GridStar Flow

Energy Storage

GridStar Flow

The New Standard in Long-Duration Energy Storage

As wind and solar become cost-competitive across the globe, we envision a world where we can realize the full potential of clean energy by integrating storage that can capture that power for minutes, hours or even days.

To make this vision a reality, Lockheed Martin Energy is developing the world’s most advanced flow battery. GridStar® Flow provides long-duration storage – with superior durability, flexibility and safety – backed by the engineering excellence of Lockheed Martin.

Together with LM Energy’s systems integration experience and intelligent control platform, GridStar Flow establishes the new standard in energy storage durability, flexibility and safety.


  • Large-scale renewables integration
  • Transmission and distribution asset deferral
  • Large-scale industrial energy management
  • Utility reserve capacity and peak power
  • Microgrid support

The Energy Storage Imperative

A Guide for Grid Planners in the Renewables Era

Electric grids are undergoing unprecedented disruption as renewables rapidly take root, displacing other energy sources. Storage has a vital role to play in this evolution. But the current dominant technologies in use today cannot sufficiently provide the durable, flexible and distributed energy storage required. Download our latest whitepaper for an in-depth guide to anticipating and planning for the best ways to adapt to historic changes in the energy industry.

How Flow Batteries Work

LM Energy’s GridStar Flow is an innovative redox flow battery designed to be a durable, flexible and safe long-duration energy storage solution. The technology behind GridStar Flow is the coordination chemistry flow battery (CCFB).

LM Energy’s proprietary GridStar Flow uses engineered electrolytes made from earth-abundant materials with characteristics that enable lower cost balance-of-plant components, higher round-trip efficiency, and longer useful life than current flow battery solutions.

Product Benefits


Designed to be durable for more than 20 years, the GridStar Flow meets the requirements of long-duration use cases. In addition, while it can operate at short charge-discharge durations, the system is optimized for applications requiring six or more hours of duration, high annual cycle requirements and a high rest state-of-charge.  


The inherent flexibility of the GridStar Flow meets end-of-life capacity in large part regardless of the duty cycle. This provides customers with valuable optionality:

- Lack of degradation for full 100 percent depth of discharge cycles allows for future operational flexibility, in contrast to some battery chemistries which have limitations in their ability to respond to unplanned types of operation.

- Operators can increase just energy capacity in the future – due to separation of energy and power. They can add more electrolyte to increase system energy, allowing systems to accommodate future changes of uses cases.

Full Lockheed Martin warranty

Our systems are backed by a full Lockheed Martin warranty.



A focus on safety permeates product design choices. The CCFB framework of proprietary coordination complexes results in a low-cost, mildly alkaline aqueous electrolyte solution that is both stable and safe.

Robust, Reliable System

Factory assembled power components combined with field assembly of electrolyte tanks achieves 100 MWh scale energy storage with a reduced number of components compared with other systems. This simplifies installation and maintenance, with a goal of improving quality and safety.

Optimized for total cost of ownership

Energy storage system selection should be based on the total cost of ownership (TCO) of an energy storage system, not just the first costs. GridStar Flow is optimized to offer low cost of ownership over the system lifetime. This includes all the costs for initial installation as well as costs associated with system replenishment, operation and maintenance, and energy loss.


Track Record in Energy Storage

Since 2017, Lockheed Martin has installed over 100 MWh of energy storage across the U.S. and Canada. Lockheed Martin worked with a variety of customers including federal entities, utilities, IPPs and developers to install lithium-ion storage systems for behind- and front-of-meter projects with applications ranging from renewable integration and demand charge reduction, to transmission and distribution deferral and microgrid integration. For more information, view our project summaries and press releases below.  

Business Inquiries

GridStar is a trademark of Lockheed Martin Corporation

GridStar is a trademark of Lockheed Martin Corporation