I think I've overseen a very important note.
Logical levels are specified as follows:
SPACE “0” usually > 4V
MARK “1” as < 1 V
Meaning, the levels are inverted. Right?
I'll try to add an inverter since I've not got any useful data out of my two day debugging session, other than that the hdrv_zwave decides if the meter report is unsolicited or not.
Also there seems to be some kind of table with meter information, and if you leave the CRC out of the telegram, it looks like the table gets resetted or something