This may be common knowledge but if I was to have the EG4-3k cart setup plugged into the house wall outlet while the power is out and it running a refrigerator plugged into the power strip, the system is technically grounded thru the house outlet for AC charging cord and if the power comes back on during the night the system will start charging the battery and continue to run the fridge. Right?
This will be the likely use for this system for me. Solar will be a stand alone function not running anything off of it as during the day I have a generator to handle day time needs during power outages.
You mean plugged into the AC IN on your eg4, so power passes through?
Or are you trying to send your house electric circuits live during a powercut (power outage) ?