Nissan Leaf's fast-charge capability optional. Why? — Autoblog Green "We knew long ago that the Nissan Leaf would not be capable of level three fast-charging from the get-go, and there's good reason for this, which we'll get back to in a bit. It's now been brought to our attention that many of those who are pre-ordering the Leaf are shocked to find out that fast-charging is optional. What may first look like an oversight by the company really isn't at all. Nissan simply failed to outline exactly why fast-charging is optional, so we'll do it for you."