Feature Request: Limit charging from grid based on realtime grid usage

[kimme1024]

During the winter months it's sadly sometimes needed to charge your car from the grid.
As I'm having peak tariff I have to do this at night.
However, in Belgium, we're also fined on our peak quarterly usage. This morning, the car was charging, I was still asleep and my wife used the oven, therefore our peak usage for this month raised a lot. (The highest 15min of the month will count)

To avoid this it might be useful to implement the opposite of the script for the case when it's charging from the grid.

Example:

When charging from grid, you can set a grid limit (ex 4000W). So the car can charge at it's maximum current, but when another device starts using electricity which causes the grid usage to exceed the limit, it lowers the car's current for the time that this occurs.

I think this would be a very useful addition to this project!

[ddeconin-gh]

+1 for this request :-)