Bosch's ultra-premium Long Haul Alternator for heavy duty vehicles provides greater electrical power and efficiency on the road or at idle, and is designed to keep generating electrical power even when the underhood temperature climbs to as much as 125 degrees Celsius (257 degrees Fahrenheit). Producing 160 amps operating output, and 80 amps at idle, the Long Haul's higher charge rate at idle prolongs battery life by reducing deep cycling. Plus, the Long Haul is built to "really take the heat." Dual internal cooling fans are optimized for air flow and help maintain the Long Haul's even temperature under all operating conditions. Most other alternators fail at slightly over 110 degrees Celsius (230 degrees Fahrenheit).