on the battery costs, i am assuming that they haven't incorporated gigafactory batteries into the automotive side yet.
i am going off an old electrek article which suggests the prior $190/kwh will come down to $125/kwh due to the gigafactory:
Tesla is now claiming 35% battery cost reduction at ‘Gigafactory 1’ – hinting at breakthrough cost below $125/kWh
the drop is assumed to be 35% quarter to quarter as gigafactory batteries work their way into car batteries.
i was at my local tesla center yesterday and the day before. i've struggled to get appointments for test drives and "customer education". yesterday the whole place was humming and the sales guy was complaining he was understaffed. they pulled some kid out of the back to take us on our test drive. the guy who was with me was in the market for a luxury suv. afterwards he said he expected tesla was better than some of the others, but he didn't expect it to be "so much better." there are few x's in inventory and i feel like there's probably a lot more unsatisfied demand out there. they've only shipped a total of 37k x's globally after all.
with cars scheduled to ship in june already, i don't think that demand has dropped enough to matter near term.
on inventory see pg. 78:
tsla-10k_20161231.htm
As of December 31, 2016 and 2015, our inventory consisted of the following (in thousands):
2016 Finished goods 1,016,731
Finished goods inventory includes vehicles in transit to fulfill customer orders, new vehicles available for immediate sale at our retail and service center locations, pre-owned Tesla vehicles, and energy storage products.
5k vehicles were in transit last quarter, figure that's 500m in inventory likely headed to delivery.
that leaves 517m total inventory to account for - including energy storage, used cars, and the loaner fleet.
a 10% across the board writedown would be a $52m one-time charge in a given quarter. they've been averaging a $15m charge for inventory writedown each quarter in 2016.
so there could be an unusual charge of about $37-40m in that case, which is more meaningful but not the end of the world. they could cover that with more ap revenues being realized. definitely an incremental negative to q2 though. i'll put more thought into it after i hear the q1 call. thanks for pointing this out.