Smart 36V Lithium Charger 12V to 43.8V 13A
- Topology: DC-DC Boost Step-Up
- Input Voltage: 10.5V – 16.0V DC
- Output Voltage: 43.8V CC/CV (LiFePO4)
- Enclosure: IP68 Resin-Potted Alloy
Direct Manufacturer Portfolio
Featured Marine & RV Battery Charging Architecture
Factory-direct, CE and RoHS compliant power management solutions for high-capacity recreational vehicles, expedition overlanders, and hybrid yacht-RV electrical conversions operating throughout St. John's, English Harbour, and Barbuda.
600W Waterproof LiFePO4 AC-DC Charger
- Mains Input: 90V – 264V Universal AC
- Configurable: 14.6V / 29.2V / 58.4V
- Thermal Mgmt: Fanless Conductive Cast
- Efficiency: ≥ 94.2% Peak
12V–48V 600W Boat & Expedition Charger
- Platform: Multi-Chemistry Hybrid
- Ingress Rating: IP66 Hermetic Seal
- Protection: OVP, OCP, OTP, Short-Lock
- Target Fleet: Campervans & Tenders
300W Marine Lithium AC-DC Charger
- Outputs: 14.6V / 29.2V / 43.8V
- Plugs Available: US / UK / EU Standard
- Salt Spray Test: ASTM B117 480-Hour Pass
- Footprint: Ultra-Slim Aluminum Case
400W DC-DC Charger for Dual RV Banks
- Alternator In: 10V – 36V Wide Input
- Charge Current: Up to 30A Continuous
- Euro 6 Smart Alt: Ignition Sense & Cut-Off
- Chemistry: LFP / NMC / Lead-Acid
1500W RS485 Buck-Boost Charger/Regulator
- DC Range: 10V – 60V Continuous
- Output Power: 1500W Scalable Rail
- Comms Protocol: RS485 Modbus-RTU
- Integration: Microgrid & Large Overlanders
10–44V to 12V 60A Precision Stabilizer
- Output Rail: 12.0V or 13.8V ±1%
- Current Output: 50A Continuous / 60A Peak
- Protection: Sub-millivolt Ripple Noise
- Use Case: Sensitive Navigation & B2B
Isolated 18–90V to 12V 10A DC-DC Charger
- Dielectric Proof: 1500V AC Galvanic Isolation
- High Input Span: 18V – 90V DC Traction Rail
- Grounding: Eliminates Ground Loops
- Harsh Shield: Full Polyurethane Encapsulation
Maritime & Overland Whitepaper
Operating Realities: Electro-Chemical Stressors in the Caribbean Marine Climate
Antigua and Barbuda represents an intensive operational proving ground for recreational vehicle and marine auxiliary power systems. Standard consumer-grade chargers invariably suffer premature failure when exposed to the nation's severe atmospheric combination of airborne halides, thermal saturation, and fluctuating electrical supply.
Chloride Deposition & Atmospheric Corrosion
The consistent northeast trade winds across Antigua sweep atomized seawater across the entire topography, maintaining ambient chloride deposition rates exceeding 300 mg/m²/day near coastal roads. In unpotted charging modules, hygroscopic salt deposits act as ionic conductors across high-voltage traces, triggering dendritic growth, dielectric flashovers, and corrosive pitting on SMD boards. Eltrum chargers utilize complete vacuum potting with thermally conductive polyurethane resin (UL94V-0), physically isolating PCB traces from maritime air.
Sustained Thermal Saturation & Solar Radiance
Ambient temperatures in Antigua regularly reach 32°C with relative humidity above 85%, which escalates internal RV compartment temperatures past 55°C. Conventional forced-air chargers rely on internal fans that draw in moisture and salt, while clogging filters and failing under continuous duty. Eltrum chargers leverage aluminum monoblock heat sinks designed with fin-geometry optimized for natural convection and conduction, maintaining rated current without derating up to 50°C ambient operating temperatures.
Island Utility Surges & Dual-Voltage Grids
Shore power infrastructure across marinas and RV sites in Antigua and Barbuda exhibits frequent transient voltage spikes, harmonic distortion, and sags ranging between 95V and 260V AC. Our AC-DC charger series incorporates wide active power factor correction (PFC ≥ 0.98) front-ends capable of seamlessly processing inputs from 90V to 264V AC at 50/60Hz, insulating sensitive lithium cell balancing circuits from unstable island distribution grids.
