Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Input Voltage12V DC (Alternator/Starter)
- Output Charging43.8V CC/CV (36V LiFePO4)
- Rated Current13A Max
- EnclosureIP67 Aluminum Alloy
Precision Conversion Portfolio
Standard & Custom DC-DC Battery Chargers & Regulators
Engineered for high thermal tolerance, low quiescent discharge, and adaptive Multi-Stage CC/CV profiles matching LiFePO4, Ternary Lithium, and AGM chemistries.
400W Waterproof DC-DC Dual RV Battery Charger
- Input Window10V–36V DC Step-Up/Down
- Output Range14.6V / 29.2V / 43.8V
- Power Density400W High Efficiency
- Cooling TopologyIntegrated Natural Convection
1500W High-Power Buck-Boost DC Stabilizer
- Wide Input Range10V–60V Universal DC
- Output Rail12V / 24V / 28V / 48V
- TelemetryRS485 Protocol Monitoring
- EfficiencyPeak 96.5% Synchronous
18–90V to 12V 10A Galvanic Isolated Converter
- Ultra-Wide Input18V–90V DC Traction Rail
- Regulated Output12V Stabilized 10A (120W)
- Isolation Barrier1500V DC Break Ground Loop
- ProtectionOVP, OCP, OTP, Reverse Polarity
24V to 12V 85A/100A High-Current Step Down
- Nominal Input24V Bus (18V–32V Operational)
- Output Delivery12V DC Continuous 100A Max
- Form FactorExtruded Thermal Heatsink
- Ideal ForPort Harbor Cranes & Marine
12V to 24V / 48V High-Current Boost Module
- Primary Supply9V–16V DC Low Rail
- Step-Up Output24V 50A or 48V 20A Config
- Potted ProtectionResin Fully Encapsulated
- ApplicationBow Thrusters & Commercial Winches
30–90V Traction Pack to 24V Step-Down Module
- Battery Input36V / 48V / 60V / 72V Nominal
- Auxiliary Rail24V Regulated 20A Peak
- Thermal ShutdownAuto Recovery at +85°C
- DeploymentsYard Tractors, AGVs, Golf Buggies
8–40V to 13.8V 30A Clean Float Stabilizer
- Dynamic Range8V–40V DC (Anti-Cranking Sag)
- Float Voltage13.8V Radio / Navigation Grade
- Amperage Limit30A Sustained Output
- ImmunitySurge, Spike, & Load-Dump Free
Regional Technical Insight
Engineering Directives for DC-DC Power Conversion in Denmark
A comprehensive examination of how harsh Scandinavian maritime environments, smart alternators (Euro 6d/Euro 7), and green harbor initiatives determine conversion topology choices.
Procuring industrial-grade DC-DC battery chargers and converters for Aarhus and the broader Jutland industrial corridor requires navigating distinct electrical, structural, and climatic hurdles. As Denmark accelerates toward its aggressive carbon reduction goals, corporate fleets, maritime contractors operating at Aarhus Havn, and renewable power developers have abandoned primitive split-charge relays and linear droop regulators. The widespread implementation of regenerative braking systems and smart alternators in modern commercial utility vehicles has rendered unregulated battery-to-battery charging obsolete.
When an internal combustion or hybrid engine decelerates, modern ECU-controlled alternators spike system voltage upwards of 15.2V to recapture kinetic energy. Conversely, under cruising or thermal stress, alternator output frequently plunges below 12.2V. Connecting a low-impedance auxiliary lithium iron phosphate (LiFePO4) storage bank directly across these erratic buses triggers catastrophic alternator stator overheating or causes premature battery management system (BMS) over-voltage disconnects. Eltrum’s high-precision buck-boost topology DC-DC battery chargers resolve this fundamental instability by decoupling the starter rail completely, accepting unpredictable primary voltages from 8V to 90V while enforcing strict three-stage Constant Current / Constant Voltage (CC/CV) absorption algorithms tuned precisely to 14.6V, 29.2V, or 43.8V.
