Syncthing — Syncthing is a continuous file synchronization program. It synchronizes files between two or more computers in real time, safely protected from prying eyes. Your data is your data alone and you deserve to choose where it is stored, whether it is shared with some third party, and how it's transmitted over the internet.
CloudFree Smart Plug – Runs Tasmota — This product runs Tasmota, which requires some technical skill to set up. The Tasmota project will not provide technical support.
Raspberry Pi Power Monitor — This project is an extremely affordable, yet highly capable “build-your-own” energy monitoring solution. With up to six total inputs, you can monitor many different consumption and production sources.