Iris Technology Operator's Manual
QuietPower 1800 (QP-1800) Doc 287.F701 / 100412
Page 33 of 56 Rev 12 APR 2010
3.8 Usage Guidelines for the QP-1800
When using the QP-1800 in vehicle installations, it
is important to understand that the vehicle battery
holds a limited amount of power from which the
QP-1800 inverter draws to supply voltage.
When the vehicle engine is running, the battery is
recharged and in most conditions the QP-1800 will
supply power as long as there is fuel to run the
vehicle engine.
In vehicle engine-off situations, the QP-1800
draws power from the battery which is limited.
Under even ideal conditions the typical capacity of a vehicle battery is
about 60 minutes (engine off condition). Cold Temperatures reduce
battery output severely and can shorten battery life considerably.
CAUTION
The vehicle battery can be discharged by inverter usage to the point of
insufficient power to start the vehicle rendering it inoperative. The
inverter should not be used for extended periods ( + 45 minutes) with the
vehicle engine off.
Since the condition of the vehicle battery is unknown it is recommended
that drawing from the vehicle battery alone be used for short periods of
time even with light loads.
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