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Interacter 12v 5 Amp Professional Series Charger PS1205

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This line of chargers is a BatteryStuff favorite. Made to last in the USA.

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Product InformationStore Part Number: PS1205


Interacter Pro Series 12/5

The Interacter PS series charger utilizes a patented “3 Stage Plus” technology to interact with the battery and provide exactly the right amount of charge. “3 Stage Plus” charging technology eliminates undercharging, overcharging, or damage to the battery, and is completely safe. The internal “battery type DIP switch” can be field set for use with true Gel-Cell, (AGM) Absorbed Electrolyte, or Liquid Electrolyte battery types. #INTPS125

Microprocessor circuitry with a patented program in EPROM, controls four separate charging stages:

  • FIRST: A constant current bulk charge is applied to achieve the fastest possible return of energy to the battery.

  • SECOND: This constant voltage stage is proportionally timed and temperature compensated, minimizing electrolyte breakdown and gas emission.

  • THIRD: The final standby float charge stage will replace standing losses and keep the battery in a fully charged state & “Ready”.

  • PLUS: As soon as the battery is connected, a desulfation circuit encourages the breakdown of large sulfate crystals which can develop during prolonged periods of deep discharge.


Recommended for 12 volt battery systems in the 18 to 80 amp hour range. This charger can be used for both bulk charging and long term stand-by maintenance. This charger is made in the United States.


  • Incorporated in the PS is a sample and hold circuit which eliminates voltage sensing errors and prevents parasitic discharge during A.C. power loss.
  • Electronic short circuit and reverse polarity shutdown, without blowing fuses. This is an exceptional safety feature.
  • The built in electronic timer monitors the time taken from the start of charge until the battery voltage reaches the first preset voltage limit. The time duration for the second stage is automatically calculated in proportion to the time taken for the first stage. This feature is specifically designed to optimize charging on a wide range of battery types, ages and sizes.
  • A customer-preferred LED Amp gauge indicates the current output without the use of fragile meters or energy loss. A green ready indicator shows positively that the battery is ready for use or will flash if there is an override timeout.
  • External Temperature Compensation
  • Electronic Current Limit Protection
  • Unique Desulfation Circuit
  • Short Circuit Shutdown
  • Phase Angle Control
  • Voltage Limited
  • Provides DC Power While Charging
  • Low Voltage Start
  • Powder Coated Finish
  • Modular Construction
  • Digital Microprocessor Control
  • Compact Size
  • Customer Preferred LED Amp Meter
  • Safety Override Timer
  • Green ready Lamp / Fault indicator
  • Timed C.V. Stage / 80% Returned
  • Fully Automatic Operation
  • Proportional Timing
  • Battery Type Switch
  • Optimal 3 Step Charging
  • Built-in Mode Indicators
  • Spark Free Hook Up
  • Demand Sensing
  • Reverse Polarity Protection
  • Over Voltage Protected
  • Short Circuit Protection
  • Overload Protection
  • Line Regulation
  • Temperature Compensation
  • 1 Year Warranty

Tech Specs

  • Dimensions (LxWxH): 6 x 6.5 x 5.25 in
  • Weight: 7.0 lb
  • Shipping Weight: 8.0 lb
  • Max Current, During Bulk Charge: 5 A
  • AC Input Amps: 1 A
  • Model: PS1205
  • Manufacturer: Interacter
  • AC Input Volts: 117 V
  • AC Input Volts Freq.: 60 Hz
  • Output Banks: 1
  • Temperature Compensation: Yes
  • Regulatory Approval: UL Listed
  • Manufacturer Part #: PS1205
  • Made In: USA

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Manuals & Tutorials

User Manual


Chargers Tutorial

Why does it read 13 volts?

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