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Question

Laptop power supply buzzing when using power inverter

Feb 24, 2016 5:15PM PST

I'm wanting to use my laptop in my car. I have a 100w/1000w cat professional inverter. Sadly my laptop uses to much power for the 100w so I have to connect the inverter directly to the battery for the 1000w. It works fine, but my laptops power supply makes a slight buzzing sound. Is this something I should worry about. It doesn't make the sound when the inverter is plugged into a 12v outlet in 100w mode but laptop won't power on unless car is running and the inverter can only go about 5min before kicking in low voltage when set to 100w.

Discussion is locked

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Answer
TRUE!!! You want a better inverter.
Feb 24, 2016 5:21PM PST
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Will this be ok for now
Feb 24, 2016 5:42PM PST

I'd be looking at a 400-500 watt I know, which I can't afford at the moment. Will it hurt the power supply to use the cat for now?

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I would not use it.
Feb 24, 2016 5:53PM PST

The square wave or chopped wave models can be hard on gear. My bet is the laptop maker will void your warranty on the adapter or laptop.

Sorry that I only gave you a 200W search but you can change it to what fits your needs. My choice is 2 times peak power. Here's a video of the sounds.

https://www.google.com/#q=square+wave+inverter+fan+noise&tbm=vid and other web searches are plentiful.