6-Series Alternators

Find the Right Balmar Charging System for your engine

Not Ready to Configure? First Review Our Selecting a Charging System Guide.​

621-VUP-100-K66-Series Alternators
Designed for Recreational Applications

  • Balmar’s Top Selling Alternator Line
  • 70A, 100A and 120A Versions
  • Patented Smart Ready® Technology
  • Dual Fan Cooling
  • High Airflow Frame
  • Maximum RPM: 12,000
  • USCG Title 33, ISO, SAE and CE Compliant
  • Ideal for Modest Charging Upgrades

Balmar 6-Series Alternators deliver high-output performance in a compact, small-case package and is available in all four common mounting configurations (see Selecting a Charging System).

While all Balmar’s high-output alternators are designed and recommended for use with our multi-stage voltage regulators, the 6-Series Alternator utilizes Balmar’s Smart Ready® Technology. 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), the 6-Series Alternator combines and works seamlessly with Balmar’s ARS-5 Voltage Regulator or Max Charge Voltage Regulator.

Purchased either individually or as a charging kit, 6-Series Alternators can solve a multitude of charging problems at a reasonable price. All kits come with alternator, regulator and two temperature sensors.

6-Series OutputPower Take OffMountingIndividual Alternator
Part Number
Alternator Kit
with Max Charge Regulator
Altmount® Pulley Kit Required?
100 A4.0 HP1-2" Spindle621-100-SV621-VUP-MC-100-SVNo
621-100-DV621-VUP-MC-100-DV
621-100-K6621-VUP-MC-100-K6
621-100-J10621-VUP-MC-100-J10
3.15" Saddle60-100-SV60-YP-MC-100-SV
60-100-DV60-YP-MC-100-DV
60-100-K660-YP-MC-100-K6
60-100-J1060-YP-MC-100-J10
120 A4.8 HP1-2" Spindle621-120-DV621-VUP-MC-120-DVYes,
If a Dual Vee or Serpentine Pulley is Not Already Present,
See the
AltMount® Conversions Page
621-120-K6621-VUP-MC-120-K6
621-120-J10621-VUP-MC-120-J10
3.15" Saddle60-120-DV60-YP-MC-120-DV
60-120-K660-YP-MC-120-K6
60-120-J1060-YP-MC-120-J10
4" Saddle604-120-DVKit Not Available
Purchase Separately
604-120-K6
70 A, 24V5.6 HP1-2" Spindle621-24-70-DV621-VUP-24-70-DV
621-24-70-K6621-VUP-24-70-K6
621-24-70-J10621-VUP-24-70-J10
3.15" Saddle60-24-70-DV60-YP-24-70-DV
60-24-70-K660-YP-24-70-K6
60-24-70-J1060-YP-24-70-J10
4" Saddle604-24-70-DVKit Not Available
Purchase Separately
604-24-70-K6
A Max Charge Regulator Kit is required for 24 volt, Dual-Alternator or Dual Engine Applications.