Why did Ford choose 11kW charging for Level 2?

[JohnFoxeSheets]

It's one screen.

I have seen this as 11.5 on the 3 mentioned vehicles. I never have seen this hit higher than 11 for the Mach-E.

The Tesla app has a separate Energy section with a charging session graph. This did have different numbers than the above, so I don't know the difference in measurement/methodology.

As I only have the Mach-E and Equinox charging sessions to compare (don't own the other two anymore), the Equinox numbers on the graph varied from 10.8 to 11.3. The Mach-E hovered at a flat and consistent 10.8.

It occurs to me that the input voltage to your EVSE might be a tab low. Have you tested those vehicles on your EVSE?

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[Clockwork]

It occurs to me that the input voltage to your EVSE might be a tab low. Have you tested those vehicles on your EVSE?

They have all been used on the same one. I charged the Equinox two days ago.

 

[tuminatr]

Except I can monitor via my Wall Connector the kW going in. As stated, one set of vehicles always hit 11.5. The Mach-E never goes beyond 11.

Likely we will never know why Ford chose 11 or why others chose 11.5.

For point of reference you actually need to test those other vehicles and see if they are actually hitting 11.5 they might not. I'd wager you would see the exact same results.

Some of what you see is based on the voltage of your circuit. I obviously don't know yours but I can tell you my 240 volt circuit actually produces 232v at the charger. Not getting full voltage equals you won't get full amperage and I believe this type of a drop is considered acceptable and expected by most electricians

 

[azerik]

Yep. I see ~230v some times of the day and ~210v others as well. (this should yield about a .5kw difference if my math is 1/2 way correct)

 

[tuminatr]

Yep. I see ~230v some times of the day and ~210v others as well. (this should yield about a .5kw difference if my math is 1/2 way correct)

That's odd, and could contribute to the fluctuations you see in charging.

 

[azerik]

It is but it's the entire neighborhood. I worked at a building just 3/4 mile away. My UPS's alerted me all the time. Not only do I have utter crap for power I have 'Fiber" over a coax cable. The lies an stories run deep in my area. Every couple months the transformer explodes over here too. Been here for 14 years. it's nearly clock work.

 

[noway]

In europe the 11kW limit makes sense. 11kW is 3x16A on 230V, half of the maximum of 22kW , 3x32A

What I have noticed is there seems to be a hard limit of 32A (this makes sense since 32A is max current), if only one of the 3 circuits is in use, but when using 2 or 3 circuits there is a hard limit of 16A, even if only using 2 of 3 phases.

It is important to note that it is the current that is lilmited, not the power, so different voltages will give different limits.

 

[Maquis]

In europe the 11kW limit makes sense. 11kW is 3x16A on 230V, half of the maximum of 22kW , 3x32A

Not understanding your math. If you’re calculating 3 phase, the multiplier is not 3, it’s square root of 3.

 

[markboris]

My Mach-E also charges around 11kW, at least that is what the Emporia app shows. It does fluctuate ever so slightly (+- .2kW) but I think it has to do with the solar as that is were the energy is coming from. I took this screenshot a bit ago which is the last 40 min of charging before I disconnected it. Ambient temp is 94˚

 

[noway]

Not understanding your math. If you’re calculating 3 phase, the multiplier is not 3, it’s square root of 3.

If calculating on phase to phase voltage it is square root of 3, but calculating on phase to neutral voltage it is 3x. In europe the phase to phase voltage is around 400V.

3x230Vx16A=11,04kW
Sqrt3x400Vx16A=11,08kW
Difference is because it is not exactly 400V or 230V

 

[Just Lurking]

Some of what you see is based on the voltage of your circuit. I obviously don't know yours but I can tell you my 240 volt circuit actually produces 232v at the charger.

That's interesting. Is that voltage drop under load? I've been working on fixing my electric clothes dryer recently and tested the outlet and power block on the back of the dryer and consistently measured 245V-246V, albeit not under load.

 

[Mach-Lee]

It doesn't make a huge difference and I have no gripes about charge time, but why did Ford choose 11kW for Level 2 charging? This has been our only EV that has this limit.

- 2021 Tesla Model 3 Performance: 11.5 kW
- 2022 Rivian R1T Adventure quad: 11.5 kW
- 2024 Chevy Equinox 3LT eAWD: 11.5 kW

Seems the Mach-E is the odd man out in this scenario. Did it just come down to a cost/benefit analysis on Ford's part? In house or tier 1 supply chain availability?

Yes, I know it is nitpicky to question a .5kW difference, but I am truly curious.

I've seen mine do up to 11.3 kW. Like a lot of other people have said, it does depend on the input line voltage. It also depends on the battery voltage, it will taper down slightly above about 80%. So if you want a proper test drain the battery down to 50% and then charge it when you have 240+ input voltage.

If the charger gets hot (hot garage) it may also throttle back some.

You have a 2024 which has a different charger than <2023.5 so that may also change the behavior slightly.

 

[Maquis]

If calculating on phase to phase voltage it is square root of 3, but calculating on phase to neutral voltage it is 3x. In europe the phase to phase voltage is around 400V.

3x230Vx16A=11,04kW
Sqrt3x400Vx16A=11,08kW
Difference is because it is not exactly 400V or 230V

Correct. I thought you were speaking phase to phase. I should have realized that was not the case.

 

[Triggerhappy007]

It doesn't make a huge difference and I have no gripes about charge time, but why did Ford choose 11kW for Level 2 charging? This has been our only EV that has this limit.

- 2021 Tesla Model 3 Performance: 11.5 kW
- 2022 Rivian R1T Adventure quad: 11.5 kW
- 2024 Chevy Equinox 3LT eAWD: 11.5 kW

Seems the Mach-E is the odd man out in this scenario. Did it just come down to a cost/benefit analysis on Ford's part? In house or tier 1 supply chain availability?

Yes, I know it is nitpicky to question a .5kW difference, but I am truly curious.

At least we didn't get the 7.2 kW charger that Nissan put in the Ariya. That's really slow in 2022 when it was released. What was Nissan thinking?

 

[LF-X]

Single phase charger. Wow - That would suck even more in Germany as we limit single phase loads to 20A. So it would not even get the 7 kW - IT would be 4.6 kW instead. For most people I guess that is fast enough, but 11 kW of the Mach-E is over twice as fast.

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