ELESTOR BV

Their core work

Elestor is a Dutch SME developing hydrogen-bromine redox-flow batteries for large-scale, low-cost energy storage. Their core technology uses hydrogen and bromine as active species in flow battery systems, targeting grid-scale and island energy applications. They contribute battery expertise to EU consortia focused on next-generation energy storage materials, island energy flexibility, and membraneless flow battery designs. Based in Arnhem, they operate at the intersection of electrochemistry, membrane technology, and energy system integration.

What they specialise in

How they've shifted over time

Elestor's early H2020 work (2017) centered on fundamental flow battery materials — membranes, sealing compounds, and electrochemistry for multiple battery chemistries (hydrogen-bromine, organic, zinc-air) through the FlowCamp training network. By 2019-2020, their focus shifted decisively toward application and deployment: island energy management (GIFT) and eliminating the membrane entirely to cut costs (MELODY). This trajectory shows a company moving from materials R&D toward market-ready, cost-optimized energy storage products.

Elestor is pushing toward commercially viable, membrane-free hydrogen-bromine storage — expect them to seek demonstration and scale-up partners next.

How they like to work

Elestor participates exclusively as a partner, never as coordinator, which is typical for a focused technology SME contributing specialized battery expertise to larger consortia. With 41 unique partners across 14 countries from just 3 projects, they operate in large, diverse consortia rather than tight bilateral arrangements. This suggests they are comfortable integrating their technology into multi-partner systems and are easy to plug into new consortia as a specialist contributor.

Elestor has built a broad European network of 41 partners across 14 countries through just three projects, reflecting participation in large Innovation Action and training network consortia. Their Netherlands base and wide geographic spread indicate strong pan-European connectivity.

What sets them apart

Elestor occupies a rare niche as an SME focused specifically on hydrogen-bromine flow battery technology — a chemistry that offers very low storage costs per kWh compared to lithium-ion or vanadium alternatives. Their progression toward membraneless designs signals serious commitment to cost reduction, which is the key barrier to grid-scale storage adoption. For consortium builders, they bring deep, focused expertise in a specific battery chemistry rather than generic energy storage knowledge.

Highlights from their portfolio

• MELODY
  Their largest project (€942K) targeting membraneless flow batteries — represents their most advanced and commercially relevant R&D direction.
• GIFT
  Demonstrates real-world application of their battery tech in island energy systems with virtual power plant integration.
• FlowCamp
  European training network covering multiple flow battery chemistries — shows Elestor's role in building the next generation of battery researchers.