Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Topology: DC-DC Step-Up Boost
- Input Voltage: 10V - 18V DC
- Output Profile: 43.8V 13A CC/CV
- Protection: IP67 Fully Potted
Heavy Marine Product Catalog
Specialized Marine & Auxiliary Boat Battery Chargers
Engineered to handle harsh salinity, severe voltage sags, and deep freeze temperatures with IP65+ ingress encapsulation, multi-stage CC/CV profiling, and active thermal protection.
600W AC-DC Waterproof LiFePO4 Charger
- AC Input: 90V - 264V Universal
- Voltage Config: 14.6V, 29.2V, 58.4V
- Chassis: Die-Cast Aluminum
- Efficiency: ≥ 93.5% Peak
Multi-Volt 600W Commercial Vessel Charger
- Compatibility: 12V/24V/36V/48V Banks
- Chemistry: LiFePO4 & Ternary Li
- Thermal Range: -35°C to +75°C
- Compliance: CE, RoHS, ISO 9001
300W Marine Compact Dockside Lithium Charger
- Shore Interface: Industrial Plug Adapters
- Output Current: 10A / 20A Adaptive
- Potting: Anti-Corrosive Polyurethane
- Cooling: Fanless Natural Convection
400W DC-DC House Bank Isolator Charger
- Source Voltage: 10V - 36V Alternator/Starter
- Target Voltage: 14.6V / 29.2V Profiled
- Isolation: Dual Battery Bank Protection
- Integration: Engine Run-Signal Sensing
1500W Programmable Buck-Boost Marine Stabilizer
- Wide Input: 10V - 60V Continuous
- Regulated Output: 12V, 24V, 28V, 48V Stable
- Interface: MODBUS RS485 Telemetry
- Surge Rating: TVSS 4000W Spike Suppression
18-90V Galvanic Isolated Marine Converter
- Isolation Rating: 1500V DC Opto-Coupled
- Noise Filtering: Zero Ground-Loop Noise
- Application: Navigational Sonar & Radios
- Input Spread: Ultra-Wide 18V - 90V DC
24V to 12V 100A Heavy Duty Marine Step-Down
- Max Output Current: 100 Amperes Continuous
- Rated Power: 1200 Watts Clean DC
- Casing: Extruded Anodized Alloy
- Efficiency: 96% Low-Thermal Loss
ISO9001
Certified Quality Assurance
500+
Active Standard Power Models
130+
Export Delivery Destinations
≥ 95%
Peak Conversion Efficiency
Engineering Whitepaper: Marine Battery Charging in Cold-Water & Saline Environments
Maritime navigation across regional waters—including coastal commercial operations spanning the West Sea (Yellow Sea) and East Sea (Sea of Japan)—imposes rigorous operational hurdles on vessel power conversion hardware. Sub-zero winters, persistent fog, abrasive sea spray, and volatile engine alternator RPM require power architectures built for survival. As an experienced manufacturer, Eltrum supplies specialized boat battery charging systems configured specifically to withstand high-vibration engine compartments and volatile marine line noise.
Coastal Fishing & Trawler Fleets
Trawlers navigating the Korea Bay and offshore fishing grounds rely on heavy-duty diesel engines where main alternators fluctuate between 11.2V at idle and 15.6V under load. Our DC-DC battery chargers stabilize irregular alternator currents, delivering a tightly regulated CC/CV multi-stage profile directly to auxiliary electronics, sonar packs, and communication house batteries.
Inland River & Estuary Transport
Navigating shallow-draft cargo vessels across major riverways like the Taedong River demands uninterrupted battery bank stability for engine starter batteries and nocturnal searchlights. Our IP67 potted buck-boost stabilizers and chargers prevent electrical brownouts caused by sudden bilge pump and winch activations.
Sub-Zero Winter Cold Starts
Regional maritime operations often encounter severe freezing weather where ambient engine compartment temperatures drop below -25°C. Conventional consumer battery chargers fail to strike high internal resistance cells. Eltrum chargers feature integrated low-temperature cutoff thresholds and thermal-compensated voltage curves to protect LiFePO4 cathode lattices from lithium-plating dendrite failures.
Technological Evolution & Regional Marine Power Trends
Historically, heavy maritime operators in the regional East Asian waters relied extensively on flooded lead-acid and heavy AGM battery banks. While lead-acid tolerates basic charging methodologies, it suffers from severe sulfation, high weight-to-energy ratios, and abbreviated lifespan under deep discharge cycles common during prolonged port loading or offshore anchoring without shore power.
