You would still need a DC/DC converter, and if you do that you might as well just go from AC. You are thinking wall-wart type applications. I'm more along the

You would still need a DC/DC converter, and if you do that you might as well just go from AC. You are thinking wall-wart type applications. I'm more along the lines of infrastructure, lights and other permanently installed devices that can be designed from the ground-up to operate at 44v.