Building a Power Monitoring Device

[parascand]

I am new to the esp32's and I am trying to build a monitoring device. I have a koi pond and sometimes have power issues where I live. I want to be able to monitor the power to my pumps and filtration. I want to be able to plug into an outlet and for that plug to go into a device like https://tinyurl.com/3esdzuvz. I want to run it off of a battery that will be charge constantly by the outlet but if power is lost it will still work. I am looking for suggestions on this. It will have access to wifi but if I lose power to the house I want it to be able to text me through cellular. I am looking for ideas for modules or esp32's with built in cellular. If anyone can help me with the code that would also be much appreciated. Anything else that I am missing. Thanks