Design requirements for fire extinguishing systems in energy storage stations

What are the fire and building codes for energy storage systems?

However, many designers and installers, especially those new to energy storage systems, are unfamiliar with the fire and building codes pertaining to battery installations. Another code-making body is the National Fire Protection Association (NFPA). Some states adopt the NFPA 1 Fire Code rather than the IFC.

What are fire codes & standards?

Fire codes and standards inform energy storage system design and installation and serve as a backstop to protect homes, families, commercial facilities, and personnel, including our solar-plus-storage businesses. It is crucial to understand which codes and standards apply to any given project, as well as why they were put in place to begin with.

Why are building and fire codes important?

Before diving into the specifics of energy storage system (ESS) fire codes, it is crucial to understand why building and fire codes are so relevant to the success of our industry. The solar industry is experiencing a steady and significant increase in interest in energy storage systems and their deployment.

What are non-residential storage requirements?

For storage capacities that exceed these limits, non-residential requirements come into play (NFPA 855 Chapters 4-9). Fire detection, including smoke and heat alarms, vehicle impact protection with approved barriers, and ventilation requirements for chemistries that produce flammable gas during normal operation are addressed.

What is the maximum energy rating per ESS unit?

The maximum energy rating per ESS unit is 20 kWh. The maximum kWh capacity per location is also specified—80 kWh when located in garages, accessory structures, and outdoors and 40 kWh in utility closets or storage spaces. For storage capacities that exceed these limits, non-residential requirements come into play (NFPA 855 Chapters 4-9).

How far apart do ESS units need to be installed?

ESS must be listed and labeled in accordance with UL 9540 and installed per the manufacturer’s instructions. A minimum spacing of 3 feet is required between ESS units unless 9540A testing allows for closer spacing. ESS location requirements are detailed for areas including garages, accessory structures, utility closets, and outdoors.