yes, thats the cheaper £39.95 inc. VAT one
Plugs directly into the motherboard ATX connector. This new 80W version generates up to 80 Watts of power from a 12V supply, at over 96% efficiency. Apart from the maximum power output, all other specifications are the same as the original 120 Watt version.
I.e
An attached cable harness provides two HDD and one floppy/slimline optical drive power connector. Cable lengths: from board to 12V DC connector is approx 25cm (9.75"); cable harness is approx 40cm (15.75") long.
it seems to have the advantage that its able to power
3.5 drives and floppy but needs 12v as input were the other can take anything from 6 to 26V.
but as 12V is car battery standard all round the world perhaps thats a better option and you can get cheap solar panels at that 12v rate very easy.
iv not looked into it properly yet but you would need larger (or more smaller)panels at the 12v rate to supply the required hourly rates to your battery pack for 24/7 use.
if your just going to use standard car battery power then its not a problem.
for the adventurous/Experimentation, theres also the PEM fuel cell
"
The fuel cell uses a Proton Exchange Membrane or PEM fuel cell. PEM Fuel Cells utilize the energy from the electrons given up by hydrogen ions (or protons) during the reformation of water across the membrane to run the car’s motor. The fuel cell is "reversible" meaning that it can both split water into hydrogen and oxygen, and combine hydrogen and oxygen into water."
educational kits
http://www.h-tec.com
(pictures to big so go click if you like)
http://www.h-tec.com/education/images/products/3011.jpg
Power: 15 W
Hydrogen production: 65 cm³/min
H x W x D: 140 x 180 x 120 mm
Weight: 460 g
Double - cell PEM electrolyzer stack, for production of hydrogen
from distilled water.
they do prototype industial units too so it could grow into a commercial self contained unit if your looking to grow the markets for better power cycles per hour for powering the likes of low power EFIKA, wireless MESH networks etc.
a simple overview Q&A of PEM
http://www.discoverthis.com/fuelcell-faq.html
http://www.h-tec.com/industrial/downloa ... tation.pdf
ill leave it upto someone else to find and post a super small wind turbine/battery pack just big enough to power an efika and/or a mesh wireless router.....
(sorry i cant seem to revert back the width since i put that large picture in , and i forgot the syntax for enclosing long urls, this will do perhaps?)