This module can step down voltages from 7-32V down to 0.8-28V, and outputs current 8A! With 95% of efficiency, you do not have to worry about losing power for your applications. In order to achieve high efficiency with high currents, it is highly recommended to use a heat sink to spread out the heat from the module. 

The module does not utilize reverse polarity protection, hence, care must be taken when dealing with this module