Bumping this thread, as my observed results seem to deviate a bit from those shared above.
I’ve recently installed the Sense monitor on my mains - and also have two HAN gateways paired to my electric meter providing realtime usage information.
Both the Rainforest Eagle and Universal Devices ISY994z agree with the realtime display on the meter face (not surprising, since this is their data source).
However, the Sense consistently reads 50-60W less - regardless of relative load. Meaning - whether I’m way down at baseline usage of < 500W, or peaking while charging the EV and running the microwave and electric clothes dryer - I still seem to see this ~50W variance - so it’s not ‘proportionate’ to load.
This would lead me to believe there’s some circuit or draw not accounted for - but I’m 100% confident I’m clamped to the mains - the only connection into the house from the meter. There is a sub-panel downstream of the main panel where the Sense is installed - but, as expected, all the load generated there (from a remodeled kitchen) are all reflected on the Sense.
At higher loads, this ‘error’ definitely comes down to a reasonable deviation - but at baseline (~500W) - it represents at least 10% under-reporting of usage.
Is there any way I can further isolate or diagnose the discrepency?
Thanks in advance,