Electric vehicle instrumentation
You would have to find the most efficient way to integrate a dependable 12V rail into the car, which probably means a discrete 12V battery and BMS, charged by a DC-DC converter.
All the equipment is standard 12V or 5V.
Search google for &quot;12 inch tablet with sim card slot&quot; or whatever size and features you want. If no sim, then you just have to pair it with bluetooth. Tesla has a 12.3&quot; screen so 12 will be fine.