Smart 36V Lithium Battery Charger DC 12V to DC 43.8V 13A
- TopologyDC-DC Boost CC/CV
- Input Range10V – 36V DC
- Output Profile43.8V DC @ 13A Max
- Efficiency≥ 94.5%
Engineered For Extreme Environments
High-Efficiency Waterproof DC Power Solutions
Explore our heavy-duty, potted aluminum modules designed for extreme vibration, thermal shock, water ingress, and volatile battery transients. Tested across 500+ commercial vehicle and industrial platforms.
1500W Buck-Boost Converter DC 10–60V with RS485 Bus
- TopologySynchronous Buck-Boost
- Input Window10V – 60V Continuous
- Configurable Out12V / 24V / 28V / 48V
- ProtectionThermal, Short, Over-V
Industrial Isolated DC 18–90V to 12V 10A Waterproof Module
- Isolation Barrier1500V DC Galvanic
- Input Range18V – 90V Ultra-Wide
- Regulated Out12V DC ± 1.5% @ 10A
- HousingDie-cast Aluminum IP68
24V to 12V 100A Heavy-Duty Commercial Vehicle Buck Module
- Current Rating100A Continuous (1200W)
- Input Nominal24V DC (18V – 35V Operating)
- Ripple & Noise< 50mVp-p Low Noise
- StandardISO 7637-2 Surge Proof
600W IP65 AC-DC LiFePO4 Charger 14.6V to 58.4V
- Mains Input90V – 264V AC Universal
- Chemistry Curve3-Stage CC/CV LiFePO4
- Potted StandardPolyurethane IP65 Seal
- CertificationCE, RoHS, FCC Listed
400W B2B Alternator-to-Battery Charger for RV & Overlanding
- Alternator In10V – 36V Smart Euro 6
- Charging Rails14.6V / 29.2V Presets
- Ingress RatingIP68 Submersible Design
- Control LogicAuto Ignition Detect
12V to 48V 20A Step-Up Industrial Boost Converter (960W)
- Input Voltage10.5V – 16V DC Low Rail
- Output Target48V DC ± 1% @ 20A
- Thermal Envelope-40°C to +85°C Baseplate
- EnclosureEpoxy-Filled Solid Alloy
36V–75V to 24V 5A Isolated Base-Station Power Module
- Galvanic IsolationTrue Optical & Magnetic
- Input Nominal48V Base Station Bus
- RegulationPrecision Servo Loop
- CertificationCE, RoHS, ISO 9001 Line
Supplier Intelligence Directory
Top 10 Waterproof DC Power Supply Suppliers & Exporters
A rigorous comparative analysis of dominant global manufacturing players, evaluating topology versatility, IP potting integrity, ODM velocity, and international supply chain agility.
01
Premier ODM/OEM Power Conversion Hub: Specializing in wide-input isolated converters, synchronous buck-boost modules (up to 1500W), and heavy-duty LiFePO4 battery-to-battery charging systems. Eltrum stands out for rapid prototyping, robust epoxy-potted waterproof enclosures (IP67/IP68), and a baseline MOQ starting at just 5 units for rapid OEM design validation.
02
Benchmark in Ultra-High Power Density: World leader in modular power components and Factorized Power Architecture (FPA). Offers hermetically sealed ChiP and VIP package topologies for high-reliability aerospace, defense, and electric vehicle chassis systems where weight and volumetric density command premium capital budgets.
03
Global Commercial Power Standard: Globally recognized for commoditized catalog availability. Their HEP (Harsh Environment Power) series offers aluminum potting with IP67 waterproofing capabilities, suited for outdoor telecommunications, roadside signage, and municipal LED driver installations.
04
Industrial Precision & Reliability: Highly recognized for harsh environment baseplate-cooled modules. Their power architectures deliver exceptional MTBF figures, minimal electromagnetic interference (EMI Class B compliance), and rigorous compliance for medical-grade and factory automation systems.
05
Railway & Critical Automation Specialists: Renowned for high-isolation potted DC-DC converter blocks complying with EN 50155 European railway standards. Ideal for rolling stock, subsea sensor integration, and industrial computing in heavy shock environments.
06
Tier-1 Automotive & Megawatt Infrastructure: Mass-scale industrial conglomerate providing heavy EV on-board DC-DC converters and IP67 industrial chargers. Excels in Tier-1 automotive manufacturing contracts requiring million-unit supply lines.
07
Brick Converters with Conduction Cooling: Specializes in half-brick and full-brick encapsulated DC-DC modules with high thermal efficiency. Widely deployed in marine propulsion electronics, outdoor 5G base transceivers, and defense mobility.
