APT Inverex S1200 XP Solar User manual

Model No.: S1200 XP Solar
S2400 XP Solar
720W/ 1440W
V. 1.0
Quick Guide

Table of Contents
1. Introduction...................................................................................................................................................1
2. Important Safety Warning (SAVE THESE INSTRUCTIONS)......................................................................1
3. Product Overview.........................................................................................................................................2
4. Installation.....................................................................................................................................................2
5. Operation.......................................................................................................................................................5
6. Trouble Shooting ........................................................................................................................................12
7. Specifications .............................................................................................................................................13

1
1. Introduction
Thank you for purchasing the solar inverter. This simple solar inverter is designed to power your home
appliances or precious 3C electronics. It also can handle motor-type loads with high surge power such as
vacuums, small freezers, or drills. With built-in solar charger, it can convert solar power to battery power and
provide continuous power to connected equipment during night time.
2. Important Safety Warning (SAVE THESE INSTRUCTIONS)
Before using the inverter, please read all instructions and cautionary markings on the unit, this
manual and the batteries.
General Precaution-
CAUTION! The unit is designed for indoor use. Do not expose this unit to rain, snow or liquids of any type.
CAUTION! To reduce risk of injury, only use qualified batteries from qualified distributors or manufacturers.
Any unqualified batteries may cause damage and injury. Do NOT use old or overdue batteries. Please check the
battery type and date code before installation to avoid damage and injury.
WARNING! It's very important for system safety and efficient operation to use appropriate external battery
cable. To reduce risk of injury, external battery cables should be UL certified and rated for 75°C or higher. And
do not use copper cables less than 10AWG. Below is the external battery cable reference according to system
requirements.
CAUTION! Do not disassemble the inverter. Contact with the qualified service center when service or repair is
required.
WARNING! Provide ventilation to outdoors from the battery compartment. The battery enclosure should be
designed to prevent accumulation and concentration of hydrogen gas at the top of the compartment.
CAUTION! Use insulated tools to reduce the chance of short-circuit when installing or working with the inverter,
the batteries, or other equipments attached to this unit.
CAUTION! For battery installation and maintenance, read the battery manufacturer's installation and
maintenance instructions prior to operating.
Personnel Precaution -
CAUTION! Careful to reduce the risk or dropping a metal tool on the batteries. It could spark or short circuit the
batteries and could cause an explosion.
CAUTION! Remove personal metal items such as rings, bracelets, necklaces, and watches when working with
batteries. Batteries can produce a short circuit current high enough to make metal melt, and could cause severe
burns.
CAUTION! Avoid touching eyes while working near batteries.
CAUTION! Have plenty of fresh water and soap nearby in case battery acid contacts skin, clothing, or eyes.
CAUTION! NEVER smoke or allow a spark or flame in vicinity of a battery.
CAUTION! If a remote or automatic generator start system is used, disable the automatic starting circuit or
disconnect the generator to prevent accident during servicing.
Conventions used:
WARNING! Warnings identify conditions or practices that could result in personal injury;
CAUTION! Caution identify conditions or practices that could result in damaged to the unit or other
equipment connected.

2
3. Product Overview
4. Installation
NOTE: Before installation, please inspect the unit. Be sure that nothing inside the package is damaged.
Mounting the unit
The unit ONLY can be mounted vertically to a wall surface.
Please follow below steps:
1. Turn off the unit before mounting.
2. Select an appropriate mounting location. Use a horizontal line and the
length of the line must be 80 mm and mark the two ends on the wall.
(see right chart)
3. Drill two marks by screws.
4. Mount the unit by positioning the key-hole slots over the mounting screws.
Connect to Utility and Charge
Plug in the AC input cord to the wall outlet. The unit will automatically charge the
connected external battery even though the unit is off.
Connect External Battery
Step 1- Take away the cover of external battery terminal.
Step 2- Following battery polarity guide printed near the battery terminal!
Place the external battery cable ring terminal over the battery terminal.
RED cable to the positive terminal (+);
BLACK cable to the negative terminal (-).
WARNING! Please use the appropriate battery cable. Please refer to Important Safety Warnings Section
for the details.
Step 3- Tight the battery cables with the M5 nuts. Do NOT place anything between the flat part of battery
terminal and the battery cable ring terminal, or overheating may occur. (See Fig. 1)
Fig. 1
Step 4- Install a DC Breaker in a positive battery line. The rating of the DC Breaker must be according to the
inverter's battery current (75 Amp). Keep the DC breaker off. (see Fig. 2)
Step 5- Connect battery cables to the external batteries. Note: For the user operation safety, we strongly
recommend that you should use tapes to isolate the battery terminals before you start to operate the unit.
1) Single battery connection (Refer to Fig. 2): When using a single battery, its voltage must be equal to
the Nominal DC Voltage of the unit (see below Table 1).
Power switch
Status indicators (please see the
Operation section for the details)
LCD display
Output receptacles
AC input
Input circuit breaker
External battery connectors
Solar panel terminal

