Lyte 121230 User manual

energy. made easy.
DC-DC Battery charger
User manual
lyte 121230 | lyte 121245
Thank you for choosing lyte, please read this product manual carefully before using our products.
Features
1. This is a fully automatic battery charger, designed for RV, camper, boat and other applications.
2. Automatically adjustable three-stage charging program, suitable for lead-acid, AGM, GEL, LiFePO4, Lithium-ion (NCM)
batteries, total 5 types of batteries.
3. An external display and/or Bluetooth module can be connected to the charger, data can be viewed through the mobile
phone app (these accessories need to be purchased separately)
4. If you need to drive a long distance, please charge the battery fully.
5. Exquisite design, small size, light weight, high-frequency switch and buck-boost technology to ensure safe
and reliable operation.
6. Fully automatic operation; when the car alternator starts, the charging function is automatically activated and
avoids starter battery discharge when the alternator is stopped.
7. Unattended charging; the controller will automatically disconnect from the main battery under extreme
conditions, such as overheating, overvoltage, short circuit, over-current.
8. External temperature sensor: 1. The charging voltage can be automatically compensated according to the ambient
temperature (only for lead-acid batteries, lithium batteries have no temperature compensation function); 2. When the
ambient temperature is too low (-20℃) or too high (50℃), the charger will charge at a safe voltage.
Installation
1. Please install the charge controller as close to the main battery as possible, and keep the surroundings clean, tidy and
well ventilated. To be installed on a hard surface.
2. It should be installed in a moisture-proof, water-proof and corrosion-proof place.
3. When the charging controller is working, the fan will bring out heat, so when installing, make sure to leave at least
>10cm behind the charger controller.
4. According to the table below, select the specifications of the connecting wire, the length and the specification
of the fuse. Reverse polarity connection of the battery will cause serious damage to the equipment.
B2B121230
Cable Cross-section
6mm2
10mm2
16mm
2
Cable Length "+ IN" to "+ START"
up to 3.5m
up to 6m
up to 10m
Cable Length "-OUT"
to "- Board"
0.8-2m
1.5-3m
2.5-5m
Cable Length "+OUT" to "+Board"
0.8-2m
1.5-3m
2.5-5m
5.The house/leisure/Board battery type (lead-acid, GEL, AGM, LiFeP04, lithium-ion (NCM)), please set the battery type before use

Connection Scheme
IN 12V
Ⅱ
START
OUT 12V
Ⅰ
BOARD
NC D+ T
T
Monitor
Battery
Type
Bluetooth
2
6-16mm(Red）
2
6-16mm（Black）
2
6-16mm
（Red）
0.75mm2
Fuse
3A
Fuse
40A
Fuse
50A
Alternator
G
-+
12V
HOUSE BATT.
Ⅰ
+12V -
STARTER
Ⅱ
Ground
Vehicle
Chassis
Ground
Vehicle
Chassis
-
Ground Vehicle Chassis
!
warning
Temperature
sensor
1. Install the charger as close as possible to the house battery.
2. The fuse needs to be connected close near the battery to protect the battery and cable.
3. In any case, make sure that the positive and negative terminal connections of the battery are not reversed or short-circuited,
otherwise it may cause serious accidents.
Terminal cable connections/function
Plug-in terminal: In a place with a narrow installation space, the wire can be unplugged and then re-inserted
The size of cable: 0.75 square or more
The wire stripping length is about 6mm
1. "T T": Temperature sensor input port, used to measure the temperature of the House/Leisure/Board battery.
Installation: Ensure that the temperature sensor is not affected by any heat source. It is recommended to install it on the negative
terminal of the HOUSE battery or install on the battery outer box.
Function: Temperature compensation for the charging voltage of the house battery under different ambient temperatures, for
example: the charging voltage will increase in winter, summer will reduce the charging voltage.
Battery protection: When the temperature is lower than -20℃or higher than +50℃, the charger limits the maximum charging current
to 10A . The charger can automatically identify whether the temperature sensor is connected, or is damaged,
short-circuited, or when an abnormal temperature is measured. The charger will automatically switch to the default
25°C for processing.

2. "D+" : Charging control signal ON / OFF
Connect the D+ signal wire to the D+ terminal of the vehicle alternator and control ON/OFF of the charger by starting/stopping the
alternator. This connection method is only suitable for new alternators with D+ output terminals. If there is no D+ signal generator on
the alternator, you can conect D+ signal the wire is to the cable that turns on with the ignition switch of the vehicle.
"D+" signal voltage range: 8V-16V
3. "NC": no function, no need to connect.
Battery type selection
5 Built-in battery types can be selected through the DIP switch. The charging parameters of each battery type can be found in the
following description. If the battery type in your application is not listed below, you need to contact the sales staff.
DIP Switch
Battery type
OFF
ON
GEL
1
ON
2
3
1
ON
2
3
Lead-acid
1
ON
AGM
1
ON
2
3
!NOTE
1.Wrong battery selection, all LED
indicators will flash once per second.
2.Battery selection must be set before
charging.
2
3
LiFePO4
1
ON
2
3
Lithium-ion(NCM)
1
ON
2
3
Instructions
1.Lithium battery charging
If you charge the lithium battery, you need to ensure that the lithium battery has a BMS (Battery Management System), and you
should to keep the battery temperature above 0°C for charging.
2. Lithium battery activation program
When the house battery connected is a lithium battery, when the lithium battery is in low voltage protection state, there will be no
voltage output. The charger can automatically activate the lithium battery to recharge. Activation conditions:
1. Starter battery voltage >11.5V 2. D+ signal voltage range: 10-16V
3. Battery parallel connection
It is allowed to charge two or more batteries of the same voltage, the same type, and the same capacity in parallel. The parallel
connection cable must be the same size cable as connected to the charger.

