European-Made Vanadium Electrolyte for Grid-Scale Storage
Essential chemistry for the energy transition.
About Vessolyte
Powering Tomorrow with Chemistry
Vessolyte is a specialized manufacturer of high-purity vanadium electrolyte solution, designed for use in vanadium redox flow batteries (VRFBs). The company is a proud member of Clever Synergy Investment Fund (CSIF) – a leading European investor in energy infrastructure, technology, and green transition projects.
Headquartered in Bulgaria, Vessolyte is currently developing one of the region’s most advanced production facilities in Kardzhali, strategically positioned to serve VRFB integrators, developers, and research institutions across Europe.
With CSIF’s extensive portfolio in renewables, energy storage, and battery manufacturing, Vessolyte benefits from unmatched industrial know-how, financial backing, and a vision for sustainable innovation.
Fully Miscible with Water
Battery-grade quality control (ICP, titration, pH, conductivity tests).
Why Choose Vessolyte?
European Origin
Made in the EU under REACH & ISO-compliant process
Electrochemically Balanced
Mixed valence for reversible reactions
Chemical Stability
Resistant to oxidation and precipitation under proper storage
Designed for
Long Life
Supports high cycle count and energy density in VRFBs
Bulk and Custom
Volumes
Flexible logistics for B2B and
R&D clients
Applications
Vessolyte’s Vanadium Electrolyte is Ideal for:
Grid-scale energy use
Vanadium electrolyte tailored for utility-scale storage systems supporting renewables, peak shaving, and grid reliability.
VRFB Manufacturers
High-purity solution designed for seamless integration into vanadium redox flow battery production lines.
Battery Integrators/EPCs
Optimized chemistry for turnkey deployment in large-scale energy projects and battery system engineering.
R&D & Labs
Laboratory-grade electrolyte ideal for scientific studies, material testing, and electrochemical performance research.
Safety & Handling Declaration
General
Statement
Vessolyte vanadium electrolyte is non-flammable, chemically stable under recommended conditions, and manufactured in full compliance with EU regulatory frameworks including REACH and CLP. While safe when handled properly, the solution is classified as corrosive and requires care in transport, storage, and application.
All containers are delivered sealed, certified, and labeled according to EU hazardous materials transport regulations.
Appropriate PPE (Personal Protective Equipment) must be used during handling and transfer operations.
We strongly recommend following the guidelines below based on your use case.
Universal Safety Notes
- Non-flammable. Not a combustion hazard.
- Shelf life: 1–2 years (sealed, 10–25°C)
- SDS and handling certificate available on request
Recommended
Handling Guidelines
Grid-Scale Energy Use
Use enclosed pumping systems when transferring large volumes
Place electrolyte tanks on chemically resistant containment surfaces
Regularly inspect for corrosion or seal degradation
Ensure staff is trained in chemical spill response
VRFB Manufacturers
Integrate filling operations in ventilated, closed-loop environments
Calibrate dosing systems for 1.7 mol/L concentration and 3.5 valence
Prevent contamination from incompatible metals or cleaning agents
Document batch numbers for traceability and warranty claims
Battery Integrators & EPCs
Transport only in certified ADR containers for corrosive liquids
Avoid exposure to air during extended system commissioning
Ensure compatibility of piping, seals, and tanks with acidic solutions
Plan for neutralization/containment in case of spillage
R&D & Labs
Store small quantities in glass or HDPE lab bottles
Label with CAS numbers and hazard codes (H290, H302)
Work under chemical fume hood during preparation
Avoid prolonged exposure to air to maintain redox balance