Recorded Sunday 29th March. Two very different stories highlight the complexity of the energy transition - from the chemistry of steel and cement, to the geopolitics of offshore wind. The discussion explores how hidden industrial linkages, policy decisions, and market incentives shape the pace of decarbonization.

• Industrial decarbonization: A new technology turning steel waste into low-carbon cement inputs
• Energy politics: Policy decisions disrupting offshore wind development in the U.S. and U.K.

The discussion explores how hidden industrial linkages, policy decisions, and market incentives shape the pace of decarbonization.

1. Charlotte explains a technology that processes electric arc furnace steel slag so it can be reused as a supplementary cementitious material in concrete, replacing part of ordinary Portland cement. That matters because steel and cement together account for a 15% of global emissions, yet both remain hard-to-abate sectors.A key systems challenge is that as steel production shifts away from blast furnaces and toward electric arc furnaces, emissions fall, but the byproducts that cement producers historically relied on also change. New technologies can solve that mismatch while creating better economics for steel plants by turning a low-value waste product into a much more valuable cement input.
2. Lucy discusses offshore wind in the United States, and the political significance of a major offshore wind project being halted, with lease payments reportedly refunded and investment redirected toward oil and gas. In the UK, we then examine the rejection of a large proposed Chinese turbine manufacturing investment on security grounds, and what that could mean for jobs, industrial policy, and the domestic wind supply chain.

Key themes

Industrial decarbonization is deeply interconnected. Cleaning up steel production can unintentionally make cement harder to decarbonize unless new technologies emerge to bridge the gap.

Policy risk is now a major factor in clean energy investment. Offshore wind economics are shaped not only by technology and cost, but by politics, permitting, national security, and government priorities.

The energy transition is also an industrial strategy story. Decisions about where turbines are built, who finances projects, and how supply chains are structured will influence jobs, competitiveness, and long-term energy security.

Live from Octopus Energy HQ: Over-hyped, Under-hyped, or Hyped-Just-Right?

Introducing the origin story of Power Plays and celebrating with a live audience event hosted by Octopus Energy in London. We gave the audience six recent talking points in energy and asked them to vote: over-hyped, under-hyped, or hyped just right? The results weren't always what we expected. We also opened the floor to audience questions - from the future of the grid to hydropower's image problem, moonshots, and whether the North Sea still has a role to play.

The game — six topics, audience votes, live debate:

• Enhanced geothermal — less than 1% of global geothermal output today, but with oil & gas tailwinds in the US, is it finally having its moment?
• Balcony solar — a technology that started in off-grid Africa and is now trending in Germany and the UK. Does the 4–6 year payback period justify the hype?
• Vehicle-to-grid — why we both think this is deeply underhyped
• Coal phase-out — under-hyped according to the room. Why the UK's experience gives us a misleading picture of where global coal consumption is actually going
• Copper supply — the metal driving electrification, new refining and recycling technologies, alongisde substitution and optimisation opportunties
• Critical minerals geopolitics — Lucy takes the contrarian position: are we strategising for 60 very different supply chains together in a frenzied race that risks making energy more expensive for everyone?

Audience Q&A:

• The grid of the future: who builds it, who pays, and how distributed resources could let us do more with what we already have
• Why hydropower isn't sexy — and why it should be, from Snowy 2.0 to the Grand Renaissance and Itaipu
• Moonshots: space-based solar generation, beaming energy across time zones, and fusion

Recorded Sunday 15th March – In this episode we examine how the escalating Middle East conflict is moving beyond oil and gas headlines into the wider industrial systems that underpin the global economy.

We focus on how disruption is transmitted through refined fuels, fertilizers, industrial gases and metals supply chains — and why these second-order effects often shape inflation, food prices, manufacturing and energy security more than the initial price spike itself.

The episode closes with a discussion of resilience — from distributed energy and alternative production pathways to the policy options currently being considered in the UK.

Key Questions Explored:

Refined fuels:

• Why do jet fuel and diesel markets tighten faster than crude oil supply?

• Why are refineries configured for specific crude types and difficult to switch between?

• How do refined fuel shortages feed directly into aviation, freight and consumer prices?

Military logistics driving renewables adoption:

• Why is fuel logistics one of the largest operational risks in military operations?

• How do fuel supply convoys create security vulnerabilities in conflict zones?

• Why are militaries investing in microgrids, solar and battery storage to reduce fuel dependence?

Ammonia and fertilizers:

• Why is ammonia production so tightly linked to natural gas prices?

• How do fertilizer price increases transmit into global food costs and agricultural output?

• Why do many countries maintain domestic fertilizer production as a matter of national security?

Renewable ammonia and the Atome's Villeta project:

• What makes renewable ammonia viable in locations with abundant low-cost electricity?

• Why does proximity to agricultural demand and export infrastructure matter for project economics?

• How does the Villeta project illustrate a shift in fertilizer production toward renewable energy sources?

Helium:

• Why is helium supply closely tied to natural gas processing infrastructure?

• What happens to healthcare and semiconductor manufacturing when helium supply is disrupted, and what are knock-on effects for Taiwan?

• Why are global helium markets particularly vulnerable due to concentrated production?

