SmartGen BAC1205N/BAC2403N Battery Charger User Manual
Overview
The BAC1205N/2403N battery charger utilizes the latest switch power components. It is specifically designed for charging lead-acid starting batteries according to their properties, making it suitable for long-term supplementary charge (float charge).
Performance and Characteristics
This product offers the following characteristics:
- Designed with a switching power structure, providing a wide range of AC voltage input, small volume, light weight, and high efficiency.
- Employs a two-stage charging method (constant current first, then constant voltage). This method fully considers the charging properties of lead-acid batteries, preventing overcharging and extending battery life.
- Includes short circuit and reverse connection protection.
- Suitable for charging 12V or 24V batteries with the corresponding models: BAC1205N for 12V and BAC2403N for 24V.
- Features LED displays for charging indication and full charge indication.
- Offers easy installation options: guide-rail mounting or screw mounting.
- Built-in terminals and a flame-retardant plastic shell.
Charging Principle
Based on the charging properties of lead-acid batteries, the BAC1205N_BAC2403N battery charger uses a 2-stage charging method with a "constant-current" charge mode. When the battery voltage is below a set threshold, it charges in constant-current mode. As the battery voltage rises above the threshold, the charging current decreases while the voltage continues to rise until it reaches the set voltage. At this point, the mode switches to "float charge." The charging current gradually reduces, and the battery voltage rises to the set value. When the charging current drops below 0.3A, the battery is considered basically fully charged (the charging indicator will turn off). Subsequently, the charging current will offset the battery's self-discharge, ensuring the battery remains fully charged and extending its lifespan.
Figure 1: Charging Curve
This diagram illustrates the charging process. The graph shows Battery Voltage and Battery Current over time (t). The Battery Voltage increases from approximately 13.2V (for 12V systems) or 27.0V (for 24V models) to a higher threshold, around 13.8V (for 12V) or 27.6V (for 24V). The Battery Current starts at a high level (e.g., 5A for BAC1205N) and decreases as the voltage rises, eventually falling below 0.3A.
Parameters Specification
The following table details the specifications for the BAC1205N and BAC2403N models:
| Items | Parameters | |
|---|---|---|
| BAC1205N | BAC2403N | |
| Input Characteristics | ||
| Nominal AC Voltage | AC (100~277)V | AC (100~277)V |
| Max. AC Voltage | AC (90~305)V | AC (90~305)V |
| AC Input Frequency | 50/60Hz | 50/60Hz |
| Max. Active Power | 84W | 100W |
| Max. Input Current | 1.5A | 1.7A |
| Output Characteristics | ||
| Battery Voltage | 12V | 24V |
| No-load Output Voltage | 13.8V, Error±2% | 27.6V, Error±2% |
| Rated Output Current | 5A, Error±5% | 3A, Error±5% |
| Max. Output Power | 69W | 85W |
| Max. Efficiency | 84% | 87% |
| No-load Loss | <3W | <3W |
| Insulating Property | ||
| Insulating Resistance | Between input and output, input and shell, output and shell are: RL = 500MΩ | |
| Insulating Voltage | Between input and output, input and shell are: AC3000V 50Hz (DC4200V) 1min. Leakage current: IL≤3.5mA. Between output and shell is: AC3000V 50Hz (DC4200V) 1min. Leakage current: IL≤3.5mA. | |
| Working Condition | ||
| Working Temperature | -30~+55°C | |
| Storage Temperature | -40~+85°C | |
| Working Humidity | 20%RH~93%RH (No Condensation) | |
| Shape Structure | ||
| Weight | 0.45kg | |
| Dimension | 95mm×149mm×61mm (length×width×height) | |
Operation
The following describes the panel layout and operation for the BAC1205N and BAC2403N chargers.
Figure 2: BAC1205N (left) & BAC2403N (right) Panel Drawings
The panel features input terminals labeled 'L' (Live), 'N' (Neutral), and 'PE' (Protective Earth). Output terminals are labeled 'B-' (Battery Negative) and 'B+' (Battery Positive). Both models display a 'CE' certification mark. Indicator LEDs are present for 'Charging' (typically Red) and 'Full Charged' (typically Green). A power symbol [power-symbol] is also depicted.
Panel Drawing Description:
- Connect terminals L and N to an alternating voltage of 100~277V using BVR 1mm² or larger multi-strand copper wire.
- Connect terminals B+ and B- to the battery's positive and negative terminals, respectively, using multi-strand BVR1.5mm² or larger copper wires.
- Charging Indicator: Illuminates Red when the charging current exceeds 0.5A.
- Full Charged Indicator: Illuminates Green when the charger is in no-load state or the battery is fully charged.
Note:
- Due to the internal diode and current-limiting circuit, this charger can be used in parallel with a generator charger. Disconnecting the charger is not required when the generator is cranking.
- When the generator is running, high current can cause voltage drop in the charging line. It is recommended to connect the charger separately to the battery terminals to avoid disturbances in sampling precision.
Case Dimensions and Installation
The chargers can be installed using two methods:
Installation 1: Screw Fixed Installation
Figure 3: Screw Fixed Installation
This method involves mounting the charger using screws. The dimensions are approximately 95mm in width, with mounting holes spaced 80mm apart. The overall height is approximately 133mm, and the depth is 61mm. An M4 screw is recommended for this installation.
Installation 2: Guide-rail Installation
Figure 4: Guide-rail Installation
This method allows the charger to be mounted on a standard guide rail. The mounting depth for the rail is approximately 35mm.
Battery Type Selection
There are two types of batteries supported by these chargers:
- The BAC1205N is designed for 12V batteries, with a maximum output current of 5A.
- The BAC2403N is designed for 24V batteries, with a maximum output current of 3A.
Please pay attention to the charger model when placing orders.
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