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Old 06-16-2019, 07:41 AM
 
Location: In a vehicle.
5,342 posts, read 3,415,943 times
Reputation: 8737

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I have a 80 watt inverter for van, runs two fans, Start up is up to 200 watts.

The fans are 5 volt, 3 W When one is running, normal power to fan, starting the second one, causes power drop to both.

The inverter has a USB plug, 5 VDC 500 mA Am I overloading it? (The USB plug)??
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Old 06-16-2019, 08:36 AM
 
Location: (six-cent-dix-sept)
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not really sure but: 5v x .5a = 2.5w .
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Old 06-16-2019, 09:29 AM
 
Location: Baker City, Oregon
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Are you sure the fans are only 3 watts? What sort of fans are they?
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Old 06-16-2019, 09:43 AM
 
Location: In a vehicle.
5,342 posts, read 3,415,943 times
Reputation: 8737
Quote:
Originally Posted by karlsch View Post
Are you sure the fans are only 3 watts? What sort of fans are they?
There's the sticker on the back says 5V-3W

https://www.walmart.com/ip/MAINSTAYS...IN-1/571513898

Last edited by Disgustedman; 06-16-2019 at 10:49 AM..
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Old 06-17-2019, 11:55 AM
 
Location: In a vehicle.
5,342 posts, read 3,415,943 times
Reputation: 8737
Well, found that the one USB connector couldn't deliver enough. Used the plug in section and powered both fans....Such great help.
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Old 06-24-2019, 01:07 PM
 
6,020 posts, read 2,748,363 times
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Well, 3W/5V = 0.60A each. x 2 = 1.2 A. Your power source says 0.5A. No gonna workee.

Ohm's Law, baby!
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