Smartgen BAC1203 User manual

BAC1203
BATTERY CHARGER
USER MANUAL
SMARTGEN (ZHENGZHOU) TECHNOLOGY CO., LTD.

Chinese trademark
English trademark
SmartGen —make your generator smart
SmartGen Technology Co., Ltd.
No.28 Jinsuo Road
Zhengzhou
Henan Province
P. R. China
Tel: [phone]
0086-371-67991553/67992951
0086-371-67981000(overseas)
Fax: [phone]
Web: http://www.smartgen.com.cn
http://www.smartgen.cn
Email: [e-mail]
All rights reserved. No part of this publication may be reproduced in any material form (including
photocopying or storing in any medium by electronic means or other) without the written permission of
the copyright holder.
Applications for the copyright holder’s written permission to reproduce any part of this publication
should be addressed to Smartgen Technology at the address above.
Any reference to trademarked product names used within this publication is owned by their respective
companies.
Smartgen Technology reserves the right to change the contents of this document without prior notice.
Table 1 Software Version
Date
Version
Note
2013-08-06
1.0
Original release.
2013-12-05
1.1
Modify the “Working Temperature”as (-30~55)°C.
2016-04-25
1.2
Remove the Logos of Smartgen on the product pictures.
2019-05-09
1.3
Change the title of Figure 3.

BAC1203 Battery Charger User Manual
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CONTENT
1. OVERVIEW........................................................................................................................................... 4
2. PERFORMANCE AND CHARACTERISTICS...................................................................................... 4
3. CHARGING PRINCIPLE ...................................................................................................................... 4
4. PARAMETERS CONFIGURATION...................................................................................................... 5
5. OPERATION......................................................................................................................................... 5
6. CASE DIMENSIONS ............................................................................................................................ 6

BAC1203 Battery Charger User Manual
BAC1203 Battery Charger Version 1.32019-05-09 Page 4 of 6
1. OVERVIEW
Fit with up-to-date power supply device, float charger BAC1203 is specially designed for meet the
charging characteristics of the lead-acid engine starter batteries and can be used for long-term float
charging of 12V lead-acid batteries.
2. PERFORMANCE AND CHARACTERISTICS
1) Switch power supply structure, wide input alternating voltage range, small size, light weight, high
efficiency rate;
2) Automatic two-stage charging process (first constant current, then constant voltage) carried out
according to storage battery charging characteristics to prevent overcharging and significantly prolong
battery lifetime;
3) Built-in current protective circuit for short-circuit protection and reverse connection protection. If
failure occurs, power indicator and charging indicator will flash rapidly.
4) Suitable for 12V storage battery and the rated current is 3A;
5) LED display: Power indication (Green light) and charging indication (Red light);
3. CHARGING PRINCIPLE
Two-Stage Method
Figure 1 Two-stage Charging Curve
Charging is performed according to the battery charging characteristics using two-stage method.
Charging type is ‘constant current type’ which means that when the battery terminal voltage falls below
the pre-set value, charging current will be constant; when the battery terminal voltage exceeds the
pre-set value, charging current will decrease with the rising of terminal voltage until the pre-set current
value is reached; then Chargers automatically return to float mode and the charging indicator will
illuminate. As soon as charging current value falls below 0.3A and the constant voltage value is reached,
the battery is basically charged (charging indicator will extinguish). After that charging current will only
neutralize the battery self discharge. Even long-term charging cannot harm the battery, as charger can
keep the battery fully charged and so guarantee long lifetime of the battery.

BAC1203 Battery Charger User Manual
BAC1203 Battery Charger Version 1.32019-05-09 Page 5 of 6
4. PARAMETERS CONFIGURATION
Table 2 Technical Parameters
Items
Contents
24V
Input
Characteristics
Nominal AC Voltage
AC (100~240)V
Max. AC Voltage
AC (90~280)V
AC Frequency
50Hz/60Hz
Max. Current
1A
Efficiency
>80%
Output
Characteristics
Rated Charging Current
3A
Charging Current Error
±2%
Max. Output Power
42W
No-load Output Voltage
13.8V
(Error±1%)
No-load power consumption
<3W
Insulating
Property
Insulation Resistance
Between input and output, input and shell both
are: DC500V 1min RL≧50MΩ
Insulation Voltage
Between input and output, input and shell both
are: AC1500V 50Hz 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)
Storage Humidity
10%RH~95%RH ( No condensation)
Shape Structure
Weight
0.38kg
Dimension
110.5mm×106mm×45mm (length*width*height)
5. OPERATION
Figure 2 BAC1203 MASK
1. Connect terminals L and N to alternating voltage (100~240)V using BVR 1mm2multi-strand copper
line.
2. Connect B+ and B- to battery positive and negative using multi-strand BVR1.5mm2copper wires.
3. PE terminal: earth terminal; connect to shell innerly.
4. POWER: power supply indicator, illuminated when the charger is operating normally.
5. CHARGING: charging indicator, illuminated when charging current exceeds 0.3A while extinguished
when battery charging is finished.
NOTE:
1) Because there is diode and current-limiting circuit inner the charger, it can be used together with charging generator,
and there is no need to disconnect the charger when cranking.
2) During genset is running, high current will cause voltage drop in charging line, so recommend separately connecting to
battery terminal to avoid disturbance on sampling precision.

BAC1203 Battery Charger User Manual
BAC1203 Battery Charger Version 1.32019-05-09 Page 6 of 6
6. CASE DIMENSIONS
Figure 3 BAC1203 Case Dimensions
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