MEC-A Systems Innovations. Based in Madison, WI, our dedicated team at MEC-ASI built the ultimate off-grid freedom machine. Ditch gas and propane forever with the portable 1400W MEC-A Tri-Power, a rugged 2x2ft powerhouse for off-grid living, boats, and emergencies. You get 24/7 reliability: the 12V battery bank saves your solar and wind energy for when the weather turns, while the water turbine can stay deployed to constantly generate fresh power day or night.