Hi, I just bought SHP-15. It has the new firmware (version 69) and identifies itself as _TZ3000_u5u4cakc. I have deCONZ 2.17.1.
On the first try, the plug was paired instantly via Phoscon, but the power sensors never appeard in Home assistant. I tried re-adding the sensor few times, but with no luck. Then I tried the DDF “workarounds” above through Deconz (Panel > Control, then switching DDF settings) and was removing and re-adding the plug. The Silver/Broze settings made no difference. Then I switched to the Hybird DDF, rebooted the Raspberry with Raspbee II and re-added the sensor. Not sure whether it was the Hybird settings or the device reboot, but finally I get the power sensor exposed to Homeassistant. After that, I returned DDF mode to the “Basic Gold” and rebooted again, to make sure it still works, which it did.
I also have the quite similar Blitzwolf SHP-13 plug, so I tried connecting them them on the same plug in series, to compare how they measure the power consumption. Have a look at the graph - the SHP-15 (purple) measurement is almost real-time with 5-sec updates, while the SHP-13 (blue) updates only every 5 minutes.
So if you don’t mind some mumbo-jumbo with the pairing and DDF, I’d recommend the SHP-15 for precise and real-time measurements.