621-Series, 24 Volt, 70 Amp, Single Foot, Alternator Kit
4.5 out of 5 Customer Rating
Model # 18087916 Mfg # 621VUP-24-70-K6
Model # 18087916 Mfg # 621VUP-24-70-K6
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621-Series 70 Amp 24 Volt Alternator Kit

Designed for Recreational Applications

  • 70 Amp in a Small Case Package
  • Single Foot 1" / 2” Mount
  • K6 Pulley
  • Up to 25A 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 621-Series Alternators deliver high-output performance in a compact case. While all Balmar’s high-output alternators are designed and recommended for use with their multi-stage voltage regulators, the 621-Series Alternator utilizes Balmar’s 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 alternator’s internal regulator may be sufficient to support your electrical needs without external regulation. If your vessel utilizes larger deep-cycle battery banks or the engine’s duty cycle is less frequent (as is the case in most sailing applications).

Max Charge MC-624 Voltage Regulator

  • 7 Selectable Programs for Marine Batteries
  • 15 Amp Maximum Field Current
  • Advanced Programming Modes
  • Alternator & Battery Temperature Sensing & Control
  • Exclusive Belt Load Manager Function
  • Bright LED Display and Easy Programming Mode
  • Can be Used in Twin-Engine Applications with Centerfielder Ii Temperature Sensor Cables
  • Temp Sensors can be used for 12 Volt and 24 Volt Systems
  • MC-TS-A – Alternator Cable, 54” Length
  • MC-TS-B – Battery Cable, 240” Length

  • Dimensions 5.68" (145 mm) Diameter x 5.10" (130 mm) Length x 9.67" (246 mm) Height
    ISO Approved USCG Title 33 , ISO , SAE , CE Compliant
    Mount Type Single Foot 1" or 2"
    Outputs 1 Output
    Pulley Groove Type Serpentine Groove
    Pulley Outside Diameter 2.45 Inches
    Rated Output Power - 2000 RPM Hot 25 Amps
    Rated Output Power - 6000 RPM Hot 55 Amps
    Type Alternator/External Smart Regulator
    Voltage 24 Volts DC
    Warranty One Year Limited Warranty against Defects in Material or Workmanship