Renogy 20A AC-to-DC LFP Portable Battery Charger

Reliable, quiet charging for 12V LiFePO4 batteries — including a wake-up function for BMS-protected cells

The Renogy 20A portable charger automatically charges and maintains 12V lithium-iron phosphate (LiFePO4 / LFP) batteries. It senses battery voltage and current, uses a three-stage charging profile, and includes an activation mode to recover batteries that have triggered BMS protection. The unit is fanless, certified for safety, and built for easy, worldwide use.

Benefits

• Get batteries back into service: the activation function can wake a lithium battery that has entered BMS protection, avoiding unnecessary replacements.
• Save time: intelligent, three-stage charging (CC ? CV ? trickle) delivers efficient charging so batteries reach full capacity faster.
• Less noise and fewer installation constraints: fanless, patented plastic profile dissipates heat quietly and reduces space/angle concerns.
• Charge anywhere: wide AC input (100–240 VAC) makes the charger compatible with power grids around the world.
• Feel secure: multiple built-in protections and clear indicator lights reduce worry while charging.
• Simple setup: plug-and-play connections and included cable let you start charging with minimal fuss.

Features

• Lithium battery activation mode to exit BMS low-voltage/low-temperature protection and resume charging.
• Three-stage smart charging: constant current (CC), constant voltage (CV), and trickle maintenance.
• Automatic voltage and current detection to switch charging stages without user input.
• High efficiency — up to about 92% conversion efficiency.
• Six built-in safety protections: short circuit, over-current, over-temperature, over-voltage, under-voltage, and reverse polarity protection.
• Visual status indicator shows charging stage and fault conditions.
• Fanless design with a patented plastic profile for rapid passive heat dissipation and silent operation.
• Wide AC input range (100–240 VAC 50/60 Hz) for international use.
• Includes battery charging cable with alligator clips (12 AWG) and blade fuse for reverse-connection protection.
• Portable form factor for in-vehicle, RV, marine, and home use.

Specifications

• Model: RBC20A1P
• Charger type: AC-to-DC portable charger preset for Lithium-iron Phosphate (LiFePO4 / LFP) 12V systems
• Rated charge current: 20 A
• Maximum charge power: 340 W (12V battery)
• Battery input voltage range: 11 V DC – 16 V DC
• Rated input voltage: 100–240 VAC, 50/60 Hz
• Self consumption: 50 mA
• Charger efficiency: up to ~92%
• Indicator: multi-color LED showing charging stage and fault status
• Built-in protections: short circuit, over-current, over-temperature, over-voltage, under-voltage, reverse polarity
• Included accessories: 20A AC-to-DC LFP Portable Battery Charger (1×), battery charging cable with 12 AWG alligator clips, blade fuse
• Terminal size: 14 AWG
• Dimensions (L × W × H): 233 × 108 × 64 mm (9.20 × 4.30 × 2.52 in)
• Weight: 1.7 kg (3.8 lbs)
• Operating temperature: -29 °C to 45 °C (-20 °F to 113 °F)
• Storage temperature: -40 °C to 75 °C (-40 °F to 167 °F)
• Humidity: 90%–95% RH
• Enclosure rating: IP20
• Regulatory & safety certifications: UKCA, CE, CB, PSE
• Typical charging time example: roughly 3.5 hours to replenish a 100 Ah LFP battery at the charger’s 20 A rate (actual time depends on battery state and BMS limits)
• Warranty: 2-year material and workmanship warranty for accessories (see full warranty for specifics)