Electrical - DC to DC Converters
Marine DC to DC converters are designed to provide stable, efficient voltage conversion and dependable power management for your vessel's electrical system. Engineered for demanding freshwater and saltwater environments, these marine-grade converters safely step up, step down, or regulate DC voltage to ensure onboard electronics and accessories receive the correct power supply. From isolated and non-isolated converters to DC-to-DC battery chargers and voltage regulators, these solutions support multiple battery banks, alternator charging systems, lithium battery installations, navigation electronics, communication equipment, lighting, and other onboard devices. Built with advanced protection against overload, overheating, short circuits, and voltage fluctuations, marine DC to DC converters help improve battery charging efficiency while protecting sensitive electronics. Whether you're upgrading your boat's electrical system or adding new equipment, the right converter delivers reliable performance and long-term efficiency. Featuring premium products from trusted marine brands such as Victron Energy, Mastervolt, and Newmar, our Electrical – DC to DC Converters collection offers the quality and reliability serious boaters expect. Browse our selection today and let our knowledgeable team help you choose the ideal solution for your vessel.
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- Featured
- Most relevant
- Best selling
- Alphabetically, A-Z
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Vendor:Victron Energy
Victron Orion-TR DC-DC Converter - 48 VDC to 12 VDC - 30AMP Isolated [ORI481240110]
- $201.45
$237.00- $201.45
- Unit price
- / per
Orion-TR 48/12-30A (360W) Isolated DC-DC ConverterIsolated Model - separate in and out (-) leads Remote On/Off TerminalThe remote on/off terminal eliminates the need for a high current switch in the input wiring. The remote on/off can be operated with a low power switch or for...- $201.45
$237.00- $201.45
- Unit price
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Vendor:Victron Energy
Victron Orion 24/12-60 DC-DC Converter IP20 [ORI241260020]
- $96.05
$113.00- $96.05
- Unit price
- / per
Orion 24/12-60 DC-DC Converter IP20Remote on/off connectorThe remote on/off eliminates the need for a high-current switch in the input wiring. The remote on-off can be operated with a low-power switch or by the engine run/stop switch (see manual).All models with adjustable output can also...- $96.05
$113.00- $96.05
- Unit price
- / per
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Vendor:Newmar Power
Newmar 32-12-25 DC Converter [32-12-25]
- $768.99
$1,020.00- $768.99
- Unit price
- / per
32-12-25 DC ConverterConvert 20-50 VDC input to 12 VDC negative ground output for powering communication and navigation equipment on negative ground systems. (See Isolated Series for positive ground applications.)Features: Excellent Regulation: Output voltage maintained within 1% under all line and load conditions within rating...- $768.99
$1,020.00- $768.99
- Unit price
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Vendor:Victron Energy
Victron Energy Orion-TR Smart 12/12-30 30A (360W) Non-Isolated DC-DC or Power Supply [ORI121236140]
- $215.05
$253.00- $215.05
- Unit price
- / per
Orion-TR Smart 12/12-30 30A (360W) Non-Isolated DC-DC or Power SupplyThe Orion-Tr Smart DC-DC charger is a professional DC to DC adaptive 3-stage charger with built-in Bluetooth.For use in dual battery systems in vehicles or on boats where the alternator and the start battery are...- $215.05
$253.00- $215.05
- Unit price
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Vendor:Victron Energy
Victron Orion-TR Smart 12/12-30 30A (360W) Isolated DC-DC or Power Supply [ORI121236120]
- $243.95
$287.00- $243.95
- Unit price
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Orion-TR Smart 12/12-30A (360W) Isolated DC-DC Charger or Power SupplyThe Orion-Tr Smart isolated DC-DC charger serves as a DC-DC battery charger or a power supply (also designed for use as a constant voltage source), offering a wide input and output voltage range. This is...- $243.95
$287.00- $243.95
- Unit price
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Vendor:Samlex America
Samlex 30A Non-Isolated Step-Down 24VDC-12VDC Converter [SDC-30]
