I'm running a Multiplus-II GX in an off-grid system with AC coupled PV Enphase microinverters
I'm getting really bad flickering in the lights and humming from electronic devices under certain conditions
The issue happens when the PV inverters are under partial load (either cloudy conditions or output ramped down when bulk finished)
I've measured the current waveform coming out of the PV inverters and under these conditions the sine-wave gets very distorted with 2nd and 3rd harmonics
Has anyone else had experience with this? My thoughts are either trying to filter the PV inverter output or even just the light circuit as the flickering is the main issue for me