Will Tope, CEO of LiNa Energy.
September 2, 2026

Episode 31: Will Tope (LiNa Energy) - Building Grid-Scale Batteries from Salt

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Episode summary

Will Tope, CEO of LiNa Energy, discusses low-cost sodium batteries and how deep tech companies find product-market fit on Episode 31 of Scaling Green Tech, a podcast by Adopter.

Tope explains that LiNa Energy did not invent a new chemistry. The company revived the ZEBRA battery, a sodium-based design from the 1980s that is inherently safe and heat-tolerant but historically too expensive to manufacture. LiNa's contribution is the electrolyte: a ceramic component that once had to be baked slowly in thick tubes, now re-engineered as a thin layer around 60 microns thick and produced through a faster, lower-energy process. That change brings the battery cost close to the price of its abundant raw materials. It positions salt batteries as a low-cost option for long-duration storage in hot markets such as India and the Middle East, where lithium-ion systems struggle.

This episode is relevant for energy storage founders, deep tech CEOs, grid infrastructure investors, and commercial leaders working on go-to-market strategy, business development in long sales cycles, and marketing for hard tech companies.

Guest profile

Will Tope is the CEO of LiNa Energy. He trained as a chemical engineer and began his career as a process engineer at the Fawley Refinery near Southampton. He then spent over ten years on the commercial side of oil and gas, covering energy origination and mergers and acquisitions, including sell-side work in Aberdeen and buy-side work in the United States. Towards the end of that period, he was chief of staff for a new trading group at ExxonMobil, where a focus on power first led him to grid-scale batteries. He joined LiNa Energy in 2021 and later stepped up to CEO.

LiNa Energy is a Lancaster-based company developing solid-state sodium batteries, also described as salt batteries, for long-duration and grid-scale energy storage. The company runs two laboratories and a pilot manufacturing site in Lancaster, and has run pilot projects in India with Tata and testing in the Middle East. Its technology targets hot climates, where conventional lithium-ion systems carry higher real-world cost.

Company website: LiNa Energy.

Find Will Tope on LinkedIn

Key takeaways

  • LiNa Energy did not create a new battery chemistry. According to Will Tope, the company revived the ZEBRA battery from the 1980s, a sodium-based design that is inherently safe, long-lasting, and built from cheap, abundant raw materials.
  • The historic barrier to the ZEBRA battery was its electrolyte, a thick ceramic tube that had to be heated slowly to avoid cracking. Tope says LiNa replaced it with a thin electrolyte, roughly 60 microns thick, which removed most of the manufacturing energy and cost.
  • Product-market fit sits in hot climates. Tope explains that near the equator a lithium-ion system runs its liquid cooling around the clock to counter ambient heat. He compares this to running a refrigerator with the door open, and says it raises the true cost of lithium-ion in those markets.
  • Tope frames early deals as long-term business development relationships lasting 10 to 20 years, not commission-based sales. He cites advice from LiNa co-founder Gene Lewis not to "blow up the balloon too fast" by building a pipeline beyond what the technology can deliver.
  • Tope treats two full-time marketing hires at seed or pre-Series A as a warning sign for a hard tech company, preferring external marketing support alongside a commercially minded CEO acting as the company's "external eyes."
  • Most of LiNa's commercial relationships began as inbound interest. Tope reads this as a signal that outbound effort could open a far larger pipeline across India, the Middle East, Latin America, Australia, Asia, and the United States.

topics covered

  • Explaining LiNa Energy and salt batteries to a five-year-old
  • The elevator pitch and reviving the 1980s ZEBRA chemistry
  • The electrolyte bottleneck and why the old design was expensive
  • Manufacturing the thin ceramic electrolyte
  • From individual cells to container-scale battery systems
  • Commercialisation stages and the Lancaster pilot manufacturing line
  • From oil and gas at ExxonMobil to climate founder
  • Business development versus sales in deep tech
  • Escaping the pilot graveyard
  • Finding product-market fit in hot markets: India and the Middle East
  • Customer signals versus investor advice on data centres
  • Marketing, "external eyes," and what is next for LiNa Energy

Frequently asked questions

What is a salt battery?
What is the ZEBRA battery?
Why do lithium-ion batteries struggle in hot climates?
How does LiNa Energy make sodium batteries cheaper than earlier designs?
What is the "pilot graveyard" in deep tech commercialisation?
Should an early-stage deep tech startup hire a full-time marketing team?

About Scaling Green-Tech

Scaling Green-Tech by Adopter is a podcast for people shaping the future of climate technology - founders, investors, and ecosystem leaders at the forefront of adaptation and resilience solutions. As part of Adopter’s mission to accelerate the adoption of high-impact climate innovation, the podcast aims to amplify real voices and practical insights that can help others navigate the startup journey. These conversations go beyond the hype to bring real, unfiltered stories - the wins, the roadblocks and everything you need to know in between.

Read the full transcript here
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