5 FAQs about Mali BESS Uninterruptible Power Supply

What is a battery energy storage system (BESS) & an uninterruptible power supply (UPS)?

Figure 1: A simplified project single line showing both a battery energy storage system (BESS) and an uninterruptible power supply (UPS). The UPS only feeds critical loads, never losing power.

What is an uninterruptible power supply (UPS) system?

Courtesy: Affiliated Engineers Inc. Uninterruptible power supply (UPS) systems have been a familiar presence for years, known for their ability to enhance power quality and offer continuous power for critical loads. These systems typically supply power for a few minutes while the generator starts up.

What is the difference between Bess and ups?

UPS is focused on providing immediate, short-term power backup during interruptions, ensuring continuous operation of critical systems for a limited duration. BESS is designed for long-term energy storage and management, supporting renewable energy integration and providing power over extended periods.

Does a fire barrier need a standby power source?

If accessory power is needed for heating, ventilation and air conditioning (HVAC), ensure it comes from a source recognized as “legally required standby” under NEC 701. IFC 1207.7.4 stipulates a two-hour fire barrier separation requirement if the BESS is installed inside a building that is not dedicated for its use.

Do kilowatt-hour limits apply if a Bess is a “dedicated use” building?

If the BESS is in a “dedicated use” building compliant with IFC 1207.7.1, then the kilowatt-hour limits outlined in the table do not apply. This exception is beneficial, especially considering that 600 kWh of energy capacity is approximately equal to a small portable diesel generator's belly tank capacity.

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