Episode 866

866: Are Batteries the New Substations? | Wärtsilä’s Bold Vision for Grid-Scale Storage

Published on: 21st October, 2025

Storage Isn’t Backup—It’s Infrastructure

Wildfires, heat waves, and AI-fueled data centers are pushing our grid to the edge. The question is no longer whether we need storage—it's whether we're going to unlock its full potential.

In this live episode from RE+, Nico is joined by two global leaders from Wärtsilä Energy—Tamara de Gruyter, President of Energy Storage, and David Hebert, VP of Global Sales & Strategy. Together, we  unpack the evolution of batteries from “nice toys” to essential grid infrastructure.

Tamara brings her international lens to the US market, highlighting both the growing sophistication of customers and the urgent need for flexible, software-driven solutions. Meanwhile, Dave draws on a decade of global storage deployments—from Australia to Saudi Arabia—to explain how the U.S. can broaden focus on revenue models, regulation, and system design.

Expect to learn:

🔹 Why grid operators now treat batteries like substations

🔹 How data centers and AI are changing the storage equation

🔹 What “virtual inertia” really means—and why it matters

🔹 How US developers can learn from global storage markets

If you want to understand how batteries are shaping the future of energy reliability, this episode delivers both vision and practical insight.

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About the Podcast

SunCast
Your resource for developing a clean energy or climate tech career
Nico Johnson takes you into conversations with those at the forefront of Renewable Energy.

SunCast gives an inside look into what is happening in renewable energy. From conversations with the biggest Solar Panel manufacturers in the world to the small startups creating the future of renewable energy, such as carbon capture and battery technology breakthroughs.

SunCast is dedicated to providing the knowledge, research, tools and expert guidance you need to understand, grow and be ahead of the curve in the fastest-growing markets in the world.

Featuring over 800 conversations, Nico has interviewed people from Tesla, SolarCity, Trina Solar, Meyer Burger, Conergy, SunEdison, Energy Vault and even the US Government... to name a few. Covering topics such as Solar Power, Wind Energy, Batteries, Electric Vehicles, Carbon Capture, Finance, Hydrogen, and more.

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...or view the full archive of SunCast episodes here: https://www.suncast.media/media/podcast