BEIJING EPSOLAR TECHNOLOGY CO., LTD. Tel：+86-10-82894112 / 82894962 Website：www.epsolarpv.com/www.epever.com
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ViewStar AU series solar charge controller
1. Overview
Thank you for selecting the ViewStar AU series common positive solar charge
controller. The VS-A controller is a PWM charge controller with built in LCD display that
adopts the most advanced digital technique. The multiple load control modes enable it can
be widely used on solar home system, traffic signal, solar street light, solar garden lamp,
etc. The features are listed below:
Adopt high quality components of ST,IR and Infineon, make sure product using lifespan
Terminals have UL and VDE certification, the product is more safer and more reliable
Controller can work continuously at full load within the environment temperature range
from -25 to 55 ℃
3-Stage intelligent PWM charging：Bulk, Boost/Equalize, Float
Support 3 charging options: Sealed, Gel, and Flooded
LCD display design, dynamically displaying device’s operating data a nd worki ng
condition
Double USB design, the power supply charge for electronic equipment
With humanized button settings, operation will be more comfortable and convenient
Multiple load control modes
Energy statistics function
Battery temperature compensation function
Extensive Electronic protection
2. Product Features
①
LCD ⑤ Battery Terminals
②
MENU Button
⑥
Load Terminals
③
RTS* Port
⑦
SET Button
④
PV Terminals
⑧
USB Output Ports※
※ USB output ports provide the power supply of 5VDC/2.4A and have the short
circuit protection.
NOTE: Unplug the RTS, the temperature of battery will be set to a fixed
value 25ºC.
3. Wiring
(1) Connect components to the charge controller in the sequence as shown above and pay
much attention to the “+” and “-”. Please don’t insert the fuse or turn on the breaker during
the installation. When disconnecting the system, the order will be reserved.
(2)After power on the controller, check the LCD on. Otherwise please refer to chapter
6.Always connect the battery first, in order to allow the controller to recognize the system
voltage.
(3)The battery fuse should be installed as close to battery as possible. The suggested
distance is within 150mm.
(4) The VS AU series is a positive ground controller. Any positive connection of solar, load
or battery can be earth grounded as required.
NOTE: Please connect the inverter or other load that it has the large start
current to the battery rather than to the controller, if the inverter or other
load is necessary.
4. Operation
4.1 Button Function
Button
Function
MENU button
Browse interface
Setting parameter
SET button
Load ON/OFF
Clear error
Enter into Set Mode
Save data
4.2 LCD Display
Status Description
Item
Icon
Status
PV array
Day Night No charging
Charging
PV Voltage, Current ,Power
Battery
Battery capacity, In Charging
Battery voltage. current, temperature
Battery type
Load
Load ON
Load OFF
Load Voltage, Current, Load mode
Browse interface
NOTE：
1） When no operation, the interface will be automatic cycle, but the follow two interfaces
not be display.
2） Accumulative power zero clearing: Under PV power interface, press SET button and
hold on 5s then the value blink, press SET button again to clear the value.
3） Setting temperature unit: Under battery temperature interface, press SET button and
hold on 5s to switch.
Fault Indication
Status
Icon
Description
Battery over
discharged
Battery level shows empty, battery frame blink,
fault icon blink
Battery over
voltage
Battery level shows full, battery frame blink, fault
icon blink
Figure 2 Connection diagram
Figure 1 Characteristic
② ① ③ ④ ⑤ ⑥ ⑦
⑧
Optional Accessory:
Name: Remote Temperature Sensor
Model: RTS300R47K3.81A
Acquisition of battery temperature for undertaking
temperature compensation of control parameters, the
standard length of the cable is 3m (length can be
customized). The RTS300R47K3.81A connects to the port
③ on the controller.
※ Thank you for selecting ViewStar AU series solar charge
controller. Please read this manual carefully before using the
product.
BEIJING EPSOLAR TECHNOLOGY CO., LTD. Tel：+86-10-82894112 / 82894962 Website：www.epsolarpv.com/www.epever.com
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Battery
Overheating
Battery level shows current value, battery frame
blink, fault icon blink
Load failure
Load overload① ,Load short circuit
①When load current reaches1.02-1.05 times 1.05-1.25 times, 1.25-1.35 times and
1.35-1.5 times more than nominal value, controller will automatically turn off loads in 50s,
30s,10s and 2s respectively
4.3 Load mode setting
Operating Steps:
Under load mode setting interface, press SET button and hold on 5s till the number begin
flashing, then press MENU button to set the parameter, press SET button to confirm.
1**
Timer 1
2**
Timer 2
100
Light ON/OFF
2 n
Disabled
101
Load will be on for 1 hour
since sunset
201
Load will be on for 1 hour
before sunrise
102
Load will be on for 2 hours
since sunset
202
Load will be on for 2 hours
before sunrise
103～113
Load will be on for 3～13
hours since sunset
203～213
Load will be on for 3～13
hours before sunrise
114
Load will be on for 14 hours
since sunset
214
Load will be on for 14
hours before sunrise
115
Load will be on for 15 hours
since sunset
215
Load will be on for 15
hours before sunrise
116
Test mode
2 n
Disabled
117
Manual mode(Default load
ON)
2 n
Disabled
NOTE: Please set Light ON/OFF, Test mode and Manual mode via Timer1. Timer2
will be disabled and display "2 n".
