wattmatters
Established Member
- Joined
- Sep 29, 2023
- Messages
- 679
- Reaction score
- 704
- Points
- 214
- Location
- Bellingen, NSW Australia
- Driving
- MG4 Trophy LR
Certainly the case for us.In NSW Australia voltage is typically between 240 & 250 volts usually at the higher end during the day when there are a lot of PV systems feeding the grid from rooftop solar.
Here's our per phase grid voltage for the past two years. Lines mark a nominal 230 V, with extras shown at 253 V and 258 V being the range in which solar PV inverters need to invoke production limiting and/or inject reactive power in an effort to limit voltage rise. Stay above that for for too long and inverters shut down (ones which are correctly set to current standards that is).
We've needed some DNSP support at times to deal with grid over voltage issues. Most recently was a problem with the local 11 kV supply which needed some work to rectify.
The EV acts as a helpful load to help keep line voltage in check, at least on its phase (which is the white phase in the above chart).
One of the reasons I often limit the charge current setting to well below maximum is so it doesn't charge too quickly - that way it provides a bit of load for a longer period and/or spreads it over a couple of days. That bit of load can be enough to help reduce solar inverter throttling.
Last edited by a moderator: