WESTECH VS Series User manual

VS series
—— Solar Charge Controller
Thank you very much for selecting our product!
This manual offers important information and suggestions with respect
to installation, use and troubleshooting, etc. Please read this manual
carefully before using the product and pay attention to the safety
recommendations in it.
INSTRUCTION
MANUAL

—— Solar Charge Controller
Nominal system voltage
12V∕24V∕48V
Nominal charge / discharge current
10A∕20A∕30A∕40A∕50A∕60A
VS

Contents
1 Important Safety Information ............................................................................1
2 General Information..........................................................................................2
2.1 Product Overview.................................................................................2
2.2 Product Features...................................................................................3
2.3 Optional Accessories ............................................................................5
3 Installation Instructions.....................................................................................6
3.1 Mounting..............................................................................................6
3.2 Wiring..................................................................................................8
4 Operation........................................................................................................11
4.1 PWM Technology...............................................................................11
4.2 Battery Charging Information.............................................................11
4.3 HMI Interface.....................................................................................13
4.4 Operation and Displaying of Controller ..............................................15
System Monitor Interface...............................................17
Device Setting Interface.................................................20
Charging and Discharging Parameters Setting Interface.22
Load Control Interface...................................................25
Nominal Parameter Interface..........................................31
Factory Reset Interface..................................................32
5 Protection, Troubleshooting and Maintenance.................................................34
5.1 Protection...........................................................................................34
5.2 Troubleshooting..................................................................................35
5.3 Maintenance.......................................................................................38
6 Warranty.........................................................................................................39
7 Technical Specifications..................................................................................40

1
1 Important Safety Information
Save These Instructions
This manual contains important safety, installation and operating instructions.
The following symbols are used throughout this manual to indicate potentially dangerous
conditions or mark important safety instruction, please take care when meeting following
symbols.
WARNING: Indicates a potentially dangerous condition.
Use extreme caution when performing this task.
CAUTION: Indicates a critical procedure for safe and
Proper operation of the controller.
General Safety Information
Read all of the instructions and cautions in the manual before beginning installation.
There are no user serviceable parts inside the controller. Do not disassemble or attempt
to repair it.
Install external fuses/breakers as required.
Disconnect the solar module and fuse/breakers near to battery before installing or
adjusting the controller.
Do not allow water to enter the controller.
Confirm that power connections are tightened to avoid excessive heating from loose
connection.

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2 General Information
Thank you for selecting VS series solar charge controller that adopts the most advanced
digital technique, displays on the LCD and operates fully automatically. The Pulse
Width Modulation (PWM) battery charging and the unique control technology can
greatly increase the lifetime of battery. It has various unique functions and easy to use.
2.1 Product Overview
The controller is for off-grid solar system, and protects the battery from being over
charged by the solar module and over discharged by the loads. The charging process has
been optimized for long battery life and improved system performance. The
comprehensive self-diagnostics and electronic protection functions can prevent damage
from installation mistakes or system faults.
Features:
32 bit MCU with high speed and high performance
12 bit A/D high-precision sampling to ensure accuracy
Excellent EMC design
Nominal system voltage automatic recognition
High efficient Series PWM charging, increase the battery lifetime and improve the solar
system performance
Use MOSFET as electronic switch, without any mechanical switch
Widely used, automatically recognize day/night
Adopt graphics dot-matrix LCD screen and HMI (human-machine interface) with 4
buttons, integrated menu displaying and operation
Humanized design of browser interface, undertake every operating conveniently
Full control parameters setting and modification, diversified load control mode
Gel, Sealed and Flooded battery type option
Adopt temperature compensation, correction algorithm for charging and discharging
parameters automatically and improve the battery lifetime
Electronic protection: Overheating, over charging, overdischarging, overload, and short circuit.
Reverse protection: any combination of solar module and battery