3
Fig. 2
2) Multiple batteries in series connection(Refer to Fig. 3): All batteries must be equal in voltage and
amp hour capacity. The sum of their voltages must be equal to the nominal DC Voltage of the unit.
Fig 3
3) Multiple batteries in parallel connection(Refer to Fig. 4): Each battery's voltage must be equal to the Nominal
DC Voltage of the unit.
Fig 4
Step 6- Make sure to connect the polarity of battery side and the unit correctly.
Positive pole (Red) of battery to the positive terminal (+) of the unit.
Negative pole (Black) of battery to the negative terminal (-) of the unit.
Step 7- Put the covers back to the external battery terminals.
Step 8- Take the DC breaker on.
Connect to Solar Panel
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module
connection. To reduce risk of injury, please use the proper recommended cable size as below.
Typical Amperage
Gauge
Torque Value
50A
8 AWG
1.4~1.6 Nm
Step 1- Connect one cable to the positive (+) pole of solar panel and solar charger positive (+) terminal.
Step 2- Connect the other cable to the negative (-) pole of solar panel and solar charger negative (-) terminal.
Solar Panel Connection
Table 1
Model
Nominal Battery DC Voltage
S1200
12 VDC
S2400
24 VDC

4
PV Module Selection:
When selecting proper PV modules, please be sure to consider below requirements first:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
INVERTER MODEL
S1200
S 2400
Charging Current (PWM)
50Amp
System DC Voltage
12Vdc
24Vdc
Operating Voltage Range
15~18Vdc
30~32Vdc
Max. PV Array Open Circuit Voltage
40Vdc
60Vdc
2. Max. Power Voltage (Vmpp) of PV modules should be close to best Vmp of inverter or within Vmp range to
get best performance. If one PV module cannot meet this requirement, it’s necessary to have several PV
modules in series connection. Refer to below table.
Model
Best Vmp
Vmp range
S1200
15Vdc
15V~18V
S2400
30Vdc
30V~32V
Note: * Vmp: panel max power point voltage.
The PV charging efficiency is maximized while PV system voltage is close to Best Vmp.
Maximum PV module numbers in Series: Vmpp of PV module * X pcs ≒Best Vmp of Inverter or Vmp
range
PV module numbers in Parallel: Max. charging current of inverter / Impp
Total PV module numbers = maximum PV module numbers in series * PV module numbers in
parallel
Take S1200 inverter as an example to select proper PV modules. After considering Voc of PV module not
exceeds 40Vdc and max. Vmpp of PV module close to 15Vdc or within 15Vdc ~ 18Vdc, we can choose PV
module with below specification.
Maximum Power (Pmax)
85W
Max. PV module numbers in series
1 17.6 x 1 ≒15 ~ 18
Max. Power Voltage Vmpp(V)
17.6V
Max. Power Current Impp(A)
4.83A
PV module numbers in parallel
10 50 A / 4.83
Total PV module numbers
1 x 10 = 10
Open Circuit Voltage Voc(V)
21.6V
Short Circuit Current Isc(A)
5.03A
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 10
Total PV module numbers: 1 x 10 = 10
Take S2400 inverter as an example to select proper PV module. After considering Voc of PV module not exceed
60Vdc and max. Vmpp of PV module close to 30Vdc or within 30Vdc ~ 32Vdc, we can choose PV module with
below specification.
Maximum Power (Pmax)
260W
Max. PV module numbers in series
1 30.9 x 1 ≒30 ~ 32
Max. Power Voltage Vmpp(V)
30.9V
Max. Power Current Impp(A)
8.42A
PV module numbers in parallel
6 50 A / 8.42
Total PV module numbers
1 x 6 = 6
Open Circuit Voltage Voc(V)
37.7V
Short Circuit Current Isc(A)
8.89A
Maximum PV module numbers in Series: 1
PV module numbers in Parallel: 6
Total PV module numbers: 1 x 6 = 6

