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[Episode #251] – South Australia on Point

Jun 4 2025

This episode is the final part in our miniseries about Australia's energy transition.

In late 2024, Chris traveled to Australia and recorded interviews with a wide range of experts who are intimately involved in the energy transition there. We featured some of them in the earlier episodes of this miniseries, namely, Episodes #234, #235, #246, #247, and #249.

In this episode, we take a close look at South Australia, where rooftop solar alone already powers the entire state grid at times. By 2027, South Australia plans to operate with 100% variable renewable energy, making it the first gigawatt-scale grid in the world to achieve this milestone.

The challenge? SA Power Networks, the distribution grid operator, doesn't control generation, transmission, or metering, and doesn't buy or sell electricity. This means South Australia must figure out how to maintain a stable, reliable grid consisting largely of customer-owned energy resources.

In this conversation, James Brown, Head of Network Strategy at SA Power Networks, explains how his team of engineers and stakeholders are finding innovative solutions to meet this challenge. Their approaches will offer valuable lessons for grids worldwide as they, too, transition to electricity systems almost entirely powered by variable renewables.

Guest:

James Brown is Head of Network Strategy for SA Power Networks. James is responsible for facilitation and oversight of long-term strategy to ensure that the network, and the services it delivers, adapt to changing environmental factors.

James has over 10 years’ experience delivering world-leading strategy and innovation in the energy sector. His current role is leading the Network Strategy team at SA Power Networks’ Network Innovation Centre, responsible for pilots, trials and major programs of work that are shaping the distributed energy future.

On LinkedIn: https://www.linkedin.com/in/james-brown-a856a7114/

Geek rating: 9

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[Episode #249] – Solar Innovation in Australia

May 7 2025

Mini Episode

This episode continues our miniseries on Australia’s energy transition.

In late 2024, Chris traveled to Australia and recorded interviews with a wide range of experts who are intimately involved in the energy transition there. Previous episodes in this miniseries are Episode #234, Episode #235, Episode #246, and Episode #247.

In this episode, we feature three researchers and entrepreneurs in Australia who are advancing solar technology research and development:

Martin Green, Professor at University of New South Wales, Sydney and Director of the Australian Centre for Advanced Photovoltaics.
Craig Wood, CEO of Vast Energy, a concentrated solar thermal power (CSP) company.
Richard Payne, CEO of RayGen, a concentrated solar PV and solar thermal company.

In the next and final episode in this miniseries, we’ll take a close look at how one Australian state is solving the challenges of knitting together customer-owned systems into a reliable power grid.

Guest #1:

Craig Wood is the CEO of Vast. Craig has led Vast since 2016, proving the internationally awarded solar thermal technology at a Pilot Plant in regional NSW and leading the development of Vast Solar’s first utility-scale plant in Mount Isa, Queensland.

Craig is an experienced leader with a background in corporate management, structured finance and the energy and technology sectors. Prior to joining Vast in 2015, he worked in London, NewYork, Sydney and Perth and has held leadership roles in diverse industrial and manufacturing organisations including Browne’s Dairy, Archer Capital, and Lehman Brothers.

Craig holds a BSc in Mechanical Engineering from the University of Western Australia and a MSc of Finance from the London Business School. He was also a Rhodes Scholar at the University of Oxford.

On LinkedIn: https://www.linkedin.com/in/craig-wood-59bb3a111/

On the Web: https://www.vast.energy/

Guest #2:

Dr. Martin Green is Scientia Professor at the University of New South Wales, Sydney and Director of the Australian Centre for Advanced Photovoltaics, involving several other Australian Universities and research groups. His group’s contributions to photovoltaics are well known and include holding the record for silicon solar cell efficiency for 30 of the last 39 years, described as one of the “Top Ten” Milestones in the history of solar photovoltaics. The PERC solar cell that he invented in 1983 and his team developed to its full potential accounted for 91.2% of worldwide silicon solar module production in 2021 (CPIA).

Major international awards include the 1999 Australia Prize, the 2002 Right Livelihood Award, also known as the Alternative Nobel Prize, the 2007 SolarWorld Einstein Award, the 2016 Ian Wark Medal from the Australian Academy of Science, the prestigious Global Energy Prize in 2018, the 2021 Japan Prize, the 2022 Millenium Technology Prize and, with three former students, the 2023 Queen Elizabeth Prize for Engineering.

On the Web: Martin’s page at UNSW

Guest #3:

Richard Payne is the CEO of RayGen, where he has been since 2015. Previously at RayGen, he served as Chief Operating Officer responsible for the development of RayGen’s core technology. Prior to that, he worked at Ceramic Fuel Cells Limited, where he held the roles of Engineering Manager, General Manager of Operations, and Chief Operating Officer. Richard is a qualified Chemical Engineer and spent time in the steel industry as a process engineer prior to his role in developing and commercializing fuel cell technology. He’s committed to tackling climate change and protecting of the environment, and is passionate about birdwatching and native gardening.

