Greetings @Gretagarbo
Welcome to the Roku Community and thanks for posting your inquiry.
Please be aware that if you lose power or internet with your home system, Noonlight will not be notified due the lack of internet connectivity. In addition, your home system will sound the alarm on the hub, if an alarm is triggered while on battery backup, should you lose power and internet connectivity.
Thanks,
Danny
Danny R.
Roku Community Moderator