee]

That's what makes it into the battery. There's about a 10% loss between the wall and the battery due to things like the AC to DC conversion losses, and ancillary loads like cooling for the battery & electronics.

im charging at 40 amps right now. Ford pass says 8.8kW while the vehicle says 39 amps and 9.4kW.

 

[devmach-e]

im charging at 40 amps right now. Ford pass says 8.8kW while the vehicle says 39 amps and 9.4kW.

Do you know what is being drawn from the wall?

 

[Shayne]

Folks:

I’ve been noticing on my new ‘25 GT that I’m only getting ~9.8kW or so charge rate from my Ford EVSE on a 60 amp circuit. Should I be expecting the full 11kW from the EVSE to the onboard charger?

Please advise.

Thanks!

For an understand you can look at the laboratory EPA test attached page 5. This is carried out in ideal conditions and therefore depending on your conditions may vary. Your charger is capable of 48 amp 48 x 0.24 KV = 11.5 KW. 11.5 x 0.87 efficiency is 10.0 KW max into the car. Your 9.8 looks in the ball park. At a stead 9.8 your 10 to 100% time will be 0.9 x 90 KW/ 9.8 = 8.3 hours. It slows down when going from 90 to 100 so a bit longer. If you sleep you should be good.

 

[Space_Pony]

For an understand you can look at the laboratory EPA test attached page 5. This is carried out in ideal conditions and therefore depending on your conditions may vary. Your charger is capable of 48 amp 48 x 0.24 KV = 11.5 KW. 11.5 x 0.87 efficiency is 10.0 KW max into the car. Your 9.8 looks in the ball park. At a stead 9.8 your 10 to 100% time will be 0.9 x 90 KW/ 9.8 = 8.3 hours. It slows down when going from 90 to 100 so a bit longer. If you sleep you should be good.

You stated that the maximum charge rate is 10 kw. That is not what I and many others are seeing. See post #36. My Fordpass app routinely shows 10.5. My window sticker also states that my MME has a "10.5KW AC ONBOARD CHARGER".

 

[Shayne]

You stated that the maximum charge rate is 10 kw. That is not what I and many others are seeing. See post #36. My Fordpass app routinely shows 10.5. My window sticker also states that my MME has a "10.5KW AC ONBOARD CHARGER".

I state based on the EPA efficiency it is. Facts are facts read the testing. That was 2021 88 KW battery I do not think the efficiency has increased too much or your app is at all accurate. It will fluctuate.

Take the percentage charged x 91 KW divide it by time and report back.

Edit: Think the app gives KW now take that and divided by time charging. Ensure you are charging it for a reasonable percentage. If I had 9.8 and not 6.5 I would be laughing.

 

[devmach-e]

For an understand you can look at the laboratory EPA test attached page 5. This is carried out in ideal conditions and therefore depending on your conditions may vary. Your charger is capable of 48 amp 48 x 0.24 KV = 11.5 KW. 11.5 x 0.87 efficiency is 10.0 KW max into the car. Your 9.8 looks in the ball park. At a stead 9.8 your 10 to 100% time will be 0.9 x 90 KW/ 9.8 = 8.3 hours. It slows down when going from 90 to 100 so a bit longer. If you sleep you should be good.

My testing indicates that the efficiency of the internal charger is closer to 93%. This is based on noting the kWh remaining figure reported by Car Scanner prior to charging, charging the car, noting the amount pulled from the wall using something like an Emporia Vue, and looking at the kWh remaining figure after charging. I've done this multiple times. Ancillary loads didn't pull much apparently.

And it absolutely does not slow down between 90% and 100%. It is pretty much the full amount all the way up to about 97% or 98% SOC. Again, tested multiple times.

 

[Shayne]

My testing indicates that the efficiency of the internal charger is closer to 93%. This is based on noting the kWh remaining figure reported by Car Scanner prior to charging, charging the car, noting the amount pulled from the wall using something like an Emporia Vue, and looking at the kWh remaining figure after charging. I've done this multiple times. Ancillary loads didn't pull much apparently.

And it absolutely does not slow down between 90% and 100%. It is pretty much the full amount all the way up to about 97% or 98% SOC. Again, tested multiple times.

To be whining about 9.8 and not 10.5 is ridiculous when some of us can not get over 6.5

 

[jav_eee]

To be whining about 9.8 and not 10.5 is ridiculous when some of us can not get over 6.5

upgrade your stuff

 

[Shayne]

upgrade your stuff

I will when the tech gets to the point it makes sense. It will be with a product that actually has a half decent charging curve, a NACS port and definitely not something with a ford name on it.

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