opti-solar 1KVA User manual

1KVA/ 2KVA/ 3KVA
INVERTER / CHARGER
User Manual
www.opti-solar.com

CONTENTS
ABOUT THIS MANUAL .....................................................................................................................................1
Purpose............................................................................................................................................................1
Scope...............................................................................................................................................................1
SAFETY INSTRUCTIONS..................................................................................................................................1
INTRODUCTION ...............................................................