Charging question.

[TerryNelsen]

Primecom tech is the company that makes the Ford charger.

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[Calvin H-C]

The maximum rate an onboard charger can provide is about 11.5 kW, mainly due to heat dissipation issues. Rectifying AC involves putting the current through two diodes, and that creates about a 1.4 volt drop. Pushing 48 A of current through a 1.4 volt drop means that the rectifier must dissipate 67.2 watts of heat in a fairly small space.

The SR Lightnings have a single charger rated at 11 kW, which is about this limit. ER Lightning use a pair of chargers rated at 9.6 kW (I believe) each, so together they can charge the vehicle at 19.2 kW.

Perhaps someone thought the two chargers on an ER were the same as the one used on the SR and came up with the figure of 22 kW.

It would seem, from a parts inventory point of view, that Ford would just use the same charger for both, but 22 kW exceeds a practical limitation for residential installations. 22 kW would draw about 96 A and that would require a circuit protected with a 120 A breaker. When was the last time you saw one of these available for your home panel?

So, a 100 A breaker protects a circuit for an EVSE that draws 80 A and the total rate for an ER is about 19 kW.

Maybe an ER could actually charge at 22 kW, but you can't try it since the equipment capable of delivering that isn't commercially available.

 

[Zprime29]

Primecom tech is the company that makes the Ford charger.

As far as I know, Seimens makes the Ford Charge Station Pro and the mobile charger is a Webasto product. What is your source for this claim?

 

[TerryNelsen]

Straight from the company. Give them a call.

 

[Zprime29]

Straight from the company. Give them a call.

That's not saying much when they told you inaccurate onboard charger rates. It's well documented who is building the FCSP. You were given bad information.

 

[Amps]

It's all math and well-documented in the truck's specs. Nothing in this thread seems to add up.

https://www.siemens.com/us/en/compa...structure/siemens-collaborates-with-ford.html

 

[TerryNelsen]

It's all math and well-documented in the truck's specs. Nothing in this thread seems to add up.

https://www.siemens.com/us/en/compa...structure/siemens-collaborates-with-ford.html

Do you also think Ford manufacturers all of the parts on your lightning. Call the manufacturer and talk to them.

 

[TerryNelsen]

 

[TerryNelsen]

Read the description 22kw.

 

[TaxmanHog]

Read the description 22kw.

I read the garbage listed as specifications, the assertions are inconsistent with ohms law and what an SR or ER Lightning is capable of charging.

 

[Zprime29]

Just because a DCFC is capable of 350kW, it doesn't mean you can charge at that rate. Your EV has to have the hardware that is compatible of handling it. Call Ford BEV team and ask them if you can charge at 22kW from AC level 2. If the dealer told you that, they are wrong. If the sales person for Primecom told you that, they are wrong. Watch Munroe's video tear down, you can see the actual hardware in the truck. We're trying to educate you since you where given incorrect information.

https://media.ford.com/content/dam/...-lightning/pdf/F-150_Lightning_Tech_Specs.pdf

 

[TerryNelsen]

Thank you.

 

[MickeyAO]

The numbers are very misleading once you understand Ohm's law. Let me step you through it so you can see how they are misleading you.

I've seen a Tesla license plate in the local area show P=I*V

W (Watt also know as Power or P) = I (Amps) * V (Voltage).
Using basic algebra, we can derive the following
V = W / I
I = W / V

22kW = 22000 W

So, if want to do 80 A at 22kW, type into your calculator 22000 / 80 and you will get an answer of 275 V. Most of North America uses 240 V, but I won't say your particular house is not running at a voltage that will harm most of your electronics.

Now let's look at normal voltage and max current 240 V * 80 A = 19,200 W or 19.2 kW.

The BEST I can say about what they put in the description is that the equipment COULD handle up to 275 V, even if basically no one in the world uses that particular voltage.

Now, that doesn't mean if your EVSE (Electric Vehicle Servicing Equipment...what you plug INTO you car) can do 19.2 kW (the most under SAE Level 2 standards) doesn't mean your vehicle can ACCEPT that amount. Your vehicle has an OBC (On Board Charger) that has a maximum that it can accept. A standard range Lightning can accept 48 A (back to Ohms law, 48 A * 240 V = 11.5 kW) and an Extend Range can accept 80 A (240 V * 80 A = 19.2 kW).

One quick thing is not everyone has 240 V! Some facilities, and maybe even houses, use 220 V. Now your equations change downward in the power it delivers.

 

[Pioneer74]

Read the description 22kw.

I know everybody else has been piling on, but I'd like to point out even the description is wrong. You can't get 22kw out of an 80A device at 220V.

220 x 80 = 17.6kw

 

[MickeyAO]

I know everybody else has been piling on, but I'd like to point out even the description is wrong. You can't get 22kw out of an 80A device at 220V.

220 x 80 = 17.6kw

Correct. You would need 275 V to get the 22 kW rate...they may have designed their equipment to HANDLE 275 V, even if it is not offered basically anywhere in the world.

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