On LinkedIn: https://www.linkedin.com/in/richard-payne-0a83871/

On the Web: https://raygen.com/

Geek rating: 8

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[Episode #234] – Transition in Australia 2024

Oct 2 2024

Mini Episode

In August 2024, Chris commenced a three-month research trip across Australia and New Zealand to explore their unique challenges and opportunities in the energy transition, and to conduct interviews with the people involved. This episode kicks off a miniseries based on those travels.

We start by speaking with Giles Parkinson, a journalist for more than 40 years who has arguably covered Australia’s energy transition more thoroughly and consistently than anyone else. Giles is the founder and editor of Renew Economy and the co-host of the weekly Energy Insiders Podcast as well as the founder of two other websites: One Step Off The Grid, which provides information to consumers contemplating what they can do to support the energy transition, and The Driven, which is billed as “Australia’s most-trusted and well-read electric vehicle news site.”

In this roughly 90-minute conversation, we frame up the big picture on Australia’s energy transition, including the major themes and vectors of change. We discuss several significant energy transition projects as well as the politics of the energy transition in Australia, including the roles of various government agencies.

Guest:

Giles Parkinson is founder and editor of Renew Economy, and is also the founder of One Step Off The Grid and founder/editor of the EV-focused The Driven. He is the co-host of the weekly Energy Insiders Podcast. Giles has been a journalist for more than 40 years and is a former business and deputy editor of the Australian Financial Review.

On Twitter: @GilesParkinson

On LinkedIn: Giles Parkinson

On the Web: Giles’ page at Renew Economy

Geek rating: 6

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[Episode #188] – Getting to a 100% Clean Grid

Dec 21 2022

Mini Episode

How much of a role might wind, solar, nuclear, transmission, power plants equipped with carbon capture and sequestration (CCS) technology, or direct air capture of CO2 play on a 100% clean power grid? Which mix of those technologies would provide the cheapest pathways to a clean grid?

And once we have met 90% of the need for grid power with clean generation, what will we need to meet the last 10% of the demand for grid power? Will it be ‘overbuilt’ wind and solar? Dispatchable geothermal, hydropower, and bioenergy generators? Seasonal storage using hydrogen or batteries? Conventional fossil-fueled plants with CO2 capture? Or might it be some mix of flexible demand technologies? Or some or all of the above?

For that matter, how certain can we even be about modeling the possible solutions years or even decades ahead? Are there solutions that might play a large role in the future but that we can’t yet model very well? How confident should we be that whatever the solutions turn out to be, we will end up with not only a grid that is completely free of carbon emissions but also one that is fully reliable?

In this episode, we speak with a senior researcher at the US National Renewable Energy Laboratory (NREL) who has been researching and modeling grid power for many years. In this quite technical discussion, we review two new NREL reports that address these questions and show that producing a 100% clean power grid is not only technically feasible by a variety of pathways but also commercially feasible and ultimately, cheaper than continuing to run the fossil-fueled power grid we have today.

Geek rating: 9

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[Episode #187] – Transition in Vermont, Part 2

Dec 7 2022

Mini Episode

This is Part 2 of the first series in a new format we are piloting for the Energy Transition Show. Instead of exploring a particular topic with one guest who has a non-commercial perspective, as most of our shows so far have done, this new format aims to tell the stories about how the energy transition is proceeding in some of the places Chris visits in his travels. Through interviews with multiple local experts, including those who are working in the energy sector, we hope this new format will help to demonstrate how the unique challenges and opportunities in every place will determine its particular path through the energy transition.

We are kicking off this new show format with some stories about Vermont for a simple reason: When it comes to the energy transition, Vermont stands out as a place that punches way above its weight. It has innovated numerous policies and mechanisms to reduce its energy consumption and carbon emissions that have been emulated by other US states. And it continues to serve as a model to the rest of the country for effective energy transition strategies.

You’ll learn more about all of these accomplishments, as well as what makes Vermont such an exemplar in the energy transition, in this two-part miniseries based on interviews with eight local experts.

Part 1 was in Episode #186, in which we discussed the supply side of Vermont’s energy picture. In this second part, we look at the demand side.

Interviews with guests featured in this episode were recorded from October 11-15, 2021.

Geek rating: 4

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[Episode #186] – Transition in Vermont, Part 1

Nov 23 2022

Mini Episode

This is the first show in a new format we are piloting for the Energy Transition Show. Instead of exploring a particular topic with one guest who has a non-commercial perspective, as most of our shows so far have done, this new format aims to tell stories about how the energy transition is proceeding in some of the places Chris visits in his travels. Through interviews with multiple local experts, including those who are working in the energy sector, we hope this new format will help to demonstrate how the unique challenges and opportunities in every place will determine its particular path through the energy transition.

In this first part, we talk about the supply side of Vermont’s energy picture. In the second part, we’ll look at the demand side.

Interviews with guests featured in this episode were recorded from October 11-15, 2021.

Geek rating: 4

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[Episode #182] – 7th Anniversary Show

Sep 28 2022

Full Episode

For our Seventh Anniversary show, energy researcher Jonathan Koomey rejoins us to review major stories over the past year, and to take stock of how the energy transition has progressed.

