Invinity Energy Systems (LSE:IES) has won its largest contract to date after securing an order for 43 MWh of vanadium flow battery systems from Dairyland Power Cooperative. The batteries will be deployed across several long-duration energy storage sites in the U.S. Midwest, where they are expected to improve grid resilience and reliability for customers across Dairyland’s predominantly rural electricity network.
The order will be supplied using Invinity’s Endurium battery technology, with deliveries scheduled to begin during the second half of 2027.
DOE-Backed Project Strengthens U.S. Presence
The project forms part of the REVIVE programme, which is supported by the U.S. Department of Energy and is designed to accelerate the deployment of long-duration energy storage technologies.
Management said the contract reflects increasing demand for energy storage systems capable of frequent deep cycling and long operational lifespans. The agreement also builds on Invinity’s recent commercial progress in the United States, following previous projects in California and Wisconsin, while further strengthening its order book and supporting its U.S. manufacturing strategy.
Long-Duration Storage Market Continues to Expand
The Dairyland Power agreement reinforces Invinity’s position in the growing market for utility-scale energy storage, where vanadium flow batteries are increasingly being adopted as an alternative to lithium-ion technology for applications requiring long operating lives and high durability.
The company believes continued investment in renewable energy infrastructure and grid modernisation will create further opportunities for its technology across North America and other international markets.
Profitability Remains the Key Challenge
Despite growing commercial momentum, Invinity continues to face financial challenges, including ongoing operating losses, negative profit margins and significant cash outflows. The company’s relatively low debt levels provide some financial flexibility, but achieving sustainable profitability remains a key objective.
Technical indicators also remain weak, with the shares trading below major moving averages and a negative MACD signalling continued bearish momentum, although oversold conditions may provide scope for a recovery. Management highlighted improving order intake, lower operating costs and a healthy liquidity position, but successful execution and stronger cash generation remain critical to the company’s longer-term outlook.
About Invinity Energy Systems
Invinity Energy Systems is a manufacturer of vanadium flow batteries for long-duration energy storage, with operations in the UK and Canada. Its Endurium battery systems are designed to provide a safer, longer-lasting alternative to lithium-ion technology, supporting heavy-duty applications over operating lives of up to 30 years.
The company’s products help utilities and energy providers improve grid stability, increase renewable energy integration and deliver reliable long-duration electricity storage for commercial and utility-scale projects worldwide.
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