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The Global Tank Storage Success Stories with Kemiwatt

By Muhammad Zubair, Head of Development
KEMIWATT
 
KEMIWATT is positioned at the intersection of energy storage innovation and tank storage infrastructure by addressing one of the most critical constraints in the energy transition: the lack of scalable, long-duration electricity storage. Through strategic partnerships within the tank storage sector, the company is transforming conventional tank storage assets into grid-supporting mega batteries. Backed by investors such as Stolt Ventures and Impact Ocean Capital, KEMIWATT is executing a focused growth strategy that combines technological advancement with rapid deployment across key European markets.
 
  • Category: Environmental Performance focus: Repurposing tank storage into long-duration “mega-batteries”
 
kemiwatt muhammad zubair

What was the KEMIWATT project?

KEMIWATT has developed an advanced organic redox flow battery technology designed for large-scale, long-duration energy storage using safe and sustainable materials. A key differentiator is the ability to repurpose existing fixed storage tanks into “mega-batteries”, fundamentally shifting the economics of storage deployment by leveraging already-installed infrastructure. This significantly reduces capital expenditure and accelerates implementation timelines compared to alternative systems.
 
By converting traditional tank storage assets into batteries, terminal operators can transform underutilised infrastructure with minimal modifications into active components of the future energy system, optimising asset utilisation while enabling participation in energy markets. In parallel, KEMIWATT offers modular solutions ranging from fully integrated containerised systems to flexible ISO tank-based configurations, ensuring scalability across both large industrial installations and distributed or mobile applications.
 

What challenge did KEMIWATT address?

The EU’s energy transition is constrained by grid congestion, slow infrastructure expansion and renewable intermittency. FuelEU Maritime regulation requires shore power by 2030, yet ports have achieved only around 20% of the electrification needed to meet this target. At the same time, ports and tank terminals face declining fossil asset utilisation while struggling to electrify operations.
 
This creates a structural mismatch: rising demand for flexible, reliable energy storage, but limited scalable, rapidly deployable solutions suited for complex industrial environments. KEMIWATT addresses this gap by integrating long-duration energy storage into existing infrastructure, reducing grid dependence while enabling renewable integration and industrial electrification. This approach improves resilience and unlocks value from underutilised infrastructure assets locally.
 

What solution did KEMIWATT implement?

KEMIWATT’s core solution is an organic redox flow battery platform that:
  • Uses safe, non-flammable, non-explosive, non-corrosive organic materials.
  • Repurposes existing fixed storage tanks into large-scale “mega-batteries”, drastically improving the economics of deployment.
  • Enables tank terminals to transform traditional assets into flexible energy storage and grid-supporting infrastructure with minimal modifications.
  • Is offered in modular formats, including containerised systems and ISO tank-based configurations, allowing tailored solutions for ports, terminals and industrial sites.
 
KEMIWATT is collaborating with ports, tank terminal operators and grid stakeholders to deploy its flagship project, creating a replicable technical and commercial model for rapid adoption across European ports, starting with the Netherlands, Germany and France.

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success stories 3

What made this solution different?

KEMIWATT’s solution stands out by combining economic, operational and environmental advantages:
  • Cost and scalability – The flow battery architecture separates power and energy components, allowing cost-efficient scaling for long-duration applications. Leveraging existing tank infrastructure further reduces capital expenditure and speeds up deployment.
  • Superior safety profile – The system uses non-flammable, non-explosive, non-corrosive organic materials, eliminating thermal runaway risks associated with lithium-ion and simplifying permitting in dense industrial and port environments.
  • Sustainable and resilient supply chains – The technology is fully metal-free, avoiding rare and critical raw materials. After approximately 20 years of operation, the electrolyte can be recycled, with around 70% of the original active chemistry recovered and reused to manufacture a new battery.
  • Operational performance – The technology offers up to 1 000 cycles per year with minimal degradation over a 20-year lifespan, enabling applications such as shore power, behind-the-meter optimisation, grid congestion relief and energy arbitrage.
 
Taken together, these advantages position KEMIWATT not just as an alternative technology, but as a structurally more suitable solution for large-scale industrial and port applications.
 

What impact did KEMIWATT achieve?

Since 2014, KEMIWATT has validated its organic flow battery technology through over a decade of R&D, including some of the world’s first organic flow battery prototypes and subsequent large-scale demonstrations, gaining recognition through innovation awards.
 
Its PFAS-free system delivers a CO₂ footprint around 17% lower than vanadium flow batteries and 52% lower than lithium-ion alternatives, supporting the sustainability goals of ports and terminals. In 2025, the company secured investment from Stolt-Nielsen and Impact Ocean Capital, underpinning its growth strategy. It is currently deploying a 500 kWh project in the Netherlands and preparing a 30× scale-up, enabling tank terminals to shift toward energy storage and port electrification at scale.
 

What were the key highlights and recognition?

The most significant highlight is demonstrating that existing tank storage infrastructure can be repurposed into large-scale battery systems, effectively bridging the gap between legacy industrial assets and future energy needs. This validates both the technical feasibility of organic flow battery technology at scale and a viable economic pathway for infrastructure reuse.
 
In parallel, strong investor backing and the transition from demonstration to commercial deployment confirm market confidence in the solution. Together, these milestones show that KEMIWATT’s approach is innovative, practical, scalable and aligned with the transformation needs of the tank storage and port industries.
 

What is next for this technology?

KEMIWATT’s technology has the potential to redefine the role of tank storage in the future energy system. Repurposing even a small fraction (around 4%) of existing European tank capacity could unlock roughly 42 GWh of energy storage, creating a distributed network of large-scale “mega-batteries”.
 
Beyond ports, the solution is adaptable to urban environments, data centres, microgrids and industrial clusters facing grid constraints. Its modular, transportable design enables energy to be stored in regions rich in renewables and relocated to areas with limited grid capacity. This strengthens grid stability, supports renewable integration and enhances Europe’s energy independence, contributing to resilient, flexible and future-proof energy systems.
 

Want to find out more?

To learn more about KEMIWATT and its organic flow battery solutions, you can contact:
 
Muhammad Zubair, Head of Development
Phone: +31 614 356 7264
Email: mzr@kemiwatt.com
Website: www.kemiwatt.com

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