We talk about how the global energy crunch we covered in 2021, in Episode #158, has evolved into a full-fledged global energy crisis in 2022. We reflect on the theme of Episode #181, “Command Capitalism,” and consider the increasing interventions governments are making in energy markets to manage the crisis. We muse on the episodes we did over the past year on the trajectory and speed of the energy transition. We consider the outlook for storage systems, in light of the episodes we did on that subject. We discuss how incumbents have resisted the energy transition, as we covered in our episode on utility corruption, and ask whether incumbents are gaining or losing ground. We review the highlights of our shows on the latest IPCC report and on climate modeling. And Jon shares some of his latest work in energy modeling.

It's a smörgåsbord of energy transition goodness, so strap on a napkin and join us!

Geek rating: 8

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[Episode #174] – Decarbonizing Britain’s Grid

Jun 8 2022

Mini Episode

As the energy transition proceeds and variable renewable power from wind and solar displaces conventional generators, strict operational limits for the grid's voltage, frequency, and inertia must be maintained. To do this, grid operators are increasingly procuring so-called “stability services” and making other enhancements to the grid that ensure stability.

In this episode, we take a close look at how Great Britain is undertaking this stability challenge by interviewing Julian Leslie, Head of Networks and Chief Engineer at National Grid ESO, which runs the transmission grid for the country. Not only does National Grid ESO operate the fastest-decarbonizing electricity network in the world, it has also recently achieved several important technical accomplishments for the first time in the world, including implementing cutting edge tools that allow accurate measurements of inertia across its system; using grid-forming inverters to provide synthetic inertia; and using synchronous condensers without an associated prime mover. And in another world-first achievement, the company has actually written the specification for using grid-forming inverters into its grid code.

Julian explains all of these technical concepts in today’s conversation and lays out the deliberate strategy that the company is taking to ensure that it can deliver on Great Britain’s decarbonization objectives while maintaining system stability and saving British consumers a great deal of money.

This is a highly technical episode with a Geek Rating of 9, so if you want to brush up on grid power engineering concepts first before listening to this one, you could start with our Energy Basics miniseries—in particular, Episode #126 about how power generators and the grid works—then move on to Episode #55 on voltage stability, and then Episode #153 on grid-forming inverters. Then return to this one.

Geek rating: 9

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[Episode #170] – Thermal Storage and District Energy

Apr 13 2022

Mini Episode

Scholarship on the energy transition has given a good deal of attention to battery storage, because it can help make variable renewables more dispatchable over longer periods of time, and because it’s a core part of electric vehicles. Numerous models have projected that we’ll need a very large amount of battery storage starting several decades from now, when renewables approach 80% of grid power supply, meaning long-duration and seasonal storage will become more necessary.

But what if that isn’t true? Many of those models assume that heating, ventilation and air conditioning (HVAC) loads, which account for about half of total power demand, will need to be met by electricity stored in batteries. But what if we could provide heat directly, by saving or recovering waste heat, and then using it as heat, without going through the conversions (and energy losses) of converting heat to electricity and then back to heat? What if using waste heat and other low-temperature sources were actually a far more efficient way to meet those demands?

In this episode, we discuss thermal storage for the first time on this show, to understand the state of the art and its potential, as well as where much more research on thermal storage is needed. Our guest is Daniel Møller Sneum, a postdoctoral researcher from Technical University of Denmark, an expert on thermal and district energy who wrote his PhD about flexible district energy systems. We’ll only scratch the surface of the thermal storage topic in this episode, but we hope that it helps our listeners begin to learn about this important and badly under-studied sector.

Geek rating: 6

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[Episode #168] – Storage Futures

Mar 16 2022

Mini Episode

Everyone understands that storage will play an important role in the energy transition, as we move from conventional thermal power plants that can be dispatched at will to energy systems predominantly supplied by variable renewables.

But important questions remain: how much storage will be needed? What type of storage is best? When will storage be most important? There hasn’t been a lot of great scholarship on these practical implications for deploying storage across the grid so far, but a multi-year project called the Storage Futures Study that was just completed by researchers at the National Renewable Energy Laboratory (NREL) advances the literature considerably. The seven component reports of the Storage Futures Study explore when and where a range of storage technologies are cost-competitive, depending on how they're operated and what services they provide for the grid, as well as the role and impact of relevant and emerging energy storage technologies in the US power sector across a range of potential future cost and performance scenarios through the year 2050.

In this episode, we’re joined by Nate Blair, principal investigator of the study, to explain its findings and how their modeling was done. Nate is the Group Manager of the Distributed Systems and Storage Analysis group at NREL, and draws upon almost 30 years of experience in energy systems modeling and energy analysis, including nearly two decades of work at NREL where he held roles developing the System Advisor Model and PVWatts system modeling tools, as well as the ReEDS electric grid planning model. He has deep expertise in this type of modeling and walks us through all of the findings of this important new study.

Geek rating: 9

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