I have lived on my boat in Western Mexico for the last two years. We follow the 85 degree temperature line, going as far south as Acapulco during the winter and as far north as Puerto Refugio (north end of Isla Angel de la Guarda) during the summer. That's about 1100 nautical miles.
What is the "Targus voltage controller adapter" - I visited the Targus site and found only 12V-19V adapters and inexpensive inverters. I currently have two Targus 12V-19V adapters on the boat. I also have a 300 watt inverter and a 2kW inverter.
Are you suggesting I rewire a SFF box, e.g Shuttle, to run directly off the boats 12V (actually 12.4 to 14.4V) power? if so - how would I do that? The boats batteries are high amp storage devices but the voltage available on the main bus at the breaker panel varies from 12.4 to 14.4. Would that variability hurt the alternate powersupply (Boat DC to 3.3,5,12V in the Shuttle)?
I have been using laptops on Mirador (my boat - visit http://www.svmirador.net
to see thousands of pages of writing and pictures) for nine years. The problem with laptops is that I can not repair them at the board level. I keep the laptops in dry (no splashing water) but the ambient atmosphere can be very damp. In Mexico the ambient temp is 85 to 105 degrees with humidity varying from 15% to 99%.
The laptops develop corrosion fingers on the boards within 12 to 18 months and are way too expensive to repair. I am thinking that I can repair an SFF PC at the board level for a lot less than a laptop.