The Lepa 1600 has 2 20 Amp rails and 4 30 Amp 12V rails.
I would imagine this to mean that the 2 20 amp rails are limited to 240 Watts each.
The problem this leads to is that 160 Amps at 12V is well over the 1600 Watt rating for the PSU. So, there is a limitation being obscured by the fact it has multiple rails.
The multiple rail business complicates a setup - so Lepa isn't as attractive to me.