1. Introduction
The Smartgen BAC06A is an intelligent floating battery charger designed for lead-acid starting batteries, commonly used in diesel generator applications. It features a switching power structure, offering a wide range of AC voltage input, compact size, light weight, and high efficiency. This manual provides essential information for the safe and effective installation, operation, and maintenance of your BAC06A charger.
2. Key Features
- Switching Power Structure: Designed with advanced switch power components for high efficiency and reliability.
- Wide AC Voltage Input: Operates effectively across a broad range of AC input voltages (95-280VAC).
- Two-Stage Charging Method: Utilizes a constant current followed by constant voltage charging profile, optimizing battery life and preventing overcharging.
- Protection Features: Includes built-in short circuit and reverse connection protection for enhanced safety.
- Adjustable Output: Charging voltage and current can be precisely adjusted via potentiometers on the unit.
- LED Indicators: Provides clear visual feedback for power status and charging activity.
- Compact Design: Small volume and light weight for easy installation.
3. Safety Information
Please read and understand all safety instructions before installing or operating the charger. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure the AC input voltage matches the charger's specified range (95-280VAC).
- Always disconnect AC power before making or breaking any connections to the charger or battery.
- Connect the battery with correct polarity (B+ to positive, B- to negative). Reverse connection protection is present, but incorrect wiring should always be avoided.
- Install the charger in a well-ventilated area to prevent overheating.
- Do not operate the charger in damp or wet conditions.
- Do not attempt to open or repair the charger. Refer all servicing to qualified personnel.
- Keep out of reach of children.
4. Product Overview
The Smartgen BAC06A charger features a robust metal casing with ventilation for heat dissipation. The front panel provides all necessary connection terminals, indicators, and adjustment controls.

Figure 1: Angled view of the Smartgen BAC06A charger, showing its compact design and ventilation.

Figure 2: Front panel of the BAC06A charger, detailing the AC input (L, N), DC output (B-, B+) terminals, Power and Charging LEDs, 10A fuse, and adjustment potentiometers for voltage and current.
4.1 Components and Indicators
- L, N Terminals: AC input connections (Live and Neutral).
- B-, B+ Terminals: DC output connections for the battery (Negative and Positive).
- Power LED: Illuminates when AC power is supplied to the charger.
- Charging LED: Illuminates when the charger is actively charging the battery.
- FUSE (10A): Integrated fuse for protection.
- VOLTS ADJ. Potentiometer: Used to adjust the charging voltage.
- AMP ADJ. Potentiometer: Used to adjust the charging current.
5. Specifications
The following table outlines the technical specifications for the Smartgen BAC06A 24V Intelligent Floating Battery Charger.

Figure 3: Bottom view of the BAC06A charger, showing mounting holes for secure installation.
| Category | Item | Value (24V Model) |
|---|---|---|
| Input | Nominal AC Voltage | AC (100~250)V |
| Max. AC Voltage | AC (90~280)V | |
| AC Frequency | 50Hz/60Hz | |
| Max Input Current | 2A | |
| Power Consumption | 115W | |
| Output | Battery Voltage | 24V |
| Max. Charge Current | 3A | |
| Charge Voltage Range | (26~29)V | |
| Charge Current Range | (1.5~3.5)A | |
| Max. Power | 75W | |
| No-load Voltage | 27.6V (Error ±1%) | |
| No-load power consumption | <3W | |
| Efficiency | Efficiency | More than 85% |
| Insulation | Insulation Resistance | Between input and output, input and shell both are: DC500V 1min R≥50MΩ |
| Insulation Voltage | Between input and output, input and shell both are: AC1500V 50Hz 1min | |
| Leakage Current | IL≤3.5mA | |
| Environmental | Working Temperature | (-40~60)°C |
| Storage Temperature | (-40~85)°C | |
| Working Humidity | 10%RH~95%RH (No condensation) | |
| Physical | Dimensions (L×W×H) | 143mm × 96mm × 55mm |
| Weight | 0.65kg |
6. Setup and Installation
Follow these steps for proper installation of your BAC06A charger.
6.1 Mounting
- Select a dry, well-ventilated location, away from direct sunlight, heat sources, and flammable materials.
- Ensure there is sufficient space around the charger for air circulation.
- Mount the charger securely using the mounting holes provided on its base.
6.2 Wiring Connections
Refer to Figure 2 for terminal locations. Ensure all connections are tight and secure to prevent loose contacts and potential hazards.
- Battery Connection:
- Connect the battery's positive (+) terminal to the charger's B+ terminal.
- Connect the battery's negative (-) terminal to the charger's B- terminal.
- Important: Double-check polarity before connecting.
- AC Input Connection:
- Connect the Live (L) wire of your AC power supply to the charger's L terminal.
- Connect the Neutral (N) wire of your AC power supply to the charger's N terminal.
- Ensure the AC power source is within the specified range of 95-280VAC.
7. Operation
Once properly installed and wired, the BAC06A charger is ready for operation.
7.1 Initial Power-Up
- After all connections are made, apply AC power to the charger.
- The Power LED should illuminate, indicating that the charger is receiving power.
- If a battery is connected and requires charging, the Charging LED will also illuminate.
7.2 Voltage Adjustment
The charging voltage can be adjusted to match specific battery requirements. This adjustment should be performed with the battery disconnected from the charger.
- Disconnect the battery from the charger's B- and B+ terminals.
- Apply AC power to the charger.
- Using a voltmeter, measure the output voltage across the B- and B+ terminals.
- Carefully turn the VOLTS ADJ. potentiometer (refer to Figure 2) until the desired voltage is achieved. For a 24V system, the typical float charge voltage is around 27.6V.
- Once adjusted, disconnect AC power and reconnect the battery.
7.3 Current Adjustment
The charging current can also be adjusted. This is typically done when the battery voltage is below 25.0V (for a 24V system).
- Ensure the battery is connected and the charger is powered on.
- If the battery voltage is below 25.0V, the charger will be in constant current mode.
- Using an ammeter in series with the battery, measure the charging current.
- Carefully turn the AMP ADJ. potentiometer (refer to Figure 2) to set the desired charging current. The maximum charge current for the 24V model is 3A.
8. Maintenance
The Smartgen BAC06A charger is designed for reliable operation with minimal maintenance. However, periodic checks can help ensure its longevity and performance.
- Cleaning: Keep the charger clean and free from dust and debris. Use a dry, soft cloth for cleaning. Do not use liquid cleaners.
- Connections: Periodically check all wiring connections (AC input and DC output) to ensure they are tight and free from corrosion.
- Ventilation: Ensure that the ventilation holes on the charger are not obstructed to allow for proper heat dissipation.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges.
9. Troubleshooting
If you encounter issues with your BAC06A charger, consider the following basic troubleshooting steps:
- Charger Not Powering On (Power LED Off):
- Check the AC input power supply.
- Verify the AC input wiring (L and N terminals).
- Inspect the internal fuse (10A). If blown, replace with a fuse of the same rating.
- Charging LED Not Illuminating:
- Ensure the battery is properly connected with correct polarity.
- Check the battery voltage. If the battery is fully charged, the charging LED may not illuminate as the charger enters float mode.
- Verify the charging voltage setting using the VOLTS ADJ. potentiometer.
- Low Charging Current:
- Check the AMP ADJ. potentiometer setting.
- Ensure the battery is not already near full charge.
If problems persist after performing these checks, please contact your supplier or a qualified technician for assistance.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided by your retailer or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.





