2 x "HP DPS-1200FB A" power supplies; 2 x 220 Volt, 10 Amp (at least) switches; 1 x 3-pole inlet connector; 2 x 3-pole connector jack (goes into power supplies); 7 x 4mm round connector (use only high grade and no cheap stuff, should be rated according to the power you want to draw); Cable for internal cabling (same here, use high quality cable rated for at least 100 Amps)