Re: [bolger] 12 volt power supply
- Here is another 12 VDC input internal power supply for a PC, very nice:
Efficiency is rated at 70%, so if your PC wants 100 (of the supply's 200)
watts, for example, the power supply needs 12 amps, with 3.5 amps wasted
Keypower also lists a conventional AC->DC PC supply at 70%, so assume it
will also waste a similar number of battery amps. Good inverters list
efficiencies from 75% (Trace) to 97% (Invertrix, I don't believe it), and
cheapo inverters, I think, appear to be 50-60%. I know a little 100 watt
cheapie I had would keep your coffee warm. Anyway, I would think an
inverter setup would double your loss.
Of course, the best plan is laptop, which probably runs on 50 watts anyway.
The last two I have had, however, conveniently run on 16 and 19 VDC, so
you are still stuck with an inverter.
At 09:06 AM 12/2/2000 -0800, you wrote:
>I am sending this from a "12 volt power supply" - that is a battery bank
>that runs an inverter. In this case, the inverter is a large trace that
>makes a square wave. It works fine, and in fact powers our whole household
>including a computer based business that my wife runs. However, since your
>pc only needs 100 to 150 watts, a smaller inverter that makes a "sine wave"
>would be best. They are not too expensive. If your computer is a smaller
>laptop, one of the little convenience plug in inverters would work. i have
>one that I might be willing to ship you to try. Calling a local vendor tho
>sells photovoltaic pannels will get you going, but gather some prices as
>they vary greatly.
>> greetings from south america,
>> I wonder if anyone has information on 12volt power supplies for
>> pentium computers, suitable for marine use..
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>- no cursing, flaming, trolling, or spamming
>- no flogging dead horses
>- add something: take "thanks!" and "ditto!" posts off-list.
>- stay on topic and punctuate
>- add your comments at the TOP and SIGN your posts