User`s manual

Sine Wave

Inverter

Battery

AC Appliance

400W DC to AC Power Inverter by Wagan Tech

User’s Manual—Read before using this equipment

Wagan and wagan.com are trademarks used by Wagan Corporation.

RECOMMENDATIONS

• If the power inverter makes a beeping sound, turn OFF the power

inverter, disconnect all appliances from inverter and disconnect the

inverter from the power supply. The beeping sound is the low battery

warning, which indicates that the voltage of the battery power supply is

getting low. Please restart the vehicle engine to charge to battery before

using it to operate the power inverter again.

• When you are not using the inverter, turn the power switch to OFF and

disconnect the inverter from power supply.

• Disconnect the inverter when starting the vehicle’s engine.

BATTERY CONNECTION

If you choose to connect the inverter directly to your battery terminals, it is

important to connect with the right polarity: Connect (+) from the inverter to (+)

of battery terminal and connect (−) from inverter to (−) of battery terminal.

MEASURING THE AC VOLTAGE

This inverter’s AC output is a modiﬁed sine wave (MSW) 115 volts AC. The

comparison of modiﬁed sine wave and household AC is shown in the ﬁgure

below.

PRODUCT USAGE DIAGRAM

This modiﬁed sine wave has a root mean square (RMS) voltage of 115 volts.

Most ordinary AC voltmeters are calibrated to read “average” voltage and

assume that the AC waveform will be a pure sine wave. These meters will not

correctly read MSW voltage, and will display about 20 to 30 volts too low.

Any multi-meter identiﬁed as “TRUE RMS” will accurately read MSW correctly

HINTS

Adding an Extension Cord

If you need an extension cord, we recommend the use of an extension cord

between the AC output of the inverter and the AC appliances. You may use up

to 100 feet of high quality extension cord. A long cord will result in reduced

output power.

Buzz in Audio Systems

Some stereo systems and “boom boxes” will emit a buzzing noise from their

loudspeakers when operated from the power inverter because the power supply

in the device does not adequately ﬁlter the modiﬁed sine wave produced by the