Use of the FE-20 charger does not affect the Leaf's warranty since it's approved by Nissan. The Leaf has long had V2G capability, but this charger makes things even better. It may be old and ...
It’s rated at 1,000 volts and 250 amps, which comes out to 250 kilowatts–much higher than the 62.5-kilowatt maximum DC fast charging rate the latest and greatest Nissan Leaf can accept.