Mercedes EQXX drive, hypermiling the 750-mile solar prototype engineers want to build
![](https://electrek.co/wp-content/uploads/sites/3/2022/07/Mercedes-EQXX.jpeg?quality=82&strip=all&w=1600)
There’s exactly one Mercedes EQXX in existence, and we had the good fortune to be able to drive it around a test track in Southern Germany this week. This is a special car for a number of reasons, but in a nutshell, it is a 100kWh ultra high efficiency EV with a slippery .17 coefficient of drag and 600W of solar panels on top.
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