| Parameter / Environmental Stressor | Standard Commercial RV Charger | Eltrum Tropical-Spec Marine & RV Series | Direct Benefit in Antigua Field Deployments |
|---|---|---|---|
| Ingress Protection (Salt Spray / Rain) | IP20 – IP22 (Vented case with fan) | IP65 – IP68 Hermetically Potted | Zero salt fog ingress; completely impervious to seasonal downpours and coastal air. |
| LiFePO4 Chemistry Profiles | Generic Lead-Acid emulation; premature cutoff | Dedicated 3-Stage CC/CV with 0.1V precision | Ensures 100% SoC without triggering internal BMS over-voltage lockouts. |
| Input Range (DC-DC Converter Series) | Narrow band (11.8V – 14.5V) | Ultra-Wide 8V – 90V Multi-Span | Accommodates Euro 6 smart alternators, solar sagging, and 24V/48V coach traction rails. |
| Thermal De-rating Threshold | Drops output at 40°C compartment temp | Full Continuous Output up to 50°C | Maintains sustained high-amperage charging inside unconditioned vehicle engine bays. |
| Galvanic Isolation Rating | Non-isolated common ground | Up to 1500V AC Galvanic Isolation | Eliminates ground loops between marine hulls, vehicle chassis, and shore infrastructure. |
Power Electronics Topologies
Engineering Topology Selection for Mobile & Marine Battery Systems
Specifying the correct conversion architecture is paramount to system reliability, electrical isolation, and battery lifespan. Shenzhen Eltrum designs and produces all four core power topologies to address diverse mobile generation configurations.
Synchronous Buck Step-Down Architecture
Primary Function: High-efficiency step-down where source voltage is persistently higher than house battery potential (e.g., 24V heavy truck or 48V solar array down to 12V/14.6V house banks).
Technical Superiority: Eltrum Buck converters achieve up to 96.5% electrical efficiency utilizing synchronous MOSFET rectification, minimizing heat accumulation inside compact RV installations while supplying continuous output currents up to 100 Amperes.
High-Frequency Boost Step-Up Architecture
Primary Function: Raising standard vehicle starting voltage (12V) to charge multi-cell series battery banks such as 24V, 36V, or 48V LiFePO4 modules installed in expedition vehicles or electric auxiliary craft.
Technical Superiority: Exemplified by our flagship 12V-to-43.8V 13A smart charger, which allows standard 12V campervan alternators to charge 36V trolling motors or golf utility vehicles directly, eliminating the need for dedicated high-voltage alternators.
Seamless Four-Switch Buck-Boost Topologies
Primary Function: Regulating output voltage with absolute precision regardless of whether the source battery voltage fluctuates above, equal to, or below the target voltage.
Technical Superiority: Critical when vehicle alternator voltage sags to 10V under high cranking loads or spikes to 14.8V during aggressive charging. Our 1500W RS485 buck-boost units maintain continuous 13.8V or 28V rails without dropping output regulation.
Galvanically Isolated Transformer Topologies
Primary Function: Complete physical separation between primary (input) and secondary (output) ground references via high-frequency planar transformer coupling.
Technical Superiority: Prevents electrolytic galvanic corrosion when interconnecting dissimilar metal hulls, aluminum chassis, shore grounding paths, and onboard communications equipment throughout Antigua's coastal yacht harbors and mobile camper sites.
Localized Field Scenarios
Real-World Deployment Ecosystems Across Antigua & Barbuda
From luxury mega-yacht support tenders in Falmouth Harbour to off-grid eco-retreat glamping installations on Barbuda's pristine beaches, Eltrum power conversion systems deliver mission-critical resilience.
Dual-Battery Expedition Vehicles & Overland Campers
With rugged terrain surrounding Boggy Peak (Mount Obama) and unpaved trails along the remote southern coastline, local 4WD expedition overlanders demand rugged dual-battery charging. Connecting our 400W DC-DC battery chargers between the main starter alternator and the auxiliary lithium house bank prevents starter battery drain while supplying a stabilized 14.6V bulk charge during short island transits.
Yacht Tenders, Chase Boats & Marine Support Rigs
Antigua Sailing Week and the annual yachting season centered at Nelson’s Dockyard and English Harbour bring hundreds of luxury craft requiring auxiliary charging systems. Eltrum’s IP68 waterproof chargers service on-board 12V/24V communication electronics, navigation chart plotters, and 36V electric trolling motors subjected to constant sea spray, green water wash, and dynamic wave shocks.
Off-Grid Eco-Resort Shuttles & Utility Fleet Electrification
Barbuda’s low-impact eco-lodges and Antigua’s premier private resort islands (e.g., Jumby Bay, Mill Reef Club) rely on zero-emission electric golf fleets, utility buggies, and solar-supported mobile cabins. Our 48V-to-12V and 72V-to-24V high-current step-down buck modules power LED lighting arrays, communications gear, and refrigeration compressors directly from master vehicle traction packs.
Future Perspectives
Emerging Energy Transition & RV Electrification Trends in the Eastern Caribbean
Antigua and Barbuda is aggressively targeting 100% renewable generation under national climate resilience frameworks. This shift is revolutionizing the mobile power sector from legacy fossil-fuel generators toward integrated lithium micro-storage.
Replacement of Portable Diesel & Petrol Gensets
High local fuel costs (exceeding USD $5.50 per gallon) combined with noise pollution regulations in marine anchorages and national park conservation areas are causing fleet managers to decommission small combustion generators. High-capacity LiFePO4 house banks paired with Eltrum 1000W AC-DC and high-amperage DC-DC alternator chargers provide fast, silent replenishment during brief engine runtimes or shore power dockings.
