Nov 3, 2023 · 1h 8m · catalyst
The Volts crossover episode
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this crossover episode of Catalyst and Volts, clean tech analysts Shayle Kann and Dave Roberts debate the most overhyped and underhyped trends across clean energy, examining topics including thermal batteries, supply chain onshoring, interest rate headwinds, SMRs, and carbon offsets.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Shayle holds 41% of the talking time here. How this is scored →
Shayle as informed peer 6.2 Guest teaching 2.8 Guest disagreement 2.5 Shayle pushing back 2.9
speaking balance: gold is Shayle, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 25:32 Dave attacks quantitative carbon wonkiness
Dave forcefully rejects Shayle's narrow focus on emissions math, accusing technocratic wonks of fleeing necessary cultural and political fights over gas hookups.
Hardest push from Shayle ▶ 1:00:15 Shayle rejects market substitution optimismShayle directly challenges Dave's faith in rapid market substitution by highlighting that new mines take 15 to 20 years to build, creating dangerous medium-term demand bottlenecks.
Biggest teaching moment ▶ 17:31 Shayle educates on heat pump and storage temperature bandsShayle reframes Dave's blanket thermal storage thesis by systematically breaking down industrial heating into high-temperature storage applications versus low-temperature direct electrification.
Shayle holds their own ▶ 41:36 Shayle outlines macroeconomic squeeze on clean energy equitiesShayle presents concrete market data demonstrating how high capex clean tech indices dropped 35% under rising interest rates while broader equities grew.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Shayle as informed peer | Guest teaching | Guest disagreement | Shayle pushing back | Why |
|---|---|---|---|---|---|---|
| Pre-Show Announcements and Newsletter Promotion | 0 | 0 | 0 | 0 | This is an introductory sponsor and housekeeping segment with brief voiceover and podcast promos. No substantive dialogue or dynamic exchange occurs. | |
| Host Introduction and 'Ask Catalyst' AMA Announcement | 5 | 1 | 1 | 1 | Shayle introduces the crossover concept and opens a friendly rapport with Dave Roberts. Both playfully discuss how to frame overhyped versus underhyped trends for energy nerds. | |
| Shayle's Underhyped Trend: Clean Energy Supply Chain Onshoring | 8 | 2 | 2 | 2 | Shayle demonstrates deep domain expertise by walking through the historical manufacturing trajectory of solar and detailed post-IRA domestic supply chain dynamics. Dave agrees and contributes collaborative questions about global market share and graphite export curbs. | |
| Dave's Underhyped Trend: Thermal Storage for Industrial Heat | 7 | 5 | 2 | 3 | Dave lays out the case for thermal batteries unlocking industrial heat decarbonization and avoiding grid interconnection bottlenecks. Shayle adds technical nuance by delineating high-temperature thermal storage from low-temperature industrial heat pumps. | |
| Shayle's Overhyped Trend: Electric and Induction Stovetops | 6 | 4 | 5 | 5 | Shayle argues induction cooktops are climatically irrelevant, prompting Dave to push back on the cultural and political significance of eliminating residential gas connections. Shayle maintains his strictly quantitative carbon framing in response. | |
| Dave's Overhyped Trend: Small Modular Nuclear Reactors | 7 | 4 | 4 | 4 | Dave critiques small modular reactor hype and historical nuclear subsidies, framing nuclear as merely one firm balancing option. Shayle notes he initially expected to disagree strongly before finding common ground on licensing hurdles and modular construction realities. | |
| Mid-Roll Sponsor Messages: Bloom Energy, Engie, and EnergyHub | 8 | 3 | 1 | 2 | Following mid-roll ads, Shayle presents a well-researched analysis of how prolonged high interest rates disproportionately penalize high-capex clean energy equities and PPA pricing. Dave readily concedes he had not fully analyzed the macro impact. | |
| Dave's Underhyped Trend: Geogrids and District Heating Networks | 6 | 4 | 2 | 3 | Dave pitches geothermal geogrids as a clean transition pathway for struggling gas utilities. Shayle pushes back on the utility death spiral premise while agreeing on the formidable logistical hurdles of retrofitting non-greenfield districts. | |
| Shayle's Overhyped Trend: Voluntary Carbon Offset Markets | 7 | 2 | 2 | 3 | Shayle draws on his personal background to explain why the media obsession with voluntary carbon offset fraud overstates the market's relatively tiny two-billion-dollar scale. Dave briefly confuses offset markets with corporate renewable PPAs before Shayle clarifies the distinction. | |
| Dave's Overhyped Trend: Critical Mineral Supply Shortages | 8 | 4 | 6 | 6 | Dave contends critical mineral shortages are overhyped because market capitalism reliably solves materials constraints through substitution. Shayle forcefully counters with mining project lead times of 15 to 20 years, warning that multi-year supply pinches could derail EV adoption targets. | |
| Big-Picture Reflections on the IRA and Clean Tech | 6 | 2 | 2 | 3 | The hosts reflect on the transformative momentum of the IRA funding rollout. Shayle pushes back against the common industry trope of easy versus hard to decarbonize sectors, clarifying that decarbonizing the power grid itself remains extremely difficult. |
Statements from this episode (22)
Kann: Canadian Solar is building a 5GW cell facility in Indiana
“This is Canadian solar, which despite the name is really a Chinese solar manufacturer setting up a five gigawatt cell manufacturing facility in, in Indiana.”
