Tesla gen 3 charger help?

[RobCote]

Maybe I took too big a first bite. I thought I could get the charger working with an Open Inverter control board. Alas, I cannot. I've read so much. Watched videos til my eyes fell out. Experimented. Probed things. Learned a ton.

But the charger doesn't charge. I can't even get it to change behavior. It does the same thing every time. At least it's consistent? I'm not sure where to start (I guess at the beginning?), and I've posted around various subforums hoping to be specific enough as to not be an annoyance. I'll try here as well, I suppose.

I wired the control board to my USA-spec single-phase 48A gen 3 charger from a 2018 Model S. I wasn't super keen on how Damien did it by cutting the header off and wedging in an insulator. Instead, I unsoldered each module board, then unsoldered the headers from the OEM control board. I did miss one connection on each - I think it's a temperature probe? - so those got broken. I haven't been able to get any information on what the component actually is. It's embedded in epoxy. Is this my problem?

Moving on, I put everything back together. I wired up the external side of the control board (the "to vehicle" side) with power, ground, PP, and CP. I also connected USB power, ground, and data wires.

I opened up the battery pack (same 2018 Model S, 75kWh pack) to unplug the contactor solenoid connector from the control board therein. I can put 12V to the contactor leads and they click closed, presenting 298VDC at the pack terminals.

I'm using the original battery connector to attach the charger to the battery pack. I connect that first, then apply 12V to the contactors to connect HV to the charger. Then, I power up the OI control board. At this moment, the charger module boards flash their LEDs once and the Open Inverter control board presents two LEDs, one solid, one flashing. These two stay on (and flashing, respectively). Then, I connect the EVSE (Tesla 120VAC wall plug) to the original charge port (again, same 2018 Model S), which is connected to the charger via the original HV wire harness. PP and CP connector is wired to the OI control board. The WiFi network is established (and reliable).

Then nothing happens. I don't get AC power from the charger. I don't get any lights on the module boards. I don't get any power on the activation terminals for module 1 or 3 (I don't have a module 2, since it's only 48A).

I have a lot of questions. Most importantly, what am I missing? Also, is the firmware already on the board (purchased Gen 3 V3 approx 1 month ago)? Or do I have to do that before anything will happen? If so, how? I've tried connecting with Putty, but I can't establish a connection. I can see parameters at 192.168.4.1 if I'm on the OI network, but if I change anything and then download the parameters, my change doesn't seem to stick. If I change the parameter file and upload it, it doesn't seem to take that way either. What are the parameters? I think I've only found definitions for inverter parameters, not charger stuff. Do I need to connect 12V to IN1? I saw a post regarding the gen 2 charger which mentioned that connection. Do I need to connect USB? Do I need to solder on CAN resistors?

[tom91]

STOP making so many threads with the same questions.

viewtopic.php?p=72528#p72528 asked a question which you did not answer.

viewtopic.php?p=72585#p72585 again provided info which you did not respond to.

[RobCote]

Oh jeez my bad. I didn't see any notifications, so I assumed that there had been no responses. I didn't realize how this forum worked. You have to open each individual thread you've posted in to check if there's been a reply?

Thank you for your replies here and elsewhere! That gives me a bit to go on.

[tom91]

Oh jeez my bad. I didn't see any notifications, so I assumed that there had been no responses. I didn't realize how this forum worked. You have to open each individual thread you've posted in to check if there's been a reply?

Thank you for your replies here and elsewhere! That gives me a bit to go on.

It will show you there are new posts in that section. If you just have one thread it means only one thing to check....

[RobCote]

Understood. It's my mistake. I had notifications turned off (corrected now). I wrongly assumed there had been no responses, so I thought there was no visibility and so I tried a separate subforum. Sometimes certain areas are "dead" whereas other forums are still alive and kicking.