There are several apps that can export data in real time to an external database. You can use my Archive Insights app to automatically export data to csv and/or JSON. [APP][Pro] Archive Insights - export all your Insights data to a NAS, FTP or web folder
With PBTH you will get the summarised data and Insights per hour/day/month in Homey. You can automatically (e.g. daily) export these Insights with above tool.
Without PBTH you will only have the compressed (!) actual power or actual cumulative energy in Homey Insights available for export. I say compressed, because the older the data is, the less granular it gets.
This is getting off topic though, so please keep this thread about PBTH.
