2 kWhr per mile means the 300 mile is a 600 kWhr battery and the 500 mile is 1000 kWhr.

400 kWhr's for $30k means they are expecting $75 per kWhr battery costs. Last year they said it was under $190 per kWhr.

I am very skeptical they can meet that target, $75 would be pretty revolutionary in such a short time.

But reading the article, it becomes more clear that it's about the Tesla Semi, which is an electric truck. Confusing headline.