determine the battery capacity of a system having a daily energy requirement of 360 watts hours

1. The amount of time that the system will be operating each day: This will determine how much energy the system will need to be able to store in order to meet its daily energy requirement.
2. The efficiency of the battery: This will determine how much of the stored energy will be available for use by the system.
3. The depth of discharge (DOD) of the battery: This will determine how much of the stored energy the battery will be able to deliver to the system before it needs to be recharged.

Based on this information, the battery capacity of the system could be calculated using the following formula:

Battery capacity = Daily energy requirement / (Operating time x Battery efficiency x DOD)

For example, if the system will be operating for 8 hours per day, the battery has an efficiency of 80%, and the DOD of the battery is 50%, the battery capacity would be calculated as follows:

Battery capacity = 360 watt-hours / (8 hours x 0.8 x 0.5)

Battery capacity = 360 watt-hours / (3.2 watt-hours)

Battery capacity = 112.5 watt-hours

Therefore, the battery capacity of the system would be approximately 112.5 watt-hours.