Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Input / Output: DC 12V → DC 43.8V
- Max Output Current: 13A (Continuous)
- Ingress Rating: IP68 Full Resin Potting
- Protection: OVP, OCP, OTP & Reverse
500+
Standard Models
IP68
Epoxy Potted Seal
130+
Export Nations
ISO9001
CE & RoHS Certified
Engineered Portfolio
Featured Industrial Waterproof DC Conversion & Charging Solutions
Select from our rigorously tested topologies: wide-range step-up/step-down stabilizers, multi-stage CC/CV lithium battery chargers, and galvanic-isolated power converters constructed for demanding operating environments.
600W Waterproof AC-to-DC LiFePO4 Charger
- Input Voltage: 90–265V AC Universal
- Nominal Outputs: 14.6V / 29.2V / 58.4V
- Enclosure: Die-Cast Aluminum IP65
- Topology: PFC + LLC Resonant Half-Bridge
300W Sealed Marine AC-DC Lithium Pack Charger
- Battery Support: LiFePO4 & Ternary Li-ion
- Termination Voltage: 14.6V / 29.2V / 43.8V
- Environmental: Anti-Salt Corrosion IP67
- AC Connection: US / EU / UK / AU Config
400W DC-to-DC Dual Battery Charger (10–36V In)
- Input Window: 10V – 36V Wide DC Range
- Charging Profiles: 14.6V (12V) / 29.2V (24V)
- Auxiliary Support: Alternator Smart Ignition Pin
- Efficiency: Up to 96% Synchronous Rect.
1500W High Power Buck-Boost Converter with RS485
- Input Swing: 10V – 60V Wide DC
- Regulated Output: 12V / 24V / 28V / 48V Fixed
- Control Port: Modbus RTU over RS485
- Thermal Manage: Internal Heatsink + Forced Air
24V to 12V 100A Step-Down Industrial Regulator
- Input Rating: 18V – 35V DC System
- Continuous Output: 12V DC @ 100A (1200W)
- Application: Commercial Trucks & Heavy Fleet
- Sealing: Solid Silicone Gel Potted IP68
Isolated 18–90V to 12V 10A Telecom-Grade Converter
- Galvanic Isolation: 1500V DC Primary-to-Secondary
- Ultra-Wide In: 18V – 90V Continuous DC
- Output Regulation: 12V ±1% Low Ripple Noise
- Immunity: Ground-loop isolation & anti-surge
Waterproof 12V to 48V 20A High-Current Boost Unit
- Input Source: 9V – 20V Lead-Acid / Lithium
- High Output: 48V ±0.5V @ 20A (960W)
- Case Construction: Extruded Aluminum Fin Heat Dissipation
- Reliability MTBF: >100,000 Hours Field Tested
Regional Deployment Dynamics
Localized Application Scenarios across Holguín Province
From the coastal maritime corridors of Gibara to the nickel-cobalt processing nodes of Moa and the agricultural centers in the Holguín basin, our waterproof DC power modules are purpose-built to conquer specific environmental stressors.
Coastal Marine & Fishing Fleets
Holguín’s fishing cooperatives operating out of Puerto de Vita, Gibara, and Banes face high atmospheric salinity and constant humid washdown. Our IP68-rated potted chargers and 24V-to-12V buck converters prevent terminal corrosion and galvanic ground failure, keeping marine VHF radios, depth sounders, and onboard navigation safely powered.
Resilient Solar Microgrids & BESS
With ongoing regional energy initiatives across Eastern Cuba, distributed solar systems and localized battery energy storage systems (BESS) require wide-input buck-boost stabilizers (10–60V). When rooftop solar array voltages fluctuate under intermittent cloud cover, our units regulate a precise 12V, 24V, or 48V bus for domestic clinics and municipal micro-grids.
Moa Nickel Industrial & Mining Fleets
The heavy open-cast mining and extraction vehicles operating near Moa subject auxiliary DC electronics to severe mechanical vibration, red laterite dust ingress, and electrical transient spikes. Our resin-encapsulated buck modules stabilize 72V/48V traction buses into filtered 12V/24V telemetry, lighting, and engine control supplies.
Tourism Transport & EV Shuttles
Guardalavaca and Playa Pesquero resort operations heavily depend on electric golf carts, light utility vans, and shuttle buses. Our multi-voltage 48V–72V step-down converters and 1000W IP65 LiFePO4 battery chargers withstand tropical rain squalls, ensuring 24/7 guest mobility without moisture-induced short circuits.
Rural Telecommunications Repeaters
Telecom towers situated on elevated terrain like the Loma de la Cruz demand high galvanic isolation. Our 18–90V isolated DC converters protect base station transceivers from severe ground loops, lightning strike earth potential rise (EPR), and unstable battery bank discharge swings during prolonged outages.
Agricultural Irrigation Automation
Holguín’s inland sugar cane and citrus plantations utilize autonomous solar drip-irrigation pumps and remote valve actuators. Operating under scorching 38°C ambient conditions, our convection-cooled IP68 converters maintain zero derating up to 55°C without requiring vulnerability-prone cooling fans.
