Newmar PT-24-45U Battery Charger

The PT-24-45U Battery Charger is engineered specifically for 24-volt marine systems, ensuring reliable performance for workboats, military and commercial vessels, as well as recreational boats. Utilizing advanced "smart" charging technology, this charger optimizes battery health by delivering a precise three-stage charge process that enhances recovery, conditions the batteries, and extends their lifespan.

Advanced Charging Technology

Equipped with intelligent circuitry, the PT-24-45U provides a comprehensive charging cycle that includes bulk, absorption, and float stages. This ensures rapid battery recovery while maintaining optimal performance and longevity. The charger intelligently interacts with various battery types to deliver the most effective charging solution.

Versatile Battery Compatibility

Adaptable to different battery technologies, the PT-24-45U features a selector switch that allows you to choose between gel-cell, flooded lead-acid, or AGM batteries. This flexibility ensures that your specific battery type receives the appropriate voltage and charging regimen for maximum efficiency.

Temperature Compensation

Maintain optimal charging conditions with the optional temperature compensation sensor. This feature adjusts the output voltage in response to ambient temperature changes, ensuring that your batteries are charged correctly regardless of environmental conditions.

Durable and Corrosion-Resistant Construction

Built to withstand the harsh marine environment, the charger is housed in a rugged stainless steel case with a durable white powder coat finish. The internal circuitry is polyurethane coated, providing superior corrosion resistance and longevity even in demanding conditions.

Key Features

• 24-volt charging for robust marine applications
• Smart three-stage charging: bulk, absorption, float
• Selectable charging modes for Gel-Cell, Flooded Lead-acid, and AGM batteries
• Multiple isolated output banks with ammeter for total output current monitoring
• Optional temperature compensation for precise voltage regulation
• Built-in current limiting to prevent overload damage
• Capable of powering loads independently of the battery
• Rugged stainless steel enclosure with optional drip shield and marinized circuitry
• Comprehensive protection features: Current Limiting, Thermal Protection, Forced Air Cooling, Drip Shield
• Expandable with PT-MCU for enhanced control and monitoring
• ABS-approved for safe battery charging and power supply

Technical Specifications

Parameter	Specification
Input Voltage (VAC)	90 – 264 VAC (50-60 Hz)
Input Current @ 115 VAC	12 A
Input Current @ 230 VAC	7 A
Power Factor	0.98 @ 115V, 0.95 @ 230V
Maximum Output Current	45 A
Number of Output Banks	3
Battery Capacity Range	90 – 450 Amp-Hours
Operating Temperature	-20°C to +70°C
Case Dimensions (H x W x D)	14.8” x 9.6” x 5.6” (37.6 cm x 24.4 cm x 14.2 cm) *With Dripshield: +1” Height, +0.5” Depth
Weight	12 lbs / 6 kg
Optional Temperature Sensor Models	TCS-12/24
Remote Panel Model	RP
Compliance Certifications	EN, CE, ABS

Temperature Performance

• Operating Range: -20°C to +70°C
• Derating: Linearly reduces from 100% capacity at 50°C to 50% at 70°C

Charging Voltage Specifications

Battery Type	Charge Voltage (VDC) @ 50% Load	Float Voltage (VDC) @ 0.5 A Load
Gel-Cell	28.0	27.2
Flooded/AGM	28.4	26.8

Compliance and Safety Standards

• UL: UL 1950 (per DNV report)
• USCG: CFR 183.410 (Ignition Protected)
• EN: EN 60335-1
• CE: CE Mark Certified
• ABS: 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

Optional Accessories

Remote Panel (Model RP): Enhance your charging setup with the remote panel, compatible with all models except PT-24-20U, PT-24-60, and PT-32-25. The panel features LED indicators for charge stages and allows manual re-initialization of the three-stage charging cycle. Includes 25 feet of cable and measures 3″ H x 4.75″ W.

Additional Specifications

• Charger Input Voltage: 115/230 V
• Charger Output Current: 45 A
• Charger Output Voltage: 24 V
• Number of Charging Banks: 3
• Inverter Input Voltage: 115/230 V
• Inverter Output Voltage: 24 V
• Outlet Type: Hardwired
• Portability: Non-Portable
• Box Dimensions: 10” H x 14” W x 20” L
• Weight: 18 lbs

Support and Documentation

For detailed guidance, refer to the following resources:

• Quick Guide (PDF)
• Owner's Manual (PDF)

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

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.