Yes, TESLA's battery is junk.  That is the reason I never invested in TESLA.  I decided to invest in Electrovaya because they had and still have the best battery currently made.  Now I admit that I do not know the specifics of all the batteries in the World that are made today.  That being said I have been trying to spec out a battery for a couple of new off grid buildings I am building that will be connected into a micro grid.  I wish Electrovaya offered a battery to the solar industry, but they don't.  That leaves me searching so I have looked at 10 to 15 different batteries.  None measure up to the energy density, safety or cycle life of the Electrovaya battery.