Battery day stated:-
- High Nickel - Semi and Cybertruck (also probably Roadster)
- Nickel / Manganese - S, X, 3, Y
- Iron - energy storage and entry level vehicles
For large scale energy storage, I can see Tesla mainly using external suppliers. for example. CATL.
The issues with making everything high nickel are:-
- Sourcing the required volumes of Nickel.
- The additional cost of using more Nickel
IMO most of the Battery Day cost savings they talk about where for the high nickel chemistry.
But if we take Battery Day literally, Model Ys produced at Austin will have Nickel/Manganese cells.
Clearly they didn't tell us everything at Battery Day, I don't think making Cathodes with different chemistries would change much on the 4680 production line...
All cells might be High Nickel if they can get enough nickel at the right price,
IMO if we are talking a "structural battery pack" that probably requires cylindrical cells to make a honeycomb structure, obviously for energy storage a structural pack isn't required. Again there could be stuff here we haven't been told,, so there could be multiple possible solutions..