4. Reduced power charging
When the starting battery voltage is low, the charger will automatically reduce the current to charge
Start battery voltage
>12.6V
<12.35V
<12.2V
<12.05V
<11.9V
<11.7V
<11.5V
<11.2V
Charge current
30A
27A
24A
20.5A
17A
13.5A
10A
stop charging
Recovery voltage
-
>12.5v
>12.45v
>12.35v
>12.25v
>12.1v
>12v
>12.6v
Charge current
-
30A
27A
24A
20.5A
17A
13.5A
30A
LED indicators
Power-on self-check: all the indicators are on for 1 second, and then go out.
LED
OFF：
Status
No D+ signal, alternator is not working
Start battery
（yellow）
Flashing: Starter battery voltage <11.5V (1 time/ 5 seconds)
When starter battery <11.2V and stop charging, The voltage returns
to 12.5V, recharge during this period, the LED keeps flashing
Fast flashing: Starter battery voltage >16V (1 time/s)
ON：
OFF:
The starter battery voltage is normal
No charging
Charging
（Green）
Slow flashing: The battery temperature is too high or the lithium battery is below -
20 degrees (1 time/ 2 s)
Fast flashing: Over temperature inside the controller (1 time/1s)
ON:
OFF :
Short flashing:
Fast flashing:
ON:
Charging
No charging
Constant current stage (1time/5s)
Constant voltage stage (1 time/1s)
Full
Battery full
（Green）
House battery
（Red）
Slow flashing: House battery voltage is normal (1 time/5s)
Fast flashing: House battery voltage is over-voltage (1 time/1s)
ON:
House battery voltage is low-voltage
All LEDs are flashing
Battery selection error

Protection functions
Protection
House battery
over-voltage protection
Description
1. Battery voltage> over-voltage protection voltage: charging is off
2. Battery voltage> constant voltage value + 0.2V for 10 seconds: charging is off
3. Buzzer alarm: Beep-Beep-Beep, 1 minute
Battery voltage<Low voltage alarm voltage
Buzzer alarm: BeepBeep-BeepBeep-BeepBeep,1 minute
1. 11.5V-11.2V, reduce charging current to 10A
2. <11.2V, Turn off charging
Board battery
Low-voltage protection
Starter battery
Low-voltage protection
Over-power protection
The maximum charging current of the house battery 30A
Reverse polarity connection
protection
House battery reverse connection:
Fuse blown (inside)
Starter battery reverse connection: Fuse blown (inside)
Over-heat protection/recovery
(Internal temperature)
1. If the temperature is higher than 85℃, stop charging; when the temperature drops to
60℃, resumes charging
2. When the temperature is >80℃, the maximum charging current is reduced to 25A. When
the temperature returns to 65℃, charging will resume at 30A
3. Buzzer alarm: BeepBeep-Beep-BeepBeep-Beep, for 1 minute
Dimensions
unit：mm
147
139
5
.
8
8
8
1
1

Charging parameters
Battery type
Equalized charge
Boost charge
Float charge
GEL
-
14.3V
13.8V
High-voltage protection 15.5V
Low-voltage alarm
Constant voltage
charging time
Safety Charging Voltage
<-20℃or >50℃
High voltage recovery
voltage
Boost charge recovery
voltage
11V
2h
Lead-acid
14.6V
14.4V
13.5V
15.5V
11V
2h
AGM
14.8V
14.7V
13.5V
15.5V
11V
2h
LiFePO4
-
14.4V
13.8V
15.5V
11V
2h
Lithium-ion(NCM)
-
12.6V
12.5V
13.5V
9.3V
2h
12.8V
13.7V
13.2
12.8V
13.7V
13.2V
12.8V
13.7V
13.2V
13V
14.8V
13.2V
12V
12.8V
12V
Parameters
Model
House/Leisure/Board battery I
GEL,Lead-acid,AGM
LiFePO4
Lithium-ion (NCM)
Battery capacity
Battery voltage range
Starter battery Ⅱ
Starter battery voltage
Minimum recommended capacity
Starter battery Ⅱvoltage input range
Maximum charging power
Maximum charging current of the House battery
Effective D+ signal voltage range
Temperature compensation
House battery temperature sensor input "T T"
Self-consumption current
Weight
Dimensions
Operating temperature
Accessories
lyte 121230 lyte 121245
12V 12V
12.8V 12.8V
11.1V 11.1V
45-280AH 45-420AH
8V-16V 8V-16V
12V 12V
60AH 60AH
10.5-16V 10.5-16V
390W 585W
30A 45A
8-16V 8-16V
-3mv/℃/2V -3mv/℃/2V
YES YES
12mA 12mA
0.46 kg 0.68 kg
147×118×41 mm 147×145×41 mm
-20-50℃-20-50℃
Display Meter (MT-2)
Bluetooth Dongle (BT10)
Temperature Sensor (RTS)