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kasa-collector
Kasa Collector provides a way of collecting real-time energy data from Kasa Smart Plugs. These Grafana dashboards offer visualizations for their Current, Voltage, Power, and Total Watt Hours.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you only need energy consumption tracking, Grafana might be a better solution. They have plenty of pre-configured dashboards and scripts like this, specifically tailored to energy consumption from Kasa plugs.
If you do go down the HA route, I would still recommend Grafana, just as an add-on within HA instead of a standalone instance.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.