I saw two unrelated posts from potential buyers who want batteries with their solar cells and are confused, because of an issue as described here - Tesla's New Battery Doesn't Work That Well With Solar - Bloomberg Business Let me explain - There were two residential batteries offered by Tesla, a 10 kWh and 7 kWh. They have different li-ion chemistries. The 10 kWh does not have the cycle life for daily use and is meant for backup only. The 7 kWh is meant for daily use. The problem started from the fact that SolarCity decided to sell only the 10 kWh battery and not the 7 kWh (expect for in Hawaii), not because of technical issues but because they do not see it as financially beneficial enough to customers. This only confuses customers, who do not look for financial viability for the most part and are doing a lifestyle choice to be off grid. The impression that is taken is that there are technical problems with Tesla batteries working with solar. Tesla is loosing both sales and brand name as a result. As with anything Tesla, this just gets magnified by the press. If any of you is in contact with Tesla representatives - please pass on this issue. Unless you see a flaw in the description in which case please explain.