08
Extreme Custom Heavy-Duty Architecture: Focuses exclusively on custom-engineered ruggedized power supplies. Offers IP66-sealed, convection-cooled switch-mode power systems for mining haul trucks, utility substations, and maritime propulsion.
09
E-Mobility & Grid Inversion Expert: Major supplier of bidirectional DC-DC converters and rugged on-board chargers for municipal bus fleets, construction excavators, and utility vehicles operating under harsh water washdown conditions.
10
Micro-Power Encapsulation & Sensors: Dominant supplier of compact potted board-level isolated DC-DC modules. Exceptional galvanic isolation ratings and magnetic design make them standard for robotics, medical equipment, and precision sensors.
Engineering Selection Framework
Standard Waterproof Power Module Topology Comparison
Review key technical benchmarks across Eltrum's core conversion topologies to accurately select power components for harsh environment electrical systems.
| Circuit Topology | Typical Input Range | Output Voltage Options | Efficiency Rating | Galvanic Isolation | Primary Industrial Use Case |
|---|---|---|---|---|---|
| BUCK (Step-Down) | 24V, 36V, 48V, 72V (Up to 90V) | 5V, 12V, 13.8V, 24V | 94% – 97% | Non-Isolated (Common Ground) | Commercial Vehicle 24V→12V, Golf Cart 48V Accessories |
| BOOST (Step-Up) | 10V – 16V, 18V – 32V | 24V, 36V, 48V, 58.4V | 92% – 95% | Non-Isolated | 12V Vehicle to 48V High-Torque Actuators, LED Lighting Arrays |
| BUCK-BOOST | 8V – 40V, 10V – 60V Continuous | 12V, 13.8V, 19V, 24V, 28V | 91% – 95% | Non-Isolated | Automotive Cranking Stabilizers, Solar Battery Fluctuation |
| ISOLATED REGULATOR | 18V – 36V, 36V – 75V, 18V – 90V | 5V, 12V, 24V Precision | 88% – 92% | 1500V – 3000V DC Isolated | Telecom -48V Racks, Heavy Industrial AGVs, Marine Ground Loops |
| SMART B2B CHARGER | 8V – 36V, 10V – 44V Wide | 14.6V, 29.2V, 43.8V, 58.4V | 93% – 96% | Optional Isolation Available | Euro 6 Alternator to LiFePO4 RV & Overlanding Dual Batteries |
Strategic Sourcing Analysis
Future Procurement Trends in Industrial Power (2025–2030)
In-depth market intelligence covering how international OEMs, fleet managers, and industrial design teams are upgrading their power electronics supply chains.
1. GaN & SiC Semiconductor Transition
Global procurement teams are shifting toward Gallium Nitride (GaN) and Silicon Carbide (SiC) architectures. These wide-bandgap materials minimize switching losses, allowing 300% higher switching frequencies. This shrink-down translates directly into smaller magnetics and 40% reduced potted enclosure dimensions without sacrificing output current.
2. Digital Telemetry via CANbus & RS485
Stand-alone, unmonitored power supplies are increasingly considered legacy equipment. Modern procurement requirements mandate dynamic digital communication. Real-time telemetry via isolated RS485 Modbus or CANopen protocols lets central telematics modules track load current, internal thermals, and fault histories before field downtime occurs.
3. Unified Wide-Input Standardization
Supply chain resilience is driving consolidation. Engineering buyers prefer stocking a single 18V–90V ultra-wide input SKU over three narrow-band models (such as separate 24V, 48V, and 72V units). This strategy dramatically reduces inventory complexity for material managers across diverse e-mobility and logistics fleets.
4. Advanced Polyurethane & Silicone Potting
Harsh marine and high-sulfur agricultural machinery require higher IP standards. Procurement standards have moved from simple conformal coatings to vacuum-degassed epoxy, polyurethane, or structural silicone potting. This guarantees complete moisture exclusion, Class 1 Div 2 flame resistance, and continuous MIL-STD-810H vibration protection.
5. Closed-Loop Battery Chemistry Matching
With Lithium Iron Phosphate (LiFePO4) dominating commercial vehicle house batteries and light electric vehicles, converters and chargers must implement strict CC/CV multi-stage charging algorithms. Systems must hold steady absorption (e.g. 14.6V or 29.2V) and avoid float overcharging to protect external battery BMS circuitry.
6. Direct-From-Source Agile Prototyping
Lead times from legacy western catalog distributors often extend past 26 weeks. Engineering sourcing leads are partnering directly with ISO 9001 certified manufacturing plants in Shenzhen. Direct factory access enables customized housing profiles, unique harness connectors, and fast-track sample validation in under 14 days.
