Advanced Charging Technology in RA Series Bidirectional Inverters

Intelligent Three-Stage Charging Architecture

The RA series bidirectional inverters implement an optimized charging protocol that maximizes both efficiency and battery lifespan:

1. Bulk Charge Mode

   • Delivers 100A maximum current (as specified in RA2000W/3000W datasheets)

   • Charges batteries to 80% SOC in record time

   • Automatic current adjustment based on battery voltage (10.5-14.5V range)

2. Absorption Mode

   • Maintains precise voltage at battery terminals (13.2V nominal, up to 14.8V max)

   • Incorporates temperature compensation (referencing -10℃ to +45℃ operating range)

3. Float Maintenance

   • Sustains batteries at optimal voltage (13.8V default, adjustable 13.5-14V)

   • Uses pulse charging technology to prevent stratification

Product-Specific Charging Features

Multi-Battery Compatibility

RA inverters support all major battery types through selectable profiles:

• AGM/Flooded Lead-Acid (Default setting)

• LiFePO4 (Preconfigured lithium parameters)

• NMC Lithium (User-adjustable voltage limits)

Charging Efficiency Performance

Consistent with product specifications:

• ≥91% efficiency @220Vac input

• ≤1500mV ripple noise (measured with 0.1μF ceramic + 10μF electrolytic capacitors)

Advanced Technical Implementation

Power Conversion Topology

Utilizes the same high-efficiency architecture as the inverter section:

• 92% peak efficiency (matches inverter efficiency rating)

• ≤30ms switching time (equivalent to bypass transition spec)

Thermal Management

Leverages the proven cooling system:

• Air cooling design (as per product specs)

• Temperature-controlled fan operation

• Follows same protection thresholds:

  • 95℃: Power derating begins

  • 105℃: System shutdown

Smart Charging Capabilities

Configurable Parameters

Through the 17-setting menu system (documented in user manuals):

1. Maximum charge current (60-100A adjustable)

2. Absorption voltage (13.5-14.2V range)

3. Float voltage (13.5-14V range)

4. Recharge voltage (12-13.2V adjustable)

Protection Systems

Incorporates the same safety mechanisms as the inverter function:

• Short circuit protection

• Reverse polarity protection

• Over-temperature limits

• Voltage accuracy within ±0.8V

Real-World Performance

Charging Scenarios

1. With Grid Power:

   • 180-264Vac input range

   • 47-63Hz frequency tolerance

   • ≤20W no-load consumption

2. With Solar Input:

   • Compatible with external solar controllers

   • Maintains charging during grid outages

Performance Validation

All charging functions comply with:

• GB4943 safety standards

• 3000Vac dielectric withstand rating

• 5mA max leakage current

Technical Advantages Over Competitors

1. Higher Charge Current:

   • 100A capability vs typical 80A competitors

   • Matched to 2000W/3000W power capacity

2. Precision Control:

   • ±0.8V voltage accuracy

   • ≤8% current accuracy

3. System Integration:

   • Seamless transition between charge/invert modes

   • 485/CAN communication support

This charging system represents a perfect complement to the RA series' renowned inverter capabilities, delivering complete energy management in one integrated package. The technology has been proven in thousands of installations, from telecom base stations to off-grid homes, consistently demonstrating the reliability and performance promised in product specifications.