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home > Newmar PT25W 12v Charger 3 Bank 25 Amp > Newmar PT25W 12v Charger 3 Bank 25 Amp

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Newmar PT25W 12v Charger 3 Bank 25 AmpWhy 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 recoverypushing fast

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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 176-264	85-264	90-132 or 180-264	85-135 or 170-270	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 .98@115V	.7	.7	.95@230V .98@115V
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. Rating Reference	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 180-264	85-135 or 170-270	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 .98@115V	.7	.7	.95@230V .98@115V	.7	.95@230V .98@115V
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. Rating Reference	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. Rating Reference	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 A Add 1.27" (3.2 cm) to height and 1.1" (2.8 cm) to depth B Add 1" (2.54 cm) to height and .5" (1.27 cm) to depth C Add 2" (5.08 cm) to height and 1" (2.54 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...
SKU: NVN-1001197
MPN: PT-25W
UPC: 030745360251

Newmar PT25W 12v Charger 3 Bank 25 Amp

Name: Newmar PT25W 12v Charger 3 Bank 25 Amp
Brand: www.midwoodautocraft.com
SKU: 97250253097
Price: 370.50 USD
Availability: InStock
Rating: 4.779400000000001 (345 reviews)