Podcast Summary: Energy Gang – "Energy storage steps up: the growing role of batteries on the grid, and the challenge from winter storms"

Host: Ed Crooks (Wood Mackenzie)
Guests:

• Amy Myers Jaffe (NYU’s Energy, Climate Justice and Sustainability Lab)
• Julian Nebreda (President & CEO, Fluence)
  Date: February 10, 2026

Episode Overview

This episode explores the rapid evolution and growing importance of battery energy storage on the US electric grid, especially in the face of capacity stressors like extreme weather, AI-driven demand, and data centers. The hosts and guest Julian Nebreda discuss the record expansion of grid-scale battery deployment, their role during severe winter storms, regulatory and supply chain hurdles, and how batteries are reshaping the electricity sector itself. The episode ranges from practical deployment experiences (like in ERCOT/Texas) to philosophical and policy implications—capturing the high stakes and rapid changes underway in energy storage.

Key Discussion Points & Insights

1. State of Battery Storage and Market Drivers

• Massive Growth in US Grid-Scale Batteries

  • Rapid scale-up, especially in Texas, framing it as a supercharged capitalist state where batteries have boomed in the past two years ([00:00], [38:36]).
  • Ed highlights US market grew 50% last year to 16 GW installed grid-scale storage ([25:07]).

• Drivers for Storage Expansion

  • Extreme weather, growing industrial and AI data center demand, and limitations on quickly deploying new generation pushed batteries as the fastest, most efficient capacity solution ([06:11], [05:48]):

    “The fastest and most economically efficient way to deliver capacity is battery storage. Even in places where gas is abundant, there’s no way of resolving your capacity needs with natural gas—storage is the best way.”
    — Julian Nebreda [06:56]

  • Regulatory uncertainty, trade issues, and supply chain (“beautiful build act”, tariffs) caused a brief pause in US momentum but not a structural reset ([06:11], [27:02]).

• Batteries and Data Centers

  • Data centers, with volatile, growing electricity needs, are significant new clients for battery storage, especially given lagging grid connections ([04:15], [46:33]).

2. Batteries in Extreme Weather and Grid Resilience

• Performance in Brutal Winter Storms

  • Storage delivered up to 6 GW at peak in recent storms—“only 1%” of US supply but critical in averting outages ([08:05]):

    “If that 1% wasn’t there, you’d definitely notice it… That 1% was the difference between crisis and continuity.”
    — Ed Crooks & Julian Nebreda [09:07], [10:05]

  • Batteries excel for rapid response and maintain grid resilience when generators (gas, coal) falter; can prevent cascade failures ([10:05], [13:57]).

• Two Daily Peaks & Winter Storage Use

  • Debunking the idea batteries can't handle two demand peaks daily; Fluence designs systems for multiple cycles, as seen in Europe and increasingly in the US ([13:13]):

    “We design systems for two charges, two cycles a day… no issues at all, no technical issues.”
    — Julian Nebreda [13:36]

• Cold Weather Performance

  • Modern battery systems (even in Finland!) perform reliably in extreme cold with high availability—matching or exceeding other grid assets ([14:27]).

    “Historically they said in cold weather, batteries don’t work... well, there are no main issues on our ability to respond to weather conditions—even minus 5, minus 10 degrees.”
    — Julian Nebreda [14:40]

3. Functional Role of Storage: Not a Replacement, a Transformer

• Complementarity with Other Generation

  • Batteries are not “fuel tanks” and don’t aim to supplant all gas/coal; rather, they complement by handling rapid response, peak shaving, and buffering intermittent sources:

    “Battery storage is not a fuel tank. We can provide capacity very, very quickly at low cost. Gas peaking should be provided by battery storage today.”
    — Julian Nebreda [18:02]

  • Enables running thermal plants at optimum efficiency (near baseload), lets batteries handle variable demand.

• Changing System Design Paradigms

  • Batteries fundamentally alter the century-old paradigm of always synchronizing real-time generation and load ([18:50], [22:17]):

    “It completely changes the way we can think about the electricity, about how we design electricity sectors.”
    — Julian Nebreda [21:30]

• Grid vs. Decentralization

  • While batteries enable more distributed and virtual power plant models (VPPs), Nebreda and Jaffe agree grid is still the optimum supplier of reliable, economic power for most users. But failure to adapt will drive more customers “behind the meter” ([40:49], [41:09], [43:44]):

    “If the utility sector doesn’t provide it, they’ll figure out a way to provide it for themselves.”
    — Amy Myers Jaffe [40:07]

4. Supply Chain, Policy, and Technology Evolution

• Responding to US Supply Chain/China Concerns

  • Fluence prepared early for MADE IN USA requirements and “foreign entity of concern” rules—aims to localize supply chains and work with trusted global partners ([28:04], [31:20]):

    “We’re working now on the supply chain, the real minerals, battery production—it’s fundamental for security. Top priority as a company.”
    — Julian Nebreda [29:55]

  • Supports US-Canada-Latin America collaboration on raw materials and processing but emphasizes open competition for efficiency.

