Olin Lathrop wrote:
> Tobias Gogolin wrote:
> 
>>Hi everybody I am looking for a ~ 400 Watt power supply for my
>>computer that can work on 120V AC [grid] as well as on my 120V DC
>>Battery Bank at my ranch!
> 
> 
> Probably most can, although you wan't likely find that in the spec sheet.
> Fortunately, these things are cheap.  Get one that is "auto ranging" and
> specified to work over the full range of world grid voltages, usually
> something from 90-260 VAC, 50-60Hz.  Make sure it has the CE logo, which
> most will anyway.  That guarantees it has a PFC front end at that power
> level, making it even more likely that there is a full wave bridge
> immediately after the power input.

I was going to say the same thing, but Olin beat me to the post.

As for why he has 120VDC, obviously using DC power for his
light bulbs in an off-grid solar power system.

So how well do CFL work on DC?

The PSU you already have will likely work.
If it doesn't start up, you know it needs more than 120VDC internally.
At worst, it will just blow the primary fuse since DCOK signal
will never be asserted, so the computer won't come out of reset.

I assume you looked at your monitor as well?

Robert
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