WESTECH EPIPC-COM Series User manual

INSTRUCTION MANUAL
----------For SHS controller, with remote meter
----------Controller: EPIPC-COM series
----------Meter: MT-2
CHARACTERISTICS
LCD
all system parameters as digital values
system status as symbols
Intelligent software control
PWM charging mode
Set three different battery types
Battery Ah setting
Over-load, short circuit, reverse polarity protection，electronic fuse
Temperature compensation setting
Modify parameters using four buttons

TECHNICAL INFORMATION
Type
EPIPC-COM(10A)
EPIPC-COM(20A)
System voltage
12V/24V AUTO WORK
Rated charging current
10A
20A
Rated load current
10A
20A
Overload
short circuit protection
1.25 X rated load current for 60 seconds or 1.5 X for 5 secs
≥3 times of rated load current
Self consumption
≤6 mA
Charging circuit voltage drop
≤0.26V
Load circuit voltage drop
≤0.15V
Work temperature
Industrial(I series)：-35℃to +55℃
Temperature compensation
0-10mv/℃/2V
Charging mode
Pulse Width Modulation (PWM)
Remote meter LCD specification
Working current
Strong backlight on < 23mA，15 seconds
Low backlight on < 20mA，15 seconds
Backlight and LED indicator off < 15mA
Work temperature
-10℃to +40℃
Communication port
RJ45（8PIN）
Communication cable
1.5 meters with supplied cable
10 meters maximum

INSTALLATION
Connect the individual components according to the symbols,
they are solar panel, battery and load.
Follow the order indicated i.e. connect the battery first.
Install the controller near the battery. The installation environment should be dry, preferably indoors. If for
outdoor use, provide a waterproof and dustproof enclosure. The cable should be as short as possible and have a
suitable cable diameter size to minimize loss, e.g. use 2.5 mm2at 10A; use 5 mm2at 20A.
1. Mount the controller and meter to a surface. Allow space above and below the controller for air flow.
Connect the controller and meter via communication cable.
2. Connect the battery to the controller. Note the plus and minus. If connection is correct, the battery indicator
will be on.
Note : We strongly recommend connecting a fuse in series with the battery to avoid short circuit. The fuse
rating should be 1.5 to 2 times controller rated current.
3. Connect the solar panel to the charge controller, note plus and minus. If there is sunshine, the charging
indicator should be on.
Note: the voltage generated by the solar panel in sunlight could be dangerous.
4. Connect the load to the charge controller (note plus and minus). Press ON/OFF button to ensure that load
operates.
5. Unit has a built in temperature sensor, which measures ambient temperature. Battery regulation is
adjusted accordingly.
6. An optional Remote Temperature Sensor (RTS) is available to monitor battery temperature and adjust
charging parameters.
Note: where is no RTS, the controller uses the local temperature sensor. When the RTS is connected the
controller will automatically switch to RTS.

MECHANICAL DRAWING
CONTAINS
Wall mounting board, can be mounted in or on the wall. With 1.5 meter cable
REMOTE METER DISPLAY
The two LED indicators above the LCD show that battery is charging, and a red indicates error conditions.
The LCD has three different brightness levels. After any button is pressed the display will be in high brightness
and backlight. After 15 seconds the display will switch to a lower brightness, and after an additional 15 the
backlight turns off.
The LCD has a backlight feature for easy reading in low light levels. To save power, the backlight automatically
turns off after 15 seconds.
Solar icon
Battery icon
Load icon
Error indicator
Setting icon
Unit indicator
Data indicator

