Heavy duty gas powered battery charger. Honda gc190 engine, gm style 120 amp alternator. I used this at my previous job jump starting fire trucks (4-6 batteries). No longer need. Output 14.7 volts, 90 amps. If you are constantly having to jump start your equipment, car lot cars, etc this is your solution. Cash sale only, no checks, e- payment of any kind. E-mail or text is best method of contact. show contact info