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48 volt (56.8VDC) Model 55i High Output Alternator  
APS high power, 48VDC nominal high output alternators for your heavy duty 48 - 56 volt applications.
  • Model 55i-190EXT-56 190 AMP
  • Requires APS 56RGXTF
  • True 56.8 volt charging and output design
  • Strong performance at low rpm
  • Adjustable setpoint regulator design 
  • ISO 9001 QS quality control 
  • High electrical power chassis
  • Wind turbine
  • Solar Power stations for battery recharge
  • True battery charging design

  • Nominal 48 VDC, true charging 56.8 VDC

  • High Output at all rpms 

  • Heavy Duty Rectifier w/ HD diodes

  • Lighter weight

  • Waterproof "swimmer" design

  • 30 lbs. net weight

  • Universal J180 or "pad" mount

  • 100% Quality Tested Components 

  • V-Belt or Serpentine Belt Compatible

  • Manufactured in the U.S.A.

Product Alternator
Series APS 55i
Regulator Part No APS 56RGXTF
Sales No 55i-190EXT-56J
Output Curve click here
Nominal Volt 48 nominal
Actual Volt Setpoint - State of charge dependant 49 - 56.8 VDC
Rated Output - Amps 190
Mount J-180
Housing Coating Cast Aluminum
UL Approved NO
Mounting Bolt Size 1/2-13 UNC
Positive Stud Size 5/16-18 UNC
Negative Stud Size 5/16-18 UNC
Rectifier Location INTERNAL
Shaft Diameter .8736-.8741
Pulley Not Included
Side dimension

Front dimension

Rear dimension

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