Definitions.
ANSIAmerican National Standards Institute.
BATTERY ENERGY STORAGE MANAGEMENT SYSTEMAn electronic system that protects energy storage systems from operating outside their safe operating parameters and disconnects electrical power to the energy storage system or places it in a safe condition if potentially hazardous temperatures or other conditions are detected.
BATTERY ENERGY STORAGE SYSTEMA physical container providing secondary containment to one or more battery cells for storing electrical energy derived from solar or directly from the grid that is equipped with cooling, ventilation, fire suppression, and an electronic battery management system. It may be a primary use or accessory to a solar energy facility, power generation facility, an electrical substation, or other similar uses. A battery energy storage system can be classified as a Tier 1, Tier 2, or Tier 3 battery energy storage system, as follows:
(1) Tier 1 battery energy storage systems are defined as building-integrated battery energy storage systems that have an aggregate energy capacity less than or equal to 80 kWh and whose purpose is to store energy produced for on-site consumption, and if in a room or enclosed area, consists of only a single energy storage system technology. The facility must comply with the Massachusetts Electrical Code (527 CMR 12.00) and the Massachusetts Fire Code (527 CMR 1.00).
(2) Tier 2 battery energy storage systems are defined as those that are interconnected to utility distribution lines and have an aggregate energy capacity less than or equal to 10 megawatts. The facility must comply with the Massachusetts Electrical Code (527 CMR 12.00) and the Massachusetts Fire Code (527 CMR 1.00).
(3) Tier 3 battery energy storage systems are defined as those that are interconnected to high voltage transmission lines and have an aggregate energy capacity greater than 10 megawatts. The facility must comply with the Massachusetts Electrical Code (527 CMR 12.00) and the Massachusetts Fire Code (527 CMR 1.00).
BATTERY(IES)A single cell or a group of cells connected together electrically in series, in parallel, or a combination of both, which can charge, discharge, and store energy electrochemically. For the purposes of this law, batteries utilized in consumer products are excluded from these requirements.
CELLThe basic electrochemical unit, characterized by an anode and a cathode, used to receive, store, and deliver electrical energy.
COMMISSIONINGA systematic process that provides documented confirmation that a battery energy storage system functions according to the intended design criteria and complies with applicable code requirements.
DEDICATED-USE BUILDINGA building that is built for the primary intention of housing battery energy storage system equipment, is classified as Group F-1 occupancy as defined in the International Building Code, and complies with the following:
(1) The building's only use is battery energy storage, energy generation, and other electrical grid-related operations.
(2) No other occupancy types are permitted in the building.
(3) Occupants in the rooms and areas containing battery energy storage systems are limited to personnel that operate, maintain, service, test, and repair the battery energy storage system and other energy systems.
(4) Administrative and support personnel are permitted in areas within the buildings that do not contain battery energy storage system, provided the following:
(a) The areas do not occupy more than 10% of the building area of the story in which they are located.
(b) A means of egress is provided from the administrative and support use areas to the public way that does not require occupants to traverse through areas containing battery energy storage systems or other energy system equipment.
RATED NAMEPLATE CAPACITYThe maximum rated output of electric power production of the energy storage system in alternating current (AC).