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I recently installed my Open EVSE and have yet to successfully charge my 2024 Toyota Rav4 Prime. It's on a 50amp breaker and as far as I can tell my vehicle's charger can run a maximum of 32amps.

What happens is I plug it into the vehicle, the EVSE recognizes it is plugged in and needs a charge, I hear the relay switch and then the EVSE turns off, restarts and continues to turn off and restart (not getting past the initial loading screen) until I unplug it and the relay closes. It does appear that the vehicle is still being charged during this restarting time but I have yet to keep it plugged in to verify. I say that because I don't hear the relay switch until I unplug the vehicle, and the vehicle dashboard shows a "time until charged" (which is basically the same time remaining as with the 6amp 110v charger).

Here is what a log looks like until it abruptly stops and turns off/restarts: $AT 02 02 32 0700^37 $SY^2E $OK 5 6 0^33 $SY^2E $OK 5 6 0^33 $SY^2E $OK 5 6 0^33 $SY^2E $OK 5 6 0^33

relayCloseMs: 100

relayHoldPwm: 255

Every time I have tried it looks like it abruptly turns off at the same time, right after the relay parameters are shown.

Troubleshooting: 

So far what I've done for troubleshooting is 

1. plugged the vehicle in fully charged - EVSE recognizes vehicle is plugged in but doesn't need charge and nothing strange happens.

2. changed maximum amperage settings up to 40amps and down to 6amps, still have same problems charging.

3. Turned off all EVSE safety checks, still have same problems.

Thank you for your reply.

Yes it seems that was exactly the problem, I built the kit and had to rewire it twice to get the signal wires as far from the high voltage wires as possible. After the fix it still went into a restart cycle once (about a minute into charging...) but I think that was a one-off problem. I'll report back if it happens again.

For future people who may have this problem, below are pictures of the setup that didn't work, and that did work.  

This was how I initially built it with the restart cycle problem. The ground wire was right close to the signal wires, so I moved that but it didn't fix the problem. I'm not sure if the ground needs to be distanced from the signal wires.