We have just released the beta version of the plugin for HundredGraphs and looking for testers.
Previously you have to install the lua file yourself and that created a lot of confusion.
The plugin finds energy reporting devices by itself. You would only need to update the API KEY in Variables and change the reporting interval if desired.
The version 1.4 is published on Alt App store in ALTUI. Also a request to publish was submitted at the official store.
You will find HundredGraphs at https://www.hundredgraphs.com/?link=beta. It logs all your energy meter devices and can do even more.
Known limitations: You devices can be ASCII only with -_, any spec symbols would result in 500 error. 200 means it was processed OK