5
5. Operation
Power On/Off
Once the inverter has been properly installed, press the power switch to turn on the unit. The unit will work
automatically in line mode or inverter mode according to input utility power's status. When press the power
switch again, the unit will be turned off.
LED Indicators & Audible Alarms
There are three indicators (Green/Red/Yellow) in the front panel of the unit.
LED Indicator
Messages
Green
Solid On
Output is available in bypass mode
Flashing
Output is powered by battery in inverter mode
Green
Solid On
Battery is charging by SCC
Flashing
Battery is not charging by SCC while SCC power on
Red
Solid On
Fault mode
Flashing
battery low or overload warning
Buzzer Audible Alarm
Messages
Inverter Mode
(Low-battery Voltage)
Buzzing every 1 seconds
110% overload warning
Buzzing every 0.5 second
Overcharge
Buzzing continuously
Fault mode
Buzzing continuously for 0.5 hour, unit shutdown (BAT-MODE)
Buzzing continuously(Line mode)
LCD Display
Display
Function
Input source information
Indicates the AC input
Indicates the PV input
Indicate input voltage, input frequency, battery voltage, PV voltage, charging current
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: Flashing with warning code
Fault: Lighting with fault code
Output Information
Indicate the output voltage, output frequency, load percent, load in VA, load in Watt
Battery Information
Indicates the Battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode,
charging status in line mode.
In AC mode, it will present battery charging status.
Status
Battery voltage
LCD Display
Constant
Current mode /
Constant
Voltage mode
< 11Vdc/pcs
4 bars will flash in turns.
11Vdc ~ 11.5Vdc/pcs
Bottom bar will be on and the other three
bars will flash in turns.
11.5Vdc ~ 12.5Vdc/pcs
Bottom two bars will be on and the other
two bars will flash in turns.
> 12.5Vdc/pcs
Bottom three bars will be on and the top
bar will flash.
Floating mode. Batteries are fully charged.
4 bars will be on.

6
In battery mode, it will present battery capacity.
Battery Voltage
LCD Display
< 11Vdc/pcs
11.0Vdc ~ 11.5Vdc/pcs
11.5Vdc ~ 12.5Vdc/pcs
> 12.5Vdc/pcs
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-50%, 50-74%, and 75-100%.
0%~25%
25%~50%
50%~75%
75%~100%
Mode operation information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel
Indicates load is supplied by utility power.
Indicates the utility charger circuit is working.
Indicates the DC/AC inverter circuit is working.
Mute operation
Indicates unit buzzer is disabled.
LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP”or “DOWN”
button to select setting programs. And then, press “ENTER”button to confirm the selection or ESC button to
exit.
Setting Programs:
Program
Description
Selectable option
00
Exit setting mode
Escape
01
Output source priority:
To configure load power
source priority
Solar first
Solar energy provides power to the
loads as first priority.
If solar energy is not sufficient to power
all connected loads, battery energy will
supply power the loads at the same
time.
Utility provides power to the loads only
when any one condition happens:
- Solar energy is not available
- Battery voltage drops to low-level
warning voltage or the setting point in
program 12.
Utility first (default)
Utility will provide power to the loads as
first priority.
Solar and battery energy will provide
power to the loads only when utility
power is not available.

