I do not think this is unique to your chosen device and the principle is pretty much the same as a pulse count except an “actual counter” probably won’t ever reset or roll over, negating the need for the “WhAccumulator” a simple “log to feed” would work just fine.
See How to get correct kWh/W values from Pulse for a recent discussion on getting kWhd and power readings from a pulse count, as far as emoncms is concerned it is an ever increasing number, it doesn’t know or care if it’s a pulse counter or an actual meter reading.