Insanely Cheap Energy

You probably keep hearing about the shift to renewable energy. It’s not new.  And yet many, if not most, people are playing a “wait & see” game.

For centuries, coal was the cheapest source of power, and it enabled the industrial evolution, from which we’re all benefitting. But a few years ago, solar power actually became cheaper then coal … which also brings benefits of cleaner air, and no residuals to dispose of, which is a problem for coal and an even bigger problem for nuclear.  Here’s an interesting, detailed history of the evolution of really cheap solar power.  I’ll add practical comments afterwards.

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‘Insanely cheap energy’: how solar power continues to shock the world


Australian smarts and Chinese industrial might

made solar power the cheapest power humanity

has seen – and no one saw it coming


Royce Kurmelovs


The Guardian

24 Apr 2021


In the year 2000, the International Energy Agency made a prediction that would come back to haunt it: by 2020, the world would have installed a grand total of 18 gigawatts of photovoltaic solar capacity. Seven years later, the forecast would be proven spectacularly wrong when roughly 18 gigawatts of solar capacity were installed in a single year alone.

Ever since the agency was founded in 1974 to measure the world’s energy systems and anticipate changes, the yearly World Energy Outlook has been a must-read document for policymakers the world over.

Over the last two decades, however, the IEA has consistently failed to see the massive growth in renewable energy coming. Not only has the organisation underestimated the take-up of solar and wind, but it has massively overstated the demand for coal and oil.

Jenny Chase, head of solar analysis at BloombergNEF, says that, in fairness to the IEA, it wasn’t alone. Chase says:


“When I got this job in 2005, I thought

maybe one day solar will supply 1% of

the world’s electricity. Now it’s 3%.

Our official forecast is that it will

be 23% by 2050, but that’s

completely underestimated.


“I see it as the limits of modelling. Most

energy system models are, or were, set

up to model minor changes to an energy

system that is run on fossil fuel or nuclear.

Every time you double producing capacity,

you reduce the cost of PV solar by 28%.


“We’ve got to the point where solar is the

cheapest source of energy in the world in

most places. This means we’ve been trying

to model a situation where the grid looks

totally different today.”


This rapid radical reduction in the price of PV solar is a story about Chinese industrial might backed by American capital, fanned by European political sensibilities and made possible largely thanks to the pioneering work of an Australian research team.

The deep history begins with a succession of US presidents and the quest for energy independence. First was Richard Nixon, who in November 1973 announced Project Independence to wean the US off Middle Eastern oil.

Then came Jimmy Carter, who declared the energy transition the “moral equivalent of war” in April 1977 and pumped billions of dollars into renewable energy research, which came to a screeching halt when Ronald Reagan came to power.

But by then, interest had been piqued in Australia.



The father of PV solar

The solar cell was invented when Russell Shoemaker Ohl, a researcher in Bell Labs, noticed in 1940 that a cracked silicon sample produced a current when exposed to light. However, little improvement had been made until the contribution of Martin Green, a young engineering professor working out of the University of New South Wales.

Born in Brisbane, Green had spent some time in Canada as a researcher before circling back home in 1974. A year later he had started a PV solar research group working out of a small university laboratory built with unwanted equipment scrounged from big American engineering firms.

His first experiments, alongside a single PhD student, involved looking for ways to increase the voltage on early solar cells. Green says:


“Pretty soon, we started beating all

these groups in the US in terms of

the voltage we could get. Nasa had

a project that had six contractors

working on it. We beat them all.”


Not long after, Green and his team began to raise their ambitions. Having boosted the voltage, the next step was building better quality cells. Their early efforts broke the world efficiency record in 1983 – a habit the team would continue for 30 of the next 38 years.

In the very early years of the industry, the received wisdom had been that a 20% conversion rate marked the hard limit of what was possible from PV solar cells. Green, however, disagreed in a paper published in 1984.A year later, his team built the first cell that pushed past that limit, and in 1989 built the first full solar panel capable of running at 20% efficiency.

It was a moment that opened up what was possible from the industry, and the new upper limit was “set” at 25% – another barrier Green and his team would smash in 2008. In 2015, they built the world’s most efficient solar cell, achieving a 40.6% conversion rate using focused light reflected off a mirror.



Rise of the Sun King

Out of this whirlwind of activity, the Chinese solar industry would be born largely thanks to an ambitious physicist named Zhengrong Shi.

Born in 1963 on Yangzhong Island, Shi had earned his master’s degree and come to Australia a year before the Tiananmen Square protests. He had spotted a flyer advertising a research fellowship and talked Green into bringing him on as a PhD student in 1989.

Shi would finish his PhD in just two and a half years – a record that still stands today. By the time he became Dr Shi, he had so impressed Green that he stayed on as a researcher.

With time, the university was increasingly looking to commercialise its world-leading solar cell technology and struck up a partnership with Pacific Power in 1995. The government utility sank $47m into a new company called Pacific Solar. A factory was set up in the Sydney suburb of Botany and Shi was made the deputy director of research and development where he quickly earned a reputation for resourcefulness and precision. Green says:


“Zhengrong basically ran the company.”