7
SBU priority
Solar energy provides power to the
loads as first priority.
If solar energy is not sufficient to power
all connected loads, battery energy will
supply power to the loads at the same
time.
Utility provides power to the loads only
when battery voltage drops to either
low-level warning voltage or the setting
point in program 12.
02
Maximum charging current:
To configure total charging
current for solar and utility
chargers.
(Max. charging current =
utility charging current +
solar charging current)
10A
20A
30A
40A
50A (default)
03
AC input voltage range
Wide (default)
If selected, acceptable AC input voltage
range will be within 90-280VAC.
Narrow
If selected, acceptable AC input voltage
range will be within 170-280VAC.
06
Auto restart when overload
occurs
Restart disable
(default)
Restart enable
09
Output frequency
50Hz (default)
60Hz
11
Maximum utility charging
current
Note: If setting value in
program 02 is smaller than
that in program in 11, the
inverter will apply charging
current from program 02 for
utility charger.
10A
20A (default)
12
Setting voltage point back
to utility source when
selecting “SBU priority”or
“Solar first”in program 01.
Available options in S1200 model:
11.0V
11.3V
11.5V (default)
11.8V
12.0V
12.3V
12.5V
12.8V
Available options in S2400 model:
22.0V
22.5V
23.0V (default)
23.5V
24.0V
24.5V

8
25.0V
25.5V
13
Setting voltage point back
to battery mode when
selecting “SBU priority”or
“Solar first”in program 01.
Available options in S1200 model:
Battery fully
charged
12.0V
12.3V
12.5V
12.8V
13.0V
13.3V
13.5V (default)
13.8V
14.0V
Available options in S2400 model:
Battery fully
charged
24V
24.5V
25V
25.5V
26V
26.5V
27V (default)
27.5V
28V
16
Charger source priority:
To configure charger
source priority
If this inverter/charger is working in Line, Standby or Fault
mode, charger source can be programmed as below:
Solar first
Solar energy will charge battery as first
priority.
Utility will charge battery only when
solar energy is not available.
Utility first
Utility will charge battery as first priority.
Solar energy will charge battery only
when utility power is not available.
Only Solar
Solar energy will be the only charger
source no matter utility is available or
not.
If this inverter/charger is working in Battery mode, only solar
energy can charge battery. Solar energy will charge battery if
it's available and sufficient.
18
Alarm control
Alarm on (default)
Alarm off
19
Auto return to default
display screen
Return to default
display screen
(default)
If selected, no matter how users switch
display screen, it will automatically
return to default display screen (Input
voltage /output voltage) after no button
is pressed for 1 minute.

9
Stay at latest screen
If selected, the display screen will stay
at latest screen user finally switches.
20
Backlight control
Backlight on
(default)
Backlight off
22
Beeps while primary source
is interrupted
Alarm on (default)
Alarm off
Display Setting
The LCD display information will be switched in turns by pressing “UP”or “DOWN”key. The selectable
information is switched as below order: input voltage, input frequency, PV voltage, charging current, battery
voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, load in Watt, DC
discharging current, main CPU Version and second CPU Version.
Selectable
information
LCD display
Selectable
information
LCD display
Input voltage/Output
voltage
(Default Display
Screen)
Input Voltage=230V,
output voltage=230V
Load
percentage
Load percent=70%
Input frequency
Input frequency=50Hz
Load in VA
When connected load is lower
than 1kVA, load in VA will present
xxxVA like below chart.
When load is larger than 1kVA
(≧1KVA), load in VA will present
x.xkVA like below chart.

10
PV voltage
PV voltage=30V
Load in Watt
When load is lower than 1kW,
load in W will present xxxW like
below chart.
When load is larger than 1kW
(≧1KW), load in W will present
x.xkW like below chart.
Charging current
(if PV normal)
Charging current=50A
Main CPU
version
checking
Main CPU version 00001.01
Battery voltage
Battery voltage=25.5V
Secondary CPU
version
checking
Secondary CPU version 00003.03
Output frequency
Output frequency=50Hz
Operating Mode Description
Operation mode
Description
LCD display
Standby mode
Note:
*Standby mode: The inverter is
not turned on yet but at this
time, the inverter can charge
battery without AC output.
Utility input bypass to
output, charger
available, LCD backlight
is off
Charging by utility.
Charging by PV energy.
Line Mode
The unit will provide
output power from the
mains. It will also
charge the battery at
line mode.
Charging by PV energy.
Charging by utility.

