GridStor
GridStor is a privately held, Goldman Sachs Asset Management-backed developer, owner, and operator of standalone utility-scale battery energy storage systems in the U.S., serving utilities, Fortune 500 corporate offtakers, data centers, and energy traders via long-term tolling, resource adequacy, and bespoke storage agreements.
- Company typePrivate
- Founded2022
- HeadquartersPortland, United States
- Headcount51–100
- GTM typeB2B
- OfferingServices
What GridStor does
GridStor is a privately held developer, owner, and operator of utility-scale, standalone lithium-ion battery energy storage systems (BESS), founded in 2022 and headquartered in Portland, Oregon. The company was capitalized at inception by a fund managed by Goldman Sachs Asset Management (Sustainability and Infrastructure Investing groups, including the Horizon Energy Storage fund) and is led by CEO Chris Taylor, a former head of clean energy investing for Google's global data center business. GridStor's core technology consists of fully integrated Tier 1 lithium-ion battery systems deployed on small (2.6 to 15 acre) industrial parcels sited immediately adjacent to existing utility substations in load-pocket regions, with thermal management, battery-health sensors, fire detection/suppression, UL-certified safety standards, protected enclosures, 24/7 remote monitoring, and project-specific multi-agency emergency response plans.
As of May 2026 GridStor manages 530 MW / 1,300 MWh of operational and under-construction assets, including two operational projects — Goleta (60 MW / 160 MWh, California, Q4 2023) and Hidden Lakes (220 MW / 440 MWh, Texas, Q4 2025) — and two under construction — Gunnar (150 MW / 300 MWh, Texas, late 2026 expected) and White Tank (100 MW / 400 MWh, Arizona, H1 2027 expected) — with a recently acquired Birdseye project (199 MW / 796 MWh, Colorado, end-2028 expected) and a 3+ GW later-stage development pipeline spanning CAISO, ERCOT, WECC, SPP, MISO, and PJM. Revenue is generated primarily through long-term tolling agreements with Fortune 500 offtakers, multi-year resource adequacy contracts with investor-owned utilities (including a 17-year RA contract with Southern California Edison), bespoke structured products such as the 100 MW Energy Storage Agreement with Axpo, and one-time federal investment tax credit transfers (e.g., $86 million to Foss & Company for Hidden Lakes). The go-to-market is direct enterprise origination by a commercial team structured around a VP of Origination & Power Marketing, Chief Commercial Officer, and regional Development VPs, targeting utilities, data centers, large industrial customers, and energy traders in regions with rapidly growing electricity demand.
GridStor firmographics
Firmographics- Name
- GridStor
- Legal name
- GridStor LLC
- Website
- https://gridstor.com
- Company type
- Private
- Founded year
- 2022
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- GridStor is a privately held, Goldman Sachs Asset Management-backed developer, owner, and operator of standalone utility-scale battery energy storage systems in the U.S., serving utilities, Fortune 500 corporate offtakers, data centers, and energy traders via long-term tolling, resource adequacy, and bespoke storage agreements.
- Ownership category
- akta.pro rank
GridStor industry classification
Industry- Product category
- Utility-Scale Battery Energy Storage
- NAICS
- Electric Power Generation (22111)
- SIC
- Electric Services (4911)
- akta.pro primary industry
- Utility-Scale BESS Project Development & Ownership (IPP/Developer) (EUAFAAAA)
- akta.pro secondary industries
- BESS Financing, Insurance & Contracting (Tax Equity, PPA/Tolling, Warranties) (EUAFAAAI), BESS Market Participation & Trading Services (Ancillary/Capacity/Arbitrage) (EUAFAAAL), BESS Operations, Maintenance & Asset Performance Management (APM) (EUAFAAAG), Utility-Scale BESS EPC & Integration (EUAEAEAA)
Keywords
Where GridStor is headquartered
LocationHeadquarters
- HQ city
- Portland
- HQ country
- United States
- HQ region
- North America
Offices4 records
Markets served
GridStor business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Infrastructure, Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales
Revenue model
- Long-term tolling agreements with Fortune 500 offtakers: Fixed-price contracts with corporate offtakers for the full output of BESS facilities. Gunnar (Hidalgo County, TX) and Hidden Lakes (Galveston County, TX) are both backed by tolling agreements with Fortune 500 counterparties, providing contracted revenues and predictable cash flow over multi-year terms.
