As racks scale, power must change: The AC-to-DC rethink inside AI factories

Why biomining might finally work: How Endolith is using microbes and data to unlock more copper from low-grade ore

Copper is moving from background commodity to frontline constraint. Demand is rising fast, high-grade deposits are getting harder to find, and the lead times for bringing new supply online remain brutally long. That matters not just for renewables and electrification, but for the basic energy resilience of modern life: the wires that keep lights on, water running, refrigeration working, and data centres scaling all depend on a metal the industry already knows is becoming harder to source. Host Sylvia Leyva Martinez is joined by Liz Dennett, founder and CEO of Endolith, whose career spans Wood Mackenzie, AWS, and NASA-linked astrobiology research, to explore a biological approach to one of mining’s toughest problems. Endolith uses microbial communities, what Dennett calls “the world’s oldest miners," to help recover more copper from low-grade ore in existing heap leach operations. The company’s core thesis is that copper supply can be made more elastic not by rebuilding mine sites from scratch, but by layering biology, sensing, and robust data architecture into brownfield operations that are already running.  Liz explains how that works on site: low-grade ore is stacked into large heaps, irrigated with sulfuric acid, and treated with microbes that accelerate the chemical pathways needed to liberate more copper into solution. The appeal is not futuristic moonshot capex, but a modular, plug-and-play system designed to fit into existing mine infrastructure with minimal downtime. The discussion looks at why that matters economically. Endolith is targeting ore bodies and waste streams that are currently too messy, too low grade, or too contaminated to recover efficiently through conventional routes, including arsenic-rich material that can be especially problematic for smelting. In lab settings, the company has seen significantly higher recovery, and even modest incremental gains in the field could translate into a meaningful unlock when the underlying mine and processing system are already built. The conversation also asks why biomining may be having its moment now, after decades of false starts. Liz argues that the breakthrough is not microbes alone, but the combination of microbial science, cloud-scale data systems, and faster experimentation that lets teams build and iterate far more effectively than even a few years ago. From there, the conversation broadens into the strategic question underneath Endolith’s business: how to increase copper supply in a world where demand is being pushed simultaneously by grid build-out, industrial electrification, and the explosive growth of AI infrastructure. The episode closes on the trade-offs that follow from that reality, from financing hard-tech mining solutions to building companies in sectors where the need is obvious, the customers are conservative, and proof matters more than hype. This Horizons episode Liz refers to can be found here:  https://www.woodmac.com/podcasts/horizons/red-metal-green-demand/ [https://www.woodmac.com/podcasts/horizons/red-metal-green-demand/] This episode is brought to you by twentytwo & brand – a marketing and PR agency built specifically for energy leaders. Lots of agencies say they work with energy companies. twentytwo & brand was built for them. They've partnered with more than 120 companies driving the energy transition – from growth-stage startups to globally recognised industry leaders. Media relations, brand design, video, paid advertising and community engagement – they cover it all under one roof. No onboarding lag, no industry crash course – they speak your language on day one. If you're ready to sharpen your story and supercharge your marketing, find them here [https://www.twentytwoandbrand.com/woodmac].  See Privacy Policy at https://art19.com/privacy [https://art19.com/privacy] and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info [https://art19.com/privacy#do-not-sell-my-info].

Bigger turbines, bigger consequences: how wind is rethinking risk, insurance, and predictive maintenance

