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Take Control of Your Energy Storage System

Field-Proven, UL 1973 Recognized

Nuvation Energy provides configurable battery management systems that are UL 1973 Recognized for Functional Safety. Designed for battery stacks that will be certified to UL 1973 and energy storage systems being certified to UL 9540, this industrial-grade BMS is used by energy storage system providers worldwide.


  • Nuvation Energy battery management systems are high-reliability electrical controls that have been continuously improved upon for over a decade. The “G4” and “G5” designations of our High-Voltage BMS refer to fourth and fifth generation product iterations. Our Low-Voltage BMS is a fourth-generation product.
  • Used in hundreds of energy storage systems worldwide and trusted by energy storage providers, our BMS is a mature field-proven product that has been safely managing large-scale energy storage platforms for many years.
  • All our battery management systems have been third-party tested by UL (Underwriters Laboratories) and Recognized to the UL 1973 standard for Functional Safety. The Nuvation Energy BMS has been rigorously tested for its responsiveness to an exhaustive range of potential safety incidents and found by UL to manage them all in functionally safe manner. Our UL certifications can be verified on the UL website. The G5 BMS is also CE conformant and has been certified to the widely recognized IEC 60730-1 (Annex H) standard for automatic electrical controls.


Nuvation Energy’s High-Voltage Battery Management Systems are designed to scale from managing a single battery stack up to 1500 V to managing 16 stacks in parallel with the Multi-Stack Controller. We will also provide UL certified cable harnesses to connect the BMS modules in each stack. The Low-Voltage BMS (11-60 V) is also expandable, enabling management of up to 32 cells in series.


The G5 High-Voltage BMS is the newest addition to the Nuvation Energy BMS family. Designed for lithium-based chemistries (1.6 V – 4.3 V cells), it supports battery stacks up to 1500 V and is available in 200, 300, and 350 A variants. The G4 High-Voltage BMS supports the widest range of battery chemistries (0 V – 5 V, and monobloc cells 5 V – 20 V), stack voltages of up to 1250 V and can support between 100 A and 350 A per battery stack.  


Nuvation Energy’s battery management systems are highly configurable via a user-friendly Operator Interface. Outside of the factory-locked UL Recognized safety configuration, users can adjust many settings to meet specific application requirements. Examples include narrowing the State of Charge (SOC) / Depth of Discharge (DOD) range to preserve battery life or to increase cycle count, or expanding the warning triggers to support preventive maintenance, and adjusting battery management parameters within the functionally safe region to align with PCS requirements. 


Nuvation Energy battery management systems include a range of intelligent features beyond cell balancing and managing battery safety thresholds. They include:

  • Continuous Cell Balancing: The amount of time an ESS spends out of operation can be costly to the system operator. Traditional cell balancing takes place only at the top of the charge cycle which, depending on the amount of imbalance in the batteries, can result in a long out of service period for the ESS as it brings all the cells to a full charge. With Nuvation’s G5 BMS, cell imbalance is estimated when the fastest charging cell reaches 100% SOC, and the BMS balances the remaining cells during system operation. This enables the ESS to quickly resume operation. In many use-case scenarios Nuvation Energy’s continuous balancing approach delivered over 99% ESS uptime.
  • Self-Diagnostics: On initial startup the BMS will run a self-test to ensure that data is propagating properly across all the BMS modules. This helps system installers find damaged, loose, disconnected, and incorrectly torqued sense wires.
  • Stack Assembly Diagnostics: Improperly installed high-current connections in a battery stack can manifest as an increase in the internal temperature of the BMS. Temperature sensors inside the BMS will trip a warning notification when this occurs.
  • Built-In Fan Controls: The BMS will detect temperature increases inside battery modules and turn on cooling fans (both AC and DC fans are supported) before these temperature rises are detected by ESS environmental controls.
  • Contactor Life Tracking: While contactors are designed to be able to be opened under load, their usable life will be consumed if this occurs too often. The Nuvation Energy BMS records high-current occurrences of contactor opening and decrements the remaining life at each occurrence, based on contactor safety testing performed at UL laboratories for Nuvation Energy. The BMS will warn users as the contactors approach their end of life. It will also prevent further usage of the Stack Switchgear unit when the contactor life is fully consumed and is no longer safe to operate.
  • Dynamic Current Limits: The battery management system provides the PCS with the maximum current threshold of the battery. The Nuvation Energy BMS will reduce these thresholds during charging and discharging to prevent over-temperature, over-charging, and over-discharging.
  • Control Loop Tuning: A common issue that can arise between a BMS and PCS involves current and voltage oscillation brought about by the BMS changing current thresholds in response to the application of current from the PCS, and the PCS changing current levels in response to new threshold data from the BMS. This “control loop” problem is often managed on site during ESS commissioning by a complex process of implementing filtering in a controller that sits between the batteries and PCS. With Nuvation Energy’s BMS, this power oscillation can be quickly resolved via a few BMS settings.