• Can the US Compete on Cost?

  • Nebreda argues US innovation, market forces, and urgency (from AI and grid bottlenecks) will enable competitive, potentially leap-frogging technologies like next-gen (solid state/sodium/lithium) batteries ([35:46], [37:07]):

    “The speed is going to change the way the US behaves... if the US is something, it’s very good at creating industries quickly.”
    — Julian Nebreda [37:48]

5. Data Centers as Storage Pioneers

• New Demand and Battery Business Models
  • Primary use case: “Speed to power” where batteries bridge data centers’ grid connections with strict curtailment/interruption rules ([46:33], [51:12]):

    “Most data centers want to connect to the grid... the fastest way to meet grid conditions is connecting with batteries.”
    — Julian Nebreda [50:34]

  • Batteries also used for backup, power quality (especially for AI computation’s fast, volatile loads), and reducing diesel genset reliance ([49:47], [50:00]).

6. Real-World Case: Puerto Rico, Distributed vs. Centralized Solutions

• Bad Bunny’s Super Bowl “Apagon” as a Symbol
  • Discussion of grid unreliability in Puerto Rico—debate over distributed (community-scale solar/storage) vs. central grid repair in hurricane-prone regions ([54:55]):

    “In a place with storm history, is it better to go distributed?”
    — Amy Myers Jaffe [58:26]

  • Nebreda endorses a mixed solution—robust microgrids for communities with a resilient grid backbone ([59:00]):

    “It’s a false dichotomy... resiliency of the national grid depends on your ability to connect distributed systems.”
    — Julian Nebreda [59:21]

Notable Quotes & Memorable Moments

• Texas as Energy Storage Hotspot:

  “Texas is like a supercharged capitalist state... they have deployed a giant amount of batteries in the last two years.”
  — Amy Myers Jaffe [00:00], [38:36]

• Industry Urgency Metaphor:

  “We need, as an industry, take that cassette out and put the faster cassette in. That’s going to drive at a much higher speed.”
  — Julian Nebreda [00:14], [38:52]

• Grid vs. Self-Sufficiency:

  “If the utility sector doesn’t provide [power], they’ll figure out a way to provide it for themselves.”
  — Amy Myers Jaffe [00:33], [40:07]

• Changing Energy System Design:

  “Battery storage does not presupposes a specific source of generation… it completely changes the way we can think about electricity, about how we design electricity sectors.”
  — Julian Nebreda [21:10]

• Cold Weather Storage Myths:

  “Historically… during cold weather, batteries don’t work… but we have solutions in Finland—99% availability, no issues.”
  — Julian Nebreda [14:27]

• Regulatory Lag:

  “The regulator and even utility community hasn’t quite caught up to the potential of the technology.”
  — Amy Myers Jaffe [53:30]

Key Timestamps for Major Segments

• [00:00] – Amy on Texas and battery deployment boom
• [01:00] – Ed introduces episode focus: battery storage as hottest sector
• [02:34] – Julian Nebreda’s career path and view on public service in energy
• [05:48] – US market drivers: AI, manufacturing, extreme weather
• [10:05] – Battery role in extreme weather/peak demand
• [13:13] – Two daily peak demand cycles, batteries in Europe & NY
• [14:27] – Battery performance in deep cold climates
• [16:05] – Storage as complement to other generation, not replacement
• [25:07] – US battery storage market: 50% growth, possible short-term dip
• [28:04] – US domestic supply chain and China FEOC rules
• [35:46] – Can the US out-innovate/compete with China?
• [38:36] – Texas as a living case of storage-driven innovation
• [40:07] – Customers may go off-grid if utilities lag; grid still best
• [46:33] – Data center needs: new use cases for large-scale storage
• [50:00] – Stationary storage for power quality in AI data centers
• [54:55] – Puerto Rico: “Apagon,” distributed vs central grid strategies
• [59:21] – Mixed-solution approach for island resilience

Final Thoughts

This episode provides a fast-moving, nuanced look at the transformative role battery storage is playing as both a disruptor and enabler within the electric grid. The sector’s urgency, complexity, and dazzling growth (especially under the strains of weather and new digital demand) make batteries both a technical tool and a lever for broader system change. The episode ends with a call for flexible, system-level thinking and optimism in American innovation and adaptability.

For listeners who missed it, this summary captures industry context, practical deployment detail, and the high-level strategy debates shaping the future of the grid.