MONTANA Series Generators M5 are Tier 4 final EPA compliant and built on a proven platform of emissions control technologies. Our silent portable generators are engineered to operate in the most challenging environments and can meet any application. With standard models ranging from 169 kVA to 225 kVA, and the ability to customize any units to fit any need, innovative sound reduction technology makes machine quiet enough to provide power for all-important special occasions. Because Grandwatt generators are dependable and easy to operate, they are the correct choice for all of your power needs.