There are several other postings from the community about sporadic incorrect power spikes registered on Kasa smart plugs. I’m not sure anybody has gotten to the real root cause, but in most cases the Kasa device was reading the same instantaneous power when the event happened. But you can’t compare Sense historic data to Kasa historic data. Sense history is entirely based on instantaneous samples. History on the Kasa (daily, weekly, monthly) uses a separate, different “call” to the smart plug.
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