Date: Mon, 29 Apr 2002 16:39:54 -0500
From: [EMAIL PROTECTED]
Subject: Solar Panels

There was some interest in using the Libretto with solar panels a 
while back. I think I might have found some that will work if the 
information I found is accurate. First I found out that the Libretto 
takes about a amp of current from the AC adapter when it isn't 
charging and is being used. Second I found that when the Libretto 
is off and charging it uses about .6 amp. Has anyone measured the 
current that can confirm these measurements? So with this I found 
some setups that might work. They provide about 1.2 amps or 
greater which would be enough to run but you'd really want to shut 
it off to charge otherwise it'd take about three days to fully charge 
the battery. In fact the libretto might not even charge when running 
since the method of terminating charge is when the current drops 
and the panel might not provide enough current to get over the 
limintation. Anyway two of the panels I found are sold by 
Realgoods. I think the url is 
http://www.realgoods.com

The first one is the Sun Catcher Professional part # 11586 cost 345
This one looks pretty good, it comes in a case and uses Kyocera 
solar cells. Should get 20 years of life from them. One advantage to 
this one is it comes with a voltage regulator which limits the panel 
voltage to 12 volts so you can simply plug in the auto adapter and 
use it. Under full sunlight they claim about 1.3 amps but from my 
experience with solar if they claim 1.3 you'll get 1.1 or so useable 
under full direct sunlight.

The second is a 10 watt panel that is sold with a prewired cigarette 
lighter socket. You'd need two of these. Cost is 129 for one and 
part # is 06-0384. They claim about .6 amps with one panel so a 
person is looking at about 1 amp useable under full bright sunlight. 
This one doesn't come with a regulator so a person would have to 
set something up since the panel is rated for 16.5 volts and might 
reach as high as 20 which would completely shutdown any aoto 
adapter 

The third is called the Notepower and like the Suncatcher comes in 
its own case. Its 250 and doesn't come with a regulator. That is 
sold seperately for an extra 100 bucks. It is rated like the others. I 
lost the companies name that sells it but will dig it up if anyone is 
interested.

All of these are packable and only weigh a couple pounds. 

John



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