Wind remains fundamentally healthy: electricity demand is rising, decarbonised power is still needed, and both Europe and the US continue to pull new projects forward, albeit for different reasons. But the industry’s center of gravity is shifting. The conversation is no longer just about building faster or installing more megawatts. As turbines get larger, OEM competition broadens, and project economics tighten, the consequences of failure are becoming much harder to ignore. Host Sylvia Leyva Martinez is joined by Alexis Grenon, CEO of Onyx Insight, and Olly Litterick of Tokio Marine GX to examine what that shift means in practice. Their core argument is that the wind sector is moving from a development-at-speed mindset toward operational efficiency, where every dollar of ROI matters and risk has to be quantified far more precisely. They unpack why insurers still struggle with newer turbine classes despite two decades of renewables underwriting: the machines are scaling faster than the loss history, the supply chain maturity is lagging  to price them confidently, and in wind, bigger hardware often means not more failures, but far costlier ones when they do occur. A large part of the discussion focuses on blades, where exposure and difficult inspection regimes make early detection especially valuable. Grenon argues that the industry has relied too heavily on periodic inspection and not enough on continuous monitoring, contrasting the lack of standardised turbine monitoring with the smoke detector logic used elsewhere in insurance. The promise of better instrumentation, integrated SCADA and condition data, and physics-informed AI is not simply smarter dashboards. It is the ability to detect structural issues earlier, prevent minor damage from escalating into six-figure or seven-figure failures, and make better-informed decisions about maintenance, underwriting, and asset life. The episode also looks ahead to the next set of decisions facing wind owners: how to handle aging fleets, when to extend life versus repower, and how much independent real-time data can change the balance of power between owners, OEMs, and insurers. The takeaway is that better data and earlier visibility can help the industry move from reactive maintenance and blunt underwriting toward a more preventative, risk-based model, one that should improve insurability, reduce downtime, and make the next phase of wind deployment more durable. This episode is brought to you by twentytwo & brand -- a marketing and PR agency built specifically for energy leaders. Lots of agencies say they work with energy companies, twentytwo & brand was built for them. They've partnered with more than 120 companies driving the energy transition — from growth-stage startups to globally recognized industry leaders. Media relations, brand design, video, paid advertising, and community engagement — they cover it all under one roof. No onboarding lag, no industry crash course -- they speak your language on day one. If you're ready to sharpen your story and supercharge your marketing, find them at twentytwoandbrand.com/woodmac. [https://www.twentytwoandbrand.com/woodmac] See Privacy Policy at https://art19.com/privacy [https://art19.com/privacy] and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info [https://art19.com/privacy#do-not-sell-my-info].

As racks scale, power must change: The AC-to-DC rethink inside AI factories

As AI systems scale, the infrastructure challenge is no longer just about chips, models, and software performance. It is increasingly about the physical systems that allow computation to happen at all: power delivery, cooling, water access, and the speed at which new capacity can be brought online. Power conversion is becoming a much more important design question. As racks move from conventional power densities toward megawatt-scale configurations, every inefficiency in the electrical pathway becomes more consequential. For stakeholders across the energy sector, that makes AI infrastructure more than just a datacenter story. It is also a story about grid constraints, industrial load growth, thermal management, and how developers can design facilities that are efficient enough, flexible enough, and resilient enough to operate at the scale AI now demands. Host Sylvia Leyva Martinez is joined by Nick Wright, Vertical Solutions Manager at Siemens. Their conversation explores why the growth of the AI factory is pushing operators to rethink traditional electrical architecture, especially the number of conversion steps required to move power from the grid to the chip. Nick explains why conventional AC-heavy setups are under pressure as compute loads become denser, more dynamic, and more power-intensive, and why more direct AC-to-DC pathways are drawing increased attention. The episode also examines what that shift means in practice: less energy lost in conversion, less excess heat to manage, different implications for cooling design, and a growing role for higher-voltage DC systems, digital twins, monitoring technologies, and new protection equipment. Along the way, the discussion widens beyond the building itself to consider how AI facilities may evolve into more grid-aware assets, capable of interacting more intelligently with the broader energy system rather than functioning simply as passive loads. For developers, IPPs, utilities, financiers, and infrastructure planners, the episode offers a clear signal that power architecture is becoming a strategic decision much earlier in the project lifecycle. One of the key takeaways is that this is not a simple story of DC replacing AC. The more relevant point is that as racks scale, reducing unnecessary conversion steps can improve efficiency and system performance in ways that matter economically at very large scale. But the conversation also makes clear that conversion efficiency is only one part of a much broader infrastructure equation. Access to reliable power, water availability, cooling strategy, workforce readiness, supply chain bottlenecks, equipment lead times, and safety considerations all shape whether a new AI facility can be delivered on time and scaled over the long term. The players most likely to succeed will be the ones that stop treating power as a late-stage procurement issue and instead plan holistically across energy, compute, operations, and grid interaction from the beginning. This episode is brought to you by twentytwo & brand -- a marketing and PR agency built specifically for energy leaders. Lots of agencies say they work with energy companies, twentytwo & brand was built for them. They've partnered with more than 120 companies driving the energy transition — from growth-stage startups to globally recognized industry leaders. Media relations, brand design, video, paid advertising, and community engagement — they cover it all under one roof. No onboarding lag, no industry crash course -- they speak your language on day one. If you're ready to sharpen your story and supercharge your marketing, find them at twentytwoandbrand.com/woodmac. [https://www.twentytwoandbrand.com/woodmac] See Privacy Policy at https://art19.com/privacy [https://art19.com/privacy] and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info [https://art19.com/privacy#do-not-sell-my-info].

