EMP's Power 450 Brushless Alternator is a robust, high performance alternator that provides “Best in Class Performance at Low Speeds/Idle". A perfect 50 DN drop-in replacement, EMP’s Power 450 Brushless Alternator is a heavy-duty brushless alternator that provides 450 amps at 24 volts and operates with extremely high efficiency. A powerful, robust alternator for harsh on-highway, off-highway and start/stop conditions.