604-Series 150 Amp Alternator Designed for Recreational Applications 150 Amp in a Small Case Package Dual Foot 4” Mount (J180 Style) Dual Vee Pulley Up to 65A at Idle Speeds Patented Smart Ready Technology Dual Fan Cooling High Airflow Frame Maximum RPM: 12,000 USCG Title 33, ISO, SAE and CE Compliant Balmar 604-Series Alternators deliver high-output performance in a compact case. While all Balmars high-output alternators are designed and recommended for use with their multi-stage voltage regulators, the 604-Series Alternator utilizes Balmars Smart Ready Technology. Smart Ready internal regulation enables the alternator to be used as a stand-alone, charge controller that is ideal as a built-in backup regulator for the cruiser, or as a full-time regulator for systems where Smart Multi-Stage Regulation is not required. If battery loads are relatively small and your engine is running frequently, the alternators internal regulator may be sufficient to support your electrical needs without external regulation. If your vessel utilizes larger deep-cycle battery banks or the engines duty cycle is less frequent (as is the case in most sailing applications), the 6-Series Alternator combines and works seamlessly with Balmars ARS-5 Voltage Regulator or Max Charge Voltage Regulators.