Startup roundup: $60 million for UK battery maker, €15 million for Danish optimizer

UK battery startup Nyobolt has raised $60 million in a Series C funding round led by Symbotic, an AI-enabled robotics technology company, bringing the company’s value to $1 billion.

Nyobolt was spun out from Cambridge University in 2019 as a startup with proprietary anode materials and a business proposition built around fast charging. In addition to battery products for grid-scale energy storage and EVs, the company has targeted AI-enabled robotics technology as a viable market for its technology.

New investment in Nyobolt comes as the startup prepares to supply a large-scale off-grid data center in India. Nyobolt has signed a memorandum of understanding with the state of Rajasthan to deliver more than 100 MW of off-grid AI data centers and power management infrastructure.

The Rajasthan deal is the first in what Nyobolt said it expects will be many in India – the company said it will focus on delivering renewable energy integration and grid-independent energy storage across multiple Indian states.

Sai Shivareddy, co-founder and CEO of Nyobolt said the company’s technology enables “the always-on, always-moving infrastructure that physical AI demands.”

“The enterprises deploying autonomous systems at scale can’t afford downtime, swap time, or power flickers. Out technology delivers a powerful trifecta: improved performance, exceptional durability, and a more sustainable operation, enabling a new generation of machines to run harder and smarter,” Shivareddy said.

In addition to its proprietary battery tech, Nyobolt also has its own in-house battery management systems, power electronics and software. Nyobolt’s previous Series A and Series B funding rounds secured a combined total of $60 million.

Trading places

Danish optimizer and electricity supplier Reel has also completed a successful fundraising round, with €15 million ($17 million) secured ahead of planned expansion in the German market.

Reel offers optimization services for battery storage and solar, as well as energy trading services for business customers.

The startup has been working with business clients in Denmark since 2023, as well as energy producers such as Eurowind Energy, Momentum Energy Group and Green Wind. In February 2026, Reel announced a deal to balance and optimize Denmark’s Vandel III project, a co-located installation with 60 MW battery energy storage system (BESS) and a 162 MW solar park.  

Anders Meldgaard, CCO at Reel, said the startup offers businesses predictable electricity costs, and gives energy producers better returns on their renewable energy assets.

“When both sides of the market work, new renewable energy projects get built – and that’s what moves the energy transition forward.”

The €15 million ($17 million) Series A fund raising round was led by Future Energy Ventures, a Berlin-based venture capital company. They were joined by existing investors UVC Partners, Transition, The Footprint Firm and angel investors.

Following the fund-raising success, Reel plans to increase its presence in the German market. The startup already offers balancing services for renewable energy producers in Germany, including Blue Elephant Energy and Greenwind. The new funds will be used to “refine our products” grow the company’s portfolio and build a commercial team in Germany, according to Reel.

Ohad Mamann, investment partner at Future Energy Ventures, commented on the investment. “Germany is the defining energy market of this decade – the scale of transition required is enormous, and the window to get it right is narrow. Reel has built something rare: a model that makes renewable energy profitable for producers, predictable for businesses, and manageable for the grid.

“That’s what Germany needs right now, and why we backed Reel,” Mamann said.