This is just the visualization part, it’s a part of emoncms, currently emoncms.org is running the more established version of “mySolar” that doesn’t have the diverted elements, just use and solar, hopefully in time the two versions will merge, for now you will need your own installation of emoncms to use it.
As for the data behind it, that can come from a multitude of places and be processed in emoncms for presentation as you choose. pretty much any data can be used, but the obvious choice being CT’s, connected to an emonPi or emonTx.
Some users have a 3rd party diverter like iBoost or immersun etc, some have a self-build diverter driven by a emonTx (or an emonPi might do it too, I refer to your other thread there) or they might have a kit by Robin Emley (@calypso_rae) from his site mk2pvrouter.co.uk, some users have written scripts/code that monitor export and automatically switch on appliances etc using that info, even running out to the garage and turning on the clothes dryer when the sun comes out is a form of diverting.
Once you have an separate measure of the diverted load(s) this app can then display that data in a standard way or you can create your own dashboards in emoncms, think of this as a ready to go pre-made “just add data” dashboard.
The conversation about hardware and your options for getting the data to emoncms should remain in your other thread, this thread’s discussion is specific to this app as a form of presentation.
[That other thread is Hardware for Energy Monitor and PV Diverter advice please - RW]