- Resource adequacy (RA) capacity contracts with utilities: Long-term capacity payments from investor-owned utilities for resource adequacy attributes. GridStor has a 17-year RA contract with Southern California Edison for the Goleta facility, and similar long-duration capacity contracts underpin additional projects.
- Bespoke energy storage swap/agreement transactions: Structured energy storage agreements with energy traders/retailers (e.g., 100 MW bespoke agreement with Axpo at Hidden Lakes) that deliver pricing predictability to retail customers and generate contracted revenue through financial/physical swap structures.
- Investment tax credit (ITC) transfer monetization: One-time monetization of federal investment tax credits via tax credit transfer agreements (e.g., $86 million tax credit transfer to Foss & Company for the Hidden Lakes project), providing capital that supports project financing.
- Wholesale energy and ancillary services market revenue: Revenue from selling stored energy and ancillary services (frequency regulation, spinning reserves, capacity) into wholesale electricity markets (CAISO, ERCOT, WECC) on an as-available basis for non-contracted project output.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Outcome Based/ Performance | Multi-year contract | Project-specific, contract-based pricing not publicly disclosed; bespoke tolling and resource adequacy agreements negotiated with each offtaker. |
Go-to-market motion3 records
Distribution channels3 records
Marketing channels5 records
GridStor product offering
Product offeringCore offering
GridStor develops, owns, and operates utility-scale, standalone lithium-ion battery energy storage systems (BESS) sited adjacent to existing utility substations and load pockets in U.S. markets including CAISO, ERCOT, WECC, SPP, MISO, and PJM. The company sells the output of these facilities under long-term tolling agreements, resource adequacy contracts, and bespoke Energy Storage Agreements to utilities, Fortune 500 corporate offtakers, and energy traders, while also monetizing wholesale energy, capacity, and ancillary services in ISO/RTO markets.
Product overview
GridStor's offering is a single, integrated platform of utility-scale standalone battery energy storage system (BESS) assets and the development/M&A services around them — not a multi-module SaaS suite. Founded in 2022 and backed by Goldman Sachs Asset Management, GridStor develops, acquires, builds, and operates standalone grid-scale batteries in North America; the company's "products" are its physical energy-storage projects that together comprise its operational fleet, construction portfolio, and later-stage development pipeline. The core operating assets are the Goleta Energy Storage facility (60 MW / 160 MWh, California, operational since Q4 2023) and the Hidden Lakes Reliability Project (220 MW / 440 MWh, Texas, operational since Q4 2025); the active construction portfolio includes the Gunnar Reliability Project (150 MW / 300 MWh, Texas, late-2026 COD) and the White Tank Reliability Project (100 MW / 400 MWh, Arizona, H1-2027 COD); the most recently added project is the Birdseye acquisition (199 MW / 796 MWh, Colorado, end-of-2028 target COD); and the development pipeline adds a 200 MW Oklahoma facility and a 90 MW Santa Fe Springs, California facility. Layered on top of these assets are commercial services such as tolling agreements, PPAs, tax-credit-transfer financings, and a bespoke battery-storage swap (Energy Storage Agreement with Axpo on Hidden Lakes) that structures offtake risk management for utilities, data centers, and large industrial customers in the western and central U.S.
Differentiator
Problem solved
Functional benefit
Brands
- Goleta Energy Storage: GridStor's flagship utility-scale battery storage facility in Santa Barbara County, California (60 MW / 160 MWh).
