High-Output 24V 4kW Low Turn-On Alternator for Mercedes Sprinter N62 Applications

Maximise charging performance at low engine speeds with this 24V 4kW Low Turn-On (LTO) high-output alternator. Featuring an N62 mounting configuration with a 50mm K6 overrunning alternator pulley (OAP), this alternator is engineered to deliver exceptional charging output from idle while maintaining cooler operating temperatures than conventional 24V alternators. Its native 24V rotor and field design improves efficiency across the entire RPM range, making it suitable for large battery banks in RV, commercial, marine and specialist vehicle applications where dependable charging at low engine speeds is essential.

Key Features

• 4kW High-Output Charging: Produces up to 144A (3,960W) at 27.5V to rapidly recharge large 24V battery banks.
• Low Turn-On (LTO) Performance: Begins charging at just 1,072 alternator RPM, providing significantly greater charging output at idle than conventional high-output alternators.
• Native 24V Design: Utilises a true 24V rotor and field current for improved efficiency, cooler operation and longer service life compared with alternators using a 12V rotor design.
• Excellent Idle Charging: Delivers up to 108A (2,970W) sustained output at 3,000 alternator RPM, making it ideal for applications where extended idle charging is required.
• Optimised for Cruising Speeds: Produces up to 130A (3,575W) sustained output at cruising RPM for continuous high-capacity battery charging.
• N62 Mount with 50mm K6 OAP: Configured with an N62 housing and 50mm K6 overrunning alternator pulley for compatible Mercedes Sprinter dual-alternator installations.
• External Regulation: Designed for use with an external alternator regulator, including the ARCO Zeus Bluetooth Alternator Regulator for advanced charging control.
• Heavy-Duty Cooling System: Features dual cooling fans, exterior-mounted rectifier and heat-shedding E-coat finish to maintain lower operating temperatures under sustained loads.
• High-Reliability Internal Components: Equipped with avalanche-rated 50A diodes and premium internal components for dependable continuous operation.
• SAE J1171 Certified: Certified for ignition protection and proudly manufactured in the USA.

Built for demanding charging applications, this 24V alternator delivers exceptional low-speed output while reducing reliance on generators and helping maintain large battery systems more efficiently.