Intel NUC powered by 13.8v power supply with UPS

[charisketi]

I would like those who have more knowledge to correct me to possible mistakes in what I want to follow.

I plan to buy an intel nuc, specifically the:
Intel NUC 11 Pro Kit NUC11TNHi50Z (Core i5-1135G7).

Intel® NUC 11 Pro Kit NUC11TNHi50Z Product Specifications

Intel® NUC 11 Pro Kit NUC11TNHi50Z quick reference guide including specifications, features, pricing, compatibility, design documentation, ordering codes, spec codes and more.

ark.intel.com

This mini pc gets 12-20 VDC power supply. The power supply I want to use is UPS enabled and it is this:

Mean Well AD-155A

Mean Well AD-155A AC-DC Enclosed power supply with UPS function; Output 13.8Vdc at 11.5A +13.3Vdc at 0.5A

www.meanwell-web.com

which at 13.8v gives 10.5a.

I would like to ask first if the logic I want to follow is correct. The 13.8v 10.5a seems enough for the power supply of the nuc that has max 65watt requirements. Another question, if there is a power outage and the power supply ups is activated, the battery (12v 7ah) will be able to meet the energy requirements of the mini pc? For 12v i will need 5.4a from the battery (for 65watt maximum requirement).

Thank you

 

[Korishan]

Took some digging, but that AD-155A does not come with a battery. You must supply that yourself.

So as far as battery requirements for your NUC, you'd need to spec it out. So the NUC will draw a max of 65W, this is at 13.8V. So with a little math this equates to 4.7Ah. The most common capacity is around 2200mAh(2.2Ah), so if you have 4s2p, this would give you 13V with 4.4Ah capacity. This obviously would not last long under full load. But it would be long enough to shut the system down safely.
If you wanted the system to run for an hour or longer, you would need to bump up the parallel group. I wouldn't go with anything less than 4p even for immediate shutdown, just to be safe.
8p would be better by far