Furthermore, maritime logistics at the Port of Aarhus demand resilient galvanic isolation. Stray direct currents stemming from shared chassis grounds remain the primary catalyst for rapid electrolytic hull decay in Kattegat saltwater berths. By utilizing Eltrum isolated DC-DC modules with transformer barriers rating up to 1500V DC breakdown voltage, Danish naval architects and industrial electricians effectively eliminate ground loop ground shifts, preserving cathodic protection systems and shielding mission-critical marine radar, sonar, and programmable automation controllers from voltage transients.
500+
Active Power Models
96.5%
Peak Synch Efficiency
130+
Global Export Nations
5 Units
Direct OEM Sample MOQ
Field Deployments
Aarhus Industrial & Maritime Power Applications
Deployable engineering architectures custom-tailored to solve local power challenges across Midtjylland's primary commercial sectors.
Port of Aarhus Maritime Fleets
Tugboats, crew transfer vessels (CTVs) for offshore wind farms, and recreational yachts berthed at Aarhus Lystbådehavn encounter severe saline condensation. Our fully potted IP67/IP68 DC-DC battery chargers provide clean, moisture-proof galvanic separation between main cranking batteries and secondary house lithium banks, eliminating galvanic corrosion while sustaining electronics.
Mobile Workshops & Utility Fleet Electrification
Municipal vans, telecommunication maintenance vehicles, and overlanding utility conversions operating in cold Danish winters rely on dual-battery systems. Eltrum chargers feature programmable temperature compensation curves and smart ignition sense wiring, guaranteeing that secondary tool batteries charge at full 20A–50A capacity without drawing down starting banks below freezing.
Off-Grid Wind & Solar Remote Automation
Throughout Central Denmark Region wind testing zones and hybrid microgrids, battery bus voltages shift wildly under intermittent charge cycles. Our 10V–60V wide-input buck-boost converters continuously deliver stabilized 12V or 24V output rails to remote SCADA units, weather lidar, and telemetry transmitters, completely immune to source fluctuation.
Yard Tractors & Automated Guided Vehicles (AGV)
Distribution centers around Hasselager and Skejby use 48V, 60V, or 72V traction battery packs. Supplying 12V automotive-grade sensors, barcode scanners, and emergency steering systems requires high-efficiency step-down converters with over-current safety envelopes and anti-arcing ceramic input filters designed for 24/7 continuous warehouse operations.
Precision Factory Automation Systems
Advanced manufacturing facilities in the Jutland industrial zone require clean DC rails free from high-frequency switching hash generated by nearby heavy variable-frequency drives (VFDs). Our isolated converter line delivers low output ripple (<50mV p-p) and compliance with strict European EN 61000-6-2 electromagnetic immunity regulations.
5G Edge Repeaters & Harbor Infrastructure
Critical telecommunication nodes installed near docklands run on -48V DC standards. Our 36V–75V isolated DC conversion blocks offer robust reverse polarity protection and thermal overload foldback, guaranteeing uninterruptible operation for remote data logging hubs exposed to the elements year-round.
Market Outlook
Emerging Energy Storage Trends across Jutland
Key technical shifts dictating low-voltage DC system architectures over the next decade.
Transition to Sodium-Ion & LiFePO4 Chemistry
Nordic winters severely degrade classic ternary lithium cells. Danish fleets are accelerating the adoption of specialized cold-resilient LiFePO4 and emerging Sodium-Ion (Na-Ion) packs. Chargers must integrate low-temperature charging lockout routines and reconfigurable CC/CV cut-off profiles to preserve battery health during sub-zero operation.
Mandatory Smart Bus Communications
Closed, unmonitored power supplies are quickly disappearing from commercial specifications. Marine systems and utility vehicles across Aarhus increasingly specify native RS485 Modbus RTU or CAN bus telemetry. Engineering real-time current, temperature, and operating status streams into central vehicle telematics has become essential for proactive maintenance.
Total Component Sealing (IP67/IP68 Standard)
Unpotted circuit boards with traditional cooling fans consistently fail in coastal marine climates due to salt mist corrosion. The market has definitively shifted toward vacuum-encapsulated thermally conductive polyurethane resin potting, enabling silent, fanless operation inside harsh maritime environments and engine bays.
