Inverter FAQs

An inverter converts DC power from an external power source into AC power.

• What size of inverter do I need?
• How long can I operate my inverter?
• Can I use my computer with an inverter?
• Is it possible to run an air conditioner on an inverter?
• Should I leave my inverter ON or OFF when shorepower is available?
• What is automatic AC transfer switching?
• Using a polarity tester with an inverter
• Can I install the inverter without a fuse?
• Remote on/off switch for Prowatt and Portawattz
• Voltage measurement issues (AC output)

When I check the 115 volt output of a Xantrex inverter with a three light polarity tester, all three lights come on.  There is no fault description for the tester covering this.   My ground fault outlets do not trip.  Is there a problem?

No.  What you are seeing is normal if you are testing the output of a Modified Sine Wave (MSW) inverter.  The device you’re using is for use with household utility power; the internal wiring of the inverter causes this symptom. 

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