Summary:Bridge Green and Hartree have signed an eight-year lithium agreement, establishing a long-term supply relationship that links upstream lithium production with downstream battery material demand. The multi-year deal provides Bridge Green with committed offtake volume and revenue visibility, while Har...

Bridge Green and Hartree have signed an eight-year lithium agreement, establishing a long-term supply relationship that links upstream lithium production with downstream battery material demand. The multi-year deal provides Bridge Green with committed offtake volume and revenue visibility, while Hartree secures a stable source of lithium feedstock for its battery material processing network. The agreement reflects a broader industry trend toward multi-year lithium supply contracts as both producers and processors seek to de-risk their positions in a volatile commodity market.

Lithium mine and processing facility with stockpiled spodumene concentrate

The eight-year lithium agreement covers the supply of spodumene concentrate from Bridge Green's Australian lithium project to Hartree's downstream processing facilities. Contract volumes are structured on a ramp-up schedule, starting from initial production and scaling as the mine reaches design capacity. Pricing mechanisms include both fixed and floating components, balancing producer price protection with exposure to prevailing lithium market indices. This hybrid pricing approach has become standard in recent lithium offtake deals, as neither party wants full exposure to extreme price swings.

For Bridge Green, securing an eight-year offtake agreement is a critical milestone. It provides the revenue certainty needed to finalize project financing, confirm reserve estimates and advance construction schedules. Lenders and equity investors typically require demonstrated offtake before committing capital to greenfield lithium projects. With Hartree as an anchor off-taker, Bridge Green can now engage with project finance institutions with a stronger commercial foundation.

For Hartree, the eight-year lithium agreement supports its downstream processing expansion. Battery material refiners are increasingly locking in multi-year feedstock contracts to match the multi-year offtake commitments they have made to electric vehicle manufacturers and cathode producers. Securing spodumene supply eight years into the future reduces the risk of feedstock shortages as processing capacity comes online. This vertical alignment between mining and refining is a defining feature of the modern lithium supply chain.

The deal also carries geographic significance. Australia continues to dominate global hard-rock lithium supply, and long-term contracts between Australian producers and international processing groups reinforce the country's position as a reliable lithium supplier. Bridge Green's project benefits from Western Australia's established mining infrastructure, skilled workforce and established export logistics.

Industry observers note that the eight-year duration is notable. Most lithium offtake agreements signed in recent years have ranged from three to five years, reflecting uncertainty about lithium demand timing and price trajectory. An eight-year term signals both parties' confidence in long-term lithium demand growth and their willingness to commit through multiple commodity cycles. This longer contract horizon is particularly relevant as the energy transition accelerates and battery demand becomes increasingly structural rather than cyclical.

The agreement is subject to customary conditions, including final project investment decision, environmental approvals and completion of definitive documentation. First spodumene deliveries are expected to commence following project commissioning, which is targeted within the next construction window. Bridge Green has indicated it will provide further updates as project financing and engineering studies advance.

For investors and industry stakeholders, the Bridge Green–Hartree lithium agreement demonstrates that structured, long-term supply deals remain viable despite near-term lithium price softness. The market is rewarding projects that combine credible offtake, competitive cost curves and clear development pathways. As more of these agreements are signed, the global lithium supply chain becomes more predictable and better positioned to support the energy transition over the coming decade.

The eight-year lithium agreement between Bridge Green and Hartree is more than a commercial supply contract — it is a structural commitment that aligns upstream production with downstream battery material demand over a full commodity cycle. For Bridge Green, it unlocks project finance and de-risks development. For Hartree, it secures critical feedstock for processing expansion. Long-term lithium offtake agreements of this duration will remain essential infrastructure as the world scales battery production and the energy transition demands reliable critical mineral supply.