- $173.70
$217.20- $173.70
- Unit price
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30A Non-Isolated Step-Down 24VDC-12VDC ConverterThis high efficiency switch-mode step-down DC-DC converter converts an input voltage of 24 VDC nominal (range 20 VDC to 32 VDC) to a highly regulated output voltage of 12 VDC nominal (13.8 VDC) at 30 Amps. The SDC-30 DC-DC converter...- $173.70
$217.20- $173.70
- Unit price
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Vendor:Victron Energy
Victron Orion XS 1400 DC-DC Battery Charger [ORI242417040]
- $356.15
$419.00- $356.15
- Unit price
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Orion XS 1400 DC-DC Battery ChargerThe Orion XS has been engineered from the ground up to redefine DC-DC, battery-to-battery charging. Ideal for dual-battery setups connected to an intelligent alternator, it ensures top-tier performance and optimal system safety in 12V, 24V, or mixed-voltage systems.Using engine...- $356.15
$419.00- $356.15
- Unit price
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Vendor:Victron Energy
Victron Orion-Tr Smart DC-DC Charger Isolated 48/12 20A (240W) [ORI481224120]
- $159.80
$188.00- $159.80
- Unit price
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Orion-Tr Smart DC-DC Charger Isolated 48/12 20A (240W)The Orion-Tr Smart DC-DC charger is an adaptive 3-stage charger (bulk – absorption – float) designed for dual-battery systems, such as in vehicles or on boats, where the starter battery (hence the alternator) is used to charge...- $159.80
$188.00- $159.80
- Unit price
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Vendor:Victron Energy
Victron Orion 24/12-80 DC-DC Converter IP20 [ORI241280020]
- $114.75
$135.00- $114.75
- Unit price
- / per
Orion 24/12-80 DC-DC Converter IP20Remote on/off connectorThe remote on/off eliminates the need for a high-current switch in the input wiring. The remote on-off can be operated with a low-power switch or by the engine run/stop switch (see manual).All models with adjustable output can also...- $114.75
$135.00- $114.75
- Unit price
- / per
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Vendor:Dolphin Charger
Dolphin Charger DC-DC Converter - 24/24V - 30A [99202]
- $915.99
$1,274.00- $915.99
- Unit price
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DC-DC Converter - 24/24V - 30AYour boat has a 12V alternator, and you need to charge a 24V or 36V battery “on the run”? Dolphin has the solution. Our boosters are true DC/DC chargers with a 3-stage smart charge feature. Compatible with 4 different...- $915.99
$1,274.00- $915.99
- Unit price
- / per
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Vendor:Dolphin Charger
Dolphin Charger DC-DC Converter - 24/48V - 15A [99203]
- $1,159.99
$1,613.00- $1,159.99
- Unit price
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DC-DC Converter - 24/48V - 15AYour boat has a 12V alternator, and you need to charge a 24V or 36V battery “on the run”? Dolphin has the solution. Our boosters are true DC/DC chargers with a 3-stage smart charge feature. Compatible with 4 different...- $1,159.99
$1,613.00- $1,159.99
- Unit price
- / per
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Vendor:Dolphin Charger
Dolphin Charger DC-DC Converter - 12/24V - 30A [99201]
- $697.99
$970.00- $697.99
- Unit price
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DC-DC Converter - 12/24V - 30AYour boat has a 12V alternator, and you need to charge a 24V or 36V battery “on the run”? Dolphin has the solution. Our boosters are true DC/DC chargers with a 3-stage smart charge feature. Compatible with 4 different...- $697.99
$970.00- $697.99
- Unit price
- / per
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Vendor:Victron Energy
Victron Orion IP67 24/12-10A (120W) [ORI241210260]
- $45.05
$53.00- $45.05
- Unit price
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Orion IP67 24/12-10A (120W)Completely encapsulated: waterproof, shockproof, and ignition protected. Water, oil, or dirt will not damage the Orion IP67 DC-DC Converter. The casing is made of cast aluminum and the electronics are molded in resin. Owner's Manual (pdf)- $45.05
$53.00- $45.05
- Unit price
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Vendor:Victron Energy
Victron Orion 24/12-30 DC-DC Converter IP20 [ORI241230022]
- $76.50
$90.00- $76.50
