Duracell Digital inverter 400 Owner's Manual page 31

Problem: Inverter will not deliver 400 watts.
Possible Cause
The inverter is connected to a
lighter socket which is fuse
limited to 180 watts with the
lighter plug cable .
The battery does not produce
enough volts to supply the
inverter with sufficient power.
26
Solution
Replace the lighter socket fuse with a
similar one as recommended in your
vehicle's manual and follow the section,
"Connecting for loads over 150 W", for AC
products rated more than 150 watts.
Turn vehicle on and then connect the
inverter directly to the battery using the DC
cable with clips.