low power consumption laptops

[Matthew Dryer]

I am looking for advice re netbooks that have low power consumption, for 
use where the only source of power is solar.  Since I am normally a Mac 
user, I don't know much about netbooks.  Some of the discussion I've 
seen on this list talks about number of hours the battery lasts, but 
that's not necessarily the same as low consumption, since one can 
imagine a laptop whose battery lasts longer than another laptop (because 
it's a good battery), but which still consumes more energy.  However, I 
don't know if this difference is in practice real; maybe it turns out in 
practice that number of hours a battery lasts is a good measure of 
energy consumption.  Does anyone know the answer to that?

Someone said a few months ago "The best bit about the netbook is that 
19V models, as i've said, will run happily in a 12V DC environment 
without the need for inversion".  Does this mean one doesn't need an 
adaptor?  I find this attractive since with my Macs I have had a lot of 
bad luck with adaptors for use with 12V DC failing.  And I can't find 
any information online about 19V netbooks.  Can anyone recommend a 
specific model like this?

Thanks,

Matthew