Easy to Use

Unlike many other battery management systems, the Nuvation Energy BMS has been designed to provide an excellent user experience in addition to managing battery safety. A user-friendly Operator Interface can be accessed via PC through a direct connection to the BMS hardware or remotely. Battery status as well as configurable settings are viewable on a PC via most popular Internet browsers. A user can view a wide array of battery status data, or with secure access can change settings, upload a new configuration file, modify warning triggers, and even update the BMS firmware.

High-Voltage BMS

High-Voltage BMS

Configurable UL 1973 Recognized battery management systems for stationary and mobile energy storage applications.

Low-Voltage BMS

Low-Voltage BMS

Solutions for demand charge management and DER asset prioritization. Energy storage system design services.

Multi-Stack Controller

Multi-Stack Controller

Aggregates parallel battery stacks within your energy storage system, managing them as a single unified battery.

UL 1973 Recognized

UL 1973 Recognized

Solutions for demand charge management and DER asset prioritization. Energy storage system design services.


“As one of the most reliable and well-designed battery management systems available today for energy storage, e2’s use of Nuvation Energy’s BMS in our energy storage system supports that worry-free promise that our customers depend on.”

James Richmond

President and CEO of e2 Companies

“Nuvation Energy’s battery management system impressed us with how reliably it managed our batteries. It is also easy to integrate with the range of inverters we support, and has a highly intuitive user interface for configuring the system and viewing battery status information.”

Brandon Williams

CEO of Iron Edison

“Between the efforts of POWERSYNC, Nuvation, and Maximo Solar, we developed an energy storage solution capable of providing our clients with a unique and scalable turnkey microgrid for commercial applications.”

Steve May

President of POWERSYNC Energy Solutions

“Nuvation Energy’s battery management systems and energy controller were easy to integrate, and their engineering team provided ESS designs that significantly reduced time to market.”

Trygve Burchardt


“As one of the most reliable and well-designed battery management systems available today for energy storage, e2’s use of Nuvation Energy’s BMS in our energy storage system supports that worry-free promise that our customers depend on.”

Woody Gibson

CEO of Stalwart Power


In recent months Nuvation Energy has been receiving inquiries from battery manufacturers and system integrators about our battery management systems with regards to country of origin and manufacture, and about cybersecurity. We have produced a whitepaper that provides a brief overview of the industry forces driving these inquiries, and how Nuvation Energy is meeting these challenges in the way we develop and manufacture our energy control solutions.

Nuvation Energy’s Made in US and Canada G5 Battery Management System for Energy Storage Begins Volume Shipping

Nuvation Energy’s latest generation UL 1973 Recognized and configurable BMS is now shipping in volume to energy storage system developers and battery manufacturers. The G5 BMS addresses utility grid industry security concerns by being designed and developed in the US and Canada and manufactured in Canada.

Introduction to the Nuvation Energy G5 BMS

Michael Worry, CEO of Nuvation Energy walks us through the Nuvation Energy G5 High-Voltage BMS and what makes it special.

Energy Storage Designs that Maximize Supply Chain Flexibility

Joe O’Connor, Director of ESS Solutions at Nuvation Energy, examines ways ESS developers are reducing their project and business-risk through modular approaches to ESS design that anticipate supply chain challenges and innovation opportunities.

Webinar: Battery Management System Impacts on Energy Storage

Nuvation Energy CEO Michael Worry explores the current state of the art in battery cell balancing, and how BMS innovations will impact the future of stationary energy storage.

Honeywell Collaborates with Nuvation Energy to Add Flexible Battery Management System to Honeywell Ionic™

Honeywell today announced its collaboration with Nuvation Energy to integrate an improved battery management system (BMS) into Honeywell’s modular battery energy storage system, Honeywell Ionic™.

Nuvation Energy Releases 1500 Volt BMS for Stationary Energy Storage

Nuvation Energy’s new fifth generation battery management system can provide up to a 25% cost per kilowatt-hour ($/kWh) reduction over their fourth generation BMS when used in 1500 Volt stationary energy storage systems. This new BMS also supports the most recent updates to UL1973 (UL 1973:2022).

