Newmar PT25W 12v Charger 3 Bank 25 Amp
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Newmar PT25W 12v Charger 3 Bank 25 Amp Product Description
Why Choose the Newmar PT25W for Your Marine or RV Power Needs?
Keeping your batteries in peak condition is crucial when you're out on the water or hitting the open road in your RV. The Newmar PT25W stands out as a reliable workhorse, delivering 25 amps across three independent banks to charge house, engine, and thruster batteries simultaneously without cross-contamination. Its smart Phase Three technology mimics natural battery recovery—pushing fast bulk charging, then fine-tuning with absorption and float stages—to squeeze every bit of life from your 12V gel-cell, flooded lead-acid, or AGM batteries.
Built for harsh environments, this charger's stainless steel chassis with white powder coat finish shrugs off salt spray, humidity, and vibrations common in boating or mobile setups. Imagine returning to your vessel after a long day, knowing your power system is fully optimized and ready for the next adventure, all thanks to current limiting that protects against overloads and clear LED indicators that let you monitor at a glance.
Key Features That Deliver Real-World Performance
- Three Isolated Banks: Charge multiple battery sets at once—perfect for boats with separate starting and house banks or RVs with accessory systems—ensuring even distribution without risking damage from imbalances.
- Adaptive 3-Stage Charging: Bulk stage recovers capacity quickly, absorption completes the charge safely, and float maintains without overcharging, potentially doubling battery lifespan in demanding applications.
- Battery Type Selector: Switch effortlessly between gel-cell, flooded, or AGM settings to match your setup's exact needs, optimizing voltage for faster, healthier charging.
- Universal Input (115-230V AC): Plug in anywhere from shore power to generators, with automatic handling of 50/60Hz frequencies for global versatility.
- Robust Protection: Marinized internals with polyurethane coating resist corrosion, while current limiting and short-circuit safeguards keep operations safe even under heavy loads.
- Power Supply Mode: Run DC loads directly without batteries connected—handy for testing or emergency power in tight spots.
- Monitoring Made Easy: Built-in ammeter shows total output, with optional remote panel or temperature sensor for precise control in varying conditions.
How Phase Three Smart Charging Maximizes Your Batteries
Traditional chargers can boil batteries dry or leave them undercharged. The PT25W's intelligent circuitry senses battery state and adjusts automatically:
- Bulk Phase: High current (up to 25A per bank) rapidly replenishes depleted energy, ideal after heavy use like trolling motors or inverters.
- Absorption Phase: Holds voltage steady (around 14.0-14.2V depending on type) to fill the last 20-30% without gassing or heat buildup.
- Float Phase: Drops to maintenance levels (13.4-13.6V) to counteract self-discharge, readying batteries for instant startup.
Add the optional temperature sensor, and it fine-tunes output for hot engine rooms or cold bilges, preventing under- or over-charging that shortens life.
Technical Specifications at a Glance
| Attribute | Value |
|---|---|
| Output Banks | 3 Independent |
| Max Charge Current | 25 Amps Total |
| Output Voltage | 12V DC (Nominal) |
| Input Voltage | 90-132 / 180-264 VAC (50/60 Hz) |
| Dimensions (L x W x H) | 12.5" x 7.7" x 4.3" |
| Suitable Battery Capacity | 50-250 Amp-Hours per Bank |
| Weight | 8.2 lbs |
| Operating Temperature | -10°C to +60°C (Derating applies) |
Compact A-2 case size fits tight compartments while handling serious power demands.
Simple Installation and Maintenance Tips
Mount securely in a dry, ventilated area using the pre-drilled flanges. Connect heavy-duty cables (at least 8 AWG for 25A runs) to each bank, matching polarity meticulously. Set the battery type switch before first use, and consider the temp sensor for engine bay installs where heat swings are common.
Maintenance is minimal: Wipe the exterior occasionally, check connections for corrosion, and rely on the self-diagnostic LEDs. In multi-bank setups, rotate charging focus periodically for balanced wear.
