The power has been off for several days and now that it is back on it isn't showing any electric usage. How can I tell if it is working or not? If it isn't working how do I get it back online.

Hi:

Has this problme resovled now?

Please refer to 

https://www.iammeter.com/newsshow/faq-abnormal#reconnect-the-router-after-recovery-of-the-power-supply-outage

It usually need 5-10 mins to resume the WiFi connection with the router when the device and router recover from a power supply outage at the same time.