11
Battery Mode
The unit will provide
output power from
battery and PV power.
Power from battery and PV energy.
Power from battery only.
Fault Reference Code
Fault Code
Fault Event
Icon on
Fault Code
Fault Event
Icon on
00
Output short circuit
05
Fan locked
01
Over load time out
06
Over
temperature
02
Battery weak
07
Output voltage
too low
03
Output voltage too
high
08
Over charge
04
Main relay stick
Warning Indicator
Warning Code
Warning Event
Icon flashing
01
Over load
02
Battery low

12
6. Trouble Shooting
Use the table below to solve minor problems.
Problem
LCD/LED/Buzzer
Explanation / Possible cause
What to do
When power fails,
the backup time is
shorten.
Battery low alarm
issue quickly.
Battery voltage is too low.
Charge the unit at least 8
hours.
Battery capacity is not full even
after charge the unit for at least 8
hours.
Check the date code of the
battery. If the batteries are
too old, replace the batteries.
Mains exist but the
unit works in
battery mode.
Input voltage is
displayed as 0 on the
LCD and green LED is
flashing.
Input protector is tripped
Check if AC breaker is tripped
and AC wiring is connected
well.
Green LED is flashing.
Insufficient quality of AC power.
(Shore or Generator)
1. Check if AC wires are too
thin and/or too long.
2. Check if generator (if
applied) is working well or if
input voltage range setting is
correct. (UPSAppliance)
Green LED is flashing.
Set “Solar First”as the priority of
output source.
Change output source priority
to Utility first.
No LED display on
the front panel
when the utility
power is normal.
No LED display.
Battery is not connected well.
Check the external battery
cable and terminal. Make sure
all the battery connections to
the unit are all correct.
Battery defect.
Replace the batteries.
Buzzer beeps
continuously and
red LED is on.
Fault code 00
Output short circuited.
Check if wiring is connected
well and remove abnormal
load.
Fault code 01
Overload error. The inverter is
overload 110% and time is up.
Reduce the connected load by
switching off some
equipment.
Fault code 02
Battery weak
1. Re-charge battery.
2. Replace battery.
Fault code 03
Output voltage too high
Return to repair center.
Fault code 04
Main relay stick
Return to repair center.
Fault code 05
Fan fault
Replace the fan.
Fault code 06
Internal temperature of inverter
component is over 100°C.
Check whether the air flow of
the unit is blocked or whether
the ambient temperature is
too high.
Fault code 07
Output voltage too low
Return to repair center.
Fault code 08
Battery is over-charged.
Return to repair center.
The battery voltage is too high.
Check if spec and quantity of
batteries are meet
requirements.
If there is any abnormal situations occur, which doesn't list above, please call the service people immediately
for professional examine.

13
7. Specifications
MODEL
S1200 XP Solar
S2400 XP Solar
CAPACITY
720 W
1440 W
INPUT
Voltage
230 VAC
Voltage Range
170-280 VAC (UPS mode)
90-280 VAC (INV. Mode)
OUTPUT
Voltage Regulation (Batt. Mode)
+/-10%
Transfer Time
20 ms typical
Waveform
Simulated Sine Wave
BATTERY
Battery Voltage
12 VDC
24 VDC
Floating Charge Voltage
13.7 VDC ± 0.25 VDC
27.4 VDC ± 0.5 VDC
Maximum Charge Current
10A or 20A
SOLAR CHARGER
Charging Current
50 A
System Voltage
12 VDC
24 VDC
Operating Voltage Range
15~18 VDC
30~32 VDC
Max. PV Array Open Circuit Voltage
40 VDC
60 VDC
PHYSICAL
Dimension (DxWxH) mm
325 X 230 X 86
Net Weight (kgs)
2.5
2.8