This just came in the mail today:
5x 48v 20 amp Eltek Valere V1000A rectifiers. Only really needed like 2 but per unit it was cheaper to buy the lot of 5 and now I have spares. Still waiting for the shelf that will accept them, that's on the way as well.
This is part of a major power overhaul I'll be doing in my server room eventually. Had been watching ebay on and off and came across two listings, this one, and one for the compatible shelf, so went for it. Total came up to $572.99.
I figure each rectifier can do 1,080w at 54v if the 20a rating is throughout all voltage ranges so just one is more than enough for my whole rack, including my two workstations which I'll also be adding to that system. I will run 3 for redundancy since the shelf takes 3.
This on it's own might end up being the cheapest part of the upgrade though since I still need to buy the batteries and the inverters and all the wiring/fuse blocks/breakers etc but I was glad to find this as it's the hardest part to source out. You can't just buy this sort of stuff new as a regular consumer.
End goal is to pretty much run all important stuff off this system and also add solar power to it once I setup the automation for that. My current server setup is a 12v 750w inverter-charger and it's worked fine but I've been wanting to go 48vdc dual conversion for a long time so it's cool to be closer to that goal.