@glyn.hudson what you are referring to is the integration which is the thing that easily gets data out of Emoncms into HA.
This add-on is a complete instance of Emoncms, being run inside a container within the Home Assistant Supervisor. It is a one click install. No OS to manage and other dependencies are satisfied by other add-ons (such as MQTT, an SQL database etc).
I’ve not looked into it in detail so not sure if Redis is part of the build.
For anyone that wants a simple way to get started and use it in conjunction with other things (such as Node-Red) it is actually a really good solution.
HA has a great snapshot function so regular backups are easily made.
My reservation is that @inverse is simply doing this as he wanted to experiment with creating an add-on so I’d worry about long term support unless you guys took it on.
If using on a Pi and wanting to use the RFM card, there would need to be a little development to get the serial data in (not impossible) or you could just use an alternative RFM receiver and use the RTL_443 add-on (probably - not tested yet).
However, HA is getting to the stage whereby a Pi is not really the ideal hardware to be running it on especially if using an SD Card.