European-style plug-in solar could quickly cut soaring utility bills in Massachusetts
(www.bostonglobe.com)
does the system wait for electricity to flow in before it flows out?
Basically, yes!
If you unplug the micro inverter, it’ll cut the power within milliseconds of it detecting no electric signal. AC alternates around 50hz in the UK which the inverter detects and starts generating. Once it losses the hz signal it stops.