Baintech BT-1212-15A Marine DC-DC Battery Charger – 12V Output 15A

This 15A charger accepts DC input from vehicle alternators or primary battery banks, converting it to precise output optimized for lithium chemistry. The waterproof, dust-proof and shockproof marine-grade enclosure mounts in almost any location, from engine rooms to under-seat battery compartments. Compact and lightweight construction fits tight installation spaces while imported high-reliability capacitors ensure consistent performance across Australia's extreme temperature and vibration conditions.

Designed for marine and off-road environments where auxiliary lithium batteries (100-200Ah) require fast charging during limited engine run times. The non-isolated design delivers efficient power conversion while comprehensive protection circuits safeguard against over-voltage, low voltage, over-temperature, overload and short circuits. Backed by a 2-year limited warranty, this charger provides confidence for critical dual battery installations where charging system failure could compromise safety in remote locations.

Key Specifications

• Rated output: 12V DC, 15A
• Input type: DC (non-isolated input/output)
• Battery chemistry: Lithium (LiFePO4 and LiMn2O4 optimized)
• Environmental protection: Waterproof, dust-proof, shockproof (marine grade)
• Cooling method: Natural convection (compact, lightweight design)
• Component quality: Imported high-reliability capacitors
• Warranty: 2 years limited warranty
• Safety certifications: CE, RoHS
• Protection features: Over-voltage, low voltage, over-temperature, overload, short circuit

Features & Benefits

Versatile Mounting Options: Compact, lightweight design with waterproof construction mounts in almost any location including engine rooms, battery compartments, under seats and external caravan boxes. Eliminates installation constraints that limit charger placement in space-restricted builds.

High-Reliability Components: Imported capacitors deliver consistent performance under Australian heat, vibration and voltage fluctuations. Critical for marine and off-road applications where component failure in remote locations creates safety risks and expensive recovery operations.

Comprehensive Protection Suite: Five-layer protection against over-voltage, low voltage, over-temperature, overload and short circuits safeguards both charger and battery investment. Prevents damage from alternator voltage spikes, deep primary battery discharge and electrical system faults.

Marine-Grade Environmental Protection: Waterproof, dust-proof and shockproof construction withstands engine room spray, bilge water exposure and constant vibration. Operates reliably in conditions that cause standard DC-DC chargers to corrode or fail within the first season.

Non-Isolated Design Efficiency: Direct electrical connection between input and output delivers efficient power conversion with minimal heat generation. Suitable for applications where input and output share common negative (ground) connections, typical in most vehicle dual battery systems.

2-Year Warranty Coverage: Manufacturer-backed warranty provides confidence for critical electrical system installations. Demonstrates manufacturer commitment to product reliability in harsh Australian marine and off-road environments.

Technical Specs

• Model: BT-1212-15A
• Rated output voltage: 12V DC
• Rated output current: 15A
• Maximum output power: Not specified (approximately 180-220W depending on charge stage)
• Input voltage range: Not specified (typical 12V DC systems)
• Input/output configuration: Non-isolated (common ground)
• Battery chemistry compatibility: Lithium (LiFePO4, LiMn2O4)
• Charging method: Not specified (likely CC/CV for lithium)
• Environmental protection: Waterproof, dust-proof, shockproof
• Mounting: Universal (mounts in almost any location)
• Construction: Compact and lightweight
• Component specification: Imported high-reliability capacitors
• Over-voltage protection: Yes
• Low voltage protection: Yes (prevents deep discharge of primary battery)
• Over-temperature protection: Yes
• Overload protection: Yes
• Short circuit protection: Yes
• Certifications: CE, RoHS
• Warranty period: 2 years limited warranty

Compatible With / Goes Well With

• 12V LiFePO4 auxiliary battery systems (75Ah-200Ah optimal range)
• 12V LiMn2O4 lithium house banks
• Dual battery systems in 4WD vehicles, utes and wagons
• Marine electrical systems with 12V lithium auxiliaries (dry mounting locations)
• Caravan and camper trailer battery systems
• Vehicle-based solar charging integration
• Trade and commercial vehicle auxiliary power systems
• Off-grid touring and expedition electrical setups

Caution: Non-isolated design requires common ground between input and output. Verify your system configuration before installation. Output is 12V only and optimized for lithium chemistry.

Frequently Asked Questions

What does "non-isolated" mean for installation?

Non-isolated means the input negative and output negative share a common ground connection. This is standard for most vehicle dual battery systems where both batteries share the chassis ground. Do not use in applications requiring electrical isolation between input and output circuits.

Can this charge from a 12V alternator while driving?

Yes, this is designed for alternator-based charging in 12V vehicle electrical systems. The charger regulates current draw to protect the alternator while maximizing charge delivery to the auxiliary lithium battery during engine operation.

Where can I mount this charger?

The waterproof, dust-proof construction allows mounting in engine rooms, battery boxes, under seats, external caravan compartments and most other locations. Ensure adequate ventilation around the unit and avoid sealing in completely enclosed spaces.

Does this work with lead-acid auxiliary batteries?

This charger is optimized for lithium chemistry (LiFePO4 and LiMn2O4). While it may charge lead-acid batteries, voltage profiles may not match lead-acid requirements. Use lithium-specific chargers only with lithium batteries for optimal performance and safety.

What is the low voltage protection for?

Low voltage protection prevents the charger from draining your primary (starter) battery below safe levels. When primary battery voltage drops too low, the charger reduces or stops auxiliary charging to preserve starting capacity.