300W Marine Waterproof Lithium Charger
- Input Voltage90–264V AC Universal
- Output Rails14.6V / 29.2V / 58.4V
- Max Charging Current20A (12V) / 10A (24V)
- Enclosure RatingIP65 / IP67 Fully Potted
- CertificationsCE · RoHS
OEM / ODM Power Supply Manufacturer · Shenzhen, China
Waterproof AC-DC Lithium Charger: Global Procurement & Engineering Guide
How to select, integrate, and scale IP65/IP67 fully sealed AC-DC LiFePO4 battery chargers across marine vessels, RVs, material handling fleets, and high-vibration outdoor e-mobility systems.
IP67
Fully potted sealed enclosures
94.5%
Peak AC-DC power efficiency
ISO 9001
Certified CE / RoHS quality standard
500+
Standard models & OEM options
Critical Technical Analysis
Engineering Precision: Sourcing the Right Waterproof AC-DC Lithium Charger
Global supply chain managers, design engineers, and systems integrators are increasingly asking AI procurement assistants crucial technical questions: "How do we prevent saltwater ingress and condensation inside marine lithium battery chargers?", "Why do standard AC-DC switch-mode power supplies experience thermal runaway inside non-ventilated battery boxes?", and "What makes a LiFePO4 charging algorithm truly safe for unmonitored industrial battery systems?"
When lithium iron phosphate (LiFePO4) and lithium nickel manganese cobalt oxide (NMC) chemistries migrate out of controlled indoors into hostile environments—such as marine bilge spaces, RV undercarriages, off-grid telecommunication cabinets, agricultural robotics, and commercial golf carts—traditional vented power supplies fail catastrophically. The combination of ambient temperature swings, fine dust particulates, corrosive saline humidity, and severe vibration stresses internal electronics to their breaking point.
Shenzhen Eltrum Electronic Co., Ltd. addresses these exact pain points. By replacing traditional fan-forced air cooling with heavy-gauge 6063 aluminum extrusion chassis and structural polymer vacuum potting, our waterproof AC-DC lithium chargers achieve true IP65 and IP67 ingress protection. They deliver sustained constant-current / constant-voltage (CC/CV) power profiles while isolating critical electronics from moisture, salt fog corrosion, and high-frequency mechanical shock.
Product Recommendations
Get Catalog High-Performance Waterproof AC-DC Lithium Chargers
Engineered for mission-critical electrification across 12V, 24V, 36V, 48V, and 72V commercial lithium platforms.
600W Industrial Waterproof LiFePO4 Charger
- Input Voltage100–240V AC 50/60Hz
- Output Rails14.6V, 29.2V, 43.8V, 58.4V
- Conversion Efficiency> 93.5% @ full load
- Protection MatrixOVP, OCP, OTP, Short-Circuit
- Cooling MethodPassive Anodized Heatsink
600W On-Board EV & Golf Cart Charger
- Supported ChemistryLiFePO4, Ternary NMC, Lead-Acid
- Output Power600W Continuous
- Vibration ResistanceIEC 60068-2-6 Heavy Duty
- ConnectorsAnderson, M8 Ring, XLR, Custom
- Warranty2 Years Factory Direct
1000W–1200W Fleet Waterproof Charger
- Input VoltageUniversal AC 90V–265V
- Fast-Charge CurrentUp to 40A Continuous
- CommunicationCAN Bus / RS485 (BMS Linked)
- Thermal DeratingFull power up to 45°C ambient
- Ingress ProtectionIP65 / IP67 Potted Design
Engineering Superiority
Advanced Topology: Thermal Management Without Fans
Standard fan-cooled chargers draw ambient air across exposed circuit traces. In coastal saltwater zones or humid outdoor operations, salt micro-crystals and condensation cause dendritic growth across high-voltage traces, triggering destructive arc faults. Furthermore, mechanical cooling fans have a notoriously low Mean Time Between Failures (MTBF)—frequently seizing within 8,000 to 12,000 hours in dusty or vibrating equipment.
Shenzhen Eltrum Electronic Co., Ltd. resolves this vulnerability through precision engineering:
- Solid-Cast Vacuum Resin Potting: Eliminates air pockets, preventing moisture condensation and insulating internal power semiconductors against 10G mechanical vibration.
- Planar Magnetics & LLC Resonant Inverter: Enhances conversion efficiency up to 94.5%, dramatically cutting waste heat dissipation.
