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Is there a way to determine battery pack capacity on the Tesla Powerwall 2? I can access all the relevant details on the api.... but there is nothing about the actual battery pack capacity as it stands compared to when it was new. I know that Tesla warrants 70% capacity at 10 years with daily cycling.
I would like to know what the battery pack is at now as it is over 3 years old. Batteries do degrade over time. So, if I had a theoretical battery capacity of 13.5kWh, what would it be now on a full charge at 100%.
Percentages are meaningless on the app. Say, it says 75% charged... what is 75%? It would be better to display the approximate kWh capacity available. That way, one could estimate how long the battery will run given a load.
The app should have something like the fuel range on a car, you know, how many km/miles left based on the fuel tank level before one runs out of fuel. Surely it can't be hard for the app to work out that it has X amount of kWH and a load of Y amount of kW. Time left would be X over Y.