Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Input Voltage: 12V DC (9–16V)
- Output Voltage: 43.8V CC/CV (13A)
- Ingress Rating: IP67 Waterproof
- Application: EV, RV, E-Bike
Featured Dual Battery Chargers & High-Current Converters
Engineered to handle alternating charging loads, deep discharge recovery, and demanding alternator environments. Verified for direct supply across Zagreb municipal retrofits, commercial fleets, and coastal marine builds.
600W Waterproof LiFePO4 Charger 14.6V–58.4V
- Input Supply: 90–265V AC Universal
- Nominal Charge: 14.6V / 29.2V / 58.4V
- Thermal Control: Sealed Die-Cast Alum
- Safety: Short/Over-temp/OVP
Multi-Bank 600W Boat & Commercial EV Charger
- Supported Voltage: 12V / 24V / 36V / 48V
- Battery Target: LiFePO4 / Lead-Acid
- Efficiency: > 94%
- Mounting: Heavy-Duty Flange
400W DC-DC Dual Battery Isolator Charger
- Input Range: 10–36V DC Smart Alt
- Regulated Charge: 14.6V / 29.2V / 43.8V
- Charge Logic: CC/CV Multi-Stage
- Housing: Fully Potted Silicone
1500W Buck-Boost Converter with RS485 Bus
- Input Dynamic: 10–60V Ultra-Wide
- Output Channels: 12V / 24V / 28V / 48V
- Digital Control: RS485 Telemetry
- Max Output: 1500W Continuous
300W Compact Marine LiFePO4 Dual Charger
- Input Connection: EU / UK / US / AU Plugs
- Charge Output: 14.6V / 29.2V / 58.4V
- Protection: Reverse Polarity Guard
- Form Factor: Compact Lightweight
18–90V to 12V 10A Galvanic Isolated Converter
- Input Voltage: 18–90V Wide Window
- Isolation: Complete Ground Decoupling
- Output Power: 12V @ 10A (120W)
- Certifications: CE, RoHS Certified
12V to 48V Step-Up Boost Dual Battery Converter
- Bus Architecture: 12V Starter to 48V Bank
- Output Current: 12.5A / 15A / 20A
- Enclosure: IP68 Potted Aluminum
- Efficiency: Up to 96%
Dual Battery Topologies: Overcoming Alternator Sag & Cross-Chemistry Demands
Modern Euro 6/6d vehicle fleets widely used throughout Croatia's transport and utility corridors feature intelligent, regenerative braking alternators. While these systems optimize fuel economy, they drop alternator charging rails below 12.3V during deceleration coasting, causing standard lead-acid split-charge relays to prematurely disengage and fail to charge auxiliary banks.
Our OEM DC-DC battery-to-battery chargers bridge this gap by decoupling the primary starting battery from the house auxiliary bank. Incorporating adaptive buck-boost architecture, the charger accommodates wild voltage fluctuations (9V to 36V) while regulating an uninterrupted Constant Current / Constant Voltage (CC/CV) absorption profile tailored specifically for LiFePO4 cells (14.6V per 4S string). This eliminates destructive over-current draws on factory alternators and shields sensitive secondary navigation and telemetry electronics from voltage spikes.
Localized Implementations Across the Zagreb Industrial Corridor
As Croatia's commercial heart, Zagreb sits at the crossroads of European TEN-T logistics, central manufacturing, and serves as the strategic outfitting staging ground for the Adriatic maritime market.
Commercial Fleet & Logistics Hubs
Distribution fleets based out of Zagreb's surrounding logistical hubs (Jastrebarsko, Sveta Nedelja, and Velika Gorica) rely on our 24V-to-12V and 12V-to-12V isolated dual battery systems to continuously operate GPS tracking, tail-lift power packs, and hydraulic refrigeration equipment without draining base vehicle starter cells.
Adriatic Marine Outfitting & Yacht Staging
Zagreb serves as Croatia's central administrative and engineering staging ground for maritime electrical integration. Our IP67/IP68 potted multi-chemistry dual battery chargers are routinely spec'd for luxury charter catamarans and fishing vessels requiring galvanic isolation between bronze hull earth grounds and alternating engine battery banks.
Municipal Utility & Emergency Vehicles
Specialty utility conversion workshops in northern Croatia integrate Eltrum 400W–1500W voltage stabilizers into police, ambulance, and fire apparatus. These units isolate sensitive radio communications and digital sirens from extreme cranking transients during vehicle start-up cycles.
Energy Transition & Electrification Trends in the Croatian Market
Strategic demand shifts shaping procurement priorities across local engineering procurement firms.
Aggressive LiFePO4 Transition
Croatian maritime and commercial vehicle upfitters are rapidly phasing out AGM and flooded lead-acid house banks in favor of high-energy-density LiFePO4. This shift demands dedicated multi-stage CC/CV DC-DC chargers capable of providing safe, steady current regulation without relying on raw alternator voltage.
Euro 6d Smart Alternator Saturation
With strict EU emissions mandates standard across newly registered commercial vehicles in Croatia, traditional voltage-sensitive relays (VSRs) have become obsolete. System integrators require wide-input (8V–36V) buck-boost chargers that sustain target charging voltages even when engine alternators enter zero-output fuel economy modes.
