The ABC did a piece on high voltages across the network and we are getting a lot of enquiries about it.
A device called a SolarIQ from a company called Edge Electrons was proposed as a potential solution. These cost about $1500 installed.
Are they worth it?
At the moment I cannot recommend them. Here's why:
I have a SolarIQ (also called EdgeIQ) on my house, but it has never worked. Edge Electrons are saying that it is because I have a complicated installation (battery, micro inverters + 3 phase supply).
The EdgeIQ is a single phase device and so far they can't make it work on my 3 phase house. I can't see why that should be a problem as all my solar, and battery and almost all my appliances are on one of the phases - the phase with a high voltage problem.
I also have multiple voltage monitors on my house.
When the Edge IQ was first switched on it claimed to be regulating the voltage - but all my instrumentation couldn't see any regulation happening. This may have been due to a faulty installation - but Edge Electrons could not work it out and essentially gave up - putting the device in 'Bypass Mode'. So it just sits on my wall buzzing now - doing nothing except using electricity.
If Edge Electrons ever get the SolarIQ / EdgeIQ working - I'll post a full review. At the moment I cannot recommend it.
Further - if you have high voltage issues - my advice is that voltage regulation devices on your home should be a last resort.
The first thing you should always do is check that the voltage rise is not caused by your solar system (specifically the cable to the grid being too thin).
Then your sparky should check the voltage of the local grid.
Those steps are described here:
My Inverter Keeps Tripping or Reducing Power On Over-voltage. What can I do?
If it is your local grid - you should do everything you can to get your local network to fix the grid- they have a legal obligation to. Get your local Energy Ombudsman involved if you have to.