4.4 Battery Type
Operating Steps
Under Battery Voltage interface, press SET button and hold on 5s then enter into the
interface of Battery type setting. After choosing the battery type by pressing MENU button,
waiting for 5s or pressing SET button again to modify successfully.
Battery Type
①Sealed (Default) ②Gel ③Flooded
NOTE: Please refer to the battery voltage parameters table for the different battery
type.
5. Protections
Protection
Conditions
Status
PV Reverse
Polarity
When the battery is correct connecting, the
PV can be reversed.
The controller is not
damage
Battery Reverse
Polarity
When the PV is not connecting, the battery
can be reversed.
Battery Over
Voltage
The battery voltage reaches to the OVD
Stop charging
Battery Over
Discharge
The battery voltage reaches to the LVD
stop discharging
Battery Over
Discharge
The battery voltage reaches to the LVD
stop discharging
Battery
Overheating
Temperature sensor is higher than 65℃
Output is OFF
Temperature sensor is less than 55℃
Output is ON
Controller
Overheating
Temperature sensor is higher than 85℃
Output is OFF
Temperature sensor is less than 75℃
Output is ON
Load Short
Circuit
Load current ≥2.5 times rated current
One short circuit, the output is OFF 5s；
Two short circuit, the output is OFF 10s；
Three short circuit, the output is OFF 15s；
Four short circuit, the output is OFF 20s；
Five short circuit, the output is OFF 25s；
Six short circuit, the output is OFF
Output is OFF
Clear the fault:
Restart the controller
or wait for one
night-day cycle
(night time>3 hours).
Load Overload
Load current ≥2.5 times rated current
1.02-1.05 times, 50s,
1.05-1.25 times, 30s
1.25-1.35 times,10s
1.35-1.5 times 2s
Output is OFF
Clear the fault:
Restart the controller
or wait for one
night-day cycle
(night time>3 hours).
Damaged RTS
The RTS is short-circuited or damaged
Charging or
discharging at 25℃
6. Troubleshooting
Faults
Possible reasons
Troubleshooting
The LCD is off
during daytime when
sunshine falls on PV
modules properly
PV array
disconnection
Confirm that PV wire connections
are correct and tight
Wire connection is
correct, LCD not
display
1) Battery voltage is
lower than 9V
2) PV voltage is less
than battery voltage
1) Please check the voltage of
battery. At least 9V voltage to
activate the controller
2) Check the PV input voltage
which should be higher than
battery’s
Interface
blink
Battery over voltage
Check if the battery voltage is
higher than OVD point (over
voltage disconnect voltage), and
disconnect the PV.
Interface
blink
Battery
over discharged
When the battery voltage is
restored to or above LVR point
(low voltage reconnect voltage),
the load will recover
Interface
blink
Battery Overheating
The controller will automatically
turn the system off. But while the
temperature decline to be below
50 ºC, the controller will resume.
Interface
blink
Over load or Short
circuit
Please reduce the number of
electric equipments or check
carefully loads connection.
8. Disclaimer
This warranty does not apply under the following conditions:
1) Damage from improper use or use in an unsuitable environment.
2) PV or load current, voltage or power exceeding the rated value of controller.
3) User disassembly or attempted repair the controller without permission.
4) The controller is damaged due to natural elements such as lighting.
5) The controller is damaged during transportation and shipment.
7.Technical Specifications
Item
VS1024AU
VS2024AU
VS3024AU
VS4524AU
VS6024AU
Nominal system voltage
12/24VDCAuto
Battery input voltage range
9V～32V
Rated charge/discharge current
10A@55℃
20A@55℃
30A@55℃
45A@55℃
60A@55℃
Max. PV open circuit voltage
50V
Battery type
Sealed(Default) / Gel / Flooded /User
Equalize Charging Voltage※
Sealed:14.6V/ Gel: No/ Flooded:14.8V/User:9-17V
Boost Charging Voltage※
Sealed:14.4V/ Gel:14.2V/ Flooded:14.6V/User:9-17V
Float Charging Voltage※
Sealed/Gel/Flooded:13.8V/User:9-17V
Low Voltage Reconnect
Voltage※
Sealed/Gel/Flooded:12.6V/User:9-17V
Low Volt. Disconnect
Voltage※
Sealed/Gel/Flooded:11.1V/User:9-17V
Self-consumption
≤10mA/12V;≤18mA/24V
Temperature compensation
coefficient
-3mV/℃/2V（25℃）
Charge circuit voltage drop
≤0.29V
Discharge circuit voltage drop
≤0.16V
LCD temperature range
-20℃～+70℃
Working environment
temperature
-25℃～+55℃(Product can work continuously at full load)
Humidity range
≤95%, N.C.
Enclosure
IP20
Grounding
Common Positive
USB input
5VDC/2.4A
Overall dimension
142x85x41.5mm
160x94.9x49.3mm
181x100.9x59.8mm
194x118.4x63.8mm
214x128.7x72.2mm
Mounting dimension
130x60mm
148x70mm
172x80mm
185x90mm
205x100mm
Mounting hole size
Φ4.5mm
Φ5mm
Φ5mm
Φ5mm
Terminals
4mm
2
10mm
2
16mm
2
16mm
2
25mm2
Net weight
0.22kg
0.35kg
0.55kg
0.76 kg
1.02kg
※Above the parameters are in 12V system at 25℃, twice in 24Vsystem
Any changes without prior notice! Version number：V1.0
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