Why Danish Procurement Directs Trust Eltrum
Direct Shenzhen Manufacturing Authority
Founded in 2015, Shenzhen Eltrum Electronic Co., Ltd. operates a modern 3,000 m² high-precision power conversion factory in Hangcheng Street, Shenzhen. Employing a seasoned engineering team, we bridge the gap between flexible prototype validation and dependable high-volume production.
Unlike trading intermediaries, Eltrum controls the entire manufacturing chain from bare PCB surface-mount technology (SMT) and magnetic transformer winding to thermal resin potting, multi-stage automated load testing, and comprehensive thermal burn-in under maximum current loads.
We routinely supply distributors, system integrators, and OEM manufacturers across Denmark and more than 130 countries worldwide. Whether you need buyer-label packaging, customized CC/CV voltages, specialized IP68 marine enclosures, or integrated RS485 communication protocols, our team delivers custom-tailored samples starting at an accessible minimum order quantity of just 5 units.
Procurement FAQ
Frequently Asked Questions by Danish Buyers
Essential guidance on minimum order quantities, CE/RoHS conformity, topology selection, and direct factory shipping logistics to Aarhus.
What is the MOQ for Danish distributors and OEMs testing sample units?
Standard DC-DC battery chargers, buck-boost converters, and isolated power modules are available with a sample minimum order quantity starting from just 5 units. This allows engineering and purchasing teams in Aarhus and surrounding areas to conduct complete bench validation, dynamometer alternator trials, and vessel integration testing before placing large container orders. High-power units (1500W+) can be sampled from 1–2 units.
Do Eltrum chargers carry full CE, RoHS, and EU electromagnetic compatibility compliance?
Yes. Every power series is manufactured strictly under our ISO 9001 certified quality management protocol and complies with relevant CE Directives (LVD and EMC standards EN 61000-6-1 / EN 61000-6-3) alongside RoHS requirements. Official Declaration of Conformity documents and detailed test laboratory reports are readily provided upon request for customs clearance and regulatory validation.
Why must we install a buck-boost charger rather than a buck-only unit for Euro 6 smart alternators?
A buck converter can only step voltage down (input must remain consistently higher than output). Euro 6 and Euro 7 commercial vehicles feature smart ECU regenerative braking alternators whose voltage frequently drops down to 12.2V or surges up to 15.4V. A buck-boost charger regulates flawlessly throughout this entire operating window, stepping up when the alternator sags and stepping down when it surges, maintaining an exact CC/CV 14.6V charge for LiFePO4 cells.
When is galvanic isolation required in Danish marine and industrial projects?
Galvanic isolation is essential when input and output return circuits must remain strictly independent. In marine applications docked at Aarhus Harbor, isolated units prevent stray direct current from running through the vessel's hull or earth wire, preventing accelerated galvanic corrosion. In industrial telecom and forklift networks, isolation eliminates ground loops and shields sensitive electronics from high-voltage spikes caused by heavy motor drives.
What OEM/ODM customization options are offered by the factory?
We provide comprehensive turnkey OEM/ODM services: customized input and output voltage ranges, non-standard CC/CV charging thresholds for emerging lithium/sodium chemistries, customized wiring harness lengths and terminal plugs (e.g., Anderson, Deutsch, ring lugs), aluminum heatsink private labeling, waterproof IP68 potting, and digital telemetry protocols (RS485 Modbus RTU).
What are the standard shipping methods and payment terms for delivery to Aarhus, Denmark?
We support standard FOB Shenzhen or EXW terms, as well as door-to-door DDP air and sea freight logistics directly to your facility in Aarhus or Jutland. Fast air express (DHL/FedEx/UPS) typically takes 5–8 business days for engineering prototypes. High-volume sea freight delivers smoothly to Aarhus Havn. Accepted payment options include T/T bank transfer, PayPal for prototype samples, and secure escrow accounts in USD or EUR.
Request Factory Direct Pricing & Engineering Datasheets
Consult with Shenzhen Eltrum’s technical engineering team regarding custom voltage envelopes, bulk wholesale pricing, or sample orders for your application in Aarhus.
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