AC300 goes blank after I plugged in solar

I plugged in solar to one of my ac300’s, it went blank and never came back. I used the same solar panel wires on my second ac300, and it is working perfectly for 3 months. The first one still has a blank screen, even plugged into AC. Any thoughts?

Hi @slark, Regarding this issue, could you please provide the specific specifications of the solar panel, especially the open-circuit voltage?

Additionally, how many batteries are connected to your AC300, what is the battery model, and are the batteries charged?
If you disconnect them, charge the batteries separately, and then reconnect them to the AC300, would that help?
We will then conduct further troubleshooting.

WORKING! Charged two batteries and put them on, fired right up! Added the solar and off she goes! Thank you for the help!