New batch for S15 is listed on BM site. 27th at 1600w, 16th at 850 LPM. Thought it might be a new version but specs are essentially the same unless I missed something,
https://shop.bitmain.com/product/detail?pid=00020181210184613385gc3S2eKL0674
https://shop.bitmain.com/product/detail?pid=00020181210184613385gc3S2eKL0674
I bought one S15 from this batch to test it out,
not sure if I will have a place for it in long term.
Maybe my friend who lives in a student apartment can help me out,
if it is not too loud in the low power mode.
But what I've seen in videos so far,
it seems that the psu can be quite loud.