Ok guys. Check this out. I've been playing with a 250w Thermal Take Power Express power supply. What this thing is, is an add-on power supply for a PC computer that fit in a 5.25" CDrom bay and provides 250w @ 12v regulated to power SLI or Crossfire graphics cards. 2 cards. A slot cover plate mounts in the computer to provide a 120v ac-in jack for a boom-box type power cable. This supply is normally activated when the main PSU turns on but if you don't connect the interface cable to the computer psu's atx connector, then it will always be on. It will power up with DC right to the ac input but it's better if you have the ability to open it and put your pack voltage straight to the main filter cap -after- the line rectifier. I've ran HID headlights as low as 48v input on the cap. Normally this cap sees about 150v. That makes 48-150dc input and 12v out but I would de-rate the output with voltages below 100v.
It's also fan cooled and ISOLATED and I've just discovered they make a 450w and 650 watt version!!!
Typical internet prices:
250w (rated 21a max) ~$50
http://www.thermaltake.com/product/P...0130/w0130.asp
450w (rated 30a max) ~$65
http://www.thermaltake.com/product/P...0157/w0157.asp
650w rated
30a max?) ~100 <---- 30a? It's twice as big as the 250 and 450 and takes up 2 bays.
http://www.thermaltake.com/product/P...0158/w0158.asp
This should make you guys very happy!
http://www.amazon.com/s/ref=nb_ss_gw...+power+express