I suspect wifi is required for firmware updates as mentioned in the "Remote Metering" video I cited earlier.
What revision version is your WC (last character of part number). Early versions of WC 3 didn't have RS-485 populated.
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1938241-00-A Smart Current Limits Meter - Wall Connector
- Thread starter DBeckwith
- Start date
What revision version is your WC (last character of part number). Early versions of WC 3 didn't have RS-485 populated.
First charger is about 15 ft of conduit to install location, the second charger is roughly 25-30 ft (opposite side of garage). It appears installer ran with the WC power cables, not sure if they ran additional shielding on the wire or if / how they extended. I can pull the WC face to take a look at the wirebox in a few days.
WC Revision Numbers
Tesla Wall Connector for Tesla vehicles:
1457768-02-G
Tesla Wall Connector for Non-Tesla vehicles (J1772 plug — for an upcoming non-Tesla delivery)
1509549-02-B
I purchased both WC units about 2 weeks ago from Tesla’s online shop, they both should be latest revisions.
At this point in time I no longer need this part. My electrician is able to pull higher guage wires to upgrade our subpanel to 100 amps.
I'm still interested, however.
As you all know, once you own a Tesla you become an EV ambassador so to speak. As such, questions about home charging options can't be answered with just a shrug. In my opinion, this product makes most installations that are too complex or too expensive moot.
An official installation manual would help us be better ambassadors.
I'm still interested, however.
As you all know, once you own a Tesla you become an EV ambassador so to speak. As such, questions about home charging options can't be answered with just a shrug. In my opinion, this product makes most installations that are too complex or too expensive moot.
An official installation manual would help us be better ambassadors.
Wow, this sounds interesting. On the European side the home grid connections are typically three-phase connections, which makes the load sharing even more important. For example, I have 3x25A @ 230V, 17 kW total power, each phase can be loaded up to 5.7 kW. The difficulty is that the car loads each phase evenly, so the charge current must be adapted to the available current of the most loaded phase.
Even a 3rd-party integration would be quite a killer app for Tesla's favor, as the TWC v.3 is also a very affordable device. The biggest reason Tesla drivers choose something else is the lack of smart current limiting.
Even a 3rd-party integration would be quite a killer app for Tesla's favor, as the TWC v.3 is also a very affordable device. The biggest reason Tesla drivers choose something else is the lack of smart current limiting.
Interesting.
I wonder why Tesla don't promote this since it is a relatively simple approach to much of the charging infrastructure challenges. Think of the people who won't consider EVs because of perceived prohibited "home" charging options. Think of the money that could be saved if just a few electricians knew of this option. Almost any site with limited electrical capacity could support level 2 charging without upgrading facility electrical system.
I wonder why Tesla don't promote this since it is a relatively simple approach to much of the charging infrastructure challenges. Think of the people who won't consider EVs because of perceived prohibited "home" charging options. Think of the money that could be saved if just a few electricians knew of this option. Almost any site with limited electrical capacity could support level 2 charging without upgrading facility electrical system.
Exactly. There are many 3rd party wall connectors which have either wired or wireless current sensors to limit the charge current on peak loads. It would be so nice to have a this kind of sensor unit with three current loops, connecting either over WiFi or RS-485. Or, have an open interface towards TWC v.3, so that a 3rd party device could control it.
I'm using 3x10A and only overnight charging (starting at 11PM), so that at all times my house could use the remaining 3x15A. Most of the time I would have at least 3x16A available for charging, but I need to plan for the worst overnight case.
I'm using 3x10A and only overnight charging (starting at 11PM), so that at all times my house could use the remaining 3x15A. Most of the time I would have at least 3x16A available for charging, but I need to plan for the worst overnight case.
davewill
Active Member
It might be possible to reverse engineer the control protocol on the RS-485, then use an Arduino or such to connect to a third party monitoring solution and control the WC in the same way.
TWC v.2 RS-485 protocol has been reverse engineered: GitHub - dracoventions/TWCManager: Control power delivered by a Tesla Wall Charger using two wires screwed into its RS-485 terminals.
davewill
Active Member
I knew that. Thanks for linking the thread. The biggest problem with a DIY solution is that it might prove impossible to deploy, as an inspector might not be willing to approve it. However, I'm sure there will be interesting and productive uses for it anyway.
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Looking at post #37 (1938241-00-A Smart Current Limits Meter - Wall Connector), I'd like to have a device with three current sensor loops (for each of the three phases), with either WiFi or RS-485 communication.
On TWC side I would like to be able to specify that TWC should adjust the charge current signal so that the most loaded phase would not exceed a configured limit, like 25A in my case.
I bet many people would be willing to pay more than half of the price of a TWC for such a device.
I just looked at the configuration page of my TWC. I have the same firmware version, but there's no 'Metering' configuration.
On TWC side I would like to be able to specify that TWC should adjust the charge current signal so that the most loaded phase would not exceed a configured limit, like 25A in my case.
I bet many people would be willing to pay more than half of the price of a TWC for such a device.
I just looked at the configuration page of my TWC. I have the same firmware version, but there's no 'Metering' configuration.
Hello,
How has this worked out for you so far? Any issues or glitches seen from time to time? I am considering going with this solution as well and would like to know how the system works, reliability etc. Thanks
Not widely available and not marketed by tesla officially. Its only offered by select tesla's preferred installation experts/firm.
Hi, would,you mind taking 2 more pictures? I want to see the comm connection of the Neurio and the second one back of the Wall connector RS 485 (I want to see where the wires are connected (position wise) on both the neurio and wall connector) thanks!
Vaillant
Member
There’s more in this thread. Sounds really promising!
teslamotorsclub.com
Here’s the description on Tesla’s site:
And here’s the $250 product you need to buy:
Finally! Dynamic Power Management for wall connector
I just discovered that Tesla has launched Dynamic Power Management, AKA upgrade avoidance, for the Wall Connector. Something I have been wanting for years. Really Awesome. Here is the link. Not offered together with the Wall Connector Group Power Management yet. As you can see in the article...
teslamotorsclub.com
Here’s the description on Tesla’s site:
And here’s the $250 product you need to buy:
Thanks for the details on this. Going to give it a shot as this will work great with my Model Y that is coming in on Saturday. I will put up the Tesla Wall Connector and this device into the electrical panel. I already have an Emporia Energy Smart Vue system that I'll have to determine if both devices can play nicely with each other. If not, guess I will need to decide if I want dynamic power management on my EVSE or whole home power monitoring. I went with the refurbished version to save some coin over the $250 package. Neurio part #1112484-99-A and data cable part #1133339-00-A which were $100 shipped.
Also, this should work well with my Tesla installed solar panels and battery backup system. At least from what I've read.
I'll follow the guide that someone recently posted here: DIY Tesla Wall Connector with Load Management
Also, this should work well with my Tesla installed solar panels and battery backup system. At least from what I've read.
I'll follow the guide that someone recently posted here: DIY Tesla Wall Connector with Load Management
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