Newmar PT-25W Battery Charger

Enhance the performance and longevity of your marine batteries with the PT-25W Battery Charger, designed specifically for demanding marine and boating applications. Whether you're outfitting a workboat, military vessel, commercial ship, or recreational craft, this smart charger ensures your 12-volt battery systems are always in optimal condition.

Advanced Smart Charging Technology

Newmar’s Phase Three Series Battery Chargers utilize cutting-edge smart charging technology tailored for marine environments. The PT-25W interacts intelligently with your batteries, providing a precise three-stage charging process that includes bulk, absorption, and float stages. This ensures quick recovery, thorough conditioning, and maximized battery performance while significantly extending battery life.

Versatile Charging Options

Adaptable to various battery types, the PT-25W features a selector switch that allows you to choose between gel-cell, flooded lead-acid, or AGM batteries. Additionally, the optional temperature compensation sensor automatically adjusts the output voltage based on ambient temperature changes, ensuring ideal charging conditions under all circumstances.

Durable Marine-Grade Construction

Built to withstand harsh marine environments, the PT-25W is housed in a rugged stainless steel case with a durable white powder coat finish. The internal circuitry is polyurethane coated to provide maximum resistance to corrosion, ensuring reliability and longevity even in the most challenging conditions.

Key Features

• 12-volt model designed for marine applications
• Three-stage smart charging: bulk, absorption, and float
• Selector switch for Gel-Cell, Flooded Lead-acid, or AGM batteries
• Multiple isolated output banks with ammeter for total output current (Except PT-7)
• Optional temperature compensation sensor for optimal voltage adjustment (Except PT-7)
• Built-in current limitations to prevent overloading and damage
• Clean, well-regulated output suitable as a power supply for direct loads without a battery
• Rugged stainless steel exterior with optional drip shield and marinized internal circuitry
• Comprehensive protection features: Current Limiting, Thermal Protection, Forced Air Cooling, Drip Shield
• ABS-type approval for battery charging and power supplies

Detailed Specifications

Parameter	Details
Input Voltage (VAC, 50-60 Hz)	90-132 or 180-264
Input Amps @ Full Load	6.5 @ 115 VAC, 4 @ 230 VAC
Power Factor	0.7
Max Output Amps	25
Output Banks	3
Battery Capacity (Amp-Hours)	50-250
Operating Temperature Rating Reference	T-4
Case Size (H x W x D)	11.2" x 7.7" x 4.75" (31.8 cm x 19.6 cm x 12.1 cm) *With Dripshield: +1.1” height, +0.92” depth
Weight	8.2 lbs / 4 kg
Optional Temperature Sensor Model	TCS-12/24
Remote Panel Model	RP
Equalize Option	Yes
Output Indicator Reference	M-3
Compliance Reference	CG

Temperature Ratings

Temperature Range	Performance
-20°C to +60°C	Operates effectively across a wide temperature spectrum.
Above 50°C	Derates linearly from 100% at 50°C to 60% at 60°C.

Nominal Output Voltages

Configured without temperature compensation, the PT-25W provides precise voltage settings based on the selected battery type:

• Gel-Cell: 14.0 VDC Charge @ 50% load and 13.6 VDC Float @ 0.5 amp load
• Flooded/AGM: 14.2 VDC Charge @ 50% load and 13.4 VDC Float @ 0.5 amp load

Compliance and Certifications

• USCG CFR 183.410: Ignition protected (CG)
• CE Mark: Complies with European standards
• ABS Certifications: Meets 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

Available Options

• Remote Panel (Model RP): Compatible with all models except PT-7 and PT-40U. Features LED indicators for charger output stages and manual re-initialization of the three-stage charge cycle. Comes with 25′ of cable. Panel dimensions: 3″ H x 4.75″ W.
• Temperature Compensation Sensor (Model TCS 12/24): Compatible with all models except PT-7. Adjusts output voltage based on temperature (-5 mV per cell per degree Celsius) with a 25′ cable (40′ optional).

Additional Specifications

• Charger Input Voltage: 115/230V
• Charger Output: 25A at 12V
• Charging Banks: 3
• Inverter Input Voltage: 115/230V
• Inverter Output Voltage: 12V
• Outlet Quantity: Hardwire
• Portable: No
• Box Dimensions: 10"H x 10"W x 16"L
• Weight: 9.5 lbs

Download the Owner's Manual (PDF)

Note: This product cannot be returned to the original point of purchase. For any issues or concerns, please contact the manufacturer directly.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.