Dull Men's Club
An unofficial chapter of the popular Dull Men's Club.
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Why does the council recommend turning them off?
We had a category 2 cyclone approaching.
I only described it as inclement weather, so as not to become "exciting men's club"...
I thought it was about if there are fallen powerlines they can turn off the mains, but they can't turn off the solar panels feeding wires potentially causing an electrical hazard?
Happy to wait for an expert opinion.
Nope, basically all solar inverters will switch off if the grid goes down. They need the 50hz signal to synchronise. Even with a battery, unless you buy the separate box, your battery will switch off without the grid.
Yes, this is a requirement in order for the inverters to be certified and thus be sold. So unless someone imports something directly from China and it happens to be made very dodgy, the inverters will shut off when the mains input goes down.
There was even a bit of an issue with micro-inverters. The regulations in the EU said the inverter should physically disconnect, but a lot of micro-inverters used solid state switches to disconnect. IIRC the language was then changed to just specify it should disconnect and not how it should do that.
There are hybrid inverters that support dark start (no grid) but yes, as you mentioned, they only do this when they have internally dropped the grid feed, to prevent such a back feed event.
Perhaps the worry is that if wind rips things up, you've potentially got live electrical wires exposed?
Yeah, but that isn't prevented by turning the inverter off. 🤷
Among other things, yes...