Unique systems, methods, techniques, and apparatuses of datacenter power supply systems are disclosed. One exemplary embodiment is a datacenter power supply system comprising an AC power bus structured to selectably receive AC power from an AC power grid and a AC generator and structured to provide AC power to one or more AC datacenter loads and an AC/DC converter, a DC power generation system structured to provide DC power to a DC/DC converter, a DC power bus structured to selectably receive power from the AC/DC converter and the DC/DC converter and to provide DC power to a plurality of DC datacenter loads, and an electronic control system structured to selectably control the datacenter power supply system to operate in plurality of modes.