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I have a Gen 2 tesla Charger with the open source board in it. I am using it with a Vero BMS and their j1772 charge controller.

Since this is my first time using this charger, I set it up as simple as possible. It's in manual mode so once it receives power on the enable pin it should start charging.

My setup is as follows -

1)Charge cable is inserted into the j1772 plug
2) Vero bms outputs positive signal to begin charging
3) this positive signal actives j1772 port (through simp charge) and turns on Tesla charger. Tesla charger has power and enable wired to this positive signal.


I hear the EVSE click, and even see it flashing indicating it is charging. However, there is no amperage coming out of the Tesla charger.

The tesla charger has red lights on all 3 main boards, and everything else seems to be fine.

I will upload my parameters as well as spot values while I am attempting to charge.

Anyone have any ideas as to why its not charging?

I should mention this model is not an A-C model known to not work.

EVsRock wrote: ↑Mon Jul 01, 2024 10:02 am I have a Gen 2 tesla Charger with the open source board in it. I am using it with a Vero BMS and their j1772 charge controller.

Since this is my first time using this charger, I set it up as simple as possible. It's in manual mode so once it receives power on the enable pin it should start charging.

My setup is as follows -

1)Charge cable is inserted into the j1772 plug
2) Vero bms outputs positive signal to begin charging
3) this positive signal actives j1772 port (through simp charge) and turns on Tesla charger. Tesla charger has power and enable wired to this positive signal.

I hear the EVSE click, and even see it flashing indicating it is charging. However, there is no amperage coming out of the Tesla charger.
.....

Maybe you dont connect EVSE PP signal? In general you bring GND to PP signal to activate Gen2 charger. If i remember correctly connecting Enable signals will only light ONE red LED. When you show the charger PP signal it will activate another set of LED and start the process of charging.
Your charger will also require Cp signal to determine the amp limit...

I am not sure if manual charging will work like that...

did you go through the common issues on the wiki? https://openinverter.org/wiki/Tesla_Mod ... N2_Charger

None of your info for the phase modules populate also there seems to be no HV connected to the charger. Please also not HV to the charger and the AC voltage being applied must happen at nearly the same time, within a few seconds or the charger may not work.

tom91 wrote: ↑Mon Jul 01, 2024 12:06 pm did you go through the common issues on the wiki? https://openinverter.org/wiki/Tesla_Mod ... N2_Charger

None of your info for the phase modules populate also there seems to be no HV connected to the charger. Please also not HV to the charger and the AC voltage being applied must happen at nearly the same time, within a few seconds or the charger may not work.

True... i simply leave the charger connected to HV via separate fuse and 25mm2 cable.

tom91 wrote: ↑Mon Jul 01, 2024 12:06 pm did you go through the common issues on the wiki? https://openinverter.org/wiki/Tesla_Mod ... N2_Charger

None of your info for the phase modules populate also there seems to be no HV connected to the charger. Please also not HV to the charger and the AC voltage being applied must happen at nearly the same time, within a few seconds or the charger may not work.

I did go through the common issues. I am certain that its properly grounded, I've checked multiple times.

I have the charger wired to the always hot side of my battery pack. Therefore it should always see the HV battery. If you're saying it doesn't see the battery, does that mean its somehow broken?

Currently, I am using a simp charge to handle the j1772 communication. So the CP and PP pins on the tesla charger are not connected to anything. Do I understand correctly that I should connect the PP line to ground? My Simp bms and Simp charge should handle the current limits with the EVSE.

Please check internal can network is terminated.

With V5aB2, If you do NOT use the external CAN bus or are not properly terminated, remember to close the solder jumper next to R1 under the WiFi module. When in doubt, check the resistance of the CAN bus with all devices off. It should be 60 ohms ideally. If you are not using the external CAN then it should be 120 ohms.

You will most likely still need the 12V enable at pin A3 as per wiki.

EVsRock wrote: ↑Mon Jul 01, 2024 5:42 pm ......

Currently, I am using a simp charge to handle the j1772 communication. So the CP and PP pins on the tesla charger are not connected to anything. Do I understand correctly that I should connect the PP line to ground? My Simp bms and Simp charge should handle the current limits with the EVSE.

You are assuming a lot.
See the wiring here https://openinverter.org/wiki/Tesla_Mod ... N2_Charger

Notice input pins
B1 - 12V power
B7 - GND

B5 - Cp pin - about 25% PWM signal from12V to show 16A request from EVSE you can use 9V signal too
B11 - Proximity (PP) - to GND when active
D1 - Enable - to 12V when active

I never tried to control charger via CAN...

I also suspect a CAN termination issue or bus short circuit as the control board receives absolutely no data from any if the three charge modules. Even if the battery is connected correctly you wouldn't see it because... No data

Ok so it sounds like I need to both terminate the bus (even though I'm not using CAN), and also put the PP pin to ground?

Do I understand that correctly?

First measure with a multimeter the resistance between CAN lines. If much above 120ohms, fix the termination. And yes, PP to ground is also my understanding.