FWIW, if you're willing to replace the receptacles, there are several good options.
I've recently started installing Legrand Zigbee 3 receptacles, both the 15A and 20A versions, and have a number of the GE/Jasco Zigbee receptacles as well. I like both, and they are both rock solid. I don't really use power monitoring, but the Jasco has a model that does it, and a model that doesn't. The Legrands both do, but I think there is a scaling problem with power reporting.
Note, neither are cheap.
S.
