Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Input Voltage10V – 16V DC
- Output Charging43.8V @ 13A CC/CV
- EnclosureIP67 Sealed Alloy
OEM & Industrial Solutions
Engineered Battery Charging & Power Modules
From Trondheimsfjorden aquaculture workboats to zero-emission construction machinery in Trøndelag, Eltrum provides heavy-duty, temperature-resilient, and intelligent charging topologies.
600W Waterproof AC-DC LiFePO4 Smart Charger
- Grid Input90V – 264V AC Mains
- Configurable Output14.6V / 29.2V / 58.4V
- Efficiency≥ 93.5% Typical
400W DC-DC Battery-to-Battery LiFePO4 Charger
- Input Voltage10V – 36V DC Step-Up
- Charge Regulation14.6V / 29.2V Dual Profile
- ProtectionAlternator Over-Drain
300W Marine AC-DC Lithium Charger (EU / Schuko)
- Input ProtectionSurge, Low Temp Inhibit
- Terminal Voltage14.6V / 29.2V / 43.8V
- Ingress RatingIP65 Anodized Shell
1500W Wide-Input Buck-Boost DC Stabilizer & Charger
- Dynamic Input10V – 60V Continuous
- Regulated Output12V / 24V / 48V (Adjustable)
- TelemetryRS485 Modbus RTU
Isolated DC-DC Auxiliary Converter 18–75V to 24V
- Isolation Rating1500V DC Galvanic
- Continuous Output24V @ 5A (120W)
- ApplicationMarine Nav & Telecom
24V to 12V 100A Heavy Vehicle Step-Down Converter
- Input Range18V – 35V DC
- Output Power12V DC @ 100A (1200W)
- Efficiency96% Synchronous Rect.
Custom OEM Multi-Chemistry Low-Temp Charger Module
- Chemistry OptionsLiFePO4, LTO, NMC, AGM
- Custom InterfacesCAN Bus 2.0B / RS485
- Thermal Range-40°C to +85°C Certified
500+
Standard Power Models
130+
Countries Supplied
ISO 9001
Audited Manufacturing
5 pcs
Low OEM Validation MOQ
Engineering LiFePO4 and DC Conversion Modules for Norway's Harsh Marine & Industrial Climate
The Trøndelag county, anchored by the engineering capital of Trondheim, is globally recognized as the focal point for Scandinavian maritime technology, autonomous oceanic research, and electrification. Operating electronic power conversion equipment in central Norway presents severe environmental challenges that standard off-the-shelf modules fail to handle. Designers face sustained sub-zero ambient temperatures, aggressive maritime saltwater fog along the Trondheimsfjord, broad voltage fluctuations caused by regenerative energy on small grid ties, and high vibrational profiles from commercial aquaculture workboats and electrified utility machinery.
Shenzhen Eltrum Electronic Co., Ltd. fills this mission-critical gap. With over a decade of dedicated research into isolated DC-DC topology, high-voltage stepping, and multi-stage constant current/constant voltage (CC/CV) battery regulation, our modules are engineered to thrive where ordinary commercial electronics fail. Whether integrating a Smart 36V Lithium Battery Charger DC 12 Volt to DC 43.8 Volt Waterproof Charger 13A into an electric runabout or engineering a distributed 48V telecom back-up bank in an unheated mountain cabinet near Oppdal, Eltrum supplies tier-one components built to international maritime and industrial standards.
1. The Sub-Zero Lithium Dilemma: Low-Temperature Charging Intelligence
A widely recognized vulnerability of Lithium Iron Phosphate (LiFePO4) chemistry is its physical inability to accept continuous charge currents at temperatures below 0°C without suffering severe lithium dendrite plating, which irrevocably damages cell internal impedance and introduces thermal runway hazards. For OEMs operating out of Trondheim, charging house batteries or propulsion packs in sub-zero winter conditions requires sophisticated multi-stage algorithm execution.
Eltrum's advanced DC-DC and AC-DC battery charger modules feature optional temperature telemetry integration via negative temperature coefficient (NTC) probes or RS485/CAN-Bus digital handshakes. When integrated with intelligent battery management systems (BMS), our chargers automatically throttle terminal charge rates to a trickle current or trigger external silicon pre-heating blankets before ramping into full Constant Current (Bulk) phase. Our potted alloy housings provide superior thermal mass, dispersing heat efficiently during full-load high-efficiency switching (typical efficiency exceeds 93–96%), ensuring system reliability during freezing sea sprays and extreme Nordic wind chills.
