A joule rating is a unit of energy. Joule ratings are given on UPS systems and surge protectors to provide an idea of how much surge protection they provide. CyberPower units list the joule rating of each outlet. Many times you will see the total joule rating (number of outlets x rating for each outlet) listed as the joule rating for the unit. Look for units that provide joule ratings of 400 or greater to insure exceptional protection for your system.
the energy that a device is capable of directing away from the load in the event of a spike, surge or transient.
Surgical measurement of laser energy