Ok. I see the input range on the M1 ATX is 5.7 to 30. I'm assuming then that the input range on this is 11.4 to 12.6, which wouldn't work.
Now I'm just confused because this is allegedly a car PC pull. It's a solar system solarpc JD2500. I thought it was a steal at $56 US with the power supply, but if I need to buy a Carnetix then I'm totally over-budget and will have to put the project on hold for now.
Thanks for you help though.
EDIT: Got a response from the seller: Power is a regulated power switched supply. It has a delay circuit for voltage bounce if you have to crank car on off. Hook straight to ignition, just fuse 10a inline.