Yes, Solar City and Maxwell were both public. Maybe others I'm forgetting.I have followed and bought ENPH when they were trading in the 5$ range. I made a mistake of selling half when they got to 35$. I compounded my mistake by selling Feb 21 calls as I thought the stock had run up quite a bit. I was forced(well not forced but I did not want my sold calls to get exercised) to buy to close those calls.
ENPH was up 45% after earnings. I agree that there seems to be room for both ENPH and SEDG to grow. I bought some SEDG just before their earnings. Market caps are too big to be considered as likely acquisition targets for TSLA. Has TSLA acquired any public company in the past?