Replacing Onboard Charger Gen3 2017 MS75D...My Experience (With Photos)

[dbldwn02]

I have an aftermarket charger I took out of my car to switch it to EU car and I've seen quite a few on ebay.

Nice! After market, as in non-tesla branded? Or just used?

 

[Papito]

Orginal Tesla 48A 1P USA spec charger - so yes used from a car with 25 000 km ( around 15 000 miles ). I had to change it to charge at home with 3 Phase system.

 

[dbldwn02]

Orginal Tesla 48A 1P USA spec charger - so yes used from a car with 25 000 km ( around 15 000 miles ). I had to change it to charge at home with 3 Phase system.

400v/3phase? I install electrical all over the world with the military and I much prefer the higher voltage systems. Mostly because they use half the amount of copper which means half the amount of weight for me to lug around.

I wonder why the US charger couldn't accept one leg of EU power and a neutral to make 230v. In the US I can charge on a 3 phase 208 grid (using two hots) or at home at 240 (using two hots) or at home using 120 (using one hot and a neutral). Other than the 50/60Hz frequency, what's the difference of using 2 hots of 230/50hz power?

 

[Papito]

yes 400/3p - do you use an adapter for 3 (two hots) charging in US???

From what I understood USA chargers are single phase with higher input amperage like 48 or 72. EU OCB is 3P but max amperage per phase is 16A. The EU OCB has 3 modules inside.

I might be missing some info on how the car charges in US.

 

[dbldwn02]

Most US Teslas have 2 modules inside. 24amps each to make 48amps. It can send up to 240V/24amps down each board.

Here are combos I've charged on:

120/15A (1 hot)
240/24A (2 hots, with neutral)...this is my daily charging
240/48A (2 hots, no neutral)
240/48A (2 hots, with neutral)
208/48A (1 hot of a 3-phase system)

Other than the 50/60Hz difference, I don't see why a US car couldn't charge on 230 EU. (1 hot, 1 neutral)

 

[Zeeshan Javaid]

Most US Teslas have 2 modules inside. 24amps each to make 48amps. It can send up to 240V/24amps down each board.

Here are combos I've charged on:

120/15A (1 hot)
240/24A (2 hots, with neutral)...this is my daily charging
240/48A (2 hots, no neutral)
240/48A (2 hots, with neutral)
208/48A (1 hot of a 3-phase system)

Other than the 50/60Hz difference, I don't see why a US car couldn't charge on 230 EU. (1 hot, 1 neutral)

Mine has 3 modules as it supports up to 72A

 

[dbldwn02]

Mine has 3 modules as it supports up to 72A

Yup. Makes sense. Those came in the 90s and 100s battery sizes.

What doesn't make sense is why Tesla won't put a 72amp charger in my car. At least when one of the banks craps out, I can still charge at 40-48amps in my garage.