Demand for Digital Telemetry (RS485/CAN)
Smart city initiatives in Zagreb and remote asset management platforms across central European transit systems increasingly mandate real-time battery status reporting. Our RS485-enabled charging units integrate directly into vehicle IoT modems for continuous thermal, voltage, and current monitoring.
Stringent Maritime IP67 Waterproofing
Given the rigorous environmental conditions along the Adriatic coast, components specified via Zagreb procurement offices require IP67/IP68 potted aluminum housings that withstand salt spray, severe vibration, and ambient engine-room operating temperatures reaching +85°C.
Dual Battery Charger Topology Comparison for Integrators
Evaluate topologies against your mechanical packaging and electrical distribution constraints.
| Architecture Type | Operational Input Range | Regulated Charging Target | Galvanic Isolation | Ideal Deployment Scenario |
|---|---|---|---|---|
| Non-Isolated Buck-Boost | 8V – 40V DC | 12V / 14.6V / 24V / 29.2V | Common Ground | Standard campervans, delivery vans, shared chassis negative returns. |
| Full Galvanic Isolated Charger | 18V – 90V DC | 12V / 24V / 48V (Custom CC/CV) | > 1500V DC Isolation | Marine alloy vessels, telecom cabinets, electric forklifts, mine equipment. |
| High-Power Boost Step-Up Charger | 10V – 28V DC | 28V / 43.8V / 58.4V | Direct Bus Step-Up | Charging 36V/48V e-mobility or trolling motor banks directly from 12V alternators. |
| Universal AC-DC Fleet Charger | 90V – 265V AC | 14.6V – 58.4V (Up to 1000W) | Mains Transformer Isolated | Depot shore-power charging, warehouse industrial AGV dock facilities. |
Shenzhen Eltrum Electronic Co., Ltd.
Established in 2015, Shenzhen Eltrum Electronic operates from our verified manufacturing facility in the Anle Industrial Zone, Hangcheng Street, Shenzhen. Our specialized engineering teams have designed and fabricated over 500 standardized and custom power conversion models—spanning buck, boost, isolated buck-boost converters, and intelligent waterproof LiFePO4 battery chargers.
With quality management certified under ISO 9001 and full product compliance across CE and RoHS directives, Eltrum functions as the direct OEM/ODM manufacturing engine for clients in over 130 countries. We provide Zagreb and Southeast European procurement teams with tailored buyer-label manufacturing, custom CNC or extruded aluminum tooling, programmable charging algorithms, and direct technical support straight from our test benches.
ISO 9001 Certified
CE EMC/LVD Compliant
RoHS Compliant
Custom Firmware Profiles
Burn-in 100% Load Tested
Zagreb Procurement FAQ: OEM Dual Battery Chargers
Direct technical and logistical clarifications answering the primary inquiries of regional engineers and supply chain buyers.
How does Eltrum support DDP shipping and customs clearance into Zagreb and Croatia?
We support standard FOB, EXW, and CIF sea/air freight through Rijeka Port or Franjo Tuđman Airport (Zagreb), as well as direct door-to-door Delivered Duty Paid (DDP) multimodal express solutions. We provide complete EU customs documentation, including CE Declaration of Conformity (DoC), RoHS test certifications, commercial invoices, and harmonized system (HS) customs codes to ensure frictionless entry without import delays.
What is the minimum order quantity (MOQ) for custom OEM charging curves or buyer labels?
For standard catalog products, our MOQ starts from just 5 units, enabling engineering validation before volume scaling. For customized buyer-label branding, customized output voltage setpoints (e.g., custom 14.4V, 14.6V, or 43.8V curves), or custom length wiring harnesses with Anderson/Deutsch connectors, our typical production MOQ is 50 to 100 units.
Why must an isolated DC-DC charger be used in marine vessels instead of standard common-ground units?
In marine installations along the Croatian coast, metal hulls or shared negative ground returns can create severe galvanic corrosion loops when connecting distinct battery banks across engine blocks and auxiliary electrical networks. Our isolated series provides greater than 1500V DC optical and magnetic isolation between input and output rails, protecting vessel electronics and preventing galvanic hull pitting.
How do your chargers handle Euro 6 smart alternators with regenerative braking?
Our DC-DC dual battery chargers feature built-in wide-input voltage buck-boost stabilization. Even when the smart vehicle alternator drops down to 10V or 11V during coasting cycles, or spikes to 15.5V during active regenerative braking, the internal switching circuitry automatically regulates the auxiliary output at the precise programmed charging voltage without dropping out.
Can charging profiles be fine-tuned for different LiFePO4 BMS parameters?
Yes. Through our OEM design services, our engineering department pre-configures bulk absorption, constant current, and float voltages to integrate seamlessly with your preferred BMS threshold cutoffs, avoiding nuisance over-voltage shutoffs commonly triggered by off-the-shelf, non-regulated charging equipment.
Ready to Integrate Eltrum Dual Battery Chargers into Your Fleet or Marine Platform?
Whether you require evaluation samples for fleet testing in Zagreb, customized 1500W buck-boost modules with RS485 communication, or volume OEM production, our power electronics engineering team is prepared to assist.