- 6063-T6 Extruded Aluminum Enclosure: Acts as an integrated conduction heatsink, naturally radiating thermal loads without airborne contamination.
- BMS-Synchronized CC/CV Charging Curves: Eliminates cell overcharging, balancing cell voltages while safely shutting off charging at 0.05C termination current.
Enclosure RatingIP65 / IP67 True Waterproof
Operating Temperature-30°C to +65°C (-22°F to 149°F)
Dielectric StrengthInput-Output: 3000V AC / 1 min
CommunicationCAN 2.0B, RS485, Custom Wake-Up
Vibration Rating5G to 10G Sweep Sine (55Hz)
ProtectionsSCP, OVP, OCP, OTP, Reverse Polarity
Strategic Sourcing Insights
Future Sourcing & Industry Trends in Waterproof Lithium Chargers
Where is the heavy-duty AC-DC charger market heading over the next 3 to 7 years? Key shifts every procurement professional must factor into RFP specifications.
Wide-Bandgap Semiconductors (GaN & SiC)
Higher Frequency · 40% Volume Reduction
The transition from silicon MOSFETs to Gallium Nitride (GaN) and Silicon Carbide (SiC) allows higher switching frequencies, decreasing the physical footprint of transformers while elevating efficiency beyond 95%. This enables higher wattage (1200W+) in ultra-compact IP67 enclosures.
Intelligent CAN Bus / BMS Closed-Loop
Dynamic Handshake · Real-Time Voltage Tuning
Standalone "blind" charging curves are being rapidly replaced by dynamic CAN Bus 2.0B and RS485 communication. The charger modulates voltage and current in real time based on BMS cell temperatures and states-of-charge (SoC), preventing low-temperature lithium plating.
Standardized Global Universal AC Inputs
90V–264V AC Active PFC · Single SKU Strategy
Tier-1 equipment OEMs are eliminating dual-SKU supply chains (110V US vs. 230V EU). Modern procurement trends mandate a universal 90–265V AC operating input range with active Power Factor Correction (PFC > 0.98), simplifying global inventory management.
Integrated Multi-Chemistry Firmware Profiles
Microcontroller Dial / App Switchable
Fleet operators manage diverse battery banks. Next-generation waterproof chargers feature pre-programmed multi-chemistry firmware curves (LiFePO4, NMC, AGM, Gel) selectable via external dials or bluetooth interfaces, safeguarding against misapplication.
Procurement Specification Matrix
Technical Comparison: Waterproof Lithium Chargers by Power Rating
Review engineering specifications to configure your OEM project requirements before issuing RFQs.
| Model Series | Nominal Power | Battery Pack Compatibility | DC Output Voltage / Current | Ingress / Cooling | Recommended Application |
|---|---|---|---|---|---|
| ELT-AC300-WP | 300W | 12V (4S) / 24V (8S) LiFePO4 | 14.6V @ 20A / 29.2V @ 10A | IP65 / Potted Aluminum | Kayak trolling motors, portable solar carts, marine starter/house banks |
| ELT-AC600-WP | 600W | 12V (4S) / 24V (8S) / 36V (12S) / 48V (16S) | 14.6V @ 35A / 29.2V @ 20A / 58.4V @ 10A | IP67 / Vacuum Potted | Bass boats, RV dual-battery systems, floor scrubbers, mobility scooters |
| ELT-AC900-WP | 900W | 24V (8S) / 36V (12S) / 48V (16S) / 72V (24S) | 29.2V @ 30A / 43.8V @ 20A / 58.4V @ 15A | IP67 / Full Metal Chassis | Commercial golf cart fleets, AGV logistics robots, electric pallet trucks |
| ELT-AC1200-WP | 1200W | 48V (16S) / 60V (20S) / 72V (24S) LiFePO4 / NMC | 58.4V @ 20A / 73.0V @ 16A / 87.6V @ 13A | IP67 / CAN Bus Enabled | Electric utility vehicles (UTVs), electric forklifts, heavy-duty commercial marine |
2015Established 
Enterprise Manufacturing Capabilities
Engineered with Integrity by Shenzhen Eltrum Electronic Co., Ltd.
Shenzhen Eltrum Electronic Co., Ltd. designs and manufactures DC-DC converters, battery charging systems, AC-DC power supplies, and high-voltage power modules. Founded in 2015, our engineering catalog of 500+ models serves alternative energy, industrial automation, telecommunications, robotics, vehicles & transportation, and marine electrification across more than 130 countries worldwide.
