Several electric utilities have looked at what happens to energy use when individuals either buy Individual House Display (IHD) units for their homes or volunteer to use devices donated by the utilities.

FORBES: Paying Attention To Energy Use

First, there is the value of pro bono volunteer service to the individual and the practical skills acquisition for employees.

FORBES: Pro-Bono Service as a Competitive Edge

Under the FLSA, a volunteer will not be considered an employee if the individual volunteers for public service, religious or humanitarian objectives, and without contemplation or receipt of compensation.

FORBES: Using Volunteers and Interns: Is It Legal?