Green Digital Power-tech BG1F-4 Guide
User Installation Manual
Green Digital Power-Tech CO. , LTD.
SPECIFICATION PREPARE CHECK APPROVE
MODEL: USED IN:
ISSUE DATE : 3/18/2013 9:41:00 AM
COMMON/UNITE DOC. NO: REV.:
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BG1F-4 12.8V （4S）LiFePo4 Battery Fuel Gauge
No. Item Unit
Specification Remark
Specification
01 Rating Input Voltage V DC 8~13V
02 Suitable battery type 12.8V 4s LiFePo4
03 Max. Charge/Discharge
Current permitted.
A No Limitation.
This value depends on the external
Current sensor wired with battery
negative, see attached drawing.
04 Current sensor resistor value
recommended. (Series in
negative path)
Ω0.005 for 20A~50A working current.
0.01 for 5A~20A working current.
0.05 for 1A~5A working current.
05 Working Consumed Power
mA
5
06 OFF Status leakage current mA
1 Push “On” button.
07 Fuel gauge display tolerance % +- 20%
Top View and Illustration
Installation
1. Make sure the battery you wired is 12.8V 4S LiFePo4.
2. Connect the RED WIRE with your battery positive pole,
Connect the BLACK WIRE with your battery negative pole.
3. Series a current sensor resistor between the battery negative pole and the load/charger (also we called output negative).
The recommended value of this current sensor is 0.005~0.05 ohm, depended on your load’s working current.
If you have a BMS in your battery-pack, you can use the series current sensor resistor on this BMS, then you do not
need to do above job.
.
4. Connect the GREEN WIRE with the load/charger output negative terminal, after above “current sensor resistor”.
End of installation.
Caution:
1. The Black and Green wire should be connected properly, if not the charging and discharging status and fuel gauge will
be reversed and in correct.
2. Please read this manual and understand attached schematic drawing before connect any wire!
Red: connect battery +
Black: connect battery
Green: connect
load/charger
Display
Push ON/OFF
Battery Fuel Gauge LED
User Installation Manual
Green Digital Power-Tech CO. , LTD.
SPECIFICATION PREPARE CHECK APPROVE
MODEL: USED IN:
ISSUE DATE : 3/18/2013 9:41:00 AM
COMMON/UNITE DOC. NO: REV.:
1.0 PAGE:
2 OF 2
Installation drawing:
BG1F-XX
Battery fuel gauge
Load Device
Positive “+”
Load/Charger
Negative “-”
Battery Negative pole
Red wire
Current Sensor
5~50mΩ
Battery Positive pole
Black
wire
Green
wire
