Hi John,
I followed the same website's advise and have been using an old 500w PS to run my chargers (same as your Accell 6) and it works awesome
Since I rarely charge anything above 3amps, I can attach a few chargers to it and be good......I have run 4 at one time, 2 Accells, an older Esky 2-4s charger and a simple 1amp 2-3s trickle charger.....haha, sounds funny but it works well.
I have since done up a couple more for some flying buddies
Good luck!
Ray