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Safety protection requirements for energy storage batteries

ACP’s Battery Storage Blueprint for Safety outlines key actions and policy recommendations for state and local jurisdictions to regulate battery storage, enforce the country’s most rigorous safety standards, and ensure coordination on safety and emergency response in all communities.
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Are battery energy storage systems safe?

WASHINGTON, D.C., March 28, 2025 — Today, the American Clean Power Association (ACP) released a comprehensive framework to ensure the safety of battery energy storage systems (BESS) in every community across the United States, informed by a new assessment of previous fire incidents at BESS facilities.

How can battery storage facilities be regulated?

In addition to working with fire officials and state policymakers to advance safety standards, the industry has developed a framework to help local governments effectively regulate the construction of battery storage facilities.

What is ACP's battery storage blueprint for safety?

ACP’s Battery Storage Blueprint for Safety outlines key actions and policy recommendations for state and local jurisdictions to regulate battery storage, enforce the country’s most rigorous safety standards, and ensure coordination on safety and emergency response in all communities.

What are the OSHA standards for lithium-ion batteries?

While there is not a specific OSHA standard for lithium-ion batteries, many of the OSHA general industry standards may apply, as well as the General Duty Clause (Section 5(a)(1) of the Occupational Safety and Health Act of 1970). These include, but are not limited to the following standards:

What are the hazards associated with a battery?

These hazards can be associated with the chemicals used in the manufacture of battery cells, stored electrical energy, and hazards created during thermal runaway, (see below) which can include fire, explosions, and chemical byproducts.

Are energy storage facilities safe?

“The energy storage industry is committed to a proactive and tireless approach to safety and reliability. At its core, energy storage facilities are critical infrastructure designed to protect people from power outages,” said ACP VP of Energy Storage Noah Roberts.

Energy storage pack level fire protection

To address this, the industry has developed a multi-level fire protection solution that includes PACK-level, Cluster-level, and Cabinet-level fire suppression mechanisms. These layers work in concert to provide comprehensive safety coverage and minimize fire risks.
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What is the NFPA 855 standard for stationary energy storage systems?

Setting up minimum separation from walls, openings, and other structural elements. The National Fire Protection Association NFPA 855 Standard for the Installation of Stationary Energy Storage Systems provides the minimum requirements for mitigating hazards associated with ESS of diferent battery types.

How do you protect a battery module from a fire?

The most practical protection option is usually an external, fixed firefighting system. A fixed firefighting system does not stop an already occurring thermal runaway sequence within a battery module, but it can prevent fire spread from module to module, or from pack to pack, or to adjacent combustibles within the space.

Can water spray be used on high-voltage fire suppression systems?

Water spray has been deemed safe as an agent for use on high-voltage systems. Water mist fire suppression systems need to be designed specifically for use with the size and configuration of the specific ESS installation or enclosure being protected. Currently there is no generic design method recognized for water mist systems.

What is a Li-ion battery energy storage system?

Executive summary Li-ion battery Energy Storage Systems (ESS) are quickly becoming the most common type of electrochemical energy store for land and marine applications, and the use of the technology is continuously expanding.

What are the NFPA 855 fire-fighting considerations for lithium-ion batteries?

For example, an extract of Annex C Fire-Fighting Considerations (Operations) in NFPA 855 states the following in C.5.1 Lithium-Ion (Li-ion) Batteries: Water is considered the preferred agent for suppressing lithium-ion battery fires.

How does a fixed firefighting system work?

A fixed firefighting system does not stop an already occurring thermal runaway sequence within a battery module, but it can prevent fire spread from module to module, or from pack to pack, or to adjacent combustibles within the space. The afected module is likely to be fully lost, but the adjacent modules can be saved.

Energy storage station lightning protection and grounding standards

For each of these, NFPA 780-2020 outlines unique protection guidelines, covering materials, grounding, bonding, concealed systems, corrosion protection, and various other protective measures.
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What is a lightning protection system (LPS)?

Lightning Protection System (LPS) whose air termination system and down conductor system are positioned in such a way that the path of the lightning current can be in contact with the structure to be protected. Minimum peak value of lightning current that will cause damage in a line. Permanent damage of electrical and electronic system due to LEMP.

What is lightning protection system design?

4.1.1 Lightning protection system design consists of the use of strike termination means, low impedance paths to ground, and earth electrode systems, coupled with bonding of all conductive penetrations into the protected area, surge suppression, and sideflash protection.

What is a lightning protection standard?

The standard thus sets out a defined set of lightning current parameters where protection measures, adopted in accordance with its recommendations, will reduce any damage and consequential loss as a result of a lightning strike.

Do I need an external lightning protection system?

Therefore the need for optimized and reliable electrical protection against the influence of lightning and surge events becomes mandatory. A risk assessment per IEC 62305-2 should first be performed to understand better if an external lightning protection system (LPS) is required.

Why do lightning protection ground systems need to be bonded?

4.3.9.1 Bonding of metallic bodies and lightning protection ground systems is required to ensure that voltage potentials produced by lightning currents are near-equal throughout the structure and no potential differences exist that would be sufficient to produce a sideflash inside or on the surface of the protected structure.

Do underground electrical service lines need a lightning current SPD?

Underground electrical service lines therefore do not have a requirement for lightning current SPDs where no structural LPS is present - overvoltage SPDs are sufficient to provide effective protection.