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Phase Three Series 12 Volt Battery Chargers

Phase Three Series Battery Chargers for marine applications, 12V DC, 7 - 80 amps image by Newmar DC Power Onboard
ABS Logo and American Bureau of Shipping (ABS) Certificate for Newmar's Marine Application Battery Chargers Phase Three Series

Newmar’s Phase Three Series Battery Chargers employ “Smart” battery charging technology for 12 volt systems aboard marine applications including workboats, military vessels, commercial vessels, and recreational craft. These chargers interact with batteries providing the optimum three stage charge process for fast recovery and conditioning, maximizing performance and extending battery life.

A selector switch adjusts output voltage to adapt to gel-cell/flooded lead-acid/AGM battery types. An optional temperature compensation sensor also adjusts output for ideal voltage based on changes in the batteries’ ambient temperature. All models are housed in a rugged stainless steel case with a durable white powder coat finish, and the internal circuitry is polyurethane coated for maximum corrosion resistance.

Instruction Manuals

PT-7 Manual
PT-14W Manual
PT-25W Manual
PT-40U Manual
PT-40U with Fan Replacement Manual
PT-80 Manual

CE Certificates

Model PT-7
Model PT-14W
Model PT-40U


  • “Smart” circuitry provides three stage charging – bulk, absorption, float
  • Gel-Cell/Flooded Lead-acid/AGM battery type switch selects optimum charge/float voltages
  • Multiple isolated output banks; ammeter indicates total output current. (Except PT-7)
  • Optional sensor adjusts output voltage based on battery temperature. (Except PT-7)
  • Current limiting-prevents damage from overloading
  • Clean well regulated output can be used as a power supply; can power loads directly without a battery in line
  • Built to last – rugged stainless steel case with a durable white powder coat finish with an optional drip shield and marinized internal circuitry
  • Protection: Current Limiting, Thermal Protection, Forced Air Cooling, Drip Shield
  • ABS type approval for battery charging and power supplies


12 Volt ModelsPT-7PT-14WPT-25WPT-40UPT-80
Input VAC
(50-60 Hz.)
88-132 or
85-26490-132 or
Input Amps
@ Full Load
@ 115 VAC22.86.56.812
@ 230 VAC11.443.47
P.F. Rating>.65.93@230V
.7.98 @ 115V
.95 @ 230V
Max Output Amps714254080
Output Banks23333
Battery Capacity
Operating Temp.
Rating Reference
Case Size Ref.A-1A-2A-2A-3A-5
Weight; Lbs./Kg.3.2/1.58/48.2/411/615.2/7
Optional Temp.
Sensor Model
Remote Panel ModelN/ARPRPEVM-12-2RP
Equalize OptionNoYesYesNoYes
Output Indicator Ref.M-1M-3M-3M-3M-3
Compliance Ref.CG, CECG, CECGCGCE

Temperature Rating References

 TemperatureDerate Linearly From
T-1-10˚ C to +45˚ C100% @ 0˚ C to 80% @ -10˚ C
T-2-10˚ C to +60˚ C100% @ 40˚ C to 60% @ 60˚ C
T-3-10˚ C to +60˚ C100% @ 40˚ C to 60% @ 60˚ C
T-4-20˚ C to +60˚ C@ 50˚ C to 60% @ 60˚ C
T-7-10˚ C to +60˚ C100% @ 50˚ C to 80% @ 60˚ C

Case Size References

Nominal Output Voltages at Gel/Flooded Switch Settings
(without Temperature Compensation)

SettingCharge @ 50% loadFloat @ .5 amp load
Gel-Cell14.0 VDC13.6 VDC
Flooded/AGM14.2 VDC13.4 VDC

Compliance References

CG: USCG CFR 183.410 (Ignition protected)
CE: Carries the CE mark
ABS: PT Series meet SVR 2009 4-8-3/5.9, Under 90 meters Rules 2006 4-6-4/7.19, and HSNC 2007 4-8-3/5.13.


Remote Panel, model RP, for use with all models except PT-7 and PT-40U
LED’s indicate charger output stage. Manual re-initialization of three stage charge cycle. With 25′ of cable. Panel dimensions: 3″ H x 4.75″ W

Newmar's Phase Three Series Battery Charger Remote Panel, model RP

Remote Panel, model EVM-12-2, for us with model PT-40 only
Enables monitoring of when the battery charger is “on” and the batteries’ state of readiness, at a glance of two (2) battery banks only

Emergency Vehicle Monitor, 12V DC, 2 battery bank monitor by Newmar

Temperature Compensation Sensor, Model TCS 12/24, for use with all models except PT 7
-5 mV per cell˚ C, 25′ cable (40’cable optional)

Newmar's Phase Three Series Battery Charger Temperature Compensation Sensor