Meet BESSIE: Nuvation’s Energy Storage System

Many Nuvation employees drive electric vehicles, including to our office, where they plug into an EV charging post. While this started racking up Nuvation’s utility bill, the team decided to build our very own Battery Energy Storage System.

Meet eRex

When we couldn’t find a suitable battery management system for our electric vehicle project, we decided to make one ourselves. With our electronic design experience, we were confident we could build exactly what we needed.

Building a 2 MW Energy Storage System

In the event of a grid power failure, this compact 588 kWh ESS outputs 2 MW of power for 15 minutes. It transitions a wastewater treatment plant in Santa Rosa, CA from grid power to diesel backup generators.

Islas Secas Micro Grid

Nuvation Energy provided battery management solutions for Islas Secas, a 100% solar powered resort off the coast of Panama. We developed a custom energy storage solution controller, as well as a battery management system to expand their battery storage capacity.

Construction of a 1 MW Energy Storage System

Electric Applications chose Nuvation Energy’s battery management system to manage their 960 VDC 1 MW / 1 MWh grid-attached energy storage system. This lead-acid energy storage system was installed by City Utilities in Missouri.

Understanding Contactors

Nuvation Energy’s battery management system can provide power to the contactor coils directly, which strengthens its reliability as a safety system by enabling it to de-energize the contactors without assistance from any additional components.

Battery Packs, Stack, and Modules

Nuvation Energy shares our experience in energy storage system design from the vantage point of the battery management system. In part 1, we present module and stack design approaches that can reduce system costs while meeting power and energy requirements.

UL 1973 Battery Stack Design

Nuvation Energy shares our experience in energy storage system design from the vantage point of the battery management system. In part 2, we share experience working with UL to create UL 1973 Recognized stack level solutions.

Energy Storage System Visibility

Nuvation Energy shares our experience in energy storage system design from the vantage point of the battery management system. In part 3, we explore pain points that energy storage system developers and operators can encounter in the field.

Energy Storage and DER Control Behind the Meter

Principal Software Architect John Chinnick presents a behind-the-meter distributed energy resource (DER) infrastructure that includes solar generation, energy storage, and a utility grid connection serving a commercial or industrial load.

Battery Warranty Tracking for Energy Storage

Nuvation Energy CEO Michael Worry takes a closer look at how energy storage system providers and users can track battery utilization to verify adherence to warranty parameters, and also to proactively identify and resolve problems before they result in battery damage.

BMS Operator Interface Demo

Take a quick dive into how our battery management system’s operator interface works. Nuvation Energy CEO Michael worry demonstrates all aspects of our OI, including measurements, voltages, cell balancing, and more!

Battery State of Health

In our final webinar in this series, “Battery State of Health in Energy Storage Systems” Stefan Janhunen, Principal Software Architect and battery measurement algorithms developer at Nuvation Energy, takes a deeper dive into battery State of Health.

High-Voltage Battery Management System Architecture

BMS Designer Alex Ramji walks us through Nuvation Energy’s battery management products for high-voltage applications. These solutions are designed for use in large scale applications such as utility-grid support in front of the meter and demand charge management behind the meter.

Nuvation Energy Stack Switchgear

Battery Management System designer Alex Ramji provides a walk-through of Nuvation Energy’s Stack Switchgear (SSG), a stack-level battery management system that is generally located above or below each stack in a large-scale high-voltage (i.e. 60-1250 V DC) energy storage system.

Webinar: Choosing the Right ESS

Nuvation Energy CEO Michael Worry alongside Business Development Engineer Joe O’Connor talk about a variety of performance and long term ownership requirements to take into account when choosing the right energy storage system.

What Makes Nuvation Energy Different?

Nuvation Energy CEO Michael Worry discusses what makes Nuvation’s battery management systems different from any other product on the market. He also introduces the nController energy management system and why its functionalities are so important.

Webinar: Lessons from Deploying Second-Life Energy Storage

When an automotive battery comes out of its first life usage, it can still have 70% or more of its useful capacity remaining. The batteries must be stored, recycled or redeployed in second life energy storage. Nuvation Energy has successfully field deployed many second-life energy storage systems.

Getting Personal with the CEO

Did you know that as an avid energy storage enthusiast in his personal time, Nuvation Energy CEO Michael Worry is involved in the development of battery powered robotic beer kegs, and fire breathing mutant vehicles?!

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