Actually Gary,he clamped 3630w.Don't no where the 4600w came from.Also the 16 v set-up in his vehicle doesn't matter.You may be misunderstanding something.Your amps,on 12v,still put out more wattage than his amps do on 16v.So him having 16v,in his vehicle is doesn't give him,an advantage over your 12v set-up.