Guest
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 Posted:
Thu Jun 16, 2005 10:34 pm Post subject:
Re: Industrial Power Over Ethernet (PoE) Switch by GarrettCo |
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"J. Clarke" <jclarke.usenet@snet.net.invalid> wrote:
| Quote: | Why would the power supply cost $1/watt? PC power supplies typically go
around 20 cents a watt or so, with multiple output voltages.
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Because it's not a PC supply made in the bazillions, but a (somewhat
custom) 48V supply made for a specific purpose, with far less volume
and (as of now) very little competition. When PoE gets popular and
everyone has dozens of PoE peripherals in their house, it'll be a lot
less, but at this point, random power supplies (and other power
electronics, like inverters, battery chargers, solar grid-tie boxes,
etc) are on the order of a buck a watt. |
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