- Hidden Lakes Reliability Project
- Gunnar Reliability Project
- White Tank Reliability Project
Products and services
- Goleta Energy Storage 60 MW / 160 MWh standalone lithium-ion battery energy storage system in Goleta, Santa Barbara County, California, with 44 Tesla battery systems and a 66 kV interconnection at the SCE Isla Vista substation. Provides resource adequacy to Southern California Edison under a 17-year contract and powers the equivalent of 30,000 households during peak demand. Operational since Q4 2023.
- Hidden Lakes Reliability Project 220 MW / 440 MWh standalone battery energy storage facility in Galveston County, Texas, on a 15-acre site south of FM 646 adjacent to AEP infrastructure. Acquired from Balanced Rock Power and operational since Q4 2025. Backed by an Energy Storage Agreement with Axpo to deliver pricing predictability to Houston retail electricity customers. Powers the equivalent of 140,000 households daily during peak demand.
- Gunnar Reliability Project 150 MW / 300 MWh outdoor battery energy storage system under construction in Edinburg, Hidalgo County, Texas, on a 9.7-acre site adjacent to AEP's Closner Substation. Backed by a tolling agreement with a Fortune 500 company and a $120M NORD/LB and Siemens Financial Services financing package. Will supply the ERCOT Lower Rio Grande Valley with power equivalent to serving 95,000 average Texas households during peak demand; expected operational in late 2026.
- White Tank Reliability Project 100 MW / 400 MWh battery energy storage project in Maricopa County, Arizona, acquired from Strata Clean Energy. Sited on a 9-acre portion of a 50+ acre property immediately east of Arizona Public Service Company's Colter substation. Expected to begin commercial operations in the first half of 2027, serving the daily equivalent of 80,000 households during peak system demand and contributing over $5 million in property taxes.
- Birdseye Battery Storage Project 199 MW / 796 MWh standalone battery energy storage system in Adams County, Colorado, acquired from Accelergen in May 2026 and interconnecting to Xcel Energy's Riverdale substation. Construction anticipated to begin as early as 2027 with commercial operations planned for the end of 2028. Expected to serve more than 150,000 households during peak demand.
- 200 MW Oklahoma Pipeline Project 200 MW battery energy storage project in Oklahoma listed in GridStor's later-stage development pipeline, part of GridStor's more-than-3 GW pipeline across the U.S.
- 90 MW Santa Fe Springs, California Pipeline Project 90 MW battery energy storage project in Santa Fe Springs, California listed in GridStor's pipeline as part of the Western U.S. development portfolio. Operational details and target commercial-operations date are not publicly disclosed.
Quantifiable outcome
- Provides power equivalent to serving 95,000 average Texas households during peak demand (Gunnar Reliability Project, 150 MW / 300 MWh).
- +6 more outcomes
Companies that use GridStor
Customer profileNamed customers2 records
Segments5 records
Ideal customer profiles5 records
GridStor technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability1 record
Feature5 records
GridStor partnerships and signals
Strategic signalScale indicators9 records
Recent moves6 records
Expansion highlights6 records
GridStor competitors and assessment
Company assessmentDirect peers
- Jupiter Power: Independent developer, owner, and operator of utility-scale standalone battery energy storage projects in U.S. ISO markets. Operates one of the largest U.S. BESS fleets and competes head-to-head with GridStor for late-stage project acquisitions and Fortune 500 tolling agreements.
- Plus Power: Developer and operator of standalone, utility-scale battery energy storage systems across multiple U.S. ISO markets (CAISO, ERCOT, WECC). Closest direct peer to GridStor in terms of standalone-BESS-only strategy, large-MW project scale, and IPP/tolling commercial model.
- Convergent Energy + Power: Owner and operator of utility-scale standalone battery storage and solar+storage projects in North America. Directly comparable on developer-to-IPP business model, Fortune 500 corporate PPA/tolling offtake strategy, and U.S. geographic footprint.
