110VAC Outlet
Lead Driver
Joined: Nov 2005
Posts: 8,459
Likes: 4,955
Did you have the engine running when you checked the output?
Logistics Pro
Joined: Jan 2010
Posts: 4,100
Likes: 1,633
Yeah that 400 watt plugin is really only good for a mobile phone charger, maybe a chromebook/laptop charger. It might do a little more than that but I wouldn't risk it.
Cargo Master
Joined: Apr 2003
Posts: 2,058
Likes: 424
From: Too close to Houston
It works to charge my DeWalt batteries. Haven’t tried it for anything else and haven’t checked the voltage.
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More Turbo
Joined: Sep 2009
Posts: 537
Likes: 198
Nice, it won’t run my Makita 18v charger.
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Tuned
Joined: Aug 2020
Posts: 307
Likes: 85
Did you check the voltage with a load running? I multimeter in its own is not enough to activate the inverter. Mine has worked for small loads like a battery charger. I even ran a 300W crockpot off it to keep food warm going to a party a couple hours away.
Tuned
Joined: Dec 2021
Posts: 429
Likes: 126
I power a 110vac Harbor Freight air compressor and a laptop charger at the same time with the 400w in my Maverick. I'll try the F-350 and see if it's the same. I'm amazed it can restart the compressor at just under 80psi and pump up to 110psi. I tried a small freezer in the bed of the F-350 running a cord through the rear window but it overloaded and shut off trying to start the refridgerant compressor. ¡No Bueno!
Mountain Pass
Joined: Nov 2024
Posts: 180
Likes: 92
Back to your question, rms (root mean square) voltage should be 110. Given the info HorizintalHunter provided, its possible you used an average-responding multimeter, which can be wildly inaccurate when the waveform is not sinusoidal. A true-rms multimeter gives accurate readings in cases like this.
Logistics Pro
Joined: Jan 2010
Posts: 4,100
Likes: 1,633
I power a 110vac Harbor Freight air compressor and a laptop charger at the same time with the 400w in my Maverick. I'll try the F-350 and see if it's the same. I'm amazed it can restart the compressor at just under 80psi and pump up to 110psi. I tried a small freezer in the bed of the F-350 running a cord through the rear window but it overloaded and shut off trying to start the refridgerant compressor. ¡No Bueno!
Cargo Master
Joined: Jul 2011
Posts: 2,664
Likes: 971
From: Walpole, MA