Engineering White Paper
Regional Electrification Trends & Power Supply Resilience in Holguín
How shifting Caribbean infrastructure parameters require hardened switch-mode power supply (SMPS) design topologies.
Infrastructure operators and technical procurement directors across Eastern Cuba are currently managing a dual transition: modernizing legacy electrical networks while rapidly deploying off-grid solar-plus-storage platforms. In tropical Caribbean provinces like Holguín, where relative humidity often surpasses 90% and average coastal temperatures range from 28°C to 36°C, conventional open-frame or fan-ventilated power supplies experience premature electrolytic capacitor degradation and catastrophic PCB trace copper oxidation.
1. Accelerated Lithium Cell Adoption
Holguín enterprises are systematically transitioning from lead-acid traction banks to LiFePO4 chemistry. This requires CC/CV charging algorithms with precise termination at 3.65V per cell to avoid BMS shutdown and thermal runaway.
2. Wide DC Fluctuations During Peak Hours
Severe line sags and voltage dips on local grids make wide-input buck-boost topologies mandatory. Our systems maintain line-regulation within ±1% even when line voltages drop by 45% of nominal values.
3. Solid Resin Potting vs. Airborne Salt Fog
Mechanical enclosure vents suck in airborne sodium chloride ions that generate galvanic dendritic crystal bridging on SMD components. Solid epoxy potting guarantees hermetic protection and 100% vibration immunity.
Shenzhen, China
ISO 9001 Certified Factory
Enterprise Superiority
Direct Engineering Authority Behind Every Unit Shipped
Established in 2015, Shenzhen Eltrum Electronic Co., Ltd. operates high-precision SMT, automated magnetic winding, hermetic vacuum-potting, and 100% full-load burn-in facilities in Shenzhen. Serving commercial distributors, system integrators, and engineering buyers globally, our comprehensive direct-export framework guarantees rigorous build quality.
Complete OEM / ODM Customization
Custom input/output configurations, tailored multi-stage CC/CV charging curves, client-specified waterproof connectors (Deutsch, Anderson, M12), and customized private label branding.
Stringent ISO 9001, CE & RoHS Compliance
Every batch undergoes incoming component inspection, automated optical inspection (AOI), automated potting thermal curing, and continuous 4-hour dynamic load testing prior to container dispatch.
Engineer-Direct Support & Low Sample MOQ
Direct dialogue with power supply design engineers—no commercial middlemen. Prototype evaluation samples available from 5 units for qualification testing on Cuban fleet systems.
Procurement Intelligence
Frequently Asked Questions by Industrial Buyers in Holguín
Essential technical and logistics considerations for purchasing waterproof DC-DC converters and battery chargers directly from our manufacturing base.
Why is potting superior to IP65 gasketed enclosures in Holguín’s maritime zones?
Gasket seals eventually degrade under the combined effects of intense ultraviolet radiation and high ambient Caribbean temperatures, creating micro-gaps that pull in humid, salt-saturated air during day-to-night thermal cycles. Solid thermal polyurethane or epoxy potting completely encapsulates all components, eliminating internal air pockets, preventing condensation, and improving heat dissipation directly to the aluminum chassis.
How do Eltrum DC-DC chargers safeguard alternator life on transport vehicles?
Connecting a depleted LiFePO4 battery directly to a standard lead-acid alternator causes the lithium pack to demand high amperage, leading to alternator winding overheating and premature stator failure. Our battery-to-battery (B2B) chargers regulate input current draw, step the voltage up or down as required, and apply a 3-stage CC/CV curve without straining vehicle electrical architecture.
What is the difference between non-isolated and isolated converters for mining fleets?
Non-isolated converters share a common negative ground between input and output, which provides higher efficiency and smaller form factors for basic automotive lighting. In heavy Moa mining machinery and marine equipment, ground faults or induction surges can transfer between circuits. Galvanic isolation (transformer coupling up to 1500V DC) protects sensitive PLCs, radios, and telemetry hardware against ground noise and transient spikes.
What are the minimum order quantities (MOQ) and freight arrangements for Eastern Cuba?
Standard production models have an entry MOQ of just 5 units, allowing project teams to run functional bench and field trials. Custom OEM units typically start at 50–100 units. We facilitate EXW, FOB Shenzhen, or CIF container consolidation through Caribbean freight forwarders, supplying complete HS documentation, CE certificates, and commercial invoices.
Can charging algorithms be customized for extreme Caribbean ambient temperatures?
Yes. Lithium cells should not be fast-charged above 45°C or below 0°C without risk of copper plating or electrolyte degradation. Our design team can integrate external NTC temperature sensor leads and custom MCU firmware profiles that dynamically derate charge current based on real-time pack surface temperatures.
How do buck-boost converters resolve severe battery voltage sag under cold cranking?
When heavy diesel starter motors engage, a nominal 12V or 24V battery bank can drop as low as 8V or 16V for several seconds, causing microcontrollers and telematics to reboot. A buck-boost converter operates seamlessly across the 8–40V window, stepping up during the crank dip and stepping down during alternator overcharge, maintaining a stable 12.0V or 24.0V output rail.