LEWISTON — The Lewiston Auburn Metropolitan Chamber of Commerce will host a Power Lunch seminar from noon to 1 p.m. Tuesday, May 15, in the chamber conference room, 415 Lisbon St.

Nick Sampson, commercial and institutional solar consultant of ReVision Energy, will speak about how to power a house or business with clean energy. The newly installed solar array at Geiger will be used as a case study on the processes used to make a transition.

Power Lunches are sponsored by Community Health Options. The seminar is free but registration is required. Lunch will not be provided. Registration is available at www.LAMetroChamber.com. For information, call 207-783-2249.