OEM Favorite
Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Input Window: 9V – 36V DC
- Output Voltage: 43.8V CC/CV
- Protection: IP65 Waterproof
- Applications: EV, Golf Cart, Boat
500+
Standard Power Models
IP65/IP68
Sealed Marine Ingress Rating
130+
Export Destinies Worldwide
ISO 9001
Certified Factory QC
Export Product Portfolio
High-Efficiency Power Conversion for the Bahamian Archipelago
Engineered for out-island microgrids, marine propulsion auxiliary systems, luxury golf car fleets, and off-grid solar-storage installations across Nassau, Freeport, and the Family Islands.
High Power
1500W Buck-Boost Converter 10-60V with RS485
- Wide Input: 10V – 60V DC
- Output Select: 12V / 24V / 48V
- Bus Protocol: RS485 Telemetry
- Cooling: Integrated Anodized Sink
Heavy Duty
10–44V to 12V 50A/60A High-Amp Stabilizer
- Input Range: 10V – 44V DC
- Output Current: Up to 60A Cont.
- Peak Power: 720W Output
- Enclosure: Die-cast Alloy
Marine Grade
8–40V to 13.8V 30A Marine Radio Stabilizer
- Input Span: 8V – 40V DC
- Fixed Output: 13.8V DC (Clean)
- Max Current: 30A Constant
- Topology: Synchronous Rectification
Isolated Ground
18–90V to 12V 10A Galvanic Isolated Converter
- Ultra-Wide In: 18V – 90V DC
- Isolation: 1500V DC Galvanic
- Ingress: 100% Epoxy Potted
- Target: Telecom & Marine Comms
B2B Dual Batt
400W Waterproof DC-DC LiFePO4 Charger
- Engine In: 10V – 36V Smart Alt.
- Multi-Stage: Bulk, Absorption, Float
- Efficiency: >95% Conversion
- Ideal For: Yacht Aux Banks & RVs
Solar & Led
12V to 48V 20A Industrial Boost Converter
- Input: 11V – 16V Nominal
- Stepped Bus: 48V Regulated 20A
- Rated Power: 960W Continual
- Housing: Extruded Anti-Corrosion
Fleet Grade
600W Multi-Voltage Waterproof LiFePO4 Charger
- Bank Support: 12V / 24V / 36V / 48V
- Mains Window: 90V – 265V AC Auto
- Enclosure: Fully Sealed IP67
- Use: Resort Carts & Marine Quays
Engineering Whitepaper
Mission-Critical Operating Environments Across the Bahamas
Operating DC conversion hardware in the Commonwealth of The Bahamas presents intense thermodynamic and environmental challenges rarely encountered in continental installations.
Maritime & Yacht Electrical Systems
From private charter vessels touring the Exumas to commercial transport ships docking in Nassau Harbour, onboard dual-battery banks suffer from high alternator voltage drop and deep cranking sag. Eltrum buck-boost regulators provide stable 12V and 24V rails for navigation radars, satellite communications, and bilge telemetry regardless of starter engine loads.
Island Off-Grid Solar & Microgrids
The Family Islands rely heavily on independent distributed solar generation. High solar radiance combined with battery voltage swings between 42V and 58.4V creates instability for sensitive DC LED lighting networks, refrigeration compressors, and water desalination units. Our buck-boost stabilizers preserve exact voltage tolerances under full dynamic loads.
Resort Electric Vehicle & Utility Fleets
Bahamian mega-resorts on Paradise Island and Eleuthera operate extensive 36V, 48V, and 72V golf cart, baggage tug, and utility vehicle fleets. Converting high-voltage lithium traction power to auxiliary 12V outputs for tracking electronics, lighting, and audio equipment demands thermally resilient, non-isolated and isolated step-down modules that never overheat.
Technical Consideration for Tropical Salt Fog: Standard vented converters suffer electrolytic pin corrosion within 6 to 12 months in coastal Bahamian zones. Eltrum provides vacuum-encapsulated polyurethane and thermally conductive epoxy resin potting, achieving IP68 imperviousness to airborne marine moisture and chlorine ions.
Market Dynamics
The Renewable Transition in the Bahamian Energy Landscape
Under the Bahamas National Energy Policy and the ongoing deployment of resilient Family Island solar microgrids backed by international development programs, decentralized power reliability has become a primary commercial objective. Diesel fuel transportation between islands entails significant logistical costs, accelerating investments into commercial LiFePO4 battery infrastructure.
This macro shift has sparked urgent requirements for sophisticated DC power electronics:
- Lithium Chemistry Upgrades: Retrofitting legacy deep-cycle lead-acid banks to Lithium Iron Phosphate (LiFePO4) on vessels and off-grid facilities requires multi-stage DC-DC charging to prevent alternator thermal burnout.
- Decentralized Telecommunications: Hardening cellular base stations against Category 5 hurricanes requires isolated 18–90V wide-input DC-DC modules to isolate lightning ground surges.
- High Ambient Thermal Tolerance: Sustained daytime temperatures above 35°C with high relative humidity require converters rated for uncompromised operation up to 85°C without nuisance thermal derating.
Wide Input Range Tolerance
Accommodating wide fluctuations (8V to 40V, 10V to 60V, and 18V to 90V) is mandatory to sustain fluctuating wind and solar input sources without dropping loads.
Synchronous Rectification
Delivering up to 96% energy conversion efficiency reduces onboard thermal dissipation inside enclosed battery compartments and engine spaces.
Galvanic Isolation Protection
Breaking ground loops between disparate battery systems eliminates common-mode electrical noise across navigational sonar, radar, and VHF transceivers.
Enterprise Strengths
Shenzhen Eltrum Electronic Co., Ltd.