2015
Established Excellence
Enterprise Manufacturing Authority
Shenzhen Eltrum Electronic Co., Ltd.
Founded in 2015, Eltrum is a world-class designer and manufacturer of DC-DC conversion systems, smart battery-to-battery chargers, and high-reliability industrial power modules. Starting from transformer-isolated industrial DC-DC circuits, our Shenzhen plant now exports high-efficiency power equipment to Tier-1 system integrators and distributors worldwide.
Every waterproof power supply undergoes surface mount technology (SMT) automation, thorough vacuum potting, and automated high-temperature full-load burn-in testing. With third-party onsite factory verification and ISO 9001 operational standards, we deliver robust solutions built around our core tenet: Quality Engineering First, Superior Service Always.
500+
Active SKUs
130+
Export Markets
3,000m²
Factory Footprint
5pcs
Sample MOQ
ISO 9001 Certified
CE European Conformity
RoHS Environmental
Full OEM/ODM Support
Procurement Clarity
Frequently Asked Questions by Sourcing & Engineering Teams
Key technical and logistics inquiries addressed by our field application engineers to assist your component sourcing process.
What is the fundamental difference between Isolated and Non-Isolated DC-DC Converters?
Non-isolated converters utilize a common ground line between the input and output rails. They are highly efficient (often reaching 95%–97%) and cost-effective, making them suitable for automotive chassis grounds and common-battery vehicle accessories.
Isolated DC-DC converters incorporate a high-frequency magnetic transformer barrier that separates the input and output circuits. This design eliminates ground loops, blocks electrical noise transients, and isolates floating grounds. It is required in telecom (-48V), railway systems, multi-pack material handling equipment, and sensitive analog sensor circuits.
How does IP67/IP68 potting protect converters from thermal expansion and chemical exposure?
Our modules use vacuum-degassed two-part silicone or high-grade polyurethane compounds to fill the entire cast-aluminum enclosure. This potting serves multiple functions: it locks out moisture and dust (meeting IP67 immersion tests at 1m for 30 minutes, or IP68 continuous submersion), dampens high-frequency mechanical vibration, and acts as a thermal bridge. Conductive potting compound transfers heat directly from internal MOSFETs and magnetic cores to the finned exterior chassis, preventing localized hot spots.
When must an engineer choose a Buck-Boost topology instead of standard Buck or Boost?
You must choose a Buck-Boost converter when the system source voltage can swing both above and below the target output voltage. For example, a nominal 12V auxiliary lead-acid or LiFePO4 battery may dip to 9V during engine cranking and rise to 14.6V under active charging. If your critical load demands a stable 12V or 13.8V rail, a buck converter fails during cranking sags, while a boost converter fails during charging spikes. A four-switch synchronous buck-boost maintains a stable output across the entire input swing.
Can standard DC-DC converters charge LiFePO4 battery packs directly?
No, standard DC-DC power supplies should not be used as lithium chargers. Standard converters are configured for constant voltage (CV) regulation. When connected to a discharged lithium battery, the low internal impedance triggers the power supply's overcurrent protection or hiccup shutdown mode. Dedicated battery-to-battery (B2B) chargers use constant current / constant voltage (CC/CV) control logic, precise absorption cut-offs (such as 14.6V for a 4S LiFePO4 bank), and optional CAN/RS485 communication to charge safely without overheating the battery or source alternator.
What are the typical minimum order quantities (MOQ) and production lead times?
To assist R&D engineering validation, Eltrum maintains a low sample MOQ starting at just 5 units for most standard catalog models. High-capacity custom modules (such as 1500W stabilizers or RS485-programmable chargers) can be sampled in 1 to 2 units. Standard volume orders (100–1,000 units) typically ship within 12 to 18 business days. Custom ODM projects requiring unique PCB geometries, custom enclosures, or non-standard connectors take 3 to 4 weeks for initial functional prototypes.
What international quality certifications and compliance standards are verified?
Our power conversion lines are manufactured in Shenzhen under an ISO 9001 certified Quality Management System. The finished modules comply with CE standards (covering Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU) and RoHS environmental standards. In addition, our automotive-grade converters are designed to meet ISO 7637-2 electrical disturbance standards, protecting sensitive electronics from electrical transients and load dumps.
Need a Custom Voltage, Potting Material, or Enclosure?
Contact our application engineering team directly with your specific input voltage window, peak current demands, operating ambient temperatures, and communication bus requirements. We provide complete technical proposals, 3D STEP models, and validation samples.