I have a very similar issue. I have the Generac Ecogen 15kW generator. The advertising for this generator specifically states it is for off-grid use.
I purchased the generator brand new in the crate from Generac. I installed it last week and upon hooking up the battery the LCD is blank and the warning lights next to auto, manual and off are lit up.
I am not using N1 and N2 since the generator is being ran as a back up to my solar panels and lithium batteries. I have wire ran from the inverter to the E1, E2, neutral and ground. I also have the two wire start connected to my charge controller.
These are the only wires I have hooked up at the moment. I plan on running 120v to the T1 to power the battery charger. I have been told the generator should start up on battery power alone and that the T1 is not needed to set up the controller.
I cannot find anywhere in the installation manual, install manual or on line that says what the issue might be when the three lights next to auto, manual and off are on.
I have not been able to enter the activation code since the LCD is blank. Nothing has turned on except the lights.
Any suggestions as to what may be the issue, or is it a bad controller out of the crate? One last thing, I have a jumper connecting both connections on the T23. I am not using a transfer switch, so should I leave the jumper as it came, or should I remove it?
Any help and/or suggestions would be greatly appreciated.