Most people usually see very close correlation between their electric bills and Sense, but there could be a few factors that get in the way:
- Do you have a smart meter or is your meter read by a human ? If human, is that reading exactly on schedule ? If a smart meter, how often does the meter do an actual read vs. a calculated read ? And if these questions are a bit beyond what you know, I can try and help you step through them.
- Are you sure the Sense CTs (current sensors) are on your house mains ? A few folks have installed their Senses on a parallel subpanel in the past an only seen part of their home’s load ?
- Are you sure the CTs are are closed all the way ? You seemed to have checked, but it can be tricky. One recent user thought they had the CTs closed all the way, but closing the breaker panel was causing one or both to open, so they finally taped them closed and saw a big improvement.
Here’s are some thoughts on other ways to check accuracy, especially if you have a smart meter.