Whistler XP600i Owner's Manual page 9

For example, the XP600i model has a maximum continuous rating
of 600 watts. Although this model has the capacity to briefly provide
more than its continuous power (that is, excess current), it is designed
to operate equipment and appliances with start up load requirements
of 600 watts or less.
Consequently, if the start up load rating of your equipment or
appliance slightly higher than the maximum continuous rating
of the inverter, the inverter will attempt to start loads above the
continuous rating.
To determine whether your inverter will operate a particular piece of
equipment or appliance, run a test. The inverter is designed to shut
down automatically in the event of a power overload. Testing appli-
ances and equipment with start up load ratings comparable to your
inverter wattage rating will not damage the inverter. If a piece of equip-
ment or an appliance will not operate, first confirm that the inverter has
been properly connected to the 12 volt power source (See "Making
The Connection"). If all connections have been properly made, turn
the inverter rocker switch ON (l), OFF (O) and ON (l) again in quick
succession. If this procedure is unsuccessful, it is likely that the inverter
does not have the required start up capacity to operate the equipment
or appliance in question.
NOTE:
• Most heat generating appliances require start up loads in
excess of 1000 watts and the inverter will not operate such
appliances as coffee makers, irons, hair dryers or heaters.
• The inverter's USB Ports do not support data communications.
INVERTER BASICS
7