Hi guys. Just found out about this project today. Great idea.
I've been thinking about this for a few years myself and looking for some shortcuts.
One idea I stole from the [Digital Electricity](https://voltserver.com/idea/) folks is that 99% of all modern power supplies are made for international use and are perfectly happy when supplied with 100 - 240 VDC - no AC required. Ten - 12V batteries in series hit a nice sweet spot where they can start out fully charged at 140 VDC and discharge to as low as 100 VDC very smoothly and with very little if any regulation or filtering required.
Of course there will be application exceptions and you don't want someone accidentally plugging in a 120V analog AC supply or induction fan motor for cooling. My thought was to pick a special(to the USA) but readily available international plug type so that no one would accidentally plug in something not compatible. They would have stop, think and replace standard cable to use this special DC UPS.
It may seem a little half baked at first, but the more I thought about it, and the more I independently verified their assertions the more exited I became. Now they do have some patents covering how they can send high power over Cat5/6 safely but I don't think that is required for UPS purposes where the cable is short and beefy.
Anyway, with the direction you are headed now, it might be a simple thing to allow a branch design that simply connects to your high voltage DC rail to connect compatible equipment. There is also a lot of activity in large server deployments to skip the AC to DC loses and distribute throughout the facility as DC.
It is probably a poor idea to introduce myself with such a seemingly nutty idea, but that is the best I have to offer today. And BTW the Digital Electricity folks are not nuts, having secured UL certification and made many large scale deployments. Here is a link to Belden Cable's take. [Things you need to know.](https://www.belden.com/blog/smart-building/digital-electricity-5-things-you-need-to-know)
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