Energy generation&storage revenue was $286,780,000. This included : So Tesla energy storage revenue was $15,680,000. On the cost side, generation&storage carried costs of $203,762,000. This included : So Tesla energy storage cost was $29,762,000. Gross margin on Tesla Energy storage product : -$14,082,000. Or -90%. Interestingly, Elon told potential bond investors on a conference call that they don't expect Gigafactory battery production costs to drop below generic Panasonic import before the last quarter of this year. I must assume the same holds (or maybe even worse given the lower volumes) for energy storage cells which explains the extreme negative margin on their powerpacks so far. Up untill today it seems Tesla is buying energy storage market share on their shareholders dime. Fortunately, the market is rather small.