I recently upgraded 400a solenoid on my cart. It burned up after 2 years. I have 48v series EZGO TXT cart with 700 amp Curtis controller. I decided to try a bigger solenoid. It was very hard finding one. It is very similar to my 400 amp solenoid but much larger. It has 1/2" terminal lugs so I had to get 2 new cables with 1/2" lugs on the solenoid end. The 400 amp solenoid had 3/8" lugs. It is much more beefier and the audible "click" is much louder I guess due to larger contactor.