Standard Features KOHLER Co. provides one-source responsibility for the generating systems and accessories Three year limited warranty covers all generator systems and components and one year limited warranty covers the trailer Easy valve system to switch between propane and natural gas fuel sources. Optional on-board LP fuel tank 978L (258 gal.) provides 24 hours of run-time at 75% load Sound level of 69 db(A) @ 7 m (23 ft) at full load prime rating 110% environmental containment of oil and coolant; fluid containment not needed for optional on-board fuel tanks as propane will evaporate at atmospheric pressure eliminating the potential for ground spill Kohler’s DEC3500 digital controller is encapsulated for protection against vibration and environmental conditions, auto senses voltage eliminating the need to program voltage changes and includes paralleling functionality