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03/5/2016 at 11:21am
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Inverters are very power hungry, I would say 150watt is as big as you can go for running of a car fag lighter socket, a 150watt inverter will draw around 10amp as inverters makers always over egg the power rating.
Remember most car 12v outlets are fused at 10amp, although more and more are now 20amp especially for cars that don't carry a spare wheel.
For sensitive electronics it's best to go for a Pure Sign Wave inverter not the cheapy Modified Sine Wave type.
For the laptop, I would use a 12v step up supply, not quite an inverter but will up the 12v to say 22v that the laptop runs of, these type of units often have a selectable voltage output, and adapters to fit the laptop DC socket.
I use one in car for my laptop and 16v satellite meter when on charge.
If you really must go down the inverter route, get something with a decent power rating say 500watt and Pure Sign Wave, of course such an inverter would have to be connected directly to the battery, downside is that run time is limited to battery capacity.
I don't favour inverters at all, probably there best use is when built into a petrol suitcase generator like the Honda EU i200.
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04/5/2016 at 7:27pm
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I run the laptop of a 12v laptop adapter, simple device that ups the voltage from 12v to say 22v, the unit has selectable voltage upto around 24v, and comes with the various adapters for the differing laptop DC connection.
iPad's etc can be run of fag lighter USB adapters, the decent ones can do 2amp or more.
I don't find the need for an inverter, as there is usually a work around for low amp mains stuff.
Add to that, the fact that a high power inverter need to be connected directly to the car battery, otherwise the car auxilary 12v socket fuse would blow at 10amp, although many cars are now rated to 20amp.
So I guess the question is, do you really need an inverter, I once did when I needed to run a Sky satellite box from the car, for that I used a £20 150watt Modified Sine Wave inverter, there was no other solution until I got hold of a Sky Mini-Box which was 12v.
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Topic: Inverter
