Newmar 115-24-18CD Power Supply | Best + Worst Uses
Introduction
The Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont for Boats & Marine Engines is a high-performance AC-to-DC converter engineered for demanding marine applications. Designed to convert 115/230VAC shore or generator power into a continuous 24VDC output at 18 Amps, this unit provides consistent, clean, and safe power for critical onboard systems such as GPS units, engine monitoring systems, lighting, pumps, and radios. Built with rugged marine-grade construction, it thrives in challenging marine environments, offering durability, reliability, and peace of mind for vessel owners, captains, and technicians alike.
This unit is particularly suitable for medium-to-large boats and commercial vessels requiring higher DC load capacity. Its convection-cooled, noiseless operation and built-in safety protections make it a valuable part of any marine electrical system upgrade or new build.
Overview / What Is Newmar 115-24-18CD Power Supply
The Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont is a commercial-grade regulated power converter that bridges the gap between alternating current (AC) power sources and direct current (DC) electrical loads aboard boats and marine engines. Ideal for electronics, lighting, control panels, and other DC systems, this unit ensures optimal performance of marine electronics by delivering precise voltage under varying loads.
Equipped with dual AC input compatibility (115V or 230V), this device is globally ready. Its convection cooling design eliminates the need for noisy fans, while multiple safety features—such as overload protection, thermal shutdown, and short-circuit prevention—make it a low-maintenance and long-lasting solution.
Core Features & Benefits of Newmar 115-24-18CD Power Supply
- Input Voltage: 115/230VAC, 50-60Hz
- Output Voltage: Regulated 24VDC ±1%
- Current Rating: 18 Amps continuous duty
- Cooling: Convection cooled, silent operation
- Design: Rugged marine-grade aluminum enclosure
- Protections: Over-voltage, short-circuit, thermal shutdown
- Mounting: Bulkhead or shelf-mounted for versatile installs
This power supply offers a stable and regulated voltage output, which is essential for sensitive marine electronics. Its robust construction ensures that it can endure vibration, salt air, humidity, and heat, all common factors in marine settings.
How to Install Newmar 115-24-18CD Power Supply
Correct installation of the Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont enhances safety, reliability, and system longevity. Begin by choosing a clean, dry, and well-ventilated area onboard—preferably away from engine compartments or wet lockers. Use stainless steel hardware to mount the unit securely on a bulkhead or shelf.
Run marine-grade, tinned copper wires for both AC input and DC output. Always fuse the AC input line as well as each DC output circuit. Ground the chassis to prevent electrical interference with sensitive electronics such as GPS or sonar systems. For dual voltage input, confirm voltage selector switch is in the correct position before powering the unit.
Top Applications for Newmar 115-24-18CD in Marine Vessels
The Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont serves multiple onboard systems. It is an excellent fit for:
- Navigation electronics such as radar, GPS, and AIS transceivers
- Engine monitoring and diagnostic systems
- Cabin and deck lighting circuits
- Battery maintenance and charging applications
- Communication systems (VHF/UHF radios)
This wide range of applications makes it an essential tool for professional operators, coast guards, charter fleets, and serious cruisers. Its ability to deliver steady power under full load conditions makes it ideal for mission-critical uses.
Maintenance Tips
To maximize the lifespan of your Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont, follow a routine maintenance schedule. Even though it’s a low-maintenance product, preventive care can extend its efficiency and prevent unexpected downtime.
Maintenance Checklist:
- Inspect all terminal connections every 3-6 months for corrosion or looseness
- Clean the outer casing monthly with a dry microfiber cloth
- Check ventilation and remove dust/debris blocking air flow
- Test the DC output with a multimeter every 6 months to verify voltage accuracy
Important: Always disconnect shore power before opening any panels or performing electrical work on your vessel.
Expert Advice and Pro Recommendations
Marine electricians and system integrators consistently recommend the Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont for medium-to-large vessels with moderate-to-high DC demand. It’s particularly suitable for sailboats, trawlers, patrol boats, and liveaboard yachts that operate advanced electronics and lighting systems full time.
Professionals suggest placing the unit inside a protective box if mounted near engine compartments or salt-prone areas. Use inline fuses on each DC circuit to prevent system-wide failure during shorts. Test the power supply under load during annual vessel checks for best results.
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Detailed FAQ Section
What is the typical lifespan of the Newmar 115-24-18CD Power Supply?
The unit is designed for marine longevity. With proper care, it can last over a decade. Marine-grade materials, a rugged enclosure, and lack of moving parts make it extremely durable. Avoid overloading and install in a ventilated space to extend lifespan. Occasional output testing and corrosion checks further ensure longevity.
How do I troubleshoot issues with the Newmar 115-24-18CD Power Supply?
First, check the AC input voltage and ensure the fuse is intact. If there’s no DC output, verify terminal connections and the input voltage selector. Overheating? Check for blocked airflow or ambient temperature excess. Inconsistent output voltage could indicate overload or corroded terminals. If problems persist, consult a marine technician or contact Newmar support for diagnostics.
Is the Newmar 115-24-18CD Power Supply safe for sensitive electronics?
Yes. It provides a stable 24VDC output with tight regulation and low noise. Sensitive electronics such as sonar systems, communication radios, and navigation processors run reliably without electrical interference. Over-voltage and short-circuit protections make it suitable for delicate onboard systems that require constant, reliable DC power.
Can I use this unit internationally?
Absolutely. The dual-input design (115/230VAC) means it can be used worldwide. Whether you’re docked in North America, Europe, or Southeast Asia, this unit will adapt. Just ensure you correctly set the voltage selector switch and use appropriate AC cords and plugs. This makes it ideal for globetrotting yachts and internationally operating workboats.
How much continuous load can the power supply handle?
The power supply delivers 18 Amps continuous at 24VDC. That translates to 432 Watts of continuous power. It is not recommended to exceed this load. Plan your onboard systems accordingly. Use a DC load calculator and consider surge ratings when connecting motors or pumps to ensure optimal load distribution.
Conclusion
The Newmar 115-24-18CD Power Supply 115/230VAC To 24VDC @ 18A Cont for Boats & Marine Engines is the gold standard for marine-grade power conversion. Whether you’re outfitting a commercial vessel or upgrading a private yacht, this power supply delivers the durability, safety, and precision your systems demand. With low-noise operation, exceptional output regulation, and built-in protections, it’s a smart long-term investment for any serious mariner.
For more information on compatible systems and accessories, visit Yamaha Outboards.
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