Frequently Asked Questions
Can the Newmar PT25W charge different battery types simultaneously?
Yes, each of the three banks operates independently, but set the selector switch to match your batteries (gel, flooded, or AGM). The charger applies the chosen profile across all banks for consistency.
Is this charger suitable for marine environments?
Absolutely—its corrosion-resistant polyurethane-coated boards, stainless steel case, and ignition protection make it ideal for boats, complying with key safety standards for wet, salty conditions.
What if I don't have batteries connected—can it still power my system?
Yes, it functions as a clean DC power supply in power supply mode, delivering stable 12V output directly to loads without a battery, great for diagnostics or bypass scenarios.
How do I know when charging is complete?
LED indicators show charge status, and the ammeter drops near zero in float mode. Optional remote panels provide detailed readouts from anywhere on board.
Does it support temperature compensation?
Yes, pair it with the compatible TCS-12/24 sensor to automatically adjust voltage based on battery temperature, optimizing charge in hot or cold extremes.
What's the ideal battery size for this charger?
It's optimized for 50-250 amp-hour banks per output, balancing speed and safety—charge time for a 100Ah battery from 50% is typically under 3 hours.
25 Amp Phase Three Series Battery ChargerThe "Smart" Charger for Almost Any ApplicationPhase Three "Smart" battery charging technology allows you to select the right size, features and flexibility you require for virtually any application from small recreational craft to large live-aboards, workboats and other commercial vessels. These chargers interact with batteries to put them through the optimum three stage charge process which provides for fastest recovery and ideal conditioning, maximizing battery performance and extending battery life.A selector switch adjusts output voltage to adapt for 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 choice of a natural or durable white powder coated finish, and the internal circuitry is polyurethane coated for maximum corrosion resistance.
NewMar PT25W Attributes
- Number Of Banks: 3
- Application: 12 Volt Batteries
- Output Voltage: 12 Volt
- Input Voltage: 115 To 230 Volt
- Ampere Rating: 25 Amp Charging
- Universality: Fully Universal
- Length (IN): 12-1/2 Inch
- Width (IN): 7.7 Inch
- Height (IN): 4.3 Inch
NewMar PT25W Features & Benefits
- Smart circuitry provides three stage charging--bulk, absorption, float.
- Multiple isolated output banks; ammeter indicates total output current.
- Optional sensor adjusts output voltage based on battery temperature.
- Current limiting-prevents damage from overloading.
- Charger status clearly displayed with L.E.D., ammeter, or optional remote panel.
- Use as a power supply; can power loads without a battery in line.
- Optional drip shield and marinized internal circuitry.
- Numerous Safety and EMC Compliances
- Two year parts and labor warranty
Three Stage "Smart" Chargers
Phase Three "Smart" battery charging technology is now available in a wide range of power levels, allowing you to select the right size, features and flexibility you require for virtually any application from small recreational craft to large live-aboards, workboats and other commercial vessels. These chargers interact with batteries to put them through the optimum three stage charge process which provides for fastest recovery and ideal conditioning, maximizing battery performance and extending battery life.
A selector switch adjusts output voltage to adapt for 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.
Features
-
"Smart" circuitry provides three stage charging?bulk, absorption, float.
-
Wide model range covers battery system ratings from 14-950 amp-hours
-
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.
-
Charger status clearly displayed with L.E.D. and/or audible indicators or optional remote panel.
-
Use as a power supply; can power loads 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.
