Here are articles that help with some monitor installation questions:
What should I do if I receive an error code during Monitor installation?
What if I hear beeps or no sound after Monitor installation?
What if Sense doesn't start after I install solar?
Do I need an extension cable for my 400A setup?
What if my Sense monitor is not communicating with the server?
What if I don't have enough space in my electrical panel?
What if I don't have enough space for a 240V breaker?
What if my Sense Monitor isn't found during installation?
How can I troubleshoot open CT sensors?