Coşul tău este gol!
Convertor DC 48V>12V, putere iesire 400W 33A, 200x139x66mm.
Up converting or BOOST is less efficient than is down converting or BUCK. This is why all household systems run on 48v and not 12v. The conversion from 12v to 120-220V or more is like 80-85% efficient while 48v to 120v or more can be as good as 95%.