Smart 36V Lithium Battery Charger DC 12V to DC 43.8V 13A
- TopologyStep-Up Boost CC/CV
- Input RangeDC 10.5V – 16.0V
- Output Profile43.8V @ 13A (LiFePO4)
- ProtectionIP67 Waterproof Sealed
Engineered Power Catalog
High-Efficiency DC-DC Converters & Battery Chargers
Explore our eight most requested converter platforms engineered for commercial mobility, telecom backhaul, off-grid solar, and harsh environment marine fleets.
600W Waterproof AC-DC LiFePO4 Smart Charger (14.6V–58.4V)
- TopologyPFC + LLC Resonant
- Input RangeAC 90V – 264V Universal
- Charge Power600W Continuous
- Efficiency94.5% Peak
12V/24V/36V/48V 600W Marine & EV Waterproof Charger
- Target ChemLiFePO4 / Ternary Lithium
- Thermal MgmtAnodized Heat Sinks
- Safety CutoffOVP, OCP, OTP, Reverse
- ComplianceCE / RoHS / ISO 9001
400W DC-DC Battery-to-Battery Charger for RV Dual Systems
- Input VoltageDC 10V – 36V Alternator
- Charge Target14.6V / 29.2V / 43.8V
- Alternator SafeSmart Ignition D+ Detect
- Form FactorCast Aluminum IP68
1500W Wide-Input Buck-Boost Converter with RS485 Bus
- Input DynamicDC 10V – 60V Wide Window
- Output Stable12V / 24V / 28V / 48V Reg
- CommunicationRS485 Modbus RTU
- Power Density96.2% High Efficiency
10V–44V to 12V 50A/60A High-Current Voltage Stabilizer
- Input Swing10V – 44V Cranking Safe
- Output Current50A – 60A (Up to 720W)
- Voltage Ripple< 40mV RMS Low Noise
- ProtectionFull Silicon Potting IP68
Ultra-Wide 18V–90V to 12V 10A Industrial Isolated Converter
- Isolation Rating1500V DC Galvanic Barrier
- Input Span18V – 90V (24/36/48/72V)
- Rated Output12V DC @ 10A (120W)
- Noise RejectionGround Loop Immunity
24V to 12V 85A/100A Commercial Step-Down Buck Regulator
- Continuous Amps85A – 100A Max 1200W
- SynchronousDual Phase Rectification
- Fleet UsesTrucks, Heavy Buses, Marine
- EnclosureHeavy-Duty Fin Extrusion
Enterprise Manufacturing Benchmark
Why Tier-1 Global Procurement Teams Partner with Eltrum
In power electronics manufacturing, the delta between budget component assembly and mission-critical reliability lies in magnetic core precision, thermal potting integrity, and automated burn-in stress testing.
Precision Engineering from Shenzhen's Premier Power Hub
Founded in 2015, Shenzhen Eltrum Electronic Co., Ltd. has scaled into one of China's most trusted manufacturers and exporters of switch-mode power converters, wide-input DC-DC voltage regulators, and intelligent lithium battery charging solutions. Located in the Hangcheng industrial corridor of Shenzhen, our facility integrates complete SMT lines, automated planar transformer winding, robotic silicone dispensing, and dynamic thermal chambers.
Unlike trading entities that rebrand commercial-grade modules, Eltrum operates under a zero-compromise ISO 9001:2015 certified quality management system. Our specialized engineering core traces its roots directly to isolated telecommunication switch-mode power supplies (SMPS), where zero field failure is the baseline requirement. This military-grade discipline is engineered into every standard buck, boost, buck-boost, and battery charger model we deliver.
ISO 9001 Certified
CE Compliant (EN 61000-6)
RoHS Directive 2011/65/EU
OEM / ODM Custom Tailoring
Today, our portfolio spans over 500 standard production models deployed across 130+ nations, serving elite automotive builders, off-grid telecom operators, municipal utility contractors, and marine auxiliary integrators across North America, Europe, Australia, and East Asia.
500+
Standard Power Models
130+
Export Destinations
96.8%
Peak Conversion Efficiency
5pcs
Engineering Prototype MOQ
Production Excellence
Engineering Disciplines That Protect Your Brand Equity
A failed DC-DC converter in a recreational vehicle, autonomous mobile robot (AMR), or off-grid solar site risks catastrophic downstream payload destruction. Here is how our Shenzhen facility prevents thermal, electrical, and mechanical breakdowns.
Automated SMT & Planar Magnetics
Our SMD assembly utilizes high-speed Yamaha and Panasonic placement machines ensuring micron-level solder paste placement. We implement planar magnetic transformers and custom toroidal chokes that dramatically minimize parasitic inductance, lower core thermal losses, and eliminate human winding variance.
- High-frequency low-ESR solid electrolytic capacitors
- Automated Optical Inspection (AOI) post-reflow
- Multi-layer PCB layouts designed for optimal EMI dampening
Hermetic IP68 Thermal Encapsulation
Unlike competitors relying on polyurethane resins that crack over thermal cycling, Eltrum uses premium two-component thermally conductive silicone potting compound (thermal conductivity > 1.5 W/m-K). This provides permanent hermetic sealing against moisture, salt spray, engine vibrations, and aggressive shock.
