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On 06/03/13 17:15, Gordon Henderson wrote: > On Wed, 6 Mar 2013, Richard Brown wrote: > >> Hi Guys >> >> I have been looking at running the youth project completely off-grid. >> We have obtained 4 solar panels and 2 large batteries. We hope to be >> able to run a couple of computers along with wifi router off this >> system. The obvious answer will be Raspberry PI. But does anyone know >> of any computers that will run off a 12 volt system please? Does >> anyone know of a low powered router or should we use a USB dongle? >> >> Does anyone fancy a lug day at the woods to possibly help set up the >> PI or other computers etc? More than happy to provide food etc. > > I think you'll find that it's not obvious at all. > > Start by working out how long a car battery will run a Pi for. Assume > 3 watts for the Pi. > > Then add on anything else - display, even LEDs, Wi-Fi, etc. > > Use cables for real low power. > > Then work out the average days of full sunshine - you'll need double > the consumption to charge batteries and power the Pi's etc. > > You might find it's not that viable for anything other than a few days > in the middle of summer... > > Gordon > What about powering monitors / displays ? Paul -- -- http://www.zleap.net skype : psutton111 http://www.linkedin.com/pub/paul-sutton/36/595/911 http://www.raspberrypi.org http://www.ubuntu.com I am committed to safeguarding children, young people and vulnerable groups and expect any school or establishment I am involved with to share this commitment. -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq