[Sammus]

I run a 450W psu but its only rated to 16A on the 12v rail... and it only outputs like 11.8 anway. certainly not enough for my 360W duo's max capacity :) I was charging 2x 3s packs at 4A the other day and the input voltage dropped down to 10, still worked, but is a little dodgy.

The duo accepts up to 28V input though so if yours can accept a higher voltage too it might be cheaper to get a higher voltage power supply, then it doesnt need to handle such extreme current