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Abyss Battery

Abyss Battery On-Board 36V 20A High-Precision Marine Lithium Battery Charger - AB-CRG-36V20A

Abyss Battery On-Board 36V 20A High-Precision Marine Lithium Battery Charger - AB-CRG-36V20A

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Abyss Battery On-Board 36V 20A High-Precision Marine Lithium Battery Charger - AB-CRG-36V20A

Experience longer run times and shorter charge times when you use our onboard 36V 20A High Precision Lithium Battery Charger. meticulously engineered to deliver unparalleled efficiency, intelligence, and speed in battery charging. Designed specifically for the, this charger offers users extended battery life and reliability with its built-in protection and innovative safety features. 

Our charger not only promises exceptional performance and reliability but also provides the peace of mind that comes with advanced safety features. Additionally this marine battery charger offers wide range compatibility and can be used to charge other brands of 36-Volt Lithium Batteries. Optimize your time on the water with a charger that stands at the forefront of technology, offering you the quickest, most intelligent, and efficient charging solution.

Features
  • IP68 Rating.
  • 2-Year Warranty.
  • Marine-grade construction.
  • Ignition Protection.
  • Overcurrent limit.
  • High voltage safety.
  • Reverse connection protection.
  • Temperature protection.
  • Full-Auto timing shutdown.
  • Anti-Walking function.
  • LED indicator for Charging Process.
  • CAN communication (optional).
  • 12V5A Auxiliary power supply (optional).
What our Experts Think  
  • High-efficiency 36V lithium charging – Purpose-built for 36V LiFePO₄ marine battery systems, delivering a stable 20A output for fast, controlled, and reliable charging cycles.
  • Fast recharge without battery stress – Advanced smart charging profile automatically adjusts voltage and current to protect cells while reducing total charge time.
  • Marine-grade durability – Fully sealed, epoxy-filled construction with IP68-level waterproofing ensures reliable operation in harsh saltwater and wet environments.
  • Advanced multi-layer protection – Built-in safeguards against over-voltage, over-current, overheating, short-circuit, and reverse polarity for maximum safety on board.
  • High-precision charging control – Maintains consistent output accuracy for optimal battery health and extended cycle life, even under continuous use.
  • Field-ready installation design – Compact on-board format with long, marine-rated cables allows clean, permanent installation in tight compartments.
  • Built for demanding marine systems – Ideal for trolling motor banks and high-capacity lithium setups where reliability and uptime are critical.
                 
Q&A    

Q: What is the Abyss Battery 36V 20A On-Board Marine Lithium Charger used for?
A: It is a high-output onboard charger designed to efficiently charge 36V LiFePO4 marine battery systems used in trolling motors and electric boats.

Q: Is the AB-CRG-36V20A compatible with all 36V batteries?
A: It is optimized for 36V lithium (LiFePO4) battery banks and is commonly used with marine trolling motor systems from brands like Minn Kota, MotorGuide, and Garmin.

Q: Can this charger be permanently installed on a boat?
A: Yes, it is designed as an on-board charger for permanent installation with marine-grade durability and waterproof construction.

Q: How fast does it charge a 36V lithium battery system?
A: With a 20A output, it provides fast, efficient charging depending on total battery capacity, significantly reducing downtime between uses.

Q: Does it automatically stop charging when full?
A: Yes, it features smart charging technology with automatic shutoff and BMS communication support for safe, complete charging.

Q: Is it safe for marine environments?
A: Yes, it is built with high-precision thermal management, corrosion resistance, and multiple protection systems for harsh marine conditions.

Q: What safety features are included?
A: It includes over-voltage, over-current, short-circuit, reverse polarity, and temperature protection for reliable onboard use.

               
Maintenance Tips  
  • Use only with 36V LiFePO4 lithium batteries (43.3–44.2V charge profile)
  • Connect to 120–240V AC stable power supply to avoid voltage instability
  • Install in a dry, well-ventilated marine compartment (heat management is critical during 20A output)
  • Do not block vents; allow full airflow for cooling and fan operation
  • Regularly inspect DC leads, fuse, and connectors for corrosion or looseness
  • Avoid using undersized extension cords (prevents overheating & voltage drop)
  • Keep charger away from direct water spray despite IP-rated sealing
  • Ensure correct polarity before every connection (reverse protection built-in but not foolproof)
  • Let charger cool down after long charging cycles before storage
  • Use proper mounting to reduce vibration damage in marine environments
  • Do not use with lead-acid or mismatched voltage batteries
  • Periodically check LED indicators for charging status and fault alerts
  • Disconnect after full charge to avoid unnecessary standby load
  • Avoid extreme heat above 40–50°C operating range for long life