ZorbatheGeek
New Member
- Joined
- Aug 30, 2020
- Messages
- 35
So......... I supervised the installation of a PV-Growatt-Supercapacitor system on Oct 2020 for my parents........ there is grid power as well, so although there is no buy-back it is a solar grid-tie system.
The site consists of a large lodge with a series of separate chalets for accomodation, plus garage, all connected to the main distribution panel which is now fed (via manual changeover switch) by the Growatt SPF5000 TL HMV-P. The system is 240V 50HZ single phase.
In January this 2021 I was zapped by a plug socket in one of the(newly wired) chalets, and discovered the "technician" had wired neutral and ground together in the entire socket circuit !!!! Once I had rectified this the next issue was to find what is/was causing the live neutral, with the following conclusion/questions:
I have an electrician currently going through all the circuitry, checking grounding, replacing underground cables, connections, separating sockets from lighting circuits etc in order to rule out a problem with consumer side - if nothing resolves the issue I will call in the warranty with the PV installers.
The site consists of a large lodge with a series of separate chalets for accomodation, plus garage, all connected to the main distribution panel which is now fed (via manual changeover switch) by the Growatt SPF5000 TL HMV-P. The system is 240V 50HZ single phase.
In January this 2021 I was zapped by a plug socket in one of the(newly wired) chalets, and discovered the "technician" had wired neutral and ground together in the entire socket circuit !!!! Once I had rectified this the next issue was to find what is/was causing the live neutral, with the following conclusion/questions:
- when selecting the manual inverter bypass (so running the household on grid) the neutral return disappears.
- isolating the neutral output from the inverter, with the inverter idling but with no load, there is still a live neutral. This does not seem to cause a problem (except when somebody bonds earth and neutral as I discovered)
- I've been given some advice by a professional solar installer acquaintance who says its highly unlikely to be the inverter, and that something else with the neutral circuit is causing the inverter to "make its own neutral"
- Another local solar installer says that some inverters do produce a volatage on neutral
I have an electrician currently going through all the circuitry, checking grounding, replacing underground cables, connections, separating sockets from lighting circuits etc in order to rule out a problem with consumer side - if nothing resolves the issue I will call in the warranty with the PV installers.