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Power inverter?

360 Views 5 Replies 4 Participants Last post by  EntropyTTU
Well, the economy has brought me to my knees here in michigan, and it looks like i may be driving OTR. I want to bring my computer with me, and will have plenty of space.

My question is, with running a 750w PSU, PHII, two 4870s, 2 optical drives (which could be reduced to one) two HDD in RAID, and a 22" monitor (flat panel) what size power inverter am i looking at? Would this system even run off of a power inverter?
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The question will be can your vehicle's alternator handle it. Thats a lot of juice, I would consider pulling one of the 4870's honestly. But can you buy an inverter...yes...you can buy one that will power your house if you want. Check what that alternator's output first.
The alternator output will not be an issue. Its going in a Semi-truck :)

I just dont know how big of an inverter ill need
I think you answered your own question when you said you had a 750w PSU - I think you have to increase that by 20% which would put you at 900watts Like this one: http://www.amazon.com/Motor-Trend-13.../dp/B001B4DQP0 for $65
Note: most of these require direct cable to the battery - NOT the cigarette lighter.

EDIT: just noticed the monitor - my 22" acer uses 1.5amps = 180watts so add that as well.
Yeah I think I would look at like a 1500w or 1750w I know I have seen those before.
Quote:


Originally Posted by emersonsc

The alternator output will not be an issue. Its going in a Semi-truck :)

Yeah, but regardless of whether the requirements of the diesel are 1W or 1Mega watt, the alternator may not be designed for an extra, lets assume worse case 700W.

Get what I am saying? You blow the alternator on an 18 wheeler, and you may just lose your job, or you could spend $1000 or more repairing it.

I not trying to totally shoot down your idea here, were I in the same situation, believe me I would be looking to carry my PC also. However, you should SERIOUSLY look at the specs on the alternator first.

For example: Average Current capability of the alt. of and 18 wheeler = 200A, Current requirement of the truck AVERAGE = 150A (this I do not know for a fact, but it is just an example), with maybe an extra 25A consumption under worse case scenario, i.e. hauling, up hill, current surges, etc....

That leaves you 25A, to work with. Worse case scenario, your computer consumes 700W/12V = 58.33A. Never mind the fact that any inverter will not be 100% efficient in the conversion process, and it too will consume power. Add, lets say 10A, at 12V that is 120 watts.

So, 120W + 700W = 820W to run a 700W computer. That would be an extra 820W/12v = 68.333A required from an the alternator.

As stated, better hope someone seriously over spec'd the alternator.

Quote:


EDIT: just noticed the monitor - my 22" acer uses 1.5amps = 180watts so add that as well.

There is no way that monitor consumes 180W, something is not right.

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