NABCEP NABCEP Battery Storage Installation Professional 2

Question 1

What document establishes the maximum allowable energy capacity of battery energy storage systems installed in residential occupancies?

Accepted Answer

NFPA 855 Standard for the Installation of Stationary Energy Storage Systems

Answer

NEC Article 690

Answer

UL 9540 Product Standard

Answer

IBC Structural Code

Question 2

When sizing a battery storage system for self-consumption optimization, what load data is most critical?

Accepted Answer

Historical hourly load profile of the facility

Answer

Utility company's peak demand time only

Answer

The nameplate rating of the largest appliance

Answer

Annual average daily kWh usage

Question 3

What is the purpose of a rapid shutdown system in a PV-coupled battery storage installation?

Accepted Answer

To reduce PV and storage system voltage to safe levels for first responders within a specified time

Answer

To accelerate battery charging

Answer

To disconnect the battery from the load panel only

Answer

To reset the inverter after a fault

Question 4

In a DC-coupled battery storage system, where is the battery typically connected?

Accepted Answer

Between the PV array and the inverter on the DC bus

Answer

On the AC output of the inverter

Answer

After the utility meter

Answer

Directly to the main service panel

Question 5

What is state of charge (SoC) in a battery energy storage system?

Accepted Answer

The percentage of available capacity currently stored in the battery

Answer

The rate at which the battery is being charged

Answer

The number of charge cycles completed

Answer

The battery's nominal voltage rating

Question 6

Which battery chemistry is currently most common in utility-scale and residential energy storage systems in the US?

Accepted Answer

Lithium iron phosphate (LFP) and other lithium-ion chemistries

Answer

Lead-acid

Answer

Nickel-cadmium

Answer

Flow vanadium