Jun 13, 2024 · 44m · green-blueprint
Why ditching aluminum is key to securing the US solar supply chain
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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 Frontier Forum panel, industry experts discuss the strategic, economic, and environmental imperatives of replacing imported aluminum solar module frames with domestically produced recycled steel. They highlight how steel frames enhance structural weather resilience, eliminate 90% of embodied carbon emissions, and mitigate geopolitical supply chain risks under U.S. clean energy policies.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. How this is scored →
The hosts as informed peer 5.6 Guest teaching 4.0 Guest disagreement 1.3 The hosts pushing back 1.6
speaking balance: gold is the hosts, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 39:33 Patterson demands solar mature
Patterson forcefully states that solar has to mature the hell up and stop tarnishing its brand if it wants to be the backbone of the grid.
Hardest push from the hosts ▶ 22:59 Lacey presses for tariff clarityLacey cuts through the technical policy weeds to demand a clear distillation of whether trade penalties are hurting the transition or building domestic capacity.
Biggest teaching moment ▶ 18:40 Shiao breaks down Section 301 nuancesShiao provides a deep breakdown of trade policy mechanisms, detailing non-broadcasted manufacturing equipment exemptions that lower domestic capex.
The host holds their own ▶ 17:41 Lacey details Section 301 and ADCVD frameworkLacey demonstrates command of the regulatory landscape by distinguishing between Section 301 actions and ongoing ADCVD cases across clean tech sectors.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | The hosts as informed peer | Guest teaching | Guest disagreement | The hosts pushing back | Why |
|---|---|---|---|---|---|---|
| Engineering Steel Frames: Solving Corrosion, Density, and Structural Strength | 5 | 4 | 1 | 1 | Lacey sets the engineering and macro stage smoothly, prompting Patterson on technical material constraints and Shiao on domestic manufacturing expansion. The dynamic is fully collaborative with the guests educating the audience on steel versus aluminum characteristics. | |
| Value Propositions: Supply Chain De-risking, Module Fragility, and Weather Resilience | 5 | 4 | 1 | 1 | Lacey asks targeted questions about cost comparisons, embodied carbon, and customer priorities. Patterson and Shiao lay out a comprehensive value stack covering supply chain de-risking, module fragility, and extreme weather risks. | |
| Quantifying Embodied Carbon: A 90% Greenhouse Gas Reduction with Steel | 6 | 4 | 1 | 1 | Lacey shows domain fluency by citing Boundless Impact Partners and bringing up Europe's Carbon Border Adjustment Mechanism (CBAM). Patterson and Shiao build on this with data on lifecycle emissions and Scope 3 supply chain procurement. | |
| Trade Policy Dynamics: Section 301 Tariffs and Supply Chain Certainty | 6 | 5 | 2 | 3 | Lacey navigates complex trade law, citing Section 301 and ADCVD cases, and presses Shiao to distill the actual market fear and uncertainty. Shiao provides a detailed masterclass on tariff exemptions and transition periods while Patterson highlights acute supply concentration risks. | |
| Developer Considerations: Corrosion Protection, Weight Parity, and Plug-and-Play Design | 6 | 4 | 1 | 2 | Lacey probes developer friction points, including weight penalties on tracker systems and introducing new hardware into a 1-terawatt global industry. Patterson clarifies the plug-and-play form factor and ZAM coatings that alleviate installer hesitations. | |
| Parallels to Solar Trackers and Navigating Domestic Content Bonus Rules | 6 | 4 | 1 | 2 | Lacey draws a sharp comparison between module frames and the reshoring of solar trackers, then asks a blunt question on whether domestic content bonus rules are delivering. Shiao and Patterson outline Treasury safe harbor rules and steel frame tax credit impacts. | |
| Maturing Solar: Grid Reliability and the Necessity of Energy Independence | 5 | 3 | 2 | 1 | Lacey concludes by citing Patterson's op-ed to ask who needs to get serious. Patterson delivers an impassioned plea for solar to mature into a true grid backbone, with Shiao echoing that the industry must leave the kids' table. |
Statements from this episode (13)
Origami Solar CEO: Steel is superior to aluminum for solar frame applications
“And steel's inherent fatigue resistance, higher strength it's truly just a better metal than aluminum for a steel frame application.”
Shiao: Chinese manufacturing dominance over solar components leaves industry vulnerable to shocks
“And the unfortunate reality of today for the solar supply chain is that there are parts, components of the, you know, core solar supply chain that are heavily dominated by manufacturing in, in China, and that makes the industry vulnerable to supply shocks.”
Shiao: 85 new or expanded US solar manufacturing facilities have been announced
“You know, just for solar alone, we've seen 85 new or expanded solar manufacturing facilities being announced in the U.S. That's over 28,000 jobs, that's you know, tens of billions of dollars of investment in local communities”
Patterson: Solar module size grew over 40% while structural materials shrank
“The reality is the size of modules have increased over 40%. At the same time, there's been cost down efforts on both glass and frames to reduce the material And thus, the structural capabilities.”
Patterson: Steel solar frames cut embodied emissions by 90% versus aluminum
“We knew it would be material, but we never realized it would be a 90% reduction over imported aluminum frames, and it's not just the transit from Asia to the US or Europe. It truly is just that aluminum is an insanely dirty metal”
Patterson: Steel Frames Avoid 180,000 Metric Tons Carbon Per Gigawatt
“And if you scale that to gigawatt scale, I think it's like a 180,000 metric tons of carbon avoided per gigawatt.”
Shiao: U.S. competitiveness with China will stay a priority under either administration
“It's very clear that competitiveness with China is a bipartisan issue in this country.
it is going to remain a priority for either administration in the new year after the election”
Patterson: Origami Solar does not need tariffs to build a business case
“Origami doesn't need the tariffs to build a business case.”
Patterson: 98% of solar module aluminum frame supply comes from Asia
“In our three years of actively engaging the market, we found just one crystal and silicon module maker that wasn't dependent on Asian-based aluminum frames.
So it is 98% of the supply is coming out of Asia.
Most of it's China.”
Patterson: Tracker Makers Concluded Steel Frame Weight Gain Is Immaterial
“We've talked to virtually every major tracker company, and the increase in weight is basically the conclusion that's immaterial. There's more project and site-related variables than the weight gain that has to be addressed.”
Patterson: Domestic steel traditionally costs one-third the price of aluminum
“We're actually reshoring using domestic steel, which is traditionally been about the third the cost of aluminum.”
Shiao: Top solar tracker makers planned US reshoring before the IRA
“If you talk to some of the leading tracker players, they had these plans to onshore more, ah, manufacturing here before something like, you know, the Inflation Reduction Act was even passed, just for all the reasons that Greg just talked about, carbon, logisti…”
Patterson: Module frames and glass are largest domestic content components after cells
“Well, it's material. The only thing bigger like I say, let's say we're a tie with a glass. The only thing bigger is the solar cells. And so, if you look at what is the easiest low-hanging fruit to drive a material increase it's the frame.”