2. Solving Alternator Overheating with Smart DC-DC Topologies
A frequent field failure encountered in Norwegian maritime retrofits and hybrid utility vehicles is alternator burnout when connecting a LiFePO4 auxiliary battery directly to an internal combustion engine's standard starter alternator. Traditional alternators are designed to charge lead-acid batteries, which possess inherently higher internal resistance that naturally restricts current acceptance as voltage climbs. LiFePO4 cells have nearly zero internal DC resistance, soaking up all available current from the alternator even at idle RPMs where the engine fan cannot adequately cool the alternator coils.
Eltrum's Battery-to-Battery (B2B) DC-DC Chargers resolve this fundamental vulnerability. Operating with broad input windows (such as 10V–36V or 18V–90V), the charger acts as a galvanic barrier or precise switching current buffer, drawing only a calibrated, regulated current from the starter battery/alternator network while outputting the exact tailored CC/CV curve (e.g., 14.6V for 12V LiFePO4, 29.2V for 24V packs, and 43.8V for 36V packs). This keeps commercial engines operating cleanly while guaranteeing rapid, safe house battery replenishment.
Power Conversion Architecture: Selecting the Proper Topology
Choosing the correct power architecture is vital for system lifetime and operational stability. The table below illustrates the critical parameters analyzed by marine electrical contractors and automation engineers when sourcing Eltrum power conversion hardware.
| Topological Structure | Standard Input Range | Nominal Outputs | Target Trøndelag Application | Efficiency Benchmark |
|---|---|---|---|---|
| Buck-Boost (Voltage Stabilizer) | 8V – 40V / 10V – 60V DC | 12V, 13.8V, 24V, 48V | Campervans, trawlers, fluctuating solar buffers | 92% – 95% |
| Isolated Step-Down DC-DC | 18V – 75V / 36V – 75V DC | 5V, 12V, 24V | Marine sonar, subsea sensors, telecom racks | 88% – 92% |
| High-Current Buck (Step-Down) | 24V, 48V, 72V, 90V DC | 12V (up to 100A), 24V | Heavy forestry equipment, electric bus auxiliary | 95% – 97% |
| Step-Up Boost Converter | 10V – 16V / 18V – 30V DC | 24V, 36V, 48V | 48V hybrid electric thrusters, high-power deck lights | 93% – 96% |
| AC-DC Waterproof Charger | 90V – 265V AC Universal | 14.6V, 29.2V, 43.8V, 58.4V | Dockside shore power, electric marina chargers | 91% – 94% |
Localized Deployment
Mission-Critical Applications in the Trondheim Region
From university research vessels testing in the ocean laboratory to heavy-duty industrial transport traversing mountain corridors, Eltrum supplies rugged power modules built for Nordic conditions.
Maritime & Aquaculture Workboats
Trondheim's leading salmon farming and marine logistics fleets demand robust IP67-rated power gear. Eltrum's potted AC-DC chargers and 24V-to-12V heavy-duty buck converters power onboard telemetry, fish-feeding actuators, navigational radars, and lithium house packs without succumbing to humid, salty sea spray.
Overland Commercial Vans & RV Expeditions
Expedition campers and tradesmen operating in Norway face severe battery sagging during cold starts. Our B2B DC-DC chargers and voltage stabilizers maintain an unyielding 13.8V or 14.6V rail to sensitive heating pumps, satellite communication, and auxiliary battery banks while engine alternators cycle.
Zero-Emission Construction & Mining
Trondheim Municipality's aggressive green procurement criteria mandates fossil-free construction sites. Eltrum's 48V to 12V and 72V to 24V high-power modules step down heavy traction pack power to supply auxiliary lights, safety PLCs, hydraulic controllers, and electric cabin climate controls.
Off-Grid Sub-Arctic Renewable Storage
Remote cabins (hytter) and environmental monitoring stations across Trøndelag rely on wind and solar DC microgrids. Our wide-input buck-boost converters bridge seasonal fluctuations, ensuring stable voltage output to high-precision environmental sensors and remote radio relays year-round.
Autonomous Marine Drones & NTNU Robotics
Collaborating with local technology clusters and academic innovators like NTNU, Eltrum supplies lightweight, isolated DC-DC converters for autonomous surface vessels (ASVs) and subsea exploration drones requiring galvanic isolation to eradicate high-frequency motor noise and eliminate ground loop interference on sensitive sonar.
Industry Insight
Electrification Trends Shaping the Trøndelag Tech Hub
The transition toward absolute zero emissions across Central Norway is accelerating the requirements for next-generation DC-DC power electronics and smart charging topologies.
1. Shore-to-Ship Hybridization
With strict emission controls entering Norwegian fjords, commercial ferries, supply boats, and fishing cutters are retrofitting hybrid battery power. This transition demands high-amperage IP65 battery chargers capable of accepting erratic shore power variations while managing precision absorption profiles to maximize cycle life.
2. Wide-Bandgap GaN and SiC Integration
OEMs in Trondheim are pushing for higher power densities within ultra-compact form factors. The adoption of Gallium Nitride (GaN) and Silicon Carbide (SiC) semiconductors in DC-DC converters is enabling Eltrum to achieve switching efficiencies beyond 96%, drastically reducing enclosure footprint and passive thermal heat sink bulk.
3. Digital RS485 / CAN-Bus Fleet Telemetry
Modern Norwegian fleet managers expect real-time diagnostic reporting. Converters are no longer passive black boxes; our advanced models feature embedded RS485 Modbus RTU communication, allowing remote logging of input voltage health, continuous amperage throughput, thermal status, and automated fault alerts.
Verified Manufacturing
Why Trondheim OEMs & System Integrators Partner with Eltrum
Shenzhen Eltrum Electronic Co., Ltd. combines rigorous ISO 9001 quality management with direct engineering agility, delivering proven reliability across international markets.
Full CE & RoHS Compliance
All converter and charger architectures strictly adhere to European electromagnetic compatibility (EMC) standards and low-voltage directives. Safety certifications, component tracing, and test declarations are provided directly with pre-production samples.
Deep OEM & ODM Customization
Need a dedicated 43.8V LiFePO4 charging curve, custom Anderson connectors, IP68 vacuum potting, or tailored aluminum extrusion dimensions? Our in-house R&D engineering department handles full hardware, firmware, and buyer-label customizations.
Low MOQ for Engineering Prototypes
To support early-stage bench testing and marine pilot trials, standard and semi-custom catalog models are accessible with an introductory MOQ starting from just 5 units. Engineers can thoroughly validate hardware before committing to full container batches.
Consult with Eltrum Power Engineers Today
Share your target voltage input, required load parameters, environmental constraints, or custom CC/CV curve specifications. Our Shenzhen technical team will respond with a tailored proposal and complete datasheet package within 24 business hours.
Procurement & Technical Support
Frequently Asked Questions in the Trondheim Market
Direct technical answers to common questions raised by electrical contractors, shipwrights, and industrial purchasing managers across Norway.
Can Eltrum battery chargers safely operate in unheated sub-zero winter temperatures in Trøndelag?
Yes. Our industrial-grade and marine battery chargers are constructed with wide-temperature electronic components certified from -40°C to +85°C. For lithium (LiFePO4) systems, our chargers can be integrated with external NTC thermistors or configured via RS485 communication to prohibit charging when ambient cell temperatures drop below 0°C, avoiding lithium plating while maintaining safe auxiliary operation.
What is the difference between a standard DC-DC buck converter and a DC-DC battery charger?
A standard buck converter is a constant-voltage power supply; if hooked directly to a depleted battery, it will attempt to supply maximum amperage until it overheats or trips its over-current protection. In contrast, an Eltrum DC-DC Battery Charger features true multi-stage Constant Current / Constant Voltage (CC/CV) charging control. It safely limits current during bulk charge, steps down during absorption, and manages float/shutdown profiles tailored to LiFePO4, AGM, or Lead-Acid chemistries.
Are Eltrum waterproof power modules resilient against maritime saltwater corrosion?
Absolutely. Our waterproof series (including the Smart 36V 13A charger and 600W/1000W AC-DC units) utilize high-grade aluminum die-cast housings sealed with thermal epoxy resin under vacuum potting (IP65 to IP67 rated). The exterior enclosures feature anti-corrosion anodized and powder-coated treatments specifically suited for coastal North Sea and fjord exposure.
What payment, currency, and international shipping terms are available for Norwegian buyers?
We regularly process international commercial orders via T/T wire transfer, PayPal, and verified Escrow services in USD or EUR. Shipments to Norway can be arranged via express air courier (DHL, FedEx, UPS) for rapid prototyping within 4–7 business days, or via consolidated ocean freight (FOB Shenzhen or CIF Oslo/Trondheim) for volume production containers.
Can we request custom DC voltage inputs and customized charging algorithms for specialized EV packs?
Yes. Customization is one of our primary core competencies. Shenzhen Eltrum Electronic Co., Ltd. provides OEM and ODM design services. We can customize input voltage spans (such as ultra-wide 18V–90V inputs), modify charging cutoff thresholds (e.g., 43.8V, 54.6V, 58.4V), integrate customer-specified harness connectors (Deutsch, Anderson, M12), and implement specialized communication protocols via RS485 or CAN-Bus.
When is galvanic isolation mandatory when installing DC-DC converters on marine vessels?
Galvanic isolation is strictly recommended on aluminum and steel-hulled vessels to separate DC system grounds and prevent catastrophic electrolytic hull corrosion caused by ground leakage currents. Isolated converters are also critical when powering sensitive navigational electronics, hydroacoustic sonars, and radio transmitters to prevent high-frequency electrical ground noise generated by electric winches, bow thrusters, or engine alternators from feeding into communication buses.