Hi,
My name is George Q. I am an experienced electronic hardware systems engineer but new to solar and know nothing about solar inverters inverters and their setups.
I just purchased a re-furbished EG4-3000EHV-48 , I think it's a V1. A paper in the box said it was refurbished and FW updated last Aug 2025. I was going to purchase new but balked after the recent price increase.
I configured the unit with an Eco-Worthy 51.2V server rack battery and without solar input; plan to use it in a Time Of Use ( TOU) configuration where batteries charge at night when electricity is cheaper in my area.
After selecting "LI 2" under setting 5. my unit communicates with and charges an Eco-Worthy 48V server battery (really a 51.2V ) to 100% from AC but will not invert from the battery. It will invert only if I select "user" in settings 5. but again , will only charge if set to "LI 2" under setting 5. I did not see a choice for "LI 5".
A USB to RS485 cable came with the unit and I plugged it to the RS485 port of the Eco-Worthy battery. With the section 5 setting in "LI 2" If I disconnect it, the LCD display throws an error 19 and it goes away after I plug it back in. No error in "user mode" but I think it' s not looking then.
Any help will be greatly appreciated.
Thank you,
George Q.
