[MLB-WIRELESS] Solar power modelling

[Matt Pearce]

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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