When planning a new UPS system, what is the proper way to account for redundant PSUs when planning UPS capacity? For example, if I have a server that has (2) 500W redundant PSUs should the UPS be scaled to handle 1000W or just 500W. I realize this isn't best practice for full redundancy and that the example is probably over simplified, but I am just trying to get an understanding of how I should account for that in my UPS design. Thank you.
You should size your UPS based on the total load. On most servers, the hardware should distribute the load evenly between the 2 PSU's although some newer lines allow you to specifically configure these loadings.
I hope this helps,
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