So I bought a Tesla HPWC with the intention of putting a J1772 cordset on it while I wait for my Model 3.
Some random thoughts on the HPWC:
-The gen 2 actually looks pretty complicated with multiple levels of circuit boards.
-The industrial design both internally and externally that went into this is pretty neat.
-From using it and from the manual I see no indication in the light patterns for differentiating between EV not connected and EV connected but not charging.
-Looks like they have planned a version with a plug as the manual indicates an error condition where the wall plug or input terminals are over temp.
-Neat that they have a reset button. Holding for 2-3 seconds resets the current error condition and 5 seconds to force it to reboot it self.
-I don't like how Tesla does revisions. For example how does one tell the difference between the gen 1 HPWC and the gen 2? Is it the name change? For example I see a gen 1 installation manual for a "High Power Wall Connector" but the gen 2 installation manual is for a "Wall Connector" and in the store they call it just a "Wall Connector"
-The optional top conduit option is pretty nice. You bring your wires into it and they easily terminate on screw terminals. Then it has large pigtails of finely stranded wire that you then connect inside the EVSE part that you can easily attach after the other part is mounted to the wall.
-I wish we had access to a more indepth service manual.
Some thoughts on changing the cordset to J1772:
-So my first warning is that the the Tesla cordset is very custom. It's not simply unscrew the terminals and replace it like other EVSEs.
-The line 1/2 and ground connections are actual screws so need crimped ring/spade connectors
-Line 1 and 2 have little wires pigtailed off into a connector (presumably for stuck relay detection) which you need to cut and resplice or go through the effort of getting the correct connector.
-It does have a place for a proximity wire though I haven't come across any indication of what it does with it.
-Their cordset has a thermistor in it which is required, I replaced it with a resistor to ground.
-Their cordset has a wire for 3.3 volts which you could use in your cordset if you had extra wires for a light, etc.
-The screws on the cable clamp are a bit funky, really long and fine threaded. I think I ended up cross threading one as I couldn't get it tightened all the way back.
Now the issue I'm having.
I have two 2011 LEAFs. One with a charge timer set and one without. I get the same behavior on both. They generally both just beep and do not start charging or click the EVSE on to measure the voltage. There has been a time or two in playing around and such that it did start but it's a pretty consistent in behavior. On either LEAF hitting the timer override button causes it to immediately start charging.
Huge rave to GlennD for building the EV Sim II I have and nsayer and whoever else helped with the project. Using this I believe I may have discovered the issue. When the EV is connected the EVSE sends a 5% duty cycle for 10 seconds indicating digital communication required, then a couple seconds of none, and then finally the duty cycle representing the amperage it is set for. At this point I'm not sure there is anything else I can do if that is in fact the issue.
Some random thoughts on the HPWC:
-The gen 2 actually looks pretty complicated with multiple levels of circuit boards.
-The industrial design both internally and externally that went into this is pretty neat.
-From using it and from the manual I see no indication in the light patterns for differentiating between EV not connected and EV connected but not charging.
-Looks like they have planned a version with a plug as the manual indicates an error condition where the wall plug or input terminals are over temp.
-Neat that they have a reset button. Holding for 2-3 seconds resets the current error condition and 5 seconds to force it to reboot it self.
-I don't like how Tesla does revisions. For example how does one tell the difference between the gen 1 HPWC and the gen 2? Is it the name change? For example I see a gen 1 installation manual for a "High Power Wall Connector" but the gen 2 installation manual is for a "Wall Connector" and in the store they call it just a "Wall Connector"
-The optional top conduit option is pretty nice. You bring your wires into it and they easily terminate on screw terminals. Then it has large pigtails of finely stranded wire that you then connect inside the EVSE part that you can easily attach after the other part is mounted to the wall.
-I wish we had access to a more indepth service manual.
Some thoughts on changing the cordset to J1772:
-So my first warning is that the the Tesla cordset is very custom. It's not simply unscrew the terminals and replace it like other EVSEs.
-The line 1/2 and ground connections are actual screws so need crimped ring/spade connectors
-Line 1 and 2 have little wires pigtailed off into a connector (presumably for stuck relay detection) which you need to cut and resplice or go through the effort of getting the correct connector.
-It does have a place for a proximity wire though I haven't come across any indication of what it does with it.
-Their cordset has a thermistor in it which is required, I replaced it with a resistor to ground.
-Their cordset has a wire for 3.3 volts which you could use in your cordset if you had extra wires for a light, etc.
-The screws on the cable clamp are a bit funky, really long and fine threaded. I think I ended up cross threading one as I couldn't get it tightened all the way back.
Now the issue I'm having.
I have two 2011 LEAFs. One with a charge timer set and one without. I get the same behavior on both. They generally both just beep and do not start charging or click the EVSE on to measure the voltage. There has been a time or two in playing around and such that it did start but it's a pretty consistent in behavior. On either LEAF hitting the timer override button causes it to immediately start charging.
Huge rave to GlennD for building the EV Sim II I have and nsayer and whoever else helped with the project. Using this I believe I may have discovered the issue. When the EV is connected the EVSE sends a 5% duty cycle for 10 seconds indicating digital communication required, then a couple seconds of none, and then finally the duty cycle representing the amperage it is set for. At this point I'm not sure there is anything else I can do if that is in fact the issue.
