Arvin Ganesan, CEO of Fourth Power, previously worked in the U.S. Senate, EPA, and Apple. He dives into the innovative thermal energy storage system using heated liquid tin. This technology offers rapid energy conversion and can bridge gaps in energy supply for renewables. Arvin discusses the challenges of current storage methods, the advantages of their approach over lithium-ion batteries, and the potential for revolutionizing electricity grids. He also shares insights on funding and the competitive landscape in climate technology.
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Choosing Fourth Power
Arvin was hesitant to accept the CEO role due to family commitments, but a meeting with Fourth Power's founder changed his mind.
This meeting, held at a Cheesecake Factory, demonstrated the founder's understanding of work-life balance.
insights INSIGHT
Focus on Electricity Storage
Fourth Power prioritizes electricity storage as a primary application for its thermal energy system, not industrial heat.
This focus stems from the rapidly growing demand for electricity, driven by trends like the increasing energy consumption of AI.
insights INSIGHT
Fourth Power's System Explained
Fourth Power is developing a 100-megawatt battery with a duration of 10-100 hours, addressing both short and long-duration storage needs.
The system resembles a football field within a warehouse and utilizes liquid tin heated to extreme temperatures.
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Arvin Ganesan is the CEO of Fourth Power, which is developing a flexible-duration thermal energy system designed to meet the needs of an electrical grid increasingly powered by renewables. Their system heats liquid tin to extremely high temperatures, circulates it through carbon blocks for heat storage, and converts that heat back to electricity on demand via thermal photovoltaics. The technology aims to address both short-duration energy storage (5–10 hours) and long-duration needs (100 hours or more), with the ability to discharge power within seconds.
At the end of last year, Fourth Power raised a Series A led by DCVC, with participation from Breakthrough Energy Ventures. Arvin’s fascinating career includes time in the U.S. Senate as a senior policy advisor to the late Senator Frank Lautenberg, over five years at the U.S. Environmental Protection Agency, and nearly six years at Apple as the head of global energy and environmental policy.
In this episode, we explore Arvin's career path, his decision to join Fourth Power, and why the company’s work matters for the future of energy storage.
In this episode, we cover:
[1:49] Arvin's career journey: From the EPA to Apple and beyond
[8:13] Why Arvin chose to become CEO of Fourth Power
[10:29] Focusing on electricity storage over industrial heat
[12:06] Fourth Power’s thermal energy storage system explained
[17:11] How Fourth Power uses photovoltaics for efficient energy conversion
[20:36] Trade-offs between Fourth Power's technology and lithium-ion batteries
[25:03] Co-location strategies and powering renewable energy
[28:21] Collaborating with utilities to meet grid demands
[31:09] Fourth Power’s milestones and current progress
[32:57] Arvin’s transition to a CEO role and what he’s learning
[34:59] Market optimism and the potential impact of Fourth Power’s solution
Inevitable