Sulfur and sulfuric acid:

• How does sulfur recovered from oil and gas processing become a critical industrial chemical?

• Why is sulfuric acid essential for fertilizers, metal refining and battery material production?

• How can disruption in sulfur supply ripple into mining, agriculture and manufacturing costs?

What is the UK government doing to counter rising prices?

• What short-term measures can governments use to support households during energy price spikes?

• How might policies such as price monitoring, subsidies or targeted support be deployed?

• Why are distributed energy technologies like rooftop solar, batteries and flexibility increasingly central to resilience?

Recorded Sunday 8th March – In this episode we examine the energy implications of the escalating Middle East conflict and the dynamics often missing from mainstream coverage.

We explore how energy shocks move through global markets - from shipping insurance and LNG logistics to foreign exchange pressures and electricity system design.

The discussion moves region by region - examining why the impacts differ across Asia, Europe, and the United States, and why some countries may actually accelerate their energy transition during crises.

Key Questions Explored:

Strait of Hormuz and global shipping

• How can shipping disruption occur without a formal blockade?
• What impact do war risk insurance premiums have on tanker economics?
• How large is the cost increase when insurance rises to 1–2% of cargo value?

Shipping logistics and supply disruption

• What are the rerouting options if tankers avoid the Strait of Hormuz?
• How do longer routes affect LNG availability, shipping times, and prices?

Strategic reserves and floating oil storage

• How much oil is currently stored in floating storage at sea?
• How do strategic petroleum reserves function during supply shocks?
• Why has China been building reserves in recent months?

Regional exposure in Asia

• Why might China be exposed but relatively resilient?
• Why are Pakistan, Bangladesh and Vietnam particularly vulnerable?
• Why are Japan and Korea, despite their wealth, among the world’s most exposed energy importers?

Energy security and foreign exchange

• Why are fossil fuel imports effectively a continuous drain on foreign currency reserves?
• How can energy price spikes trigger inflation and balance-of-payments pressures?

• How does importing energy infrastructure differ from importing fuel?

Crisis-driven energy transitions

• How did Cuba expand solar generation during an electricity crisis?
• Why are rooftop solar and batteries spreading rapidly in Pakistan?
• How did Ethiopia’s EV policy emerge partly from foreign currency pressures?

Electricity systems and grid resilience

• Why do electricity grids provide stability that off-grid systems struggle to replicate?
• How did Spain’s limited interconnection with Europe increase blackout risk?

Europe’s gas exposure

• Why do gas-fired power plants often set the marginal electricity price in Europe?
• How can relatively small gas shortages trigger large electricity price spikes?

The United States

• Why is the US relatively insulated from global energy shocks?
• How do higher prices create producer windfalls but consumer pressure?
• Could AI data centres significantly increase US gas demand?

Recorded on Monday 2nd March. We discuss the first energy market reactions to the escalating Middle East conflict and what it reveals about global supply chains. We also explore Google’s new data-centre energy strategy, Form Energy’s push to commercialise 100-hour batteries, and how distributed storage can help free up capacity to bring more capacity online faster.

• Initial energy shocks from the Middle East escalation – what the conflict could mean for global energy and commodity markets.
• War-risk premiums and shipping implications – how insurance markets are disrupting global energy and commodity flows
• The overlooked commodity that links energy to food – why sulfur shortages could ripple through fertilizer markets and push up agricultural costs.
• Connecting load to the grid - why it's often harder than building new generation.
• Google’s new strategies for powering data centres – 2 projects in Minnesota and Texas each show different combinations of colocation, storage, and interconnection strategies to speed up interconnection.
• The rise of multi-day batteries – why LDES can reshape how grids handle extreme weather and renewable volatility.
• Form Energy – how iron-air batteries store electricity by turning iron into rust and back again.
• Why 100 hours matters – the multi-day grid stress events that this technology is built to solve.
• Batteries vs grid expansion – how distributed storage could defer hundreds of billions of dollars in transmission upgrades and bring more capacity online faster.
• A growing policy divide – why the US is subsidising energy manufacturing while Europe focuses on lowering electricity prices.

Recorded 22 February 2026. Episode Discussion Points:

• Two solid-state transformer startups raised major funding this week
• Why transformers are a critical bottleneck in grid expansion and amidst modernisation pressures
• Differences between traditional iron-core transformers and solid-state transformers
• How SSTs use semiconductor power electronics and software control
• What the benefits of SSTs are
• Why data centres are an early target market for SST technology

Energy Security

• Coal becoming linked to energy security narratives in the US
• Energy security increasingly shaping policy decisions
• Government support for coal plants despite economics
• Military interest in resilient energy systems and microgrids
• Role of renewables in reducing fuel logistics risks

Future / Speculative Energy Infrastructure

• Space-based solar power concepts
• Space-based data centres powered by solar
• Economic and engineering challenges of space energy systems

Recorded 15th February. Delivering the energy transition increasingly depends on the inputs required: materials availability, processing capacity, & the industrial policy that determines what actually gets built.

