Re: low power server question

["Steve" <steve@xxxxxx>]

or here http://www.steatite-embedded.co
uk/60watt-ups-enabled-dc-atx-psu-including-1-battery.html



even have motherboards with built in ups









-------Original Message-------



From: Jim Noble

Date: 12/02/2010 18:23:51

To: ukha_d@xxxxxxx

Subject: Re: [ukha_d] low power server question





On 12/02/2010 07:37, Robin Edwards wrote:

> 1: Some sort of UPS or battery device is needed that gets charged and

> sits between the x10 module and the server, correct? What type of

> device would do the job?

>



You could use a UPS, but I doubt it would achieve what you're aiming for

though - I'd be surprised if a UPS didn't add at least 20W to the load,

and there would be inefficiencies in the power conversion and storage.

You'd probably end up consuming >3x the power for 1/3 of the time.



If you used a DC power supply for the server, you could feed it from a

large battery though. For a 20W load running for 16 hours, you'd need

320Wh of battery capacity, which is only about 30Ah (absolute minimum).

There would still be /some/ inefficiencies though...



It's a shame there are no ATX power supplies with a UPS function (I.e.

battery connection on the DC side) readily available...



Jim








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