Not bad, 60w power usage with all rectifiers installed, and 1 or 2 is around 30w. No load mind you but still not too bad. They sell high efficiency versions of these rectifiers that are compatible with this shelf. I presume that's why these were so cheap, some telcos probably been upgrading to HE versions.
Next step to buy/setup is power distribution and wiring. Bus bars, breakers etc. I read QO panels actually support DC... I might look into that route, but I can't find the QO DC breakers. i suspect the 120/240v rated ones are DC rated too though but don't want to chance that, Schneider seems to hint at that in the literature but it's not quite clear. They do actually sell DC rated breakers too, just no way to buy straight off their site.
If I go the bus bar route then I can do the same as I did for my shed solar and just use DIN mounted breakers.