- 100% IP65 / IP67 / IP68 submersion tested units
- Uniform heat conduction directly to outer aluminum fin casing
- Zero condensation ingress during extreme sub-zero to 85°C swings
100% 4-Hour Dynamic Burn-In Testing
Every single power unit passing our assembly line is subjected to a minimum 4-hour dynamic full-load burn-in cycle inside elevated temperature test chambers. We cycle input voltages across minimum, nominal, and peak extremes to force latent semiconductor infant mortality before dispatch.
- Automated electronic load tracking under full rated current
- Transient pulse surge validation (ISO 7637-2 pulse 5a load dump)
- Comprehensive serial number tracking and batch traceability
Topology Architecture Guide
Selecting the Exact Conversion Architecture
Field failures frequently arise from deploying non-isolated step-down converters in high-common-mode-noise environments, or utilizing standard buck circuits where battery sag breaches the dropout headroom. Review our comparative engineering matrix.
| Circuit Topology | Voltage Input vs Output | Peak Efficiency | Ground Plane Isolation | Ideal Industrial Applications | Procurement Priority |
|---|---|---|---|---|---|
| Buck (Step-Down) | Vin(min) > Vout + Dropout (e.g., 24V/48V → 12V) | 95.5% – 97.2% | Common Ground (Non-Isolated) | Commercial trucks, transit buses, heavy earthmovers, 48V telecom battery taps. | Maximum energy efficiency and lowest unit cost per continuous watt. |
| Boost (Step-Up) | Vin(max) < Vout (e.g., 12V → 24V/36V/48V) | 94.0% – 96.5% | Common Ground (Non-Isolated) | Powering 24V radar or 48V electric thrusters from 12V starter battery banks. | Requires robust thermal sizing; peak current occurs at lowest input voltage. |
| Buck-Boost (Stabilizer) | Vin swings above & below Vout (e.g., 9V–40V → 12V / 24V) | 92.0% – 95.0% | Common Ground (Non-Isolated) | Engine cranking voltage sag, fluctuating solar PV panels, auxiliary battery buffers. | Critical for sensitive navigation, edge AI computers, and medical refrigeration. |
| Galvanically Isolated | Wide universal spans: 18V–36V, 36V–75V, 18V–90V | 89.0% – 93.5% | >1500V DC Galvanic Transformer Barrier | High-voltage EV traction packs, industrial PLCs, telecom positive-ground racks. | Mandatory when ground loops, electrical noise spikes, or safety isolation exist. |
Need an engineered custom input window, modified charging algorithm, or MIL-STD vibration compliance?
Inquire Now for Custom Engineering
Strategic Horizon
Future Procurement Trends in Industrial DC Voltage Conversion
The global transition to electrification, smart grids, and high-density energy storage is radically altering the specifications overseas buyers require from Chinese power factories over the next 3 to 5 years.
01
Wide-Bandgap Semiconductors (GaN & SiC)
Silicon MOSFETs are approaching their physical thermal limits. Tier-1 Chinese exporters are integrating Gallium Nitride (GaN) and Silicon Carbide (SiC) switches to operate at 300kHz–1MHz switching frequencies, reducing magnetic core volume by 40% and shrinking module footprints while lifting efficiency above 97%.
02
Bidirectional Power & V2X Integration
Traditional unidirectional converters are giving way to bidirectional topologies. In commercial fleet and stationary battery storage systems, modules must seamlessly step down 48V to 12V for auxiliary cabin electronics while inversely boosting 12V back into the 48V bus during emergency power take-off (PTO).
03
Digital Telemetry: RS485, CAN 2.0B & LIN
Analog "blind" power bricks are rapidly being phased out by OEM fleet engineers. Modern converters feature integrated microcontrollers executing Modbus-RTU over RS485 or CAN-bus protocols, delivering real-time telemetry on operating temperature, output current draw, ripple voltage, and predictive fault logs.
04
Ultra-Wide 8V–90V Universal Dynamic Inputs
Supply chain leaders seek SKU consolidation. Rather than ordering separate converters for 12V, 24V, 48V, and 72V platforms, modern procurement targets single universal wide-input topologies (e.g., 18V–90V) capable of stabilizing outputs across diverse equipment fleets without maintaining segmented buffer inventory.
Procurement Risk Mitigation
How to Audit a Chinese DC Voltage Converter Manufacturer
A rigorous factory qualification checklist compiled by our chief power electronics engineers to safeguard international buyers against subpar assembly, recycled components, and exaggerated datasheet ratings.
1. Verify Real Component Provenance
Inquire whether the factory procures switching MOSFETs, controller ICs, and diodes directly from authorized distributors (Texas Instruments, STMicroelectronics, Infineon, Onsemi) or uses unbranded secondary spot-market lots. Demand bills of materials (BOM) transparency to eliminate recycled semiconductors that fail under sudden temperature swings.
