New "Next Tariff Switch" sensor. It shows when the system switches between low and high tariff rates. It only updates when an actual switch occurs, so it doesn't clutter the history.
"Refresh Data from API" button. You can manually fetch data whenever you like.
Configurable price unit. The default is CZK/kWh.
The card containing the graph is translated. The language is inherited from Home Assistant; the default is English.