I bought the 15amp version, it doesn't put out 15 amps. it puts out 13amps, and 7amps on the slow setting. the fan is very loud too, much louder than other other charger I have.
do not buy this piece. way overpriced and built like sh*t. not to mention a super dinky AC cord was supplied that while using at 15a. it almost melted. if you do buy it. save yourself a fire and replace the power cord with a c13 setup rated for 15a. any electronics store will typically carry it. I'd suggest staying away entirely from it