[Yr7-10it] charging laptop off solar etc?

[Donna Benjamin]

Rob - I could lend you an XO if you want :)

I don't have the solar adapter though... I should try and get my hands
on one.

- Donna


On Fri, 2010-03-26 at 09:30 +1100, Costello, Rob R wrote:
> Hi Tony
> 
> thought you might have some ideas on this
> 
> i know the XO is designed for this but not a feasible solution in my case :)
> 
> i take your point on efficiencies - the steps in converting to AC and back to DC etc
> 
> sounds like still harder than i hoped
> 
> might need to look at generator
> 
> thanks
> 
> Rob
> 
> 
> -----Original Message-----
> From: yr7-10it-bounces at edulists.com.au on behalf of forster at ozonline.com.au
> Sent: Thu 3/25/2010 10:40 PM
> To: yr7-10it at edulists.com.au
> Subject: Re: [Yr7-10it] charging laptop off solar etc?
> 
> > hello all
> >
> > anyone know any good shelf solutions for charging laptops from solar etc?
> >
> >   (for extended usage over several days at location with no power)
> >
> > is adapter off  lead acid battery (ie stand alone car battery?)  a possible solution? - i know it works in car but not sure how it would last without recharging - instinct says laptop is a trickle feed so should be ok if battery was in good nic?
> 
> You will get 2-4 hours out of a car battery. A solar panel produces approximately the equivalent of 4 hours a day at its rated power so you would need quite a big panel.
> 
> All the efficiencies multiply, panel x battery x inverter x laptop charger x laptop battery so if each was 80% efficient theres still not much left at the end.
> 
> Need aggressive power management, minimum hard drive time, minimum backlight etc. A netbook might be lower power. The OLPC XO laptop has been designed specifically for this application.
> 
> Tony
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