Some time ago we were notified by our Utility that our neighborhood would be turned off overnight for some maintenance. I sleep with a c-PAP machine to breath at night so I used a small inverter from Harbor Freight plugged into the car, then extension cord from car and garage down hall to bedroom. I slept well, thank you. With the Leaf in Ready mode, and no adjustments for display lights, I used it overnight. The next morning all was well, the inverter worked great, and displayed GOM went down very little. I do not remember, but it was almost nothing, maybe one or two miles range loss. Sorry to not have a better or more accurate reporting, but did not write it down, I just remember it was almost nothing.
Hope this helps.
2013 SL Metalic Slate
MFG 08/13 Dlv 09/06/13 @ 10 mi
12/27/13 LeafDD at 100% measured at noon (4,817 Miles):
259 gids, 96.93% SOC, 92.20 g%, 58.01 Ah, 19.7*c (67.4*f)
C 59.8475 V 395.5
# 77 100 mile club
# 10 200 km club