Founded in 2015, Eltrum is a verified high-tech manufacturer specializing in DC-DC converters (buck, boost, buck-boost, isolated), intelligent DC-DC battery chargers, and waterproof AC-DC lithium chargers. Operating from our 3,000m² facility in Hangcheng Avenue, Shenzhen, we control the entire engineering cycle from planar magnetics winding to surface mount technology (SMT) and automated burn-in testing.
With an experienced technical team of 51–100 specialists, we maintain strict compliance with ISO 9001 quality management procedures. Our products hold full CE and RoHS certifications, exporting reliably to distributors and OEMs across North America, Europe, Australia, and the Caribbean basin.
Low Trial MOQ
Standard models dispatch from just 5 units, allowing engineers to test prototypes on-site before scaling.
OEM & ODM Depth
Custom voltage rails, custom current cutoffs, customized potting cases, and buyer-label production.
100% Full Load QC
Every module undergoes elevated temperature burn-in testing to guarantee zero out-of-box defects.
Planar Magnetics
High power density, reduced electromagnetic interference (EMI), and exceptional heat dissipation.
Direct Factory Terms
T/T, PayPal, Escrow accepted with FOB Shenzhen or CIF Nassau ocean and air freight logistics.
Selection Matrix
Selecting the Correct DC-DC Architecture
Choosing improper power topologies often causes unexpected system cutoffs under severe battery depletion. Use this engineering comparison to align your electrical requirements.
TOPOLOGY 01
DC Buck Converter
Rule: Vin > Vout + Headroom.
Ideal for stepping down 24V marine banks to 12V cabin lighting, or dropping 48V/72V golf cart traction power to 12V/24V accessory circuits at up to 96% efficiency.
TOPOLOGY 02
DC Boost Converter
Rule: Vin < Vout Always.
Raises 12V starter alternator voltages to 24V or 48V for bow thrusters, heavy winches, electric trolling motors, and remote water pumping systems.
TOPOLOGY 03
Buck-Boost Converter
Rule: Vin crosses Vout window.
Essential when operating from batteries that fluctuate from 9V (under severe cranking) to 14.6V (during peak solar charging) while driving a precision 12.0V or 13.8V payload.
TOPOLOGY 04
Galvanic Isolated
Rule: Complete Ground Separation.
Required where input negative and output negative must not share common chassis ground, eliminating ground-fault loops and stray galvanic corrosion in boat hulls.
Frequently Asked Questions
Procurement & Technical Queries for Bahamian Importers
Answers to common questions regarding customs clearance, maritime waterproofing, lithium compatibility, and supply chain logistics.
Why is a Buck-Boost converter preferred over a standard Buck regulator in marine vessels?
A standard 12V marine battery fluctuates between 10.5V (discharged under load) and 14.6V (while being charged by alternators or solar MPPT controllers). A Buck-only regulator requires the input voltage to remain higher than the target output. If your marine radar or GPS requires a strictly regulated 12.0V or 13.8V rail, a standard buck unit will shut off or pass unstable undervoltage when the battery dips below 12V. A Buck-Boost automatically transitions between stepping up and stepping down, ensuring seamless, uninterrupted power.
How do Eltrum converters prevent corrosion caused by Caribbean salt mist?
Our marine-targeted converter lines utilize an environmentally sealed anodized aluminum housing filled entirely with an industrial-grade, flame-retardant silicone or epoxy resin compound. This completely isolates active surface-mount components, planar transformers, and solder traces from humid, salt-laden ambient air (IP65 to IP68 rating), preventing the rapid oxidation common in coastal applications.
Can these DC-DC converters charge LiFePO4 batteries directly from an alternator?
Yes. Direct connection of an engine alternator to a lithium bank can burn out standard boat alternators because lithium batteries accept unrestricted charging currents. Our dedicated DC-DC battery chargers (e.g., 12V to 14.6V and 12V to 43.8V models) manage input current, preventing alternator burnout while providing a controlled Constant Current / Constant Voltage (CC/CV) absorption profile with automatic shutoff to safeguard the lithium cells.
What are the minimum order quantities (MOQ) and lead times for shipping to Nassau or Freeport?
Standard models have a minimal MOQ of just 5 units, allowing engineering teams to evaluate samples with ease. High-power units (over 1000W) can be ordered starting from 1 to 2 units. Lead times for standard inventory samples are 3 to 7 business days, while volume OEM orders are typically fulfilled in 15 to 25 days. Shipments can be arranged via express air courier directly to Lynden Pindling International Airport (NAS) or ocean freight consolidated via forwarders in Miami/Fort Lauderdale directly to Nassau or Freeport docks.
Does Shenzhen Eltrum Electronic support custom input/output voltages and buyer labeling?
Yes. We offer complete OEM/ODM services. Our engineering team can adjust input voltage windows, output voltages (e.g., non-standard 15V, 19V, 28V, or 58.4V), peak current capacities, cable harnesses, and implement RS485 communication protocols. Private buyer-label packaging and silkscreen brand printing are readily supported for Bahamian equipment distributors and marine contractors.
Which payment terms and international quality certifications apply?
We operate under an ISO 9001 certified quality management system. All converter and charger series comply with CE, FCC, and RoHS standards. For international commercial orders, we accept T/T bank transfers, PayPal, and Escrow in USD or CNY, based on FOB Shenzhen or EXW delivery terms with full export documentation provided for local customs clearance in The Bahamas.
Upgrade Your Power Conversion Infrastructure in the Bahamas
Whether you require custom buck-boost voltage stabilization for an island microgrid, isolated converters for marine communications, or volume fleet charging solutions, our Shenzhen engineering team is ready to assist with rapid sample delivery and complete technical datasheets.