Native EDF Tempo tariff integration for EV charging and home battery management

I would like to request native support for the French EDF Tempo electricity tariff in EVCC.

EDF Tempo is a dynamic tariff based on three day types:

• Blue days
• White days
• Red days

Each day type has two time periods:

• Peak hours (06:00–22:00)
• Off-peak hours (22:00–06:00)

Electricity prices can therefore vary significantly depending on both the day colour and the time of day. In particular, peak hours on red days are significantly more expensive than blue or white periods.

A previous feature request regarding EDF Tempo (#11040) had already been submitted, but it was closed as "not planned". However, I believe that native support would now be particularly useful, as EVCC has evolved significantly in terms of tariff management and smart charging.

My use case is not limited to EV charging.

I would like EVCC to use Tempo price forecasts to intelligently manage:

1. EV charging

• Prioritise charging during low-cost periods.
• Avoid charging during peak hours on red days.
• Take the known colour of the following day into account when planning overnight charging.
• Optimise scheduled charging based on the actual Tempo prices rather than simply relying on fixed off-peak hours.

1. Home battery

• Avoid discharging the home battery during expensive periods, when grid consumption should be minimised.
• Potentially charge the home battery from the grid during sufficiently low-cost periods.
• Preserve battery energy before an expensive red period.
• Use the following day's forecast to determine an appropriate target SOC.

1. Combined EV and home battery optimisation

• Coordinate EV charging and home battery operation.
• Avoid situations where the home battery is discharged to charge the EV when charging from the grid would be preferable.
• Take into account the energy price, battery SOC, EV SOC or target energy, and the upcoming Tempo period when determining the optimal strategy.

Ideally, EVCC would automatically retrieve the current day's and following day's Tempo colour via an official or reliable API, and expose the resulting price forecast directly to the scheduler.

This would allow EVCC to be used not only as an EV charging controller, but also as an energy cost optimisation system for homes equipped with photovoltaic systems, AC-coupled batteries and electric vehicles.

I would be happy to provide a concrete example of a Tempo installation and to test such an implementation.