A related tool for Germany: https://peakpick.de/webapp/index.php

The idea behind this:

• Electricity generation from wind and solar is not constant. PeakPick visualizes and forecasts the share of renewables.
• By choosing when to run your home appliances, you can use more of the renewable capacity, and less of fossil fuel backups

This made me aware that the best time to use electricity is around noon (+/- a few hours). By shifting your electricity consumption to this time, you can cause less emissions, regardless of your contract.

Open question: A complete picture would require plotting the consumption along the production. For example, while renewables might peak at 1 PM, maybe all that capacity is already eaten up by consumption at that time. If hypothetically consumption was below capacity at 3 PM, it might be better to consume then, even if capacity is lower then.