Elon Musk曾稱贊電池交換是零停機時間電動汽車“充電”的最終解決方案，著名的是在2013年年中展示了一款S型車的現場交換——但隨著特斯拉專註於構建高速增壓器網路，這項技術有點落伍了，終於在去年底在加州的一個車站嗚咽著發射了。

現在看來，掉期基本上是一到即死。在特斯拉今天的股東大會上回答一位投資者的提問時，馬斯克對當時的情況非常坦誠：

We have the LA-to-San Francisco pack swap capability in place, and I believe all Model S owners in the California area have been invited at this point to try it out. And what we're seeing is a very low take rate for the pack swap station. So we did an initial round of invitati***, where we did basically like 200 invitati***, and I think there were a total of four or five people that wanted to do that, and they all did it just once. So, okay, it's clearly not very popular. And then we said, okay, let's expand that invitation to all customers, but I would expect that all customers roughly behave like that initial sample group.

It's just, people don't care about pack swap. The Superchargers are fast enough that if you're driving from LA to San Francisco, and you start a trip at 9AM, by the time you get to, say, noon, you want to stop, and you want to stretch your legs, hit the restroom, grab a bite to eat, grab a coffee, and be on your way, and by that time, the car is charged and ready to go, and it's free. So, it's like, why would you do the pack swap? It doesn't make much sense.

We built the pack swap into the car because we weren't sure if people would want to choose the pack swap or not. We thought people would prefer Supercharging, but we weren't sure, so that's why we built the pack swap capability in. And based on what we're seeing here, it's unlikely to be something that's worth expanding in the future, unless something changes.

For the Superchargers, as we said in the initial press release, the Superchargers are free. It's basically free long distance for life, forever. So free long distance forever is what the Superchargers are providing. Now, there are a few people who are quite aggressively using it for local Supercharging, and we will sort of send them just a reminder note that it's cool to do this occasionally, but it's meant to be a long-distance thing. But it is free long distance forever, and it's basically built into the cost of the car. And based on what we're seeing in terms of the economics, it looks quite supportable.

當然，“樣本組”中攝取麝香的不良現象是人為的低。本站僅預約換乘；沒有人預約給汽車加油罐加油，所以難怪沒有人定期換電池。實際上，如果互換基礎設施建設得足夠充分，增壓器和電池交換都會有自己的位置——在小區角落的服務站停車，幾秒鐘內獲得全充電，可以說是可以說的——但公司只有一個試驗站執行，離建立這個網路還有數十億美元和數年的路程。對於一個有著許多優先權、巨大野心和有限資源的公司來說，互換是低掛的水果。

馬斯克還提到，第一批Model X的交付時間只有幾個月；考慮到他的矛盾心理，如果他們完全失去掉期支援也就不足為奇了。