Which UPS?

[Stewart Russell]

On Mon, Jun 11, 2012 at 11:30 AM, William Muriithi
<william.muriithi-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
>
> Good point,  the problem though is that all computers expect A/C, so unless
> the computer industry agree to provide a DC input point to all laptop and
> servers, how would the UPS industry achieve that?

Any domestic DC system much above 12V is going to be looked at askance
by ULC and any other certification body. DC arcs don't quench, so the
approvals people have traditionally considered DC to be a fire risk.
This is changing, partly because domestic solar systems for MicroFIT
are suddenly causing a whole lot of 600V DC systems to be installed on
people's roofs.

cheers,
 Stewart


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