Rising demand for critical minerals is driving supply-security concerns, strategic stockpiles, recycling scale-up, & copper innovation. It’s also increasingly shaping industrial investment decisions, particularly in Europe. This week’s headlines illustrate that:

· Policy signal - Project Vault: The US proposed a strategic critical minerals reserve with $12B of financing to reduce reliance on foreign suppliers, mainly China. It could work if treated as a resilience stockpile, but $2B of private investment signals returns expectations, which may push it to act like a market instrument not insurance.

· Rare earths - geopolitics most concentrated & recycling as a hedge: Cyclic Materials $75M Series C to scale rare earth recycling & diversify supply beyond primary mining. RE magnet supply chains remain highly concentrated, especially in heavy’s where China has almost a complete monopoly & has tightened export controls since 2023.

· But in battery recycling, a pivot: Redwood Materials $425M Series E, for a growing stationary energy storage business using recovered & second-life batteries. Originally focused on circular battery supply chains, the move reflects tighter recycling margins, rising storage demand & benefits of vertical integration.

The story extends to copper, the metal of electrification. Without significant new supply coming online soon, net-zero risks being short-circuited as it’s highly conductive, durable & recyclable, with few grid-scale substitutes:

· Cu processing: Two biomining deals - Transition Metals Solutions ($6M seed) & Endolith ($13.5M Series A) to improve Cu recovery from lower-grade ores using microbes. The promise; lower energy & access to stranded resources. Challenges; speed, control & industrial scale-up.

· Cu recycling: Recuperate Metals $6M seed to mechanically upgrade Cu scrap & industrial waste into higher-quality secondary feedstocks. If scalable, it could accelerate capacity with lower capex & energy intensity, but impurities, input variability & qualification timelines remain hurdles.

· Cu substitution: DexMat $5M seed to scale production of carbon-nanotube conductive fibre. It won’t replace copper broadly, but could be used in weight-sensitive or high-performance niches like aerospace or satellites.

Materials pressure doesn’t stop at clean-tech supply chains, it’s reshaping heavy industry as carbon policy tightens:

· European steel: ArcelorMittal confirmed a €1.3B EAF project at Dunkirk - currently its only new-build investment. Using scrap steel, DRI/HBI, & some hot metal, it cuts emissions 3x cf. the traditional BF-BOF approach.

· Policy driver - CBAM now operational: Europe is extending carbon pricing to imports making C intensity a real competitiveness factor. It’s creating investable conditions for industrial decarbonisation by narrowing the cost gap between EU producers & higher-emissions imports - favouring lower-emissions production, particularly scrap-heavy EAF steel backed by low-C power.

Recorded Feb 6th 2026. Access to electricity and speed to power remain defining challenges, but the deeper issue emerging is how to ensure deliverable capacity at the exact moment demand peaks, which is increasingly critical for grid reliability.

With transmission projects often taking a decade, substation upgrades costly and contentious, and new generation facing interconnection delays, this week’s deal headlines centre on a core question: how do you create dependable capacity without simply building more generation?

The answers are emerging in layers - from grid-scale storage to distributed assets, orchestration software, market consolidation, and policy reform:

1. Grid-Scale Storage: Terralayr secured $72M in project-finance debt to deploy front-of-the-meter battery systems, highlighting grid-scale storage as one of the fastest deployable reliability resources. Batteries are increasingly treated as predictable infrastructure assets delivering dispatchable capacity without new power plants.
2. Distributed Capacity: Lunar Energy raised $232M in growth capital to scale residential battery deployment. Homes are becoming active grid participants, with distributed storage transitioning from backup resilience products to scalable capacity assets aggregated into VPPs. his shift places flexibility at the grid edge, helping defer costly infrastructure upgrades while improving utilisation of existing assets.
3. Orchestration Layer: WeaveGrid expanded its DISCO (Distribution-Integrated System Capacity Orchestration) platform beyond EV charging to include residential batteries through a partnership with SolarEdge. As distributed assets scale, software coordination is becoming critical, making flexibility visible, controllable, and dispatchable for utilities.
4. Market Validation: Storm Fern provided a real-world test of how storage, distributed assets, and market signals performed under stress, and at scale. Storage and demand response played a central role in maintaining reliability, with volatility increasingly tied to short flexibility gaps rather than prolonged generation shortages.
5. Market Consolidation: NRG’s acquisition of CPower as part of a $12B transaction with LS Power, signals incumbent adoption of flexibility as core infrastructure. The deal adds roughly 6 GW of commercial and industrial demand-response capacity, effectively expanding virtual power plant capabilities within mainstream utility operations.
6. Policy Signal: Virginia passed the first U.S. legislation explicitly focused on grid utilisation, requiring regulators and utilities to measure how effectively existing infrastructure is used before approving new buildout.

Then we move on to discuss:

• Data Centres & Speed-to-Power: Over 50 GW of on-site generation, much of it gas-fired, is being built ahead of grid connections, raising concerns about emissions lock-in.
• Overbuild vs Grid Integration: Off-grid renewables require significant overbuild reinforcing the continued value of interconnected grids that aggregate flexibility across regions
• New Procurement Models: Mechanisms like CTTs and BYOC allow large loads to contract power directly while leveraging distributed flexibility, accelerating deployment without full co-location.