GridStor - White Tank

Overview

Deal Type Debt Capital Markets
Size $220 Million
Senior Secured Credit Facilities
Client & Transactional Partners GridStor
Goldman Sachs Asset Management
Our Role Coordinating Lead Arranger

Summary

On July 28, 2026, KeyBanc Capital Markets Inc. (KBCM) successfully closed $220 million of Senior Secured Credit Facilities supporting GridStor’s utility-scale standalone battery energy storage project, White Tank. The facilities include a $140.4 million construction-to-term loan, a $42.8 million tax-credit bridge loan, and $36.9 million in letters of credit. Proceeds will be used to fund the project’s construction costs. KBCM acted as Coordinating Lead Arranger.

White Tank is a 100 MWac/400 MWh energy storage project located in Maricopa County, Arizona. The project is supported by a 20-year tolling agreement with Arizona Public Service, an investment-grade regulated utility. Built with tier-1 equipment, White Tank is expected to reach commercial operations in February 2027. Once operational, it will provide grid stability to over 80,000 Arizona homes.

This financing represents the first transaction between GridStor and KBCM.

About GridStor
GridStor is backed by Goldman Sachs Asset Management (GSAM), which acquired the company in 2022 to support the buildout of its utility-scale energy storage platform. GridStor focuses on delivering large-scale energy storage solutions that support grid reliability and help meet rapidly growing power demand from utilities, data centers, and other industrial customers. Its strategy is centered on developing and operating standalone battery storage projects that provide cost-effective, near-term infrastructure solutions in high-growth power markets.

About Goldman Sachs Asset Management
Founded in 1988, GSAM is a global investment manager with over $1 trillion in assets under supervision and a global platform spanning multiple asset classes, industries, and geographies. The firm serves clients across pension plans, sovereign wealth funds, insurance companies, financial institutions, endowments, foundations, family offices, and individual investors.

KeyBanc Capital Markets is a trade name under which the corporate and investment banking products and services of KeyCorp and its subsidiaries, KeyBanc Capital Markets Inc., Member FINRA/SIPC (“KBCMI”), and KeyBank National Association (“KeyBank N.A.”), are marketed. Securities products and services are offered by KeyBanc Capital Markets Inc. and its licensed securities representatives. Banking products and services are offered by KeyBank N.A.

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