Which values are you comparing ?
- Usage - which time period are you using - Bill, Month ??
- Compare - the value there is wattage so the only Trend Usage value that it might be useful to compare against is the your hourly data in Wh.
The math lines up for me if the 1900kWh is for a 30 day billing period.
1900kWh / (24 hrs/day x 30/days month) = 2639Wh or 2639W
You did make me compare my Sense hourly data against my PG&E/utility data again and I did find a small anomaly on Jan 1, 2020 (orange dots). It looks like the Sense data, just for that day, was coming in at about 1/2 of the correct value. But all the days before and after matched up nearly perfectly… Mysterious…