Today, maritime retrofit initiatives and modern fleet modernization programs are driving substantial shifts toward Lithium Iron Phosphate (LiFePO4) and advanced ternary battery topologies. This transition creates specific technical imperatives:
Alternator Thermal Safeguards
LiFePO4 banks exhibit near-zero internal resistance, pulling massive amperage directly from standard marine alternators. Without intermediate DC-to-DC regulation, alternators overheat and burn their stator windings at low trolling speeds. Eltrum chargers enforce precise current limits, safeguarding the vessel's primary power generation gear.
Galvanic Ground Loop Interruption
Commercial hulls operating in saline sea water suffer rapid galvanic corrosion if battery return currents leak into the hull plating. Our isolated DC-DC chargers decouple input and output negative returns via high-frequency planar transformers, completely isolating critical communication instruments from the starter battery ground.
Rugged Solid-State Potting
Salt fog and high engine vibrations destroy air-cooled chargers with exposed cooling fans within months. Eltrum's marine chargers utilize thermally conductive polyurethane resin encapsulation, achieving true hermetic sealing that resists humidity, salt deposition, hydraulic fuel spray, and continuous mechanical shock.
Manufacturing Authority: Shenzhen Eltrum Electronic Co., Ltd.
Founded in 2015, Shenzhen Eltrum Electronic Co., Ltd. is a dedicated designer and high-volume manufacturer of DC-DC converters, isolated power modules, buck-boost voltage regulators, and high-efficiency LiFePO4 battery charging platforms. Our manufacturing hub spans up to 3,000 m² equipped with automated SMT assembly lines, computerized wave soldering, dynamic burn-in testing chambers, and precision polyurethane potting machinery.
Every single power unit undergoes rigorous 100% full-load burn-in screening, high-potential dielectric breakdown tests, and temperature-cycle stress validation before packaging. Our team delivers comprehensive OEM and ODM engineering support, adapting charging curves, communication protocols (RS485 / CANbus), custom connectors, and structural heat-dissipating casings to fulfill precise commercial vessel specifications.
With an onsite-verified production facility certified under ISO 9001 and international conformity across CE and RoHS benchmarks, Eltrum supplies reliable power modules across more than 130 countries worldwide, offering engineering-first guidance from prototype validation to volume delivery.
Procurement FAQ: Sourcing Marine Battery Chargers
How does a DC-DC marine charger protect the main engine alternator compared to a standard mechanical isolator or relay?
Mechanical split-charge relays (VSRs) directly parallel the starting battery and house battery when the alternator fires. If a large LiFePO4 house bank is depleted, its near-zero internal resistance draws maximum current from the alternator regardless of engine RPM. At idle or trolling speeds, the alternator's internal fan spins slowly, resulting in rapid thermal breakdown and burned stator coils. An Eltrum DC-DC charger electronically throttles and conditions current draw to a safe, constant maximum, while synthesizing an exact 3-stage (Constant Current, Constant Voltage, Float) curve tuned specifically for lithium or AGM banks.
What ingress protection level is recommended for marine vessel engine bays and deck lockers?
We strongly advise selecting chargers rated at minimum IP65, with IP67 preferred for open bilge areas, fishing deck lockers, and humid machinery rooms. In coastal and estuarine waterways, airborne salt aerosols combine with diesel soot to create an electrically conductive, highly corrosive film on standard vented circuit boards. Eltrum's fully potted aluminum modules eliminate air pockets, preventing moisture ingress, corrosion, and contact oxidization entirely.
Can your DC-DC chargers accept wide voltage fluctuations from auxiliary marine solar panels and wind turbines?
Yes. Our wide-input buck-boost models (such as our 8-40V, 10-60V, and 18-90V platforms) function as multi-source DC conditioners. If your input voltage drops below the battery charging voltage (such as during heavy overcast on a solar array or when cranking the starter motor), the internal boost stage steps up the voltage. Conversely, if high RPM or solar spikes cause an over-voltage surge, the buck stage steps down the voltage to ensure an uncompromised 14.6V, 29.2V, or 43.8V profile.
What are the standard order quantities (MOQ) and production lead times for customized voltages?
For standard catalog items across our DC-DC and AC-DC marine charger lines, sample orders start from just 5 units to allow engineering review and dockside testing. For OEM/ODM custom output calibrations, special multi-wire harnesses, or branded laser labeling, batch runs typically begin at 50 to 100 units with engineering prototypes delivered within 7 to 12 working days.
How does Eltrum maintain reliable galvanic isolation on vessels with steel or aluminum hulls?
Our isolated DC-DC converter series utilize planar high-frequency isolation transformers providing 1500V DC dielectric isolation between the input negative (engine chassis/starting system) and output negative (house distribution bus). This breaks unintended ground loops, preventing stray DC current leakage that would otherwise accelerate electrolytic corrosion of the vessel hull and rudder running gear.
Request a Technical Consultation or Custom Quote
Speak directly with our power engineering team regarding custom input ranges, marine certifications, and volume batch delivery.