FAQ: Will <insert PSU model> Power Supply work with my system?
It will also give you the output on all three rails of the PSU to allow you to make smart a PSU choice.
Run your setup through multiple power calculators and take an average. None of them are very accurate.
POssibly. A Lilliput will have an egg-shaped regulator. If you use that, you can wire directly to the battery. Also, Xenarcs have an internal regulator, so they can be wired directly to the battery.I ran a power calculator thing and it said I needed about 144 watts?
Same with the touch screen LCD (yet to order)... That just hooks straight up to the battery yeah?
There are other models of screens, but I can't say whether you can run them straight from the battery or not.