I usually refer to Photon Labs outdoor test results, but Stion doesn't show up there. Too new?
Stion is a start up from 2011 with recovery money, making thin film panels (prefer multi-crystaline myself) that at last report seems to be struggling to avoid bankruptcy. Doesn't bode well if there's a warranty issue later.
120 W panels? Twice the roof space of crystaline.
But, only $0.60/Watt.
'12 SL last reading @ 2 yr, 22k, 260 GIDs, 62.35 Ahr
'15 SV w/QC, Mfd 5/14, Leased 8/14, 292 GIDs, 64.38 Ahr when new
@ 36 months, 34k, 270 GID, 57.49 Ahr
'17 Bolt LT 6.72 kW Array