Kann: US will never match China in clean energy manufacturing volume
“Now, to be clear, I don't think there's a future wherein the U S produces as much Of any of these things as China does, but we don't need to if our point is to, you know, get high on our own supply, basically.”
Roberts: Thermal batteries will unlock decarbonization of industrial heat
“I think the reason it's going to be a big enough deal that even normies will hear about it is that it is going to be this kind of skeleton key that unlocks the decarbonization of industrial heating and cooling, which is, you know, one of the big quote unquote …”
Roberts: Power-to-heat thermal storage reaches 95% efficiency
“Which gets you way higher efficiency. Like you can get 95% of your heat back out.”
Kann: Electric stoves are overhyped because cooking emissions are negligible
“The reason that I think it is overhyped is that from a climate context, I don't think it really matters. Like at the end of the day, it's not, your stove is not a significant load in your home, and so you can electrify it or not, and I guess maybe it matters i…”
Kann: Banning gas boilers is much more impactful than stove bans
“You could do a gas boiler ban. That would be a much more difficult to pull off thing, but a much more impactful thing if you wanted to do something that mattered.”
Roberts: Nuclear power is just one firm clean balancing option
“I just want people to see nuclear, not as some sort of special, unique kind of power, but simply one of the options on the table for balancing longer term Renewable energy. One among others, there are other options. There's geothermal, there's longer term stor…”
Roberts: DOE prioritizes standardized nuclear construction practices over modular hardware
“If you talk to the people at the DOE, the loans office, they'll tell you what needs to be replicated and done the same way over and over again is not necessarily the hardware, the chunks of hardware, it's construction practices. It's the construction sub parts…”
Roberts: The commercial nuclear industry is historically corrupt and incompetent
“What I don't want is the sort of generalized hype around SMRs to translate into just yet another round of a large and historically Corrupt and incompetent industry getting another giant round of subsidies dumped on its head for ultimately nothing, which is wha…”
Kann: Clean tech's high CapEx structure makes it uniquely sensitive to interest rates
“Most clean energy technologies , the thing about them is that they are high capex, low opex... And because they're high capex, low opex, that makes them particularly sensitive to the cost of financing.”
Kann: S&P Clean Energy Index is down 35% in 2023 while S&P 500 is up 8%
“So far this year, the S&P 500 is up eight percent as of this recording. The S&P clean energy index is down 35%.”
Kann: US renewable PPA prices rose over the past year due to rates and component costs
“The PPA prices for renewables have been going up for the past year in the U S both because of interest rates and because some component prices had been rising as well.”
Kann: Clean energy delivered costs may rise in the short-to-medium term
“In the short to maybe midterm the actual delivered cost of energy or, you know, mobility, if you're an electric vehicle on or whatever it is, it might go up if you're choosing the clean option.”
Roberts: Geogrids are the cheapest, cleanest way to heat and cool buildings
“And basically, if you can build one of these things, you have what I think is Easily the cheapest and cleanest and most efficient way of heating and cooling buildings that exists in the world, as far as I can tell.”
Roberts: All US natural gas utilities are facing a death spiral
“And that's an alternative to natural gas utilities, slowly withering and dying, which is what all the natural gas utilities across the country are facing right now.”
Kann: The voluntary carbon market is broken and full of vaporware
“I agree that that market is a mess and broken, and there's a lot of vaporware there.”
Kann: Voluntary carbon credits represent about a $2B global market
“It's about a two billion dollar total global market for voluntary carbon credits.”
Roberts: Substitution and market supply will solve critical mineral shortages long-term
“I just think substitution plus new sources. Over the midterm, mid to longterm, is going to solve this. I agree that there will be years, couple of years, choke points here and there, as we've all, as we've already seen a couple of materials get tight. But I ju…”
Kann: Average mine development timeline worldwide is 15 to 20 years
“The average time it takes to build a new mine right now, pretty much everywhere in the world, 1520 years.”
Kann: Mineral shortages could cause 5-to-10-year stalls in EV adoption
“It's that we'll have like periods of more like five years or 10 years where we do have a shortage and the shortage doesn't translate to we can't sell any more electric vehicles. To higher costs for electric vehicles. And that translates to lower demand. And th…”
Roberts: Hard-to-decarbonize sectors will be technologically easier than expected
“Hard to decarbonize sectors are going to be easier to decarbonize than I think is expected, technologically speaking. And I think that's been a theme in the clean energy transition now for decades is that the technological challenges turn out to be a lot more …”