I dont think you need a 24v battery if you get that converter.
I have found a 400W 24V ATX PSU which is surplus from a government public transport project using wireless internet access stations on trains and buses. Cost me US$200 for a piece. :-(
24V seems to be the standard for these big vehicles.
I intend to use this battery converter product http://www.switchedmode.com/993webs/3702-993.htm which is available from Farnell. This is a 400W output product. To drive 12V to 24V which the PSU can accept.
1. Do I need a 24V battery? 12V -> Converter -> 24V battery -> PSU
2. On the spec sheet, seems like it needs 9V nominal voltage before it cuts off. If I use a 24V battery in between, will my engine cut the PC power when I crank?
All theories welcomed.
You won't need a 24V battery if you use the converter.
Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
"If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."