2. Inspect Thermal Derating Curves
Examine whether published output amperages are rated at 25°C ambient or realistic 50°C/60°C operating conditions. Substandard manufacturers display "peak surge" ratings as continuous ratings. Reliable manufacturers like Eltrum clearly publish thermal derating graphs detailing expected continuous wattage drop above 40°C in unventilated enclosures.
3. Scrutinize EMI/EMC Test Reports
Unshielded switch-mode converters create aggressive electromagnetic interference (EMI) that cripples GPS signals, radio communications, and CAN networks in modern vehicles. Require formal test reports certifying compliance with EN 55032 Class B (Conducted & Radiated Emissions) and ISO 7637-2 electrical disturbance standards.
The Total Cost of Ownership (TCO) Equation for OEM Buyers
A converter priced $2.00 lower from an unverified workshop often carries a warranty RMA rate exceeding 3.5%. Factoring in international reverse logistics, technician field repair costs, customer brand erosion, and potential liability from thermal runaway, the true cost of subpar power electronics is devastating. Partnering with an ISO 9001 certified manufacturer with verified 100% burn-in reduces total warranty exposure to under 0.08%.
Procurement Clarity
Frequently Asked Questions by Technical Sourcing Teams
Direct answers from our senior applications engineering department addressing minimum order quantities, customization parameters, validation timelines, and delivery protocols.
What is the typical Minimum Order Quantity (MOQ) for prototypes vs. mass production? +
To empower development engineers during bench prototyping and vehicle fitment validation, Shenzhen Eltrum Electronic Co., Ltd. supports low-volume trial orders starting from just 5 units across most standard catalogue converters and chargers. High-power units (1500W+) can be sampled from 1–2 units. For custom OEM/ODM designs requiring dedicated tooling or tailored PCB layouts, standard production MOQs range from 50 to 100 units.
How do Eltrum DC-DC chargers protect smart vehicle alternators from LiFePO4 overload? +
Lithium iron phosphate (LiFePO4) batteries exhibit extremely low internal resistance and will attempt to pull maximum current from an alternator. In modern vehicles with Euro 6 / smart alternators, this results in catastrophic alternator stator overheating and voltage oscillation. Our battery-to-battery chargers (e.g., WG-12C800M series) feature built-in smart alternator D+ ignition sensing and active current limiting, delivering an engineered CC/CV 3-stage curve (14.6V bulk/absorption, float, and cutoff) without stressing the starter battery or alternator.
When must an engineering team specify an Isolated Converter over a non-isolated model? +
Non-isolated buck or boost converters share a common negative ground plane between input and output. You must specify a Galvanically Isolated Converter in the following scenarios:
- Positive-Ground Installations: Standard in telecommunications and legacy telecom battery banks (-48V DC).
- Ground Loop Elimination: Breaking noise circulating through sensitive analog sensors, marine navigation sonars, and industrial PLC control racks.
- High-Voltage Safety Separation: Stepping down 72V, 80V, or 90V traction battery packs in electric forklifts, airport ground equipment, and AGVs where electrical shock hazards must be physically isolated from the chassis.
What custom OEM/ODM parameters can your engineering team tailor? +
Our comprehensive engineering team provides complete end-to-end turnkey customization:
- Input/Output Tuning: Non-standard target voltages (e.g., 13.8V, 19.5V, 28V, 54.4V) and adjustable current limits.
- Charging Profiles: Programmable multi-stage CC/CV curves for LiFePO4, LTO, NMC, AGM, and Gel chemistries.
- Custom Connectors: Integrated Deutsch, Anderson Powerpole, Molex, waterproof aviation pins, or customized wire harnesses.
- Enclosures & Heat Dissipation: Compact footprint aluminum extrusions, specific mounting flange patterns, custom silkscreens, and laser-etched buyer branding.
- Digital Bus Protocols: Customized RS485 Modbus registers, CAN 2.0B integration, and remote on/off enable logic.
What are your international warranty terms, testing documentation, and lead times? +
All Eltrum industrial converters and chargers carry a standard 24 to 36-month factory warranty supported by serial-tracked quality logs. We provide full certificate copies of CE (EMC/LVD), RoHS, and factory ISO 9001 compliance, alongside individual production test sheets upon request. Standard catalog sample orders dispatch within 3–5 working days; volume container and sea-freight orders typically ship within 15–22 working days via FOB Shenzhen or EXW terms.
How do your modules handle automotive cranking voltage drop and load dump spikes? +
Automotive and heavy equipment electrical systems suffer severe voltage fluctuations: cold cranking causes 12V rails to drop down to 8V or lower, while alternator field decay can induce transient overvoltage spikes up to 100V (ISO 7637-2 load dump). Our wide-input buck-boost converters and heavy-duty buck series integrate multi-stage transient voltage suppression (TVS) diodes, heavy LC input filtering, and ultra-fast PWM controllers that maintain rock-solid regulated output voltages across harsh vehicular spikes and sags without resetting connected electronics.
Accelerate Your Power Supply Sourcing Pipeline
Consult directly with our Shenzhen power engineering team. Share your target input voltage window, required continuous amperage, thermal environment, and target annual volume for an immediate technical quote and complimentary sample evaluation.