I’m having an issue with charging my MX at home, and hoping I can find someone who has had a similar experience and can suggest a solution. Thanks in advance for reading my novel!
Overview:
I have a late-2017 HW v2.5 MX 100D. When I originally purchased it, I had a NEMA 14-50 outlet installed in my garage on a 50-amp breaker on a 6/3 circuit and used the mobile connector for charging. For the first ~1.5 years I was able to charge at 40 amps with no problem, and then for an unknown reason (no electrical changes in the home) in August of this year (2019), I started to have the following issues:
I’m a bit frustrated right now because I have considerable time and money into trying to get this fixed and have tried to address all possible causes of the issue. I’m a bit perplexed that I have the same issue at my neighbor’s house, but the power company said there are no issues with the line (was thinking it’s the local transformer or something). I may try to explore this further. Perhaps there’s a tester that will detect relevant noise that the power company couldn’t detect? Is there a specific type of noise/interference for which I should be looking? Maybe it might be worth trying to install a line filter or whole-home surge protector to knock down the interference or voltage fluctuations.
I would appreciate any suggestions or other solutions anyone has found. Thanks!
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Overview:
I have a late-2017 HW v2.5 MX 100D. When I originally purchased it, I had a NEMA 14-50 outlet installed in my garage on a 50-amp breaker on a 6/3 circuit and used the mobile connector for charging. For the first ~1.5 years I was able to charge at 40 amps with no problem, and then for an unknown reason (no electrical changes in the home) in August of this year (2019), I started to have the following issues:
- Charging often does not start.
- Receive error messages on driver display, “Unable to Charge, Disconnect Cable and Retry,” and “Charging Rate Reduced, Check Wiring.”
- When I can get it to start, it maxes out at 23 amps, and the “Unable to Charge” message remains for the entire charge. It does still show 245-252 volts, but that number only fluctuations by 1 or 2 volts when starting to charge and when charging.
- Electrician checked NEMA 14-50 wiring and tightened connections as needed. No change.
- Tried reducing charging amps in MX. I have more success getting charging started if I set to 10 amps, but I still receive the error message. And when I start charging, it will only ever go up to 23 amps, even if I gradually increase it.
- Took MX and mobile connector to TSC. They advised no issues and were able to charge my MX on their NEMA 14-50 using my mobile connector, which I observed myself.
- Charged at destination chargers (Tesla wall connector) and Superchargers with no issues.
- Tried charging on a regular 110v/12amp connection on multiple outlets in my house, and was only able to charge at 8 amps, still receiving the “Unable to Charge” error message.
- Attempted standard-outlet charges at my neighbor’s house and had the same issues as I was seeing at my own house. This one is perplexing (more on this below).
- Ran a temporary, short (5-foot) circuit on a new 60-amp breaker, 4 AWG wire, and NEMA 14-50 outlet to test an entirely new connection. Same results.
- Purchased and installed a Tesla wall connector installed in my garage on a new 60-amp circuit. Thought maybe I could account for any issues on the current wiring and breaker, and that the wall connector might be able to handle any interference better. Same results as the mobile connector/NEMA 14-50 setup.
- Turned off all breakers in my house (including solar disconnect) with the exception of the wall connector circuit, thinking that something else may be introducing noise/interference that is affecting the unit. Same results.
- Had the power company come out and check the line at the street, and they even checked the power inside at my panel. They reported no voltage issues or interference.
- Issue is not my MX or mobile connector (worked elsewhere, same issue on wall connector)
- Issue is not the circuitry (same issues on multiple circuits in my house)
- Issue is not interference from other devices in my house (isolated the circuit)
- Issue is not voltage/interference from the power lines (tested by power company)
I’m a bit frustrated right now because I have considerable time and money into trying to get this fixed and have tried to address all possible causes of the issue. I’m a bit perplexed that I have the same issue at my neighbor’s house, but the power company said there are no issues with the line (was thinking it’s the local transformer or something). I may try to explore this further. Perhaps there’s a tester that will detect relevant noise that the power company couldn’t detect? Is there a specific type of noise/interference for which I should be looking? Maybe it might be worth trying to install a line filter or whole-home surge protector to knock down the interference or voltage fluctuations.
I would appreciate any suggestions or other solutions anyone has found. Thanks!
Relevant Posts: