Dynamic Tariffs
If your own PV power is not sufficient, the charging power requirement must be covered from time to time by grid power. If you have an electricity tariff with flexible electricity prices such as Tibber or Awattar, you can optimize your grid charging with evcc.
Configure data source
Section titled “Configure data source”Your electricity price is configured under Configuration → Tariffs & Forecasts → Add tariff → Add grid import tariff. The currency can be changed under Configuration → General → Currency.
Fixed electricity tariff
Section titled “Fixed electricity tariff”For a fixed electricity tariff, choose Fixed Price in the Provider field and enter your price per kWh. This information is used to calculate the actual charging costs.
Time-dependent electricity tariff
Section titled “Time-dependent electricity tariff”If different prices apply at certain times, choose Time-based Tariff in the Provider field. Enter your regular price in the Default price field. With Add zone you can define as many periods as you like in which a different price applies, e.g. on weekdays from 2 to 6 am or at the weekend. Each zone has its own price and can be limited to specific days and hours.
Dynamic electricity tariff via API
Section titled “Dynamic electricity tariff via API”If you have an electricity tariff that follows electricity exchange prices, for example, you can also obtain the prices via an API. Choose your provider in the Provider field, e.g. Tibber, and enter the provider-specific access data such as the API token.
You can find a list of all supported tariffs under tariffs. If your provider has an interface but is not yet supported by evcc, please submit a Feature Request.
Time-based grid fees
Section titled “Time-based grid fees”If your grid operator bills time-dependent grid fees (e.g. time-variable network charges according to § 14a EnWG in Germany), you can add them on top of any tariff using chargesZones.
See time-based grid fees for details.
Smart feed-in
Section titled “Smart feed-in”During certain periods of the day and in specific regions, there might be an abundance of solar power. At the same time, there may be almost no load on the grid. During these periods your energy provider might apply a cost for injecting your PV-power to the grid as supply is high but demand is low and the grid is overloaded. evcc supports smart feed-in and allows you to define a set point at which it will throttle PV inverters to prevent feed-in.
Cheap grid charging
Section titled “Cheap grid charging”If you have configured a time-dependent or dynamic electricity tariff, the “Cheap grid charging” section will appear in the settings dialog at the charging point.
Here you can see the energy prices for the coming hours and set a price limit.
This limit applies in solar mode of the current charging point. If you click on “apply everywhere”, the limit is applied to all charging points. In addition to Solar Surplus Charging, fast charging is now activated in the hours with low electricity prices (green bars).
Charging plan
Section titled “Charging plan”By using charging plans you can regulate your energy costs even more precisely. All you have to do is enter your energy quantity (kWh) or your target charge level (%) and the desired departure time. If a time-dependent or dynamic electricity tariff is configured, the planning algorithm automatically selects the cheapest hours for charging.
