MrClass wroteI think the same thing happens with me when electricity is cut. Internet is fast when there is electricity, when it's out, I suddenly begin having a slow connection. I did not check the SN margin on my router, but the speed difference is noticeable. I will check it today at 3.
Hey, its actually the way around with me. When electricity is OFF, SN Margin is up, connection is fast and stable. When electricity is ON, SN Margin is way low and connection becomes slower and i can experience some interruptions.