Spearmint Energy Secures $450M Financing for 600 MWh Texas Battery Project — Spearmint Energy

Event summary

Spearmint Energy closed $450M in financing for its 300 MW/600 MWh Red Egret battery project in Texas City, Texas.
The financing package includes $225M in construction debt, $96M in preferred equity from Nuveen, and $126M from an ITC transfer.
Construction began in May 2026, with completion expected in 2027.
The project is the fourth built by M.A. Mortenson for Spearmint and uses Sungrow's PowerTitan platform.
Upon completion, Spearmint's operating portfolio will exceed 1.5 GWh across four projects.

The big picture

Spearmint Energy's $450M financing for the Red Egret project underscores the growing investment in battery storage to address grid reliability challenges in ERCOT. The deal reflects broader industry trends of increasing capital deployment in energy storage solutions to support renewable integration and grid stability. With this project, Spearmint is positioning itself as a key player in Texas' energy transition, leveraging strategic partnerships and innovative financing structures to scale its portfolio.

What we're watching

Execution Risk: Whether Spearmint can deliver the Red Egret project on time and within budget, given the scale of the financing and construction timeline.
Market Dynamics: How ERCOT's growing electricity demand and aging grid infrastructure will impact the project's operational performance and revenue potential.
Competitive Positioning: The pace at which Spearmint can expand its portfolio to maintain its leadership position in the Texas battery storage market.