Hybrid Solar-PV & Alternator Synergies
With an average of 3,000 hours of high solar insolation annually across Antigua, mobile RV platforms combine rooftop flexible monocrystalline arrays with smart alternator charging. Our wide-input buck-boost converters smooth wide voltage swings caused by intermittent tropical cloud covers, delivering continuous, stabilized power to onboard electronic equipment and battery banks without cycle degradation.
CAN-Bus & RS485 Remote Telemetry Integration
Fleet operators managing distributed tourist rentals or utility equipment across Barbuda require centralized telematics. Eltrum chargers featuring RS485 Modbus connectivity allow remote monitoring of charging voltage, thermal status, state-of-charge, and fault codes, drastically reducing maintenance dispatch costs across outer island territories.
Manufacturing Excellence Since 2015
Shenzhen Eltrum Electronic Co., Ltd. Precision Engineering
Operating from our 3,000 m² certified facility in Shenzhen, China, Eltrum is a specialized manufacturer of high-reliability DC-DC converters, isolated power supplies, and sealed LiFePO4 battery chargers deployed across 130+ countries worldwide.
- Certified Quality Management: Fully ISO 9001 certified manufacturing workflow with stringent CE and RoHS regulatory compliance documentation for fast customs clearance at St. John's Port.
- Automated SMT & Potting Lines: High-precision surface mount placement, automated transformer winding, and complete vacuum resin encapsulation ensuring absolute IP67/IP68 hermetic sealing.
- Low MOQ Flexibility: Standard models available from just 5 units, enabling fleet operators, marine workshops, and equipment distributors in Antigua to order agile sample validation batches.
- Comprehensive OEM/ODM Engineering: Full customization of voltage thresholds (12.6V to 58.4V), custom charging curves, Anderson/Marine connectors, and proprietary private branding.
500+
Power Conversion Models
130+
Global Export Markets
5 Pcs
Low Trial Batch MOQ
100%
Burn-In Load Tested
Procurement Intelligence
Antigua & Barbuda Buyer Technical FAQ
Engineering answers addressing logistics, customs documentation, smart alternator compatibility, and salt corrosion mitigation for commercial buyers in Antigua and Barbuda.
How do Eltrum chargers withstand extreme coastal humidity and salt spray?
Unlike standard RV electronics that rely on conformal coatings, Eltrum waterproof units feature complete silicone or polyurethane resin vacuum potting within die-cast aluminum alloy chassis. This achieves genuine IP67/IP68 hermetic isolation, preventing moist salt-laden maritime air from contacting micro-components, solder joints, or semiconductor packages.
Can your DC-DC chargers handle modern Euro 6 / EPA smart alternators?
Yes. Modern overland vehicles equipped with regenerative braking smart alternators experience voltage drops down to 11.5V or cut out entirely during coasting. Eltrum battery-to-battery (DC-DC) chargers include dedicated ignition sensor inputs that maintain constant bulk CC/CV charging irrespective of alternator fluctuations, preventing starter battery discharge.
What documentation is provided for Customs clearance at St. John's Port or V.C. Bird Airport?
All consignments shipped to Antigua and Barbuda are dispatched with standardized commercial invoices, CE and RoHS certificates of conformity, packing lists, and clean Bills of Lading / Airway Bills. We regularly provide targeted HS tariff code declarations (e.g., 8504.40 for static converters/battery chargers) to expedite customs clearance through the Antigua and Barbuda Customs and Excise Division.
Can you provide custom charging curves for specialized LiFePO4 / LTO packs?
Yes. As the direct OEM manufacturer, our engineering lab in Shenzhen can program customized constant-current / constant-voltage thresholds, absorption timer limits, and float voltages to match your cell manufacturer's precise Battery Management System (BMS) specifications prior to mass production and potting.
What are the minimum order quantities (MOQ) and freight lead times to Antigua?
Our standard model MOQ begins at only 5 units, allowing engineers and marine contractors to validate physical samples on site. Air express shipments (via DHL, FedEx, UPS) typically arrive in Antigua within 5 to 7 business days, while consolidated sea freight to St. John's Port takes approximately 28 to 35 calendar days.
Do Eltrum chargers support dual 110V/220V AC input for imported yachts and US RVs?
Yes. Our AC-DC charger series incorporates active wide-range inputs spanning 90V to 264V AC at 50Hz/60Hz without mechanical switch intervention. Whether connecting to local 230V 50Hz utility grids in St. John's or 110V 60Hz marine pedestal systems in Falmouth Harbour, the charger maintains steady power conversion.
Deploy High-Reliability Power Systems in Antigua and Barbuda
Consult directly with our Shenzhen power engineering team to configure custom voltages, evaluate sample evaluation units, or initiate wholesale distributor procurement with full OEM brand support.