Upne-Tech SLAC-MH User Manual

SLAC-MH Solar street light controller
Thank you very much for choosing our product. This product manual
provides important information and advices for product installation, use
and troubleshooting. Before using this product, please read carefully and
thoroughly.
SLAC-MH is specially designed for small home solar systems with low
cost and high performance. It has a number of outstanding features:
The controller adjusts itself automatically to 12V or 24V system voltage.
Sophisticated programmable nightlight function.
Clear readable LED display of the state of charge.
4 stage charging(Main,boost, equalization, float) for flooded battery, 3
stage charging(Main,boost, float) for sealed battery.
Enclosed by aluminum shell and potted by epoxy with high thermal
conductivity. Protection grade reaches IP68.
Safety recommendations
Recommend a wire diameter: SLAC -MH5A/10A: 1.5 mm²; SLAC -
MH15A: 2.5 mm ²,ensure the battery and the controller between the
cable length as short as possible, to prevent controller misjudge battery
voltage.
Connect the controller by following steps to avoid installation faults.
1. Connect the wire to the controller, then to the battery.
2. Connect the wire to the controller, then to the photovoltaic modules.
3. Connect the wire to the load, then to the controller.
（3） （1）
Starting up the controller:
Self Test
As soon as the controller is supplied with power either from the battery or
the solar array, it starts a self test routine. Then the display changes to
normal operation.
System Voltage
The controller adjusts itself automatically to 12V or 24 V system
voltages. As soon as the voltage at the time of start-up exceeds 20.0V,
the controller assumes a 24V system. If the battery voltage is not
within the normal operation range at start-up, a status display according
to the section ERROR DESCRIPTION occurs.
LED Status and Display
SLAC-MH Controller has five LEDs. One green LED is for charge
display, three yellow LEDs are for the state of charge display, and one
red LED is for the status of load display.
Normal operation Description
LED Status
On
Slow flash
Green
Fast flash
LED
Off
Yellow Yellow LED 1(L) on
User Manual
（2）
Function
Main charge during daytime
Float charge
Equalization charge
Controller connected to battery, night
detected.
Battery power low
LED Yellow LED 2(M) on
Yellow LED 3(H) on
Off
Red
LED
Flash
Error Description
Indication
Loads are not
supplied.
Battery is low
after short
time.
Battery is not
being charged
during
daytime.
Safety Features
PV terminals
Reverse 24V system: no
polarity 12V system: yes
Short circuit Protected
Over current Protected
Reverse
Protected
charge
Over voltage Max. 55V
Under voltage No effect
When over temperature occurs, the controller will
Over reduce the charging current. If the temperature of
temperature controller reaches a high level, the load will
automatically be switched off.
(1) Controller can protect itself, but load might be damaged.
(2) We strongly recommend that add a fuse between battery and controller.
The battery may be permanent damaged when short circuit occurs.
(3) > 200% rated current: Load will be switched off with 3s delay.
Warning: Two or more error conditions at the same time may cause
damage to the controller. Always remove the present fault condition
before next operation
1
Battery power medium
Battery power high
Normal operation
Overload or Short-circuit of load
Cause Corrective action
Load will reconnect as
Battery is low
soon as battery is
（Red LED on）
recharged
Switch off all loads.
Over current /
Remove short circuit.
Short circuit of
Controller will switch on
loads（Red LED
load automatically after
flashing）
max 1 minute.
Battery voltage Check if other sources
too high overcharge the battery. If
(>15.5 / 31.0 V) not, controller is damaged
Battery wires or
battery fuse Check battery wires, fuses
damaged, battery and battery. Remove
has high faults.
resistance
Battery has low
capacity（Red
Replace the battery.
LED on）
Solar array faulty
or wrong polarity
Check solar array and
（Green LED
wiring. Remove faults.
off）
Battery terminals
Protected
Protected (with fuse
on battery) (3)
Protected
No effect
Max. 55V
No effect
Load
terminals
Protected
Protected
Switches off
with
a delay (3)
No effect
Switches off
with a
delay
Switches off
above
15.5/31.0 V