We just received our EVSEUgraded Panasonic EVSE yesterday and the car charged for the first time ever at our house on L2 this morning between about 8:00AM an 9:00AM. During this period of time, the Envoy unit for our Enphase PV system reported 0W of production. At this point I will assume that only powerline communication was disrupted, but I cannot be sure since the production reported on Enlighten
during that period is nonsensical. This afternoon I should be able to easily determine if production stops by turning on the charger and observing our power meter to see if power is flowing out of our house or in. If it is flowing in, then charging has stopped production as well as powerline communication,
My belief is that this is caused by the same problem reported in the Electrical line noise while charging at 240V thread
, but I had understood that our LEAF was built after Nissan had already incorporated the fix for L2 conducted emissions.
I have a couple of questions as I begin my engagement with Nissan to get this resolved:
Q1: I ran 10/3 (plus ground) to the outlet, even though the neutral was not required. It is a long, difficult run of about 150 feet and I want to be able to repurpose it in the future, if desired. While it is clear that I should cap the neutral (white) wire at the outlet end, I'm thinking perhaps I would be better off capping the end in my main panel, as well. As it stands right now, that wire is capacitively coupled to the L1 and L2 ( black and red) wires, so any voltage noise will be coupled directly into the neutral in my main panel. There is also magnetic coupling, so any ripple currents will also induce currents into the neutral. Unfortunately, the Envoy communicates with the microinverters using the neutral line, so this is likely where the noise is coming from. Does anyone know the code requirement for this white wire in the panel? Should it be connected to the neutral bar or capped?
Q2: Does anyone know of a car later than mine (5926) that included a charger with the L2 noise problem?
Q3: Is there any law which limits the conducted emissions from the charger in the LEAF? If so, what is it and which government agency oversees it?
Q4: Is the Envoy one of those devices that we simply must accept that it doesn't work if communication is disrupted by noise?
Q5: Has anyone else with an Enphase PV system seen this problem with L2 charging? If so, what is you LEAF serial number and what was the resolution (other than "charge at night")?
(Speaking of that, let's not have the "charge at night discussion in this thread. That has been and can be discussed in other threads. TIA!)
Thanks to all for any insights regarding this problem!