https://www.abc.net.au/news/2018-11-08/high-voltage-fuelling-increased-electricity-consumption/10460212 
"I was getting up once every three or four months to change light globes," he told 7.30. "And this is what led me to look at voltage.
"I'm being force-fed more electricity than I need," he said. After he realised the scale of the problem he started a company that specialises in filtering out extra voltage in homes and businesses.
7.30 visited his house in Melbourne on a day when the grid was delivering electricity at 254 volts — just above the allowable voltage limit. "Based on the 254 volts I'm getting here, I'm roughly paying about $1,200 more for my electricity each year than I need to. "We have a major issue with regulating voltage across Australia. And it's getting worse."
Voltage is essentially electrical pressure.
It is the force that sends electrical current from power stations, through transmission lines, to your home or business. The nominal voltage for Australian households is 230 volts, but because voltage fluctuates all the time, electricity should be delivered within an allowable range of between 216 and 253 volts. For households in much of Australia, electricity is supplied with voltage towards the top end of that range and even just above the 253-volt limit. Depending on the appliances in your home, that can mean greater electricity consumption and bigger power bills. "Most customers just are not aware of it, so nothing happens about it," electrician Dean Spicer told 7.30.
"Once an appliance reaches saturation, that excess energy just burns off as heat, which is just money down the drain."
But high-quality comprehensive data on the voltages supplied to households is not easy to come by. Voltage to households running high. 7.30 asked two companies to take a snapshot of electricity meters across most of Australia. Their findings give an indication of the scale of the issue. The metering company Metropolis sampled 12,012 electricity meters four times a day from October 19 to 30, in all states and territories except the Northern Territory and Western Australia. The readings taken at 1:00pm, when rooftop solar panels are boosting network voltage, averaged 245.8 volts — within allowable limits, but well above the 230 nominal level. But even at night, when extra voltage from solar power is not a factor, the network voltage is still running high. The average minimum reading recorded by Metropolis was 241.6 volts.