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ESS Tech Launches Major Arizona Battery Pilot Project

10/10/2025

22 3 Full Breakdown

Summary

Story summary

ESS Tech, Inc. (NYSE: GWH) and Salt River Project (SRP) announced a 5 MW/50 MWh pilot in Arizona named "Project New Horizon."
The project uses ESS's Energy Base iron-flow battery technology to power about 1,125 homes for 10 hours.
The agreement supports SRP's strategy to evaluate non-lithium storage technologies.
ESS's stock rose about 176% in pre-market trading.
Analysts maintain a Hold rating amid a substantial net loss and limited revenue.

History

Historical Context

In 2010, the U.S. government allocated $2.4 billion to advance battery technologies, aiming to improve energy storage solutions. This investment supported companies like ESS Tech, Inc., which developed iron-flow batteries capable of powering 1,125 homes for 10 hours. As energy demands rise, such innovations are crucial for transitioning to renewable energy and reducing reliance on traditional lithium batteries.

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Story summary

ESS Tech, Inc. (NYSE: GWH) and Salt River Project (SRP) announced a 5 MW/50 MWh pilot in Arizona named "Project New Horizon."
The project uses ESS's Energy Base iron-flow battery technology to power about 1,125 homes for 10 hours.
The agreement supports SRP's strategy to evaluate non-lithium storage technologies.
ESS's stock rose about 176% in pre-market trading.
Analysts maintain a Hold rating amid a substantial net loss and limited revenue.

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