[MLB-WIRELESS] Solar power modelling

[Ben Anderson]

Your pricing sounds about right to me.

a lot more than 10cm/10cm solar cell and half a car battery anyway :)

Ben.


> If thats over $1000 there, then its going to increase the cost a fair bit
> more when you run to AP's as a relay, which might be what people are
> considering doing(why run just one AP off solar ?? Whats it connected to
> ??).  Although I would still be interested in looking at some costing and
> analysis of what it would take to get it all up and running, but if I
> remember correctly from my homework a while ago it would cost about $2500
> for a full relaying solar powered setup.
>
> Matt.
>
>
> ----- Original Message -----
> From: "Ben Anderson" <a_neb at optushome.com.au>
> To: "Tony Langdon" <tlangdon at atctraining.com.au>; "'Fenn Bailey'"
> <fenn_b at smktech.com.au>
> Cc: <melbwireless at wireless.org.au>
> Sent: Thursday, April 03, 2003 4:00 PM
> Subject: Re: [MLB-WIRELESS] Solar power modelling
>
>
> >
> > Still talking over a thousand dollars for the power system...
> >
> > Ben.
> >
> >
> > > > > > From memory, Vak did this. They draw around 400mA I think.
> > > > >
> > > > > At what voltage?
> > > > >
> > > > > P = V x I
> > > > >
> > > >
> > > > Sorry, at their default voltage: 5V.
> > >
> > > Hmm, that's only 2W.  If you're going to use a 12V solar system, I'd
> > > strongly recommend using a switchmode regulator to bring the voltage
> down.
> > > That would probably save 50% power, compared to a linear regulator
which
> > > would dissipate (i.e. waste) at least 7/12's of the supplied power as
> > heat.
> > > A switchmode regulator should be 80-90% efficient.
> > >
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