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2.2 Product Features
1
3
6
7
8
9
2
10
4
5
1
2
3
4
5
10
6
7
8
9
VS1024(N) / VS2024(N)
VS2048(N) / VS30**(N) / VS40**(N) / VS50**(N) / VS60**(N)

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1–Local temperature sensor
It is used for acquisition of ambient temperature to undertake temperature compensation
of charging and discharging parameters, when the remote temperature sensor is not
connected
2–Fault LED indicator
An LED indicator that shows faults of solar system
3–Charging LED indicator
An LED indicator that shows charging status
4–Liquid crystal display (LCD)
Monitoring interface for solar system parameters
5–Combined-type buttons
4 combined-type buttons accomplish all operations to controller
6–Communication interface
Connect remote displaying unit MT-100 (Optional Accessories)
7–Load terminals
Connect loads
8–Battery terminals
Connect batteries
9–Solar module terminals
Connect solar modules
10 –Remote temperature sensor interface
Connect remote temperature sensor TS-R (Optional Accessories) to acquire of ambient
temperature for undertaking temperature compensation of charging and discharging
parameters, when it is in connection.

5
2.3 Optional Accessories
1. Remote Meter(Model：MT-100)
The digital Remote Meter displays system operating information, error indications, and
self-diagnostics read-out. Information is displayed on a backlit LCD display. The large
numerical display and icons are easy to read and large buttons make navigating the meter
menus easy. The meter can be flush mounted in a wall or surface mounted using the
mounting frame (included). The MT-100 is supplied with 1.5m of cable and a mounting
frame. The MT-100 connects to the RJ45 port on the VS.
2. Remote temperature sensor (Model：TS-R)
Acquiring of ambient temperature for undertaking temperature compensation of charging
and discharging parameters, the standard length of the cable is 2m (can be customized if
want longer or shorter). The TS-R connects to the 2ERJ—3.81 port on the VS.

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3 Installation Instructions
3.1 Mounting
Read through the entire installation section first before beginning installation.
Be very careful when working with batteries. Wear eye protection. Have fresh water
available to wash and clean any contact with battery acid.
Uses insulated tools and avoid placing metal objects near the batteries.
Explosive battery gasses may be present during charging. Be certain there is sufficient
ventilation to release the gasses.
Avoid direct sunlight and do not install in locations where water can enter the controller.
Loose power connections and/or corroded wires may result in resistive connections that
melt wire insulation, burn surrounding materials, or even cause fire. Ensure tight
connections and use cable clamps to secure cables and prevent them from swaying in
mobile applications.
Use with Gel, Sealed or Flooded batteries only.
Battery connection may be wired to one battery or a bank of batteries. The following
instructions refer to a singular battery, but it is implied that the battery connection can
be made to either one battery or a group of batteries in a battery bank.
Select the system cables according to 3A/mm2current density
NOTE: When mounting the controller, ensure free air through the
controller heat sink fins. There should be at least 6 inches (150 mm)
of clearance above and below the controller to allow for cooling. If
mounted in an enclosure, ventilation is highly recommended.
WARNING: Risk of explosion! Never install the controller in a
sealed enclose with flooded batteries! Do not install in a confined
area where battery gassed can accumulate.

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Step 1: Choose Mounting Location
Locate the controller on a vertical surface protected from direct sun, high temperature,
and water. And make sure good ventilation.
Step 2: Check for clearance
Place the controller in the location where it will be mounted. Verify that there is sufficient
room to run wires and that there is sufficient room above and below the controller for air
flow.
Step 3: Mark Holes
Use a pencil or pen to mark the four (4) mounting hole locations on the mounting surface.
Step 4: Drill Holes
Remove the controller and drill 4mm holes in the marked locations.
Step 5: Secure Controller
Place the controller on the surface and align the mounting holes with the drilled holes in
step 4.
Secure the controller in place using the mounting screws.
Warm air
Cool air
150mm(5.9inches)
150mm(5.9inches)