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Posted: 2023-06-01 22:12:23

After a career spent working at an investment company, Jay Iyer reckons he knows a good financial bet. And he was sure that putting solar panels on his roof would pay off handsomely. 

"Now that I'm in my 70s, I find I require more heating and cooling," Mr Iyer says.

"And that's been a significant cost.

"So I was hoping by having solar panels it would help me reduce my dependence on energy from outside."

It has been more than six months since the 72-year-old installed solar panels at his home in Castle Hill in Sydney's north-western outskirts.

Despite his initial optimism, he says the panels have been a disappointment.

He is especially unhappy about the feed-in tariff he receives of 5 cents for every unit of surplus electricity his solar panels pump back into the system.

Low feed-in tariffs 'unfair'

Solar householder Jay Iyer.()

By comparison, he says he's paying more than 30 cents per kilowatt hour to buy power from the grid.

"In terms of the return on investment, it's been poor," he says.

"We're effectively subsidising these large power companies who are, in my view, ripping us off by getting cheap power and then selling it back to us at a highly inflated price, which I find is totally not fair."

Mr Iyer is one of a large number of solar householders upset at the growing divergence between power prices and feed-in tariffs.

Last week, the Australian Energy Regulator and its Victorian counterpart, the Essential Services Commission, confirmed benchmark prices would jump more than 20 per cent from July.

It follows hefty increases to regulated prices last year and big hikes in the broader market as wholesale prices soared in 2022 and many smaller retailers hit the wall.

At the same time, feed-in tariffs for household solar exports have plunged across Australia in recent years as the number of customers with installations has soared.

Alistair Sproul, the head of the School of Photovoltaic and Renewable Energy Engineering at the University of New South Wales, says there are clear reasons for the divergence.

Crucially, he says a unique characteristic of the electricity system is pushing feed-in tariffs down.

About one in three Australian homes now has solar panels.()

Electricity unlike other goods

Unlike other commodities, Professor Sproul says electricity supply has to match demand almost perfectly at all times, meaning generation overwhelmingly needs to be used instantaneously.

Professor Sproul says storage such as batteries, pumped hydro plants, and electric vehicles will eventually change this equation, allowing surplus renewable energy to be stored for later use.

But, in the meantime, he says the real-time nature of electricity supply and demand means the daily glut of solar power will weigh heavily on prices during those hours.

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