Whistler HIGH SURGE POWER INVERTERS Owner's Manual page 14

INVERTER INFORMATION
start up load ratings comparable to your inverter wattage
rating will not damage it.
If a piece of equipment 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 or
your battery supply isn't large enough to operate the
equipment or appliance in question.
Selecting the Optimum Power Source.
Operating the inverter for extended periods combined with
a high continuous load demand may result in excessive
power drain from the battery. Therefore, the reserve capacity
of the battery you select to power the inverter is an
important consideration.
The potential power drain can be estimated by calculating
the reserve power ("amp/hour") of the battery and the
amps required by the inverter to meet the continuous load
demand of the equipment or appliance being operated.
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