SMP 277: Energy Storage Explained: From Lithium-Ion to the Future of the Power Grid

Episode Summary: In this episode of the Solar Maverick Podcast, Benoy Thanjan sits down with Marek Kubik, energy storage expert and former Fluence founder, to break down the rapid evolution of battery storage and its critical role in the energy transition. Marek shares insights from nearly two decades in the industry, explaining how declining costs, technological advancements, and new use cases are pushing energy storage to the center of the modern grid. From lithium-ion dominance to emerging technologies like sodium-ion, and from grid stability to long-duration storage, this conversation covers the trends shaping the future of energy.   Biographies Benoy Thanjan Benoy Thanjan is the Founder and CEO of Reneu Energy, solar developer and consulting firm, and a strategic advisor to multiple cleantech startups. Over his career, Benoy has developed over 100 MWs of solar projects across the U.S., helped launch the first residential solar tax equity funds at Tesla, and brokered $45 million in Renewable Energy Credits (“REC”) transactions. Prior to founding Reneu Energy, Benoy was the Environmental Commodities Trader in Tesla’s Project Finance Group, where he managed one of the largest environmental commodities portfolios. He originated REC trades and co-developed a monetization and hedging strategy with senior leadership to enter the East Coast market. As Vice President at Vanguard Energy Partners, Benoy crafted project finance solutions for commercial-scale solar portfolios. His role at Ridgewood Renewable Power, a private equity fund with 125 MWs of U.S. renewable assets, involved evaluating investment opportunities and maximizing returns. He also played a key role in the sale of the firm’s renewable portfolio. Earlier in his career, Benoy worked in Energy Structured Finance at Deloitte & Touche and Financial Advisory Services at Ernst & Young, following an internship on the trading floor at D.E. Shaw & Co., a multi billion dollar hedge fund. Benoy holds an MBA in Finance from Rutgers University and a BS in Finance and Economics from NYU Stern, where he was an Alumni Scholar.   Marek Kubik Marek builds and scales deeptech businesses that accelerate the clean energy transition. Over the past 17+ years he has helped take grid‑scale energy storage from first‑of‑a‑kind projects to multi‑billion‑dollar platforms, and enabled giga‑scale renewable systems. As part of the founding team at Fluence, now one of the world’s largest energy storage technology providers, he helped to establish the business and drive scale-up - through to unicorn, a $4.7bn IPO and beyond. As Managing Director, he led the Western Europe & Middle East sales organisation, cultivating strategic partnerships, building high-performing teams and transacting over $1bn in energy storage solutions. Today, Marek serves as a flexibility leadership team member at ENOWA, the clean energy and water company of NEOM, where he leads all efforts related to energy storage - a cornerstone of NEOM's ambition to achieve the world's first at-scale 100% renewable power grid. Earlier in my career, he helped develop Europe’s first commercial utility‑scale battery project, building directly on my doctoral research and giving me a front‑row seat to the rise of modern battery storage. That mix of technical grounding and commercial execution still shapes how Marek works with teams, investors and policymakers today. He is also a recognised voice in the sector: a Forbes 30 Under 30 honouree that's delivered ~500 speaking engagements (TEDx, UN, COP, One Young World, Oxford University), grown a 50,000+ (top 0.002%) following on LinkedIn and authored the seminal Volta Foundation Battery Report (100,000+ downloads). Marek uses my platform to demystify energy storage, highlight emerging technologies and explore how AI and data can reshape clean energy systems. Alongside his corporate roles, Marek advises governments, infrastructure investors and technology startups on strategy, commercialisation and scale‑up execution - helping bridge the gap between promising innovation and bankable, real‑world projects.   Stay Connected: Benoy Thanjan Email: info@reneuenergy.com  LinkedIn: Benoy Thanjan Website: https://www.reneuenergy.com Website: https://www.solarmaverickpodcast.com/   Marek Kubik Linkedin:  https://www.linkedin.com/in/mlkubik/ Solar Maverick Podcast Updates In this episode, Benoy Thanjan shares key updates with the Solar Maverick community, including upcoming events, speaking engagements, and ways to stay connected. Benoy is hosting the Summer Solstic