Technical FAQs 4

Why is auxiliary power supply important?

Fire safety systems, such as fire alarms, control panels and gas ventilation systems (if present). These auxiliary loads are essential for ensuring the safe and efficient operation of BESS projects. Therefore, providing a reliable power supply for these auxiliary loads is crucial. BESS Auxiliary Power Supply Circuit Design

What is the electricity cost for auxiliary loads?

The electricity cost for auxiliary loads depends on the energy consumption (kWh) and the pricing structure set by independent system operators or utilities. For example: • In ERCOT, the BESS auxiliary load must be metered separately from energy used for battery charging and is charged at the retail rate.

What is the rated voltage of auxiliary power supply?

For example, the rated voltage of the auxiliary power supply might be 400V, 480V, or 208V. The circuit must also be sized based on the peak auxiliary load of the selected BESS product and the specific project configuration. Each BESS product has a unique auxiliary load design and peak auxiliary load.

Do auxiliary loads need a power supply?

Therefore, providing a reliable power supply for these auxiliary loads is crucial. BESS Auxiliary Power Supply Circuit Design Most BESS products on the market require an external power supply circuit for their auxiliary loads, although some have built-in circuits and do not need an external supply.

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