-
Numerous Safety and EMC CompliancesTwo year parts and labor warranty
Models
| 12 Volt | 24 Volt | 32 Volt |
| PT-7 | PT-24-8W | PT-32-25W |
| PT-14W | PT-24-13W | |
| PT-25W | PT-24-20U | |
| PT-40U | PT-24-45U | |
| PT-80 | PT-24-60W | |
| PT-24-95U | ||
| Detailed specifications below. | ||
Specifications
| 12 Volt Models | PT-7 | PT-14W | PT-25W | PT-40W | PT-80 |
| Input VAC (50-60 Hz.) | 88-132 or | 85-264 | 90-132 or | 85-135 or | 90-264 |
| Input Amps @ Full Load | |||||
| @ 115 VAC | 2 | 2.8 | 6.5 | 8.5 | 12 |
| @ 230 VAC | 1 | 1.4 | 4 | 4.3 | 7 |
| P.F. Rating | >.65 | .93@230V | .7 | .7 | .95@230V |
| Max Output Amps | 7 | 14 | 25 | 40 | 80 |
| Output Banks | 2 | 3 | 3 | 3 | 3 |
| Battery Capacity (Amp-Hours) | 14-70 | 28-140 | 50-250 | 80-400 | 160-800 |
| Operating Temp. | T-1 | T-2 | T-4 | T-5 | T-7 |
| Case Size Ref. | A-1 | A-2 | A-2 | A-3 | A-5 |
| Weight; Lbs./Kg. | 3.2/1.5 | 8/4 | 8.2/4 | 12/6 | 15.2/7 |
| Optional Temp.Sensor Model | N/A | TCS-12/24 | TCS-12/24 | TCS-12/24 | TCS-12/24 |
| Remote Panel Model | N/A | RP | RP | RP | RP |
| Equalize Option | No | Yes | Yes | Yes | Yes |
| Output Indicator Ref. | M-1 | M-3 | M-3 | M-3 | M-3 |
| Compliance Ref. | CG, CE | CG, CE | CG | CG, CE | CE |
| 24 Volt Models | PT-24-8W | PT-24-13W | PT-24-20U | PT-24-45U | PT-24-60W | PT-24-95U |
| Input VAC (50-60 Hz.) | 85-264 | 90-132 or | 85-135 or | 90-264 | 207-253 | 90-264 |
| Input Amps @ Full Load | ||||||
| @ 115 VAC | 2.8 | 6.5 | 8.5 | 12 | NA | 26 |
| @ 230 VAC | 1.4 | 4 | 4.3 | 7 | 13 | 14 |
| P.F. Rating | .93@230V | .7 | .7 | .95@230V | .7 | .95@230V |
| Max Output Amps | 8 | 13 | 20 | 45 | 60 | 95 |
| Output Banks | 3 | 3 | 3 | 3 | 3 | 3 |
| Battery Capacity (Amp-Hours) | 16-80 | 26-130 | 40-200 | 90-450 | 120-600 | 180-950 |
| Operating Temp. | T-2 | T-3 | T-5 | T-8 | T-6 | T-8 |
| Case Size Ref. | A-2 | A-2 | A-3 | A-5 | A-6 | A-6 |
| Weight; Lbs./Kg. | 8/4 | 8.2/4 | 12/6 | 12.2/6 | 24.1/11 | 24.5/11 |
| Optional Temp.Sensor Model | TCS-12/24 | TCS-12/24 | TCS-12/24 | TCS-12/24 | TP | TCS-12/24 |
| Remote Panel Model | RP | RP | RP | RP | N/A | RP |
| Equalize Option | Yes | Yes | Yes | Yes | No | Yes |
| Output Indicator Ref. | M-3 | M-3 | M-3 | M-3 | M-2 | M-3 |
| Compliance Ref. | CG, CE | CG | CG, CE | EN, CE | EN, CE | EN, CE |
| 32 Volt Model | PT-32-25W |
| Input VAC (50-60 Hz.) | 104-126 |
| Input Amps @ Full Load | |
| @ 115 VAC | 15 |
| @ 230 VAC | N/A |
| P.F. Rating | .7 |
| Max Output Amps | 25 |
| Output Banks | 3 |
| Battery Capacity (Amp-Hours) | 50-250 |
| Operating Temp. | T-6 |
| Case Size Ref. | A-4 |
| Weight; Lbs./Kg. | 12.2/6 |
| Optional Temp.Sensor Model | TP |
| Remote Panel Model | N/A |
| Equalize Option | No |
| Output Indicator Ref. | M-2 |
