On Sat, 2013-08-17 at 07:40 +0200, Tony Anderson wrote: > Hi, > > My point about the UPS is that an off-grid setup doesn't need one which > somewhat offsets the additional cost of supporting a hard drive.
Yea the cost savings can go towards a proper 12v deep cycle battery. > Currently the two schools in Lesotho are using MSI Nettop as school > servers. In the context of charging 30-100 XOs, the additional power > consumed by the school server is negligible. > > However, at the second school which charges the laptops using individual > solar panels, the school server takes a dedicated solar panel charging a > pair of car batteries. > > The big surprise was that the MSI does not boot on 12vdc. This required > adding an inverter (designed to charge laptops from a car battery). > Good to know, thanks. > I was hoping the Trim-Slice H would be suitable. I am concerned with its > fixed 1GB memory. The Utilite looked like a promising alternative, but > supports only SSD. We may have to wait for nettops based on the new > Atom technology for a one-box solution. In the meantime, the current > Atom based systems are doable in an off-grid deployment. > > By the way, the need for the school server is closer to 50 hours per > week than 24/7. Normally it needs to be booted only during the hours > when children are in school. > Valid point, that should be taken into account when calculating total power requirements. Jerry > Tony > > On 08/17/2013 06:21 AM, Jerry Vonau wrote: > > On Sat, 2013-08-17 at 05:49 +0200, Tony Anderson wrote: > >> >Hi, > >> > > >> >What is the disk capacity required by internet-in-a-box? > >> > > > 600-700 gigs > > > >> >The purpose of the server is to deliver the information not available > >> >from the internet. > >> > > > Yup, or when your offline. > > > >> >The cost of a UPS which is required for a system on the grid is $80-100. > >> > > > Think the issue is mainly about off-grid systems, those are usually 12v. > > What would be neat is if there was a power supply that you could replace > > in your standard PC that used 12v as the supply voltage. Anybody know of > > a manufacture that supplies one? I'd hate to see what the size of the > > battery pack and the recharging requirements needed of the > > solar/wind/<insert others> recharging system that would be needed to run > > such a beast. > > > >> >In my experience, there is need for one school server at a school > >> >supporting 30-200 XOs. > > Know of any low power devices that you might recommend for off-grid use? > > > > Jerry > > > _______________________________________________ Server-devel mailing list Server-devel@lists.laptop.org http://lists.laptop.org/listinfo/server-devel