2007 Energy Independence and Security Act – EISA
The Energy Independence and Security Act of 2007 was passed in December of 2007 and addresses minimum efficiency standards and standby levels for Class A external power supplies that are 250 watts and under. This law stipulates that external power supplies manufactured on July 1, 2008 and beyond meet certain minimum efficiency and standby criteria as defined below.
Minimum Efficiency Criteria
Active mode is defined as when a power supply’s input is connected to line voltage AC and its output is connected to a DC or AC load drawing a portion of the product’s power output. Depending on the power rating for the power supply, it must meet the minimum efficiency criteria outlined below.
Energy-Efficiency Criteria for Active Mode:
output power on adapter label 0 to < 250 watts
maximum power consumption in no-load mode ≤ 0.5 watts
Click here to view the offical Energy Independance and Security Act