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BESSY FIRE PROTECTION

BESSY: The First Name in BESS Fire Protection

Modular fire barriers designed to help limit thermal transfer and minimize separation distance between battery energy storage units as well as adjacent equipment.

Trusted by utilities, EPCs &
engineering teams

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★★★★★

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About BESSY

Fire Protection Designed Specifically for Battery Energy Storage Systems

The rapid expansion of renewable energy has increased the need for reliable fire separation within battery energy storage facilities. A single thermal event can result in equipment loss, extended downtime, and system level disruption.

BESSY is DuraSystems’ engineered fire barrier system developed to help control horizontal thermal spread between adjacent energy storage units. Built on more than thirty five years of fire protection expertise, BESSY provides predictable thermal behavior, structural integrity, and flexible integration into modern energy storage site layouts.

Learn More

Learn More

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BESSY Models

BESSY SF

The BESSY SF system provides 6 hours of fire integrity and is engineered for rapid installation, modular configuration, and relocatability. Ideal for spacing between adjacent BESS units and general protection requirements.

SF

BESSY SF

120

BESSY 120

240

BESSY 240

SF

BESSY SF

BESSY SF

The BESSY SF system provides 6 hours of fire integrity and is engineered for rapid installation, modular configuration, and relocatability. Ideal for spacing between adjacent BESS units and general protection requirements.

120

BESSY 120

BESSY 120

A UL/ULC-listed 2-hour non-load-bearing fire barrier with tongue-and-groove connections. Designed for controlled thermal performance and secure separation between BESS units and equipment.

240

BESSY 240

BESSY 240

Our highest-rated system, offering 4-hour UL/ULC fire protection for demanding, high-risk installations. Built for extended thermal exposure and robust perimeter defense.

SF

BESSY SF

BESSY SF

The BESSY SF system provides 6 hours of fire integrity and is engineered for rapid installation, modular configuration, and relocatability. Ideal for spacing between adjacent BESS units and general protection requirements.

120

BESSY 120

BESSY 120

A UL/ULC-listed 2-hour non-load-bearing fire barrier with tongue-and-groove connections. Designed for controlled thermal performance and secure separation between BESS units and equipment.

240

BESSY 240

BESSY 240

Our highest-rated system, offering 4-hour UL/ULC fire protection for demanding, high-risk installations. Built for extended thermal exposure and robust perimeter defense.

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BESSY Models

BESSY SF

The BESSY SF system provides 6 hours of fire integrity and is engineered for rapid installation, modular configuration, and relocatability. Ideal for spacing between adjacent BESS units and general protection requirements.

SF

BESSY SF

120

BESSY 120

240

BESSY 240

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BESSY Models

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ENGINEERING CAPABILITIES

Engineered for dependable performance in real world environments

Certified Performance

Tested and validated for critical fire conditions

BESSY systems undergo recognized fire testing to verify containment performance, thermal stability, and measurable behavior under event conditions.

Certified Performance

Tested and validated for critical fire conditions

BESSY systems undergo recognized fire testing to verify containment performance, thermal stability, and measurable behavior under event conditions.

Engineered Approach

Designed to perform in demanding environments

Each configuration is engineered to withstand outdoor exposure, thermal loading, and structural stresses common to utility and energy storage sites.

Engineered Approach

Designed to perform in demanding environments

Each configuration is engineered to withstand outdoor exposure, thermal loading, and structural stresses common to utility and energy storage sites.

Long-Term Safety

Built for durable protection over extended service life

BESSY helps reduce site risk, maintain safe equipment separation, and deliver durable protection for battery energy storage projects.

Long-Term Safety

Built for durable protection over extended service life

BESSY helps reduce site risk, maintain safe equipment separation, and deliver durable protection for battery energy storage projects.

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What We Offer

Engineering support that ensures accurate system design and integration

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Site Layout Review DuraSystems BESSY

Site Layout Review

We assist with determining spacing, exposure considerations, and barrier placement to support effective separation and proper system design.

SEPARATION

PLACEMENT

EXPOSURE

CLEARANCES

Site Layout Review

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DuraSystems BESSY System Specification

System Specification

We provide configuration guidance, panel selections, and technical details needed to include BESSY accurately in drawings and project specifications.

DOCUMENTATION

CONFIGURATION

REQUIREMENTS

COMPLIANCE

System Specification

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Integration Planning

We support mounting conditions, clearances, anchorage, and interactions with adjacent structures to ensure smooth and accurate system integration.

ANCHORAGE

MOUNTING

INTERFACES

COORDINATION

Integration Planning

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DuraSystems BESYY Technical Documentation

Technical Documentation

We supply drawings, and submittal packages required for permitting, engineering review, and project approval.

TESTING

DRAWINGS

SUBMITTALS

Technical Documentation

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Site Layout Review DuraSystems BESSY

Site Layout Review

We assist with determining spacing, exposure considerations, and barrier placement to support effective separation and proper system design.

SEPARATION

PLACEMENT

EXPOSURE

CLEARANCES

Site Layout Review

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DuraSystems BESSY System Specification

System Specification

We provide configuration guidance, panel selections, and technical details needed to include BESSY accurately in drawings and project specifications.

DOCUMENTATION

CONFIGURATION

REQUIREMENTS

COMPLIANCE

System Specification

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Integration Planning

We support mounting conditions, clearances, anchorage, and interactions with adjacent structures to ensure smooth and accurate system integration.

ANCHORAGE

MOUNTING

INTERFACES

COORDINATION

Integration Planning

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DuraSystems BESYY Technical Documentation

Technical Documentation

We supply drawings, and submittal packages required for permitting, engineering review, and project approval.