| Compliance Ref. | EN, CE |
Case Size
| Inches | Centimeters | |||||
| Ref | H | W | D | H | W | D |
| A-1 | 10.5 | 5.0 | 2.8 | 26.7 | 12.7 | 7.1 |
| A-2 | 12.5 | 7.7 | 4.3 | 31.8 | 19.6 | 10.9 |
| A-3 | 13.85* | 9.5 | 4.8* | 35.2* | 24.1 | 12.2* |
| A-4 | 13.8A | 9.8 | 5A | 35A | 24.9 | 12.7A |
| A-5 | 14.8B | 9.6 | 5.6B | 37.6B | 24.4 | 14.2B |
| A-6 | 17.5C | 12 | 7.2C | 44.5C | 30.5 | 18.3C |
| * Add .75" (1.9 cm) to height and 1.35" (3.4 cm) to depth | ||||||
Temperature Rating References:
| T-1 | -10°C to +45°C; Derate linearly from 100% @ 0°C to 80% @ -10°C |
| T-2 | -10°C to +60°C; Derate linearly from 100% @ 40°C to 60% @ 60°C |
| T-3 | -10°C to +60°C; Derate linearly from 100% @ 50°C to 60% @ 60°C |
| T-4 | -10°C to +60°C; Derate linearly from 100% @ 40°C to 60% @ 60°C |
| T-5 | -40°C to +60°C; Derate linearly from 100% @ 50°C to 75% @ 60°C |
| T-6 | -20°C to +50°C; Full output |
| T-7 | -20°C to +70°C; Derate linearly from 100% @ 45°C to 50% @ 70°C |
| T-8 | -20°C to +70°C; Derate linearly from 100% @ 50°C to 50% @ 70°C |
Output Indicator References
| M-1 | Total output ammeter |
| M-2 | Charge/Float L.E.D. |
| M-3 | Total output ammeter and charger status L.E.D.'s/Alarms |
Compliance References*
See matrix for applicable models
CG USCG CFR 183.410 (Ignition protected)
EN EN 60335-1, EN 60335-2-29
CE Carries the CE Mark
* Numerous other Safety and EMC compliances may also apply. Contact factory if further compliance
information is required.
Nominal Output Voltages at Gel/Flooded Switch Settings
(Without Temperature Compensation option installed or at 22.2˚C (72˚F) with Temperature
Compensation option installed.)
| | 12 Volt Models | 24 Volt Models | 32 Volt Model | |||
| Charge | Float | Charge | Float | Charge | Float | |
| Setting | @ 50% load | @ .5 amp load | @ 50% load | @ .5 amp load | @ 50% load | @ .5 amp load |
| Gel-Cell | 14.0 VDC | 13.6 VDC | 28.0 VDC | 27.2 VDC | 37.3 VDC | 36.2 VDC |
| Flooded/AGM | 14.2 VDC | 13.4 VDC | 28.4 VDC | 26.8 VDC | 37.8 VDC | 35.7 VDC |
Three-stage "smart" charger stage Now, the "three" "smart" battery charging technology is suitable for various power levels, allowing you to choose the right size, function and flexibility...
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Newmar PT25W 12v Charger 3 Bank 25 Amp Technical Specifications
| Type: | |
|---|---|
| Vendor: |
NewMar |
| Weight: |
10.0 lb |
Newmar PT25W 12v Charger 3 Bank 25 Amp User Reviews
Newmar PT25W 12v Charger 3 Bank 25 Amp Shipping & Return
| Shipping Weight: |
10.0 lb |
|---|---|
| Box Sizes: |
1.00 (h) x 1.00 (w) x 1.00 (l) |
| Cubic Feet: |
1.0 |
| Returnable: |
Yes |
| USPS First Class: |
Yes |
| P65: |
Yes |
| Truck Delivery: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.