- Key Capture Energy: Standalone utility-scale battery energy storage developer, owner, and operator with projects in ERCOT, PJM, and other U.S. markets. Closely matches GridStor on standalone-BESS focus, long-term corporate offtake structuring, and project-acquisition growth strategy.
- Fluence Energy: Global provider of utility-scale energy storage products and services, with growing IPP/asset-owner ambitions. Comparable on BESS technology deployment at grid scale, though more of a technology vendor than a pure developer/operator; competes in the same U.S. ISO markets as GridStor.
Emerging players
- Form Energy: Developer of long-duration iron-air battery storage systems with utility-scale projects in development and operation. Comparable as a U.S. BESS developer/owner with utility offtakes, but differentiated by storage chemistry and longer duration profiles.
- Eos Energy Enterprises: U.S.-based developer and manufacturer of long-duration zinc-battery storage systems for utility and commercial applications. Comparable as a U.S. storage developer/operator with utility offtake relationships, but differentiated by battery chemistry and earlier commercial stage.
Broad incumbents
- Clearway Energy Group: Large publicly traded owner/operator of renewable and energy storage assets with a material standalone BESS portfolio. Comparable on long-dated contracted revenues and utility-scale storage ownership, but operates as a diversified platform with wind and solar generation alongside storage.
- Vistra: Major U.S. independent power producer with one of the largest U.S. BESS portfolios, anchored in ERCOT. Directly comparable on Texas storage development and on long-dated corporate/utility contracting, though Vistra also operates a large conventional generation fleet.
- NextEra Energy Resources: Largest U.S. renewable energy developer and operator, with significant utility-scale battery storage projects across CAISO, ERCOT, and other markets. Competes with GridStor for interconnection capacity, offtake counterparties, and project acquisitions at the highest end of the market.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
GridStor social profiles
Digital presenceGridStor financial estimates
Financial estimateRevenue estimate
Valuation estimate
GridStor leadership team
Management profileNumber of profiles
Profiles9 records
GridStor funding detail
Funding detailFunding overview
Funding rounds4 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
GridStor M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about GridStor
What does GridStor do?
GridStor develops, owns, and operates utility-scale, standalone lithium-ion battery energy storage systems (BESS) sited adjacent to existing utility substations and load pockets in U.S. markets including CAISO, ERCOT, WECC, SPP, MISO, and PJM. The company sells the output of these facilities under long-term tolling agreements, resource adequacy contracts, and bespoke Energy Storage Agreements to utilities, Fortune 500 corporate offtakers, and energy traders, while also monetizing wholesale energy, capacity, and ancillary services in ISO/RTO markets.
Is GridStor a public or private company?
GridStor is a private company. It is classified as venture growth investor backed and is currently operating.
When was GridStor founded?
GridStor was founded in 2022. It employs 51 to 100 people.
Where is GridStor based?
GridStor is headquartered in Portland, United States, in the North America region.
How does GridStor make money?
Five revenue lines are on record. Long-term tolling agreements with Fortune 500 offtakers are the primary driver. The others are resource adequacy (RA) capacity contracts with utilities, bespoke energy storage swap/agreement transactions, investment tax credit (ITC) transfer monetization and wholesale energy and ancillary services market revenue.
Who are GridStor's main competitors?
Direct peers on record are Jupiter Power, Plus Power, Convergent Energy + Power, Key Capture Energy and Fluence Energy. Emerging players are Form Energy and Eos Energy Enterprises. Broad incumbents are Clearway Energy Group, Vistra and NextEra Energy Resources.
Does GridStor have an API?
No public API is recorded for GridStor.
What industry is GridStor in?
GridStor's product category is Utility-Scale Battery Energy Storage. Its primary akta.pro industry code is EUAFAAAA, Utility-Scale BESS Project Development & Ownership (IPP/Developer), with a secondary code of EUAFAAAI, BESS Financing, Insurance & Contracting (Tax Equity, PPA/Tolling, Warranties). Its NAICS code is 22111 and its SIC code is 4911.