Tripp Lite APS inverter/chargers feature higher overload ratings - up to double their rated capacities - which allow users to run a wider variety of equipment than typical competitors’ models do. Many devices (including tools and appliances) require more power to start up than they do to run continuously. Tripp Lite APS inverter/chargers accommodate these “peak” surge demands by delivering up to 200% of continuous output capacity for up to ten seconds or up to 150% of continuous output capacity for up to one hour.* For example, a 2000 W Tripp Lite APS inverter/charger will provide up to 4000 W of power for up to ten seconds to run heavy duty tools and motor-driven equipment. (* Actual duration depends on battery age, charge level and ambient temperature. Duration also depends on APS model; most models will provide 150% overload for up to one hour, but some models support this overload for up to one minute. Consult model specifications for details.)