Voltech SCL-1550L User manual

12V 15A
MPPT Solar Controller
Lithium Battery (LiFePO4) Compatible
SCL-1550L
User Manual
CE, Rohs, ISO9001:2015
Subject to change without notice.

Dear Clients,
Thanks for selecting the MPPT series solar controller. Please take the time to read this user manual, this
will help you to take advantage of controller’s new features. This manual gives important recommendations
for installation and so on. Read it carefully in your own interest please.
1.Description of Function
MPPT series Solar controller charging e󰀩ciency
is about 20% higher than traditional PWM control-
lers.
• Innovative Max Power Point Tracking (MPPT)
technology, tracking e󰀩ciency >99.9%
• Full digital technology, high charge conversion
e󰀩ciency up to 97.5%,
• Preprogrammed for Lithium (LiFePO4) type
batteries.
• Also suitable for AGM/Sealed Batteries.
• IP67, Strong and durable aluminum case
• Full automatic electronic protect function
2.Safety Instruction and Waiver of Liability
2.1 Safety
1. The solar charge controller may only be used
in PV systems in accordance with this user man-
ual and the specs of other module manufacturers.
No energy source other than solar panels (PV),
may be connected to the solar charge controller.
2. Batteries store a large amount of energy,
never short circuit a battery under all circumstanc-
es. We strongly recommend connecting a fuse
directly to the battery to protect any short circuit at
the battery wiring.
3. Batteries can produce ammable gases.
Avoid making sparks, re or any naked ame.
Make sure that the battery room is ventilated.
4. Avoid touching or short circuiting wires or
terminals. Be aware that the voltages on special
terminals or wires can be as much as twice the
battery voltage. Use isolated tools, stand on dry
ground, and keep your hands dry.
5. Keep children away from batteries and the
charge controller.
2.2 Liability Exclusion
The manufacturer shall not be liable for damages,
especially on the battery, caused by use other
than as intended or as mentioned in this manual
or if the recommendations of the battery manufac-
turer are neglected. The manufacturer shall not be
liable if there has been service or repair carried
out by any unauthorized person, unusual use,
wrong installation, or bad system design.
3.Dimensions (Unit:mm)
4. Installation
3.1 Controller dimensions
Connection diagram example
1. Connect battery with the corresponding red
(positive) and black(negative) cables.
2. Connect panel with the corresponding red
(positive) and black/green (negative) cables, the
load will be o󰀨 after 5s, and the controller begins
charging.
3. Refer to 6.1 LED indications and Faults &
Alarms to conrm the LED display status.
• Make sure the wire length between battery and
controller is as short as possible.
• Recommended minimum wire size:4 mm².
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5.Starting up the controller
5.1 Self Test
As soon as the controller is connected to the
battery, it starts self test. If all OK it then changes
to normal operation.
5.2 Battery Type
This Controller is pre-set for Lithium (LiFePO4),
But can also be used on AGM/GEL, & other types
of Battery which require a Boost Voltage of 14.4V.
As there is no actual Float Stage the Controller
will resume Boost Charging when Battery Voltage
falls to 13.5V as specied.
6.LED Indications and Faults & Alarms
6.1 LED Display Explanation (LiFePO4)
LED Status Function
Green
LED
On Ready/Battery Full
Fast ash
(0.1/0.1s) Charging to CVT
Flash (0.5s/0.5s) Boost Charging
Slow ash (0.5/2s) Charging nal stage
Yellow
LED
O󰀨 Over voltage protection
On Battery is normal
Slow ash (0.5/2s) Battery voltage is low
Fast ash
(0.1/0.1s) Low voltage protection
Red LED
O󰀨 Work normal (Standard
version)
Flash (0.5s/0.5s) Over temperature
Fault Status Reason Remedy
High
voltage
at battery
terminal
Over
voltage
protec-
tion
High battery
voltage
>15.5V
Check if other sourc-
es overcharge the
battery. If not, control-
ler is damaged.
Battery
wires or
battery fuse
damaged,
battery has
high resis-
tance.
Check battery wires,
fuse and battery.
Can’t re-
congnize
system
voltage
All LED
fast
ashing
Battery
voltage is
not in right
range
Charge or discharge,
make battery voltage
in the right range.
Battery
is empty
after a
short
time.
Low
voltage
protec-
tion.
Battery
has low
capacity
Change battery
Battery
can’t be
charged
Green
LED is
on
PV panel
fault or
reverse
connection
Check panels and
connection wires
6.2 Faults & Alarms
7. Technical Data
Item SCL-1550L
System Voltage 12V
Max Charging Current 15A
Max volt on Battery Terminal 25V
Battery Type Lithium (LiFePO4)
Charging Voltage target 14.4V
Charging Voltage recovery 13.5V
Max volt on PV terminal (Voc) 35V
Max input power (Watts) 200W
Max tracking e󰀩ciency >99.9%
Max charge conversion 96.50%
Self-consumption 6mA
Ambient temperature -35°~+60°C
Ambient humidity 0~100%RH
Protection degree IP67
Max Altitude 4000m
Dimensions 85.8*81*23.1mm
Weight 260g
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E: [email protected]
W: www.electroparts.com.au Rev. 1.0
9/11/23