Spearmint Energy

Spearmint Energy is a Miami, Florida-headquartered energy company specializing in the development, ownership, operation, and optimization of battery energy storage systems (BESS). The company's mission is to enhance grid stability, ensure reliable energy delivery, and promote efficient energy use to reduce costs and support energy independence, thereby addressing grid volatility and increasing system resiliency.

Spearmint Energy's core offerings include utility-scale battery and solar project development, energy storage offtake, and renewables power trading. Through its subsidiary, Spearmint Renewable Energy Services IM, LLC (SRES), it also provides asset management and revenue optimization for grid-scale battery storage developers, leveraging in-house expertise in data science, fundamental research, and asset operations. The company primarily targets the North American market, with significant operations and projects in Texas (ERCOT) and Minnesota (MISO).

Led by Founder, President, and CEO Andrew Waranch, Spearmint Energy is privately held and backed by private equity. The company has recently secured substantial financing, including a $325 million debt facility in June 2026 and approximately $450 million in project financings for its Red Egret project in Texas. Spearmint Energy currently operates 350 MW/700 MWh of battery storage assets in ERCOT, with an additional 300 MW/600 MWh under construction, and recently obtained a site permit for its 150 MW/600 MWh Midwater Energy Storage Project in Minnesota. The company is controlled by Roscommon Analytics.