VSUN Energy

What VSUN Energy does

VSUN Energy is a Perth-based, privately held subsidiary of Australian Vanadium Limited (ASX: AVL) that develops and deploys vanadium flow battery (VFB) systems for large-scale renewable energy storage. The company's technology uses vanadium ions in different oxidation states stored in two electrolyte tanks and pumped through electrochemical cells, with key claimed attributes including a 25+ year lifespan, 100% depth of discharge with no capacity loss, non-flammable operation, indefinite electrolyte reusability, and modular scalability from kilowatts to megawatts. Target applications span utility/grid operators, commercial and industrial facilities, telecommunications, electric vehicle charging, off-grid, and residential use cases, with reference deployments in Western Australia, New South Wales, South Australia, Germany, and the Netherlands.

VSUN Energy operates a B2B enterprise sales model, engaging directly with utilities, telecommunications providers, industrial customers, and government entities through project-based consultations and custom solutions. Pricing is custom and not publicly disclosed, and the company supports a multi-year contract cadence. The company's go-to-market historically relied on direct enterprise sales backed by case studies and downloadable brochures, but its most strategically significant move is the exclusive partnership with Sumitomo Electric Industries announced February 2026 to jointly bid on the Western Australian government's 500MWh vanadium flow battery energy storage project in Kalgoorlie, which carries up to AU$150 million in government investment. Revenue, headcount, and funding data are not disclosed in the available sources.

Name

VSUN Energy

Legal name

VSUN ENERGY PTY LTD

Website

https://vsunenergy.com.au

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

VSUN Energy is a Perth-based subsidiary of Australian Vanadium Limited (ASX: AVL) that develops and deploys vanadium flow battery systems for large-scale renewable energy storage, serving utilities, telecoms, industrial, and government customers through direct enterprise sales and the Sumitomo Electric partnership.

Ownership category

akta.pro rank

Product category

Vanadium Flow Battery Energy Storage Systems

NAICS

Battery Manufacturing (33591)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Utility-Scale BESS Project Development & Ownership (IPP/Developer) (EUAFAAAA)

Keywords

• Vanadium flow batteries
• Renewable energy storage
• Long duration battery storage
• Grid scale energy storage
• Commercial battery systems

Headquarters

HQ city

Perth

HQ country

Australia

HQ region

Oceania

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Vanadium Flow Battery Systems: Sale and deployment of VFB systems for large-scale energy storage applications including utility, commercial, industrial, and off-grid solutions.
2. Energy Storage Solutions and Consulting: Custom energy storage project consultation and solution design services for telecommunications, utilities, and industrial applications.
3. Government Energy Storage Projects: Partnership with Sumitomo Electric to bid on Western Australian government's 500MWh vanadium flow battery energy storage project in Kalgoorlie, representing potential major infrastructure contracts.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

VSUN Energy designs, sells and deploys vanadium flow battery (VFB) systems for large-scale, long-duration renewable energy storage. The offering includes VFB units and ancillary inverters, sold as custom project-based solutions to utilities, telecommunications providers, industrial and commercial operators, government entities, and residential customers. Revenue is generated primarily through hardware sales and custom energy storage project consultations, with deployments ranging from kilowatt to megawatt scale.

Product overview

VSUN Energy is a subsidiary of Australian Vanadium Limited (ASX: AVL) offering a portfolio centered on Vanadium Flow Battery (VFB) technology for large-scale renewable energy storage. The core product is the VFB system, complemented by inverter products. The VFB technology employs vanadium ions in different oxidation states to store chemical potential energy, using vanadium pentoxide processed into electrolyte solution stored in two tanks and pumped through electrochemical cells. The company provides solutions across multiple applications including utility/microgrid, commercial & industrial, electric vehicles, telecommunications, battery backup, off-grid solutions, solar, and residential sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Vanadium Flow Batteries (VFB) Vanadium flow battery systems for large-scale, long-duration renewable energy storage. The VFB employs vanadium ions in different oxidation states to store chemical potential energy, with vanadium pentoxide (V2O5) processed into an electrolyte solution stored in two tanks and pumped through electrochemical cells. Modules are sold to utilities, commercial and industrial operators, telecommunications providers, EV charging operators, government entities, and residential customers at scales from kilowatts to megawatts.
• Inverters (CleanVerter 10-30 TL) Inverter hardware sold alongside VFB systems, representing the interface between the battery storage system and electrical energy sources/users. Used by enterprise and commercial customers integrating VFB storage into existing or new electrical systems.

Quantifiable outcome

• Lifespan of over 25 years with minimal degradation
• +2 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Sumitomo Electric IndustriescoreStrategic or Co-development Partner · 17 February 2026Australian Vanadium Limited, through its subsidiary VSUN Energy, entered an exclusive partnership with Sumitomo Electric Industries to jointly bid on the Western Australian government's 500MWh vanadium flow battery energy storage project in Kalgoorlie. The project carries up to AU$150 million in government investment as part of Western Australia's long-duration energy storage strategy. Australian Vanadium submitted its Stage One expression of interest on January 30, 2026, with Stage Two bidding scheduled to commence in March 2026 and preferred proponent negotiations expected in June 2026.

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Saft (TotalEnergies): Industrial battery manufacturer (owned by TotalEnergies) supplying energy storage solutions for grid, C&I, and telecom applications. Comparable end-market exposure including telecom backup where VSUN also targets deployments.
• Fluence Energy: Major grid-scale battery storage provider (Li-ion focused) with deep utility relationships and global deployment pipeline. Competes with VSUN on the same utility-scale tenders but with greater scale, lower cost, and broader technology partnerships.
• Tesla Energy: Largest stationary battery storage provider globally via Megapack/Powerpack products. Dominant supplier to utility-scale and C&I energy storage tenders, representing the principal incumbent VSUN competes against for commercial contracts.
• Dalian Rongke Power: Largest VFB manufacturer globally, having deployed the world's biggest vanadium flow battery projects (>100MWh) in China. Significantly larger scale and longer operational track record than VSUN, competing in utility-scale tenders.

Direct peers

• VRB Energy: Pure-play vanadium redox flow battery manufacturer with utility-scale deployments across China, Africa, and North America. Competes head-to-head with VSUN on long-duration grid storage using the same core VFB chemistry.
• Sumitomo Electric Industries: Japanese industrial conglomerate with a leading vanadium redox flow battery business and VSUN's exclusive bidding partner on the Kalgoorlie 500MWh project. Both a partner and a competitor in VFB technology globally.
• Invinity Energy Systems: Listed UK/Canadian vanadium flow battery manufacturer targeting utility-scale and commercial energy storage. Direct competitor in VFB technology with overlapping customer segments (utilities, microgrids, C&I) and similar long-duration value proposition.
• CellCube Energy Storage (Enerox): Austrian-based VFB manufacturer offering utility-scale and commercial vanadium flow battery systems. Directly comparable product line (referenced in VSUN's marketing materials via Enerox Company Presentation) and competes in the same European and Australian markets.

Emerging players

• Largo Clean Energy: Vanadium producer with VFB division leveraging its own V2O5 supply for energy storage projects in North America and Europe. Closely parallels AVL/VSUN's vertical-integration model of mine-to-battery.
• Bushveld Energy: Subsidiary of vanadium producer Bushveld Minerals focused on VFB deployment across Africa using vertically integrated electrolyte supply. Comparable business model of combining vanadium mining with VFB system integration for emerging-market energy storage.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/vsunptyltd
• Facebookfacebook.com/vsunenergy

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about VSUN Energy