- Unit price
- / per
Orion 24/12-30 DC-DC Converter IP20Remote on/off connectorThe remote on/off eliminates the need for a high-current switch in the input wiring. The remote on-off can be operated with a low-power switch or by the engine run/stop switch (see manual).All models with adjustable output can also...- $76.50
$90.00- $76.50
- Unit price
- / per
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Vendor:Newmar Power
Newmar 24-12-3 DC Converter [24-12-3]
- $181.99
$235.00- $181.99
- Unit price
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24-12-3 DC ConverterConvert 17-32 VDC input to 12 VDC negative ground output for powering communication and navigation equipment on negative ground systems. (See Isolated Series for positive ground applications.)Features: Excellent Regulation: Output voltage maintained within 1% under all line and load conditions within the...- $181.99
$235.00- $181.99
- Unit price
- / per
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Vendor:Victron Energy
Victron Autotransformer 120/240 VAC 50A [ITR000100052]
- $451.35
$531.00- $451.35
- Unit price
- / per
Autotransformer 120/240 VAC 50AAn Autotransformer can be used for step-up, step-down, and split-phase output balancing purposes. While the step-up and step-down functions are fairly straightforward, split-phase output balancing may require some more attention.Please contact your dealer for any returns, repairs or support issues related...- $451.35
$531.00- $451.35
- Unit price
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Vendor:Samlex America
Samlex 12A Non-Isolated Step-Down 24VDC-12VDC Converter - Heavy Duty Applications [SDC-15]
- $108.70
$135.90- $108.70
- Unit price
- / per
12A Non-Isolated Step-Down 24VDC-12VDC Converter - Heavy Duty ApplicationsThis high efficiency switch-mode step-down DC-DC converter converts an input voltage of 24 VDC nominal (range 20 VDC to 35 VDC) to a highly regulated output voltage of 12 VDC nominal (13.8 VDC) at 12 Amps....- $108.70
$135.90- $108.70
- Unit price
- / per
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Vendor:Mastervolt
Mastervolt Mac Plus 24/24-30 + CZone [81205405]
- $522.99
$709.99- $522.99
- Unit price
- / per
Mac Plus 24/24-30 + CZoneBoost the Service BatteryToo often, service batteries don’t get the charge they need. This is a problem made worse by smart alternators and start/stop systems, which result in slow and insufficient charges. The Mac Plus DC-DC charger solves this problem,...- $522.99
$709.99- $522.99
- Unit price
- / per
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Vendor:Samlex America
Samlex 100W Fully Isolated DC-DC Converter - 8A - 30-60V Input - 12.5V Output [IDC-100C-12]
- $178.80
$223.40- $178.80
- Unit price
- / per
100W Fully Isolated DC-DC Converter - 8A - 30-60V Input - 12.5V OutputIDC-100 series is a complete line of high efficiency 100 Watt isolated DC-DC converters suitable for applications requiring galvanic isolation between the input and the output. IDC-100C-12 isolated DC-DC converter provides a...- $178.80
$223.40- $178.80
- Unit price
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Vendor:Victron Energy
Victron Orion-TR Isolated DC-DC Converter - 24 VDC to 24 VDC - 400W - 17AMP [ORI242441110]
- $201.45
$237.00- $201.45
- Unit price
- / per
Orion-TR 24/24-17A (400W) Isolated DC-DC ConverterIsolated Model - separate in and out (-) leads Remote On/Off TerminalThe remote on/off terminal eliminates the need for a high current switch in the input wiring. The remote on/off can be operated with a low power switch or for...- $201.45
$237.00- $201.45
- Unit price
- / per


![Victron Orion 24/12-60 DC-DC Converter IP20 [ORI241260020]](http://www.dbmarinesupplies.com/cdn/shop/files/112825XL_533x.jpg?v=1771010170)
![Victron Orion XS 1400 DC-DC Battery Charger [ORI242417040]](http://www.dbmarinesupplies.com/cdn/shop/files/108424XL_533x.jpg?v=1747096393)
![Victron Autotransformer 120/240 VAC 50A [ITR000100052]](http://www.dbmarinesupplies.com/cdn/shop/files/112828XL_533x.jpg?v=1770684990)
![Mastervolt Mac Plus 24/24-30 + CZone [81205405]](http://www.dbmarinesupplies.com/cdn/shop/files/102662XL_533x.jpg?v=1705359752)
![Victron Orion-TR Isolated DC-DC Converter - 24 VDC to 24 VDC - 400W - 17AMP [ORI242441110]](http://www.dbmarinesupplies.com/cdn/shop/files/92890XL_533x.jpg?v=1704935081)