We tested the peak power consumption of a NAS at the wall during a run of CrystalDiskMark 5.0.2 as this version of the benchmark runs the read and write benchmark suites separately, so it's easier to monitor what power the device is using during each function.
Powered by a CPU with a TDP of 65W, the TVS-1282 is never going to be exactly frugal with its power requirements when actively reading or writing, even with hard drives as power efficient as WD's Red drive is. Adding a 10GbE card to the mix doesn't exactly help matters either.