Use retroactive data?

[kdw2060]

Is it somehow possible to use the stored energy history data in Home Assistant to get a simulation based on historical data?

[dewi-ny-je]

No, integrations don't really have access to historical data.
Already requested in
#144 (comment)

If you are interested in it, your best luck is to use data stored in InfluxDB (if you have it) and process it externally to Home Assistant, for example with a Python script, but this simulator really cannot do it.