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How do the dual OBCs work?

VTbuckeye

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I was bummed when I found out that dual charger did not mean a j1772 plug on each fender. It would have been awesome to plug in to two 30amp EVSEs and charge at 60amp. I got over it a little over 3 years ago.
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Aminorjourney

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If it's anything like the dual on-board chargers I'm fitting to my 2006 Vectrix VX-1, one will be the primary and one will be the slave.

(Bear in mind I'm talking about fitting dual 3.3 kW chargers for a massive 6.6 kW LOL - that said, my bike came with a heady 1.2 kW on board charger lol)
 

tls

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They kind of have to because they need to be at the same voltage or a calculated, precise offset. The easiest way to do this is to have one control the other.
 

chl

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I read somewhere that the SR and Flash have one 11.3kW(?) charger, while the ER has two 9.6kW chargers (for a total of 19.2kw).

All Lightnings have 9 battery modules and the 9 modules all take up the same physical space in the truck.

The configuration chart for the respective batteries:

Ford F-150 Lightning How do the dual OBCs work? ER-SR and Flash battery configurations


They are laid out like this:
Ford F-150 Lightning How do the dual OBCs work? 9 battery modules


This video shows where the SR 11kW charger is located under the floor of the frunk, as well as the DC-DC converter and other things (wiring, etc.):

 
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chl

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PS: the video also mentions that while charging the HV battery, the 12V battery gets charged by the DC-DC converter, as well as while driving.
 

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I recall old discussion that our ER's might have two 40 amp units, but it wasn't fully proven as a fact.

From a manufacturing standardization, I'd suspect the front unit under the frunk is [48 amps @ 240 volts for a theoretical output of 11.6 KW] across the board and the unit at the rear of the truck is [32 amps 7.6 KW] found on 2022 & 2023 ER trucks with dual on board chargers.
 
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chl

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I have seen both 11.3kw and 11.6kw for the SR charger.

A Ford video said 11.3kW - it was talking about the 2024 Lightning Pro as I recall, and about the extended range battery it referred to dual 19.2kW chargers, but I'm sure that meant the total of the two was 19.2kW - previous info I saw or read referred to two 9.6kW chargers in the ER model Lightning.

Yes 11.3kW with 240V would be 47.08A, not 48A but sometimes companies round things off and prefer even numbers. At 48A you'd expect 11.52kW, which I saw somewhere rounded off to 11.6kW.

So it is hard to know for sure the exact numbers.

With losses the effective rate of energy transfer is probably around 90% of the perfect lossless ideal number, I see about 87% to 90% of the energy used is added to my battery most of the time based on the numbers the FCSP and FordPass gives me anyway. I'm sure FordPass rounds the kW added to the battery and percentages off. up or down.

This is the link to the walk around of the 2024 Lightning Pro than mentions the 11.3kW and 19.2kW numbers:



A lot of different things probably went into choosing those chargers, and not using the same chargers for all models - cost, efficiency, heat generation/cooling requirements, availability, and the length of time owners would need to have the vehicles on an EVSE at the various current levels available with Ford branded EVSE's among other things.

Go figure as they say!
 

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@Ford Motor Company any additional feedback from engineering?

From your earlier post, I'd guess all trucks have a 48 amp front board charge controller [OBCC]

Do all Lightnings have a front OBCC that is rated at 48 amps regardless of SR/ER pack sizes for all model years 2022 to present?

Do all Lightnings equipped with dual on board chargers, have a rear unit rated at 32 amps, or do these trucks get something completely different ie. 40 front 40 rear?
 
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Ford Motor Company

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@Ford Motor Company any additional feedback from engineering?

From your earlier post, I'd guess all trucks have a 48 amp front board charge controller [OBCC]

Do all Lightnings have a front OBCC that is rated at 48 amps regardless of SR/ER pack sizes for all model years 2022 to present?

Do all Lightnings equipped with dual on board chargers, have a rear unit rated at 32 amps, or do these trucks get something completely different ie. 40 front 40 rear?
Followed up with them. I'm not *quite* as technical as y'all (I'm getting there) but hoping I can find more on this.
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