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PowerMax 12v 45 Amp Charger Converter Power Supply

Was: $129.00
Sale Price: $113.95
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Product InformationStore Part Number: PM3-45-12


Using only the best in manufacturing technology, Power Max has designed and built a powerhouse charger/converter. Capable of providing a constant load demand of up to 100% of its rated capacity, the PM3 series converters are among the best. Pumps, fans, motors, and radio equipment will run with no problems on the PM3 RV converter/charger. 

Each PM3 charger/converter has a fully integrated 3 stage microprocessor controller charger along with its highly controlled power supply output. The PM3 can accept a low voltage input of 105 volts, and up to 135 VAC on the high end. Weighing in at only 7 pounds, the PM3-45-12 is a great option for RV, radio, backup power, and pump use, as well as many other low- to mid-amperage demands. See the PM-55-12 for a 55 amp capacity PM3 converter/charger. Because of its high demand abilities, the PM3 must be installed in a well-ventilated area where it will be safe from the environment. 


  • Optimal 3 Step Charging
  • Demand Sensing
  • Reverse Polarity Protection
  • Over Voltage Protected
  • Short Circuit Protection
  • Overload Protection
  • Line Regulation
  • Load Regulation
  • Thermal Protection
  • 2 Years Warranty


* Flat Rate shipping is for the lower 48 states only.

Tech Specs

  • Dimensions (LxWxH): 7.15 x 10.5 x 3.45 in
  • Weight: 7 lb
  • Shipping Weight: 7.5 lb
  • Output Amperage, Max Continuous: 45 A
  • Max Current, During Bulk Charge: 45 A
  • Output Voltage Full Load: 13.4 V
  • No Load Voltage: 13.6 V
  • Maximum AC Current @ 108 VAC: 9 A
  • AC Input Volts: 115 V
  • AC Input Volts Freq.: 47/63 Hz
  • AC Input Volts Range: 105–135 V
  • Model: PM3-45-12
  • Manufacturer: Power Max
  • Float Current: Variable
  • Float Voltage: 13.56 V
  • Typical Efficiency: 85%
  • Maximum Power Output, Continuous: 650 W
  • Charge Reset: Battery Voltage Threshold: 12.6 V
  • Working Temperature: 0° to 45° C
  • Storage Temperature: -20° to 80° C
  • Over Temperature: 80° C
  • Ripple and Noise: 100 mV rms
  • Output Banks: 1
  • Regulatory Approval: UL Listed (File #E201433/SRV45)
  • Manufacturer Part #: PM3-45LK
  • UPC: 685867998020
  • Made In: China

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Reviews and Ratings

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Rated 5.00/5 Stars from 1 customer reviews.

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Power Max 45 amp Battery Charger
Pros: I needed this for my Battery/Inverter set-up in my 5th wheel. I use it when the generator is running to recharge my bank of CROWN 205 6v batteries. It works just as promised. Kicks butt! I'm very happy with this purchase. Bang for the buck,... it's untouchable!!
Cons: There's NOTHING I don't like about this thing, or They were great, supportive, and I got a great deal on an awesome charger!
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Written by on Mar 29, 2017. Ownership: Use regularly. Knowledge Level: AC/DC is more than a band — (7 of 8 customers found this review helpful

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