Bihar Batteries

www.biharbatteries.com ↗ ·San Sebastián ·Seed

Bihar Batteries is a Spanish deep-tech startup, founded in 2023 in Donostia-San Sebastián (Basque Country), that designs and manufactures sodium-ion batteries for stationary energy storage, targeting commercial and industrial customers. Its cells use abundant, non-critical raw materials (sodium from seawater, hard carbon from wood) developed with research center CIC energiGUNE, and the company is targeting commercialization in 2026 with a pilot cell manufacturing line planned for 2027 in Gipuzkoa.

Founded

2023

Founders

Total funds raised

€2.6M

SectorsEnergy Storage, Battery Technology, Climate Tech, Deeptech & Hardware Start-up MapEnergy & Climate › Batteries & EV charging

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Founders

Alberto Cendoya

CEO & Co-Founder

Sebastián Fernández-Medrano

COO & Co-Founder

Also at Komon →

Global models 5

Northvolt

Sweden · northvolt.com ↗

Europe's flagship battery-cell gigafactory manufacturer building large-scale battery production for energy storage and mobility, the same capital-intensive manufacturing model Bihar aims to scale into.

$9B+Comparable

Verkor

France · verkor.com ↗

French battery-cell gigafactory developer raising large amounts to build domestic European battery manufacturing capacity, mirroring Bihar's ambition to build a European sodium-ion gigafactory.

$3B+Comparable

Group14 Technologies

United States · group14.technology ↗

Next-generation battery materials manufacturer (silicon anode) aiming to displace incumbent lithium-ion chemistry with better-performing, more sustainable materials, similar to Bihar's next-gen chemistry play.

$1.16BComparable

Natron Energy

United States · natron.energy ↗

Direct sodium-ion (Prussian Blue) battery maker targeting stationary/industrial energy storage, the closest business-model match to Bihar Batteries globally.

$363MComparable

Altris

Sweden · altris.se ↗

European sodium-ion battery cell developer for stationary storage, the closest sodium-ion peer to Bihar Batteries in both geography and technology.

$41MComparable

In the same niche 27 others

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Notes: Most funded first

Investors 1

Earth (Earth Capital)

earth.now ↗

Investor United Kingdom

Funding rounds 2

Date	Round	Amount	Lead
2026-06-18	Seed (estimated)	€2M	Lead not disclosed
2024-01	Pre-seed (estimated)	€600K	Lead not disclosed

News 4

Open as list →

Published	Article
2026-06-18	Spain's Bihar Batteries targets sodium-ion pilot cell line by 2027 ↗ Energy Storage News 2026-06-18
2026-04-29	New partnership advances sodium-ion manufacturing in Spain ↗ Energy Storage News 2026-04-29
2025-11-06	Spanish start-up Bihar Batteries to commercialize sodium-ion batteries in 2026 ↗ pv magazine International 2025-11-06
2025-09-12	Bihar Batteries: "Las baterías de sodio pueden ayudar a reducir hasta en un 50% el coste energético de las empresas" ↗ SPRI 2025-09-12