Shi stuck it out for a few years but in November 2000, he was made an offer. At a dinner held at his home, four officials from the Chinese province of Jiangsu suggested the 37-year-old researcher and Australian citizen return to China and build his own factory there. After some consideration, Shi agreed and ended up settling in the small city of Wuxi where he founded SunTech with $6m in startup funding from the municipal government.

Shi’s arrival caused a stir. The ability to cheaply build conventional PV solar panels with 17% efficiency was far beyond what his competitors were capable of. Shi says:


“That was a shock to them. When they

saw we were making solar cells of large

area and high efficiencies they said, ‘Wow.’


“The first reaction was: that’s the future.

Everybody said that’s the future. But they

also said it was one step too early. What

they meant was that there was no market for

it yet. In China at the time, if you mentioned

solar, people thought of solar hot water.”


All that would change when Germany passed new laws encouraging the uptake of solar power. Quickly it became clear there was a massive global demand and the world’s manufacturers were struggling to keep up with supply.

Spying an opportunity for investment, a consortium that included Actis Capital and Goldman Sachs came knocking to pitch Shi on taking the company public. When the company listed on the New York Stock Exchange in 2005, it raised $420m and made Shi an instant billionaire. A year later he would be worth an estimated $3bn and crowned the richest man in China, earning him the moniker “the Sun King”.

Having shown the way, the Chinese PV solar industry began a massive expansion. SunTech alone boosted its production capacity from 60 megawatts to 500MW, and then to 1 gigawatt in 2009. The company grew so fast, its supplies of glass, polysilicon and electronic systems needed to build its panels came under strain, forcing it to invest heavily in local supply chains.

“And then, you know the rest,” Shi says.



Dirt cheap power – at a price

As with the rest of China, the rate of technological development in the PV solar business makes for an industry that builds itself up one day, tears itself down the next, and then remakes itself again the day after. With razor-thin margins and cut-throat competition, everyone is always one step away from falling.

Around 2012 the world market was flooded with solar panels, sending the price plummeting through the floor, leaving SunTech vulnerable. Already under intense financial pressure, disaster struck when an internal investigation found a takeover bid it had launched had been guaranteed by €560m in fake German government bonds.

Upon discovering the bonds didn’t exist, Shi was removed as CEO of his company and a year later SunTech would file for bankruptcy protection when it couldn’t repay a $541m loan that fell due in March 2013.

Whatever befell SunTech later, the Macquarie University emeritus professor John Mathews says the company played a pivotal role in changing both China and the world forever.

In a quirk of history, what had begun as an American drive to wean itself off oil was eventually taken up by China, which made solar power dirt cheap in the process. Mathews says:



“The Chinese approach to renewables is

all about energy security. At the scale

from which they’re building new indus-

tries, they would need colossal imports

of conventional fossil fuels, which would

cripple them economically.


“They can get around that problem, which

is a geopolitical obstacle, by manufac-

turing their own energy equipment.”


Today Green and Shi keep in touch. Both are working on new projects. Shi is overseeing a new company while 72-year-old Green is looking for new innovations to explore.

One such innovation is the stackable solar cell. Though still a niche technology very much in the early stages, the basic idea is to lay a material over a solar cell in order to boost its power output. Green says:


“We think a 40% module, rather than

the 22% you can do nowadays with

PERC, is what the industry will be doing

Once we perfect this stacking approach.

We’re just trying to find a new cell that

will have all the qualities of silicon that

we can stack on top of silicon.


“The International Energy Agency now says

says solar is providing the cheapest energy

the world has ever seen. But we’re headed

towards a future of insanely cheap energy.


“It’s a fundamentally different world we’re moving into.


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Changing habits it not easy – especially when it comes to things we’ve done all our lives. For each of us to change our lives to using solar power – when we’ve grown up using whatever power source our utility decides to provide, and when our cars have always run on gas – is not easy.  Plus, there are so many voices out there advocating for and against virtually anything, it’s difficult to know what to believe.

Last week, I was listening to an older woman whose husband is ill and who doesn’t have much money. She mentioned how they’re just eking by, but close to paying off the loan on their $30,000 (gas) car.  I suggested that she look at one of the $30,000 electric cars.  She was puzzled.


  • The solar tax credit would instantly cut her cost by $7,500, so her $30,000 car would now cost her only $22,500.


  • Maintenance on our e-car has been just over $200 a year, while maintenance on our gas car has been over four times that.


  • And if she put solar panels on her house – for which she can get a home improvement loan – she could repay that loan and power her home and car for far less than what she pays now.


Here’s a woman who works hard for the income she gets. Yet she’s spending far more than she needs to if she were to change to products that are proven, not experimental.  To me it makes no sense, especially when she complains about a lack of money.


Is she simply trapped by habit?


Are you?


What will it take for each of us to make simple changes that will reduce our costs, give us the same or better amenities, and contribute to a healthier world?

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