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Elestor BV is a fast growing company, active in the development of industrial size storage systems for electricity, Elestor has matured HBr flow battery technology into a robust and highly scalable product, featuring storage costs far beyond what is achieved by existing storage technologies.
The technology does not only shift energy to times when no renewable energy is generated, but also enables trading on electricity markets and optimizes revenues. Furthermore, storage enables lower power grid connection, saving considerable costs. HBFB storage technology enables a combination of these revenue streams ('revenue stacking')
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9 Nov 2023

Promising Redox Flow Battery Chemistries for Stationary Energy Storage

Redox flow battery (RFB) installations are expected to increase over the next decade as demand for stationary energy storage technologies is expected to increase. This is due to potential Li-ion material supply shortages coming toward the end of the decade and increasing variable renewable energy (VRE) sources penetrating electricity grids, creating greater variability and uncertainty in energy supply.
22 Aug 2023


Elestor is a Dutch company developing a redox flow battery based on hydrogen bromine chemistry. This profile provides some updates on the company, since a full profile written in June 2023.
2 Jun 2023


Elestor are a Dutch company developing a redox flow battery based on the hydrogen bromine chemistry.
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24 Feb 2021

IDTechEx Overview of the Redox Flow Battery Market

Among the Li-ion batteries competitors, the Redox Flow Battery (RFB) system is one of the main competitors currently approaching the market.
21 Oct 2020

What's on the Energy Storage Market Beside Lithium-ion Batteries? Pt 2

In this second article from IDTechEx, a more detailed analysis about the different chemistries will show the main RFB technologies currently available or under development, beginning with the most adopted and investigated Redox Flow Batteries (RFB), the Vanadium Redox Flow Batteries (VRFB).
8 Sep 2020

Floading Brings Conversion of Europe's Largest Electric City Bus Order

Amersfoort-based electric charging infrastructure company Floading is bringing 130 electric buses to Hengelo where they will be adapted for use in The Netherlands.
7 May 2020

European Collaboration on Innovative Membrane-less Redox Flow Battery

The EU recently awarded €4Million to the MELODY consortium, to develop low cost, innovative batteries for large-scale energy storage, as part of the Horizon 2020 program 'Advanced Redox Flow Batteries for stationary energy storage.'
26 Mar 2020

Energy Experience Group Acquires NovaVolt

Koolen Industries' solar subsidiary Energy Experience Group has acquired solar panel installation company NovaVolt Solar Energy for more than 5 million euros.
20 Feb 2020


Elestor is a Dutch company developing Hydrogen/Bromine redox flow battery.
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7 Feb 2020

Smart Grid to Tackle Large-Scale Storage Needs

Koolen Industries has launched Smart Grid, a new energy storage company that will deliver integrated large-scale energy storage solutions, for its fast-growing international clients. These energy storage solutions will connect multiple batteries using smart software.
28 Jan 2020

Robotics Startup Aziobot Lands Koolen Industries Investment

Dutch clean energy conglomerate Koolen Industries has invested in Dutch robotics startup Aziobot to help fund an expansion of its team ahead of its introduction of autonomous cleaning robots to the market.
12 Nov 2019

Koolen Industries Invests Millions in Proton Ventures

Dutch clean energy conglomerate Koolen Industries has invested 4 million euros in Dutch ammonia energy storage company Proton Ventures.
19 Jul 2019

Koolen invests in hydrogen bromine flow battery maker Elestor

Koolen Industries has signed the agreement for a multi-million investment in the electricity storage company Elestor BV. After years of research and development, Elestor is at the verge of introducing its revolutionary hydrogen bromine flow battery to the market.
17 May 2018


Update from IDTechEx Show! Berlin 2018.
12 Apr 2018

HBr Flow Batteries Entering Scale Up Phase

EleStor, Netherlands
10 May 2017

Cost Leadership With HBr Flow Battery Technology

EleStor, Netherlands
9 Mar 2017

Energy Storage Innovations Europe 2017

The field of battery energy storage is set to grow significantly over the coming years. The question that incumbents, raw materials suppliers, end users, and innovators are all asking themselves is whether Li-ion batteries will keep the lion's share of the market, or whether disruptive innovation will drive technology diversification according to applications.
17 Feb 2017

Primus Power Corp

17 Feb 2017

Enstorage Inc

14 Dec 2016


EleStor is a Dutch company working on hydrogen-bromine redox flow batteries, which they hope can lowball the redox flow industry thanks to a levelised cost of energy of 0.05 €/kWh.
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