12V 20A DC to DC Battery Charger for RV, Van, Boat, Off-Grid | Lithium & Lead-Acid Batteries

Features

Broad System Compatibility

• Compatible with 12V AGM, Flooded, Gel, and Lithium batteries
• Compatible with smart or traditional alternators via connection to the 12V starter battery
• Ideal for RVs, vans, boats, and off-grid power systems

Smart Multi-Stage Charging

• 2-stage charging for lithium batteries
• 3-stage charging for lead-acid batteries (Bulk → Absorption → Float)
• Lithium Battery Activation: Automatically wakes up over-discharged lithium batteries

Smart Protection & Control

• Built-in protection against over-voltage, over-temperature, and reverse polarity
• Battery isolation prevents reverse current between batteries and protects the starter battery

Advanced Control Interfaces

• D+ Ignition Terminal: Charges only when the engine is running to protect the starter battery
• LC Terminal: Activates low current mode (10A) for small alternators or weak power sources
• RJ11 Temperature Sensor Port: Adjusts voltage for cold and hot environments to protect battery lifespan (Not for lithium batteries)

*D+, LC cables, and a temperature sensor are not included

Specifications

• Output Nominal Power: 250W 
  
• Output Nominal Current: 20A
  
• Operating Current Range: 18~22A
  
• Low Current Mode: 10A
  
• Floating Charge Current: 3~5A
  
• Low Current Mode Current Range: 8~11A
  
• Quiescent Current: ＜0.45A
  
• Ripple Voltage: ＜500mV rms
  
• Battery Charging Mode: 3-Stage type
  
• Efficiency: >85%, @14VDC 30% load
  
• Input Nominal Voltage: 12VDC
  
• Operating Voltage Range: 10~16VDC
  
• Input Current Limit: ≤34A
  
• Dimensions: 8.4*7.4*3.1 in / 213*188*79 mm
  
• Weight: 4.0lb / 1.8kg