Most electric vehicles on the road now use Level 2 chargers, which put out 32 amps and 240 volts of charging power. Older models that still use Level 1 chargers can accept only 16 amps and 140 volts. A 40-amp, 240-volt charger would offer your car 9.6 kilowatts. Most electric cars on the market cannot even accept more than 7.2 kilowatts. While the 40-amp, 250-volt J1772 adapters are typically more than sufficient for most consumers, there are some non-Tesla electric cars that would benefit from the adapters with higher amperage. If a vehicle can accept a higher charging power, it will charge faster with the more powerful adapters. A few of these vehicles are below. Audi E-Tron Mercedes B Class B250e Toyota Rav4 Audi E-Tron Mercedes B Class B250e Toyota Rav4 These three vehicles can all accept kilowattage greater than 7.2. They will charge faster when plugged into a more powerful adapter. Check your vehicle’s manual to determine what kilowattage your car can accept so you can avoid buying the wrong adapter. While some extra power will not hurt, too much can cause the adapter to overheat. An argument for the powerful adapters, though, is that they will work for future generations of electric vehicles. It’s often referred to as future proofing preparing for what might be available (or needed) in the next several years. As electric vehicles get more powerful, their maximum accepted kilowattage will increase. If you have a 40-amp (or greater) charging adapter, any vehicle that comes out with 7.2 to 9.6 kilowatts will charge more quickly.