Handing back the mic: Six months of data center reality, from Bragawatts to behind-the-meter, and the questions still open

A year ago the data centre conversation was about scale. Increasingly it is about what happens when the announcements meet the physical grid. New capacity is being announced at roughly 435 megawatts a month, enough to power a city of 400,000 people, but two-thirds of that committed load tends to disappear the moment utilities ask for a financial commitment behind it. AI training facilities create load profiles that drop 30% in five minutes, or 190 megawatts in three. The grid's mechanical inertia is retiring just as hyperscaler ambition accelerates, and regulation is lagging on both sides of the meter. In this episode, interim host Bridget van Dorsten returns the microphone to host Sylvia Leyva Martinez. The two recap six months of the show through clips from Chris Seiple (Wood Mackenzie), Tom Falcone (Large Public Power Council), Akhil Batheja (Bloom Energy), Kay Aikin (Dynamic Grid), Kristina Carlquist and Christian Payerl (ABB), Shannon Miller (Mainspring Energy) and Nick Chaset (Octopus US), and map out the questions that will shape Sylvia's return. The central tension of the past six months: announcements are racing ahead, but utilities, regulators and the physical grid cannot move at hyperscaler speed. A data centre can be built in two years. New generation takes five to ten. That mismatch is why developers have stopped waiting on the grid: 35% of US data centre project capacity announced in 2025 was planned with around-the-meter generation, and 92% of bridge prime power deals are now struck before the end tenant is signed, inverting the usual logic of infrastructure development. But collocated power is still, in Bridget's framing, a science project. The load behaviour demands a coordinated portfolio: supercapacitors and UPS catching millisecond swings, synchronous condensers supplying inertia, fuel cells and linear generators offering modular, fuel-flexible bridging power as a hedge against demand risk. Nick Chaset's intervention cuts the other way: the UK already hosts the world's largest residential virtual power plant, and the cheapest megawatt is the one you don't build. The episode closes on duelling forward views, Tom Falcone's cooperative optimism against Kay Aikin's affordability death spiral, with the question of who ultimately holds the bag if the announcements don't materialise still unresolved. Sylvia sets out what she wants to explore next: the regulatory contradiction where utilities support bring-your-own-generation but cannot guarantee protection from curtailment; renewables supply constraints and the transformer and labour bottlenecks that affect every fuel source equally; the return of energy security as a framing now that "energy transition" has fallen out of political favour in the US; and the community opposition data centre developers are only beginning to grapple with. Here is the latest Horizon's piece that Bridget referenced: https://www.woodmac.com/horizons/can-us-data-centre-development-outpace-grid-development/ [https://www.woodmac.com/horizons/can-us-data-centre-development-outpace-grid-development/] See Privacy Policy at https://art19.com/privacy [https://art19.com/privacy] and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info [https://art19.com/privacy#do-not-sell-my-info].

The grid's missing operating system: Why a $100,000 AI controller could defer trillions in hardware and why utilities won't buy it

The energy transition conversation focuses on what connects to the grid. Far less attention goes to whether anyone is coordinating what those assets do once connected. AI training runs swing hundreds of megawatts in seconds as GPUs checkpoint and restart a profile that looks like a generator tripping offline. At distribution level, millions of inverter-based resources create localised variability that overwhelms individual circuits even when aggregate models look healthy. The planning tools in use today were designed for neither problem. Host Bridget van Dorsten is joined by Kay Aikin, CEO and Founder of Dynamic Grid, energy engineer, grid architecture advisor to the DOE-supported GridWise Architecture Council, and contributor to the UN Environmental Program's building decarbonisation work. Kay unpacks what an AI training facility actually does to the grid with full GPU load for hours or days, then a drop to ten percent in seconds during checkpointing. She talks about how at the scale now planned, the Stargate project in Texas alone could represent ten percent of ERCOT disappearing in four seconds. The behaviour is stochastic and cannot be modelled with traditional statistical tools. At distribution level, virtual power plants responding to wholesale signals without circuit-level visibility can create competing oscillations, the kind of emergent dynamics that contributed to the Spanish grid failure. The proposed fix is an AI controller at the substation, sending price-based signals and flexible operating envelopes to large assets and VPP operators, giving them twenty-four-hour forecasts and real-time circuit visibility. Total cost: under a hundred thousand dollars installed. The reason it isn't everywhere is cost-of-service regulation. Utilities earn returns on deployed capital, so a million-dollar transformer replacement is more profitable than software that eliminates the need for it. Without new approaches, rebuilding the US distribution grid could cost up to ten trillion dollars by 2040. Kay is developing grid utilisation metrics with regulators in Maine, Virginia, and Maryland to incentivise extracting more from existing infrastructure. The episode closes on the need for distribution system operators and the affordability death spiral that looms if the structural incentives don't shift.   See Privacy Policy at https://art19.com/privacy [https://art19.com/privacy] and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info [https://art19.com/privacy#do-not-sell-my-info].