I am using the Energy dashboard, and it works well. The usage amount shows correctly, and matches my utility within a few percent. When I install an update (e.g. HA core 13.2 yesterday), the usage total is still correct, but the cost is wrong.
Here’s an example:
Notice that the Energy dashboard implies a cost around $0.091/kWh (=$1.44 / 15.72kWh) for the ULO tariff. But in fact in the configuration, you can see this is configured as $0.04691/kWh.
Again, the cost is fine IF I don’t install any updates. The dollar amounts are only off when I install an update and restart HA.
I can’t find this as a known bug, does anyone have an insight?