REMOTE METER OPERATION INSTRUCTION
The button switches from left to right (K1 to K4) are: Set, Left, Right and ON/OFF/ESC
1. The meter display in sequential order:
Solar panel voltage and charging current, then Battery voltage and charging current minus load current, then
Load voltage and Load current, then Battery capacity in AH and battery temp., then battery capacity percentage
and temp. compensation, then battery capacity in AH and battery type, then charge accumulation in AH and
charge accumulation in WH then discharge accumulation in AH and discharge accumulation in WH. Use K2, K3, or
Left, right button for repeating any data set. The following picture shows what the data looks like.
is the “setting” icon. It shows when setting status, and disappears when reading status.
2. Data setting operation:
Reading status, press K1/SET to “setting” status, press K2, K3 to modify data. K1 : return to reading status and
save data. K4 : return to reading status without saving data. Battery voltage and current can’t be set.
Operation shows as following picture.
3. Data setting instruction
Battery capacity: Battery capacity can be set from 10AH to 900AH, the default value is 200AH. The value should
be near or equal to the real capacity. While display shows battery capacity and temp., press K1 into “setting”
mode, modify the data through K2, K3. Battery capacity will go up/down 10AH, press K1 for saving data and
return to the reading status, or press K4 for return without saving.
The following data can be adjusted: battery capacity AH, battery temperature compensation,
battery type. On read status, press K1/SET for setting data.

Battery temp. compensation: Temp. compensation data modify ranges from 0 to 10mV/Cell/oC, while the data is
0, there is no temp. compensation function. While displaying battery capacity percentage and temp.
compensation, press K1 to go to “setting” mode, modify the data through K2, K3. The temp. compensation will
be up/down 1 mV/Cell/℃.
Battery type: battery type has three options: SEL-sealed battery, GEL- gel battery, FLD- flooded battery. While
displaying battery capacity and battery type, press K1 to go into “setting” mode, choosing suitable battery type
through K2, K3.
4. Other operation:
Delete accumulate data: while displaying charging / discharging accumulation, press K4/ESC, then press K1/SET,
the data will be deleted. The controller will automatically delete the data when it reaches 999 times
accumulation. Within 24 hours, the accumulation start point is the solar panel voltage over 8V.
OTHER INSTRUCTION
Error icon instruction:red flashing on error status. Please check the load connection, press K4 for delete error
icon.
1. When load current 1.25 times rated current and less than 1.5 times rated current, load will be turned off
automatically after 60 seconds.
2. When load current over 1.5 times rated current but less than short circuit, load will go off automatically after
5 seconds.
3. When the load current exceeds 3 times rated current, the short circuit protection turns off the load.
LED indicator:
Green on when solar panel is charging battery. Off indicates no charging.
Red on when there is error. Off in normal status.
Telecommunication port:
The Telecommunication port connects the remote display to the controller. If there is no communication, but
the remote is receiving power, it will display all the graphical symbols. If a key is pressed and the graphic
symbols remain, there is no communications. The display will resume normal operation when there is
communication.
If the display data is bad check the following:
1. Is the controller operational? If normal charge and discharge is working the problem is in the display /
cable.
2. Check for correct cable and check connection.
3. Check for strong interference near cable.
4. A cable that is too long could also cause problems.
Battery capacity strip flash:
Each strip represents 20% of battery capacity.
Note: the calculation is based on fully charged battery voltage as 100%, and over discharge as 0%. The
calculation is based on battery voltage, not the actual battery capacity.

Data updating:
Serial communication occurs every 10 seconds between control module and display module, so the data update
takes 10-20 seconds.
Battery Charging AH:
Battery Charging AH value is the total running time of charging current. The computer accumulates this data for
each minute of operation. The data is not accurate while the charge current is below 0.1A.
Battery Discharging AH:
Battery Disharging AH value is the total running time of load current. The computer accumulates this data for
each minute of operation. The data is not accurate while the discharge current is below 0.1A.
Charging accumulation WH:
Charging accumulation is the product of battery voltage, charging current and time, displayed in Watt hours.
Discharging accumulation WH:
Discharging accumulation is the product of battery voltage, discharge current and time, displayed in Watt hours.
Westech-Solar Energy GmbH
E-mail：[e-mail]
Website：www.westech-solar.com