TESTING

DRAWINGS

SUBMITTALS

Technical Documentation
Reliable guidance through every stage of design

Our team provides the technical clarity required to apply the BESSY system correctly. We help engineering teams reduce uncertainty, align with project requirements, and ensure consistent field performance across a range of site conditions.

Guidance for accurate system placement

We assist with evaluating spacing, orientation, and layout requirements to support effective separation and dependable system performance.

Learn More

Learn More

Engineering support you can rely on

Our team provides technical review, and project specific recommendations from early planning through installation.

Get in Touch

Get in Touch

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Start Here

Connect with our team

Provide your project specs and our team
will contact you with next steps.

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Our Method

Engineered for reliability from design through installation

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Engineering Evaluation
Engineering Evaluation

We begin by reviewing site layout, available separation distances, and environmental exposures to guide the team in selecting the preferred barrier configuration. This ensures the selected system aligns with project needs and applicable separation guidelines.

We begin by reviewing site layout, available separation distances, and environmental exposures to guide the team in selecting the preferred barrier configuration. This ensures the selected system aligns with project needs and applicable separation guidelines.

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System Design & Specification
System Design & Specification

Based on project parameters, we define panel configurations, mounting conditions, and structural considerations. Approval drawing, including the reactions transferred to the slab or foundation, are provided to support accurate inclusion the projects as-built drawings.

Based on project parameters, we define panel configurations, mounting conditions, and structural considerations. Approval drawing, including the reactions transferred to the slab or foundation, are provided to support accurate inclusion the projects as-built drawings.

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Integration & Field Coordination
Integration & Field Coordination

We develop plans alongside your team, ensuring sustainable results. Our hands-on approach includes support, monitoring and adaptation to embed changes and deliver long-term value.

We develop plans alongside your team, ensuring sustainable results. Our hands-on approach includes support, monitoring and adaptation to embed changes and deliver long-term value.

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Our Expertise

Where engineering, performance, and reliability meet measurable results

ENGINEERING DESIGN

Engineered solutions that deliver proven fire protection

We help teams configure BESSY systems that meet required fire ratings, site conditions, and performance criteria.

ENGINEERING DESIGN

Engineered solutions that deliver proven fire protection

We help teams configure BESSY systems that meet required fire ratings, site conditions, and performance criteria.

SYSTEM PERFORMANCE

Optimizing fire separation and improving site safety

We validate performance through certified testing and real world installation data to support dependable execution.

SYSTEM PERFORMANCE

Optimizing fire separation and improving site safety

We validate performance through certified testing and real world installation data to support dependable execution.

PROJECT INTEGRATION

Supporting consistent deployment across energy storage sites

We provide clear guidance to help teams integrate BESSY into site layouts and project workflows with confidence.

PROJECT INTEGRATION

Supporting consistent deployment across energy storage sites

We provide clear guidance to help teams integrate BESSY into site layouts and project workflows with confidence.

Building partnerships that strengthen energy storage projects

Engineering Support

Clear Communication

Reliable Delivery

We work closely with utilities, EPC contractors, and engineering teams to deliver safe and reliable fire separation for battery energy storage sites. Through hands on support and clear communication, we help projects move forward with confidence and long term performance in mind.

Connect with our team

Connect with our team

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frequently asked questions

Straightforward answers to help you make informed choices.

What is the BESSY system used for?

BESSY is an engineered passive fire barrier system used to help control the spread of fire and associated elevated temperatures between battery energy storage units. It supports defined separation distances and provides reliable fire separation in utility, commercial, and industrial energy storage projects.

How do I know which BESSY configuration I need?

Configuration depends on separation distance, site layout, exposure conditions, and project requirements. Our engineering team reviews these factors and recommends the most appropriate BESSY configuration for each application.

What information do you need to provide a quote or specification?

Typical information includes site drawings or sketches, equipment spacing, desired separation performance, local code considerations, and any structural or foundation constraints. The more detail you can share, the more precise our recommendations will be.

What testing and certifications support BESSY?

BESSY is supported by testing to UL/ULC and ASTM standards. Listings and documentation are available to assist with engineering review, permitting, and specification requirements.

Can BESSY be used on existing sites or only new projects?

BESSY can support both new installations and retrofits on existing sites, subject to available space, foundations, and access. We work with project teams to evaluate feasibility and integration options in each case.

Do you provide engineering support during installation?

Yes. We provide technical guidance, documentation, and clarification during installation to help ensure BESSY is installed as designed and performs as intended in field conditions.

What is the BESSY system used for?

BESSY is an engineered passive fire barrier system used to help control the spread of fire and associated elevated temperatures between battery energy storage units. It supports defined separation distances and provides reliable fire separation in utility, commercial, and industrial energy storage projects.

How do I know which BESSY configuration I need?

Configuration depends on separation distance, site layout, exposure conditions, and project requirements. Our engineering team reviews these factors and recommends the most appropriate BESSY configuration for each application.

What information do you need to provide a quote or specification?

Typical information includes site drawings or sketches, equipment spacing, desired separation performance, local code considerations, and any structural or foundation constraints. The more detail you can share, the more precise our recommendations will be.

What testing and certifications support BESSY?

BESSY is supported by testing to UL/ULC and ASTM standards. Listings and documentation are available to assist with engineering review, permitting, and specification requirements.

Can BESSY be used on existing sites or only new projects?

BESSY can support both new installations and retrofits on existing sites, subject to available space, foundations, and access. We work with project teams to evaluate feasibility and integration options in each case.

Do you provide engineering support during installation?

Yes. We provide technical guidance, documentation, and clarification during installation to help ensure BESSY is installed as designed and performs as intended in field conditions.