I’m confused, you are not making things very clear which limits my ability to try and help you.
Your first post said “my panel is dead”, “won’t light up”. Now you say “yes it has power”. What has power? The panel has power? The battery has power? Neighbors house has power?
What does having power mean - Does it have sufficient power (i.e. a full 12+V, or something significantly lower) (assuming you’re talking about the 12V system and not the 120V system - which again, we don’t have enough information to know).
The more we know, the more helpful we can try to be. Right now all we can do is throw chit at the wall to see what sticks.
I hope you find and fix the problem today, otherwise, a lot more info is going to be needed for effective troubleshooting.