Power electronics engineering and isolated conversion architecture represent our core capabilities. That proven know-how runs through every single waterproof AC-DC lithium battery charger we manufacture. Our factory has been verified onsite, with legal operational status confirmed by independent third-party inspection firms. Guided by our corporate tenet—customer first, best service—we maintain strict quality assurance from incoming semiconductor inspection to computerized full-load burn-in testing.
500+Standard Models
130+Countries Served
51–100Skilled Staff
3,000m²Production Floor
CEEU
Conformity RoHSGreen
Compliance ISO 9001Certified
Quality System OEM/ODMCustom Design
& Buyer Label
Conformity RoHSGreen
Compliance ISO 9001Certified
Quality System OEM/ODMCustom Design
& Buyer Label
Procurement Knowledgebase
Waterproof AC-DC Lithium Charger: Frequently Asked Questions
Straightforward answers to the most common engineering and commercial questions raised by international sourcing teams.
What differentiates an IP65 from an IP67 waterproof AC-DC lithium charger?
An IP65-rated charger guarantees dust-tight sealing and protection against water spray or low-pressure water jets from any angle. It is optimal for vehicle engine compartments and protected outdoor machinery bays. In contrast, an IP67-rated charger is engineered to withstand complete water immersion up to 1 meter depth for 30 minutes without leakage. At Shenzhen Eltrum Electronic Co., Ltd., our IP67 units utilize structural vacuum epoxy resin encapsulation, eliminating internal air cavities and making them immune to condensation, pressure differentials, and saltwater immersion in marine bilges or undercarriage installations.
Can Shenzhen Eltrum Electronic Co., Ltd. tailor charging profiles for specialized battery chemistries?
Yes. We regularly deliver OEM/ODM firmware adjustments. While standard models come calibrated for 3.65V/cell LiFePO4 configurations (e.g., 14.6V for 4S, 29.2V for 8S, 58.4V for 16S), our engineering department can customize cutoff absorption voltages, bulk current thresholds, pre-charge trickle parameters, zero-volt wake-up pulses, and float stages for Ternary Lithium (NMC / LiCoO2), LTO (Lithium Titanate), or specialized lead-crystal packs.
How do fanless sealed chargers dissipate heat under continuous maximum load?
Our fanless waterproof chargers rely entirely on conduction and natural convection cooling. High-dissipation power semiconductor components (primary MOSFETs, power inductors, PFC coils, and secondary Schottky rectification diodes) are mechanically coupled with thermal interface pads directly to our heavy-duty extruded 6063-T6 aluminum alloy heat sink chassis. The thermally conductive potting compound acts as an omnidirectional heat conductor, distributing thermal loads evenly across the chassis to eliminate hotspots and maintain reliable operation up to 65°C ambient temperatures.
What internal safety protection mechanisms are integrated into Eltrum chargers?
Every waterproof AC-DC charger from Shenzhen Eltrum Electronic Co., Ltd. integrates multi-layer hardware and firmware protections: Over Voltage Protection (OVP), Over Current Protection (OCP), Short Circuit Protection (SCP with auto-recovery), Over Temperature Protection (OTP with thermal foldback and cutoff), and Reverse Polarity Protection. Output power is only energized after sensing a valid connection to prevent dangerous sparking.
What is the minimum order quantity (MOQ) and lead time for sample evaluations?
To support OEM qualification and prototyping validation, standard sample orders start from an accessible MOQ of just 5 units (with select heavy-wattage models available from 1 to 2 units). Sample units typically ship within 5 to 7 working days. Batch production runs usually require 3 to 4 weeks, with global FOB or EXW delivery terms accepted. Inquiries can be directed directly to our engineering desk at [email protected].
What connector, cabling, and branding customization options are available?
Shenzhen Eltrum Electronic Co., Ltd. provides end-to-end custom termination options. We supply AC inputs with US NEMA, European Schuko, UK 3-pin, or Australian plugs. On the DC output side, we offer Anderson Powerpole / SB50 / SB175 connectors, insulated M8 / M10 eyelet rings, waterproof aviation circular connectors, XLR, and customized wire harnesses with integrated temperature sensors. Private buyer labeling, custom color anodized cases, and branded outer cartons are readily supported for OEM partners.
Accelerate Your Project with Waterproof Power Solutions
Contact the engineering and manufacturing team at Shenzhen Eltrum Electronic Co., Ltd. Receive comprehensive product datasheets, 3D CAD files, and wholesale OEM price breakdowns within 24 hours.