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Multi-Stage Regulators for 12V and 24V Systems Maintain Proper Battery Charging

Charles Multi-Stage Regulators are designed to control the power of the alternator output and maintain the proper battery charging voltage regardless of the engine speed.  The charge effect of the alternator depends solely on the electronic three-stage regulator.  These units have been designed for use with a wide variety of type-P alternators.


Multi-Stage Regulator

Technical Information

  • Utilizes microprocessor-controlled technology to regulate the alternator output
  • Multi-stage charging: 1st current is limited by the alternator, 2nd absorption stage current begins to fall off, 3rd float or maintenance stage.  Charging profile is adjustable.
  • Ignition protected
  • Smart overload protection
  • Temperature compensation
  • LED charge state indicators
  • Corrosion-resistant components
  • Marine UL Listed
  • 2-year warranty, made in the USA

Product No.



Bulk Rate
Output Volts
at 25 C

Float Rate




12V Multi-Stage Regulator

Gel / Lead 




1.5 lbs.


24V Multi-Stage Regulator

Gel / Lead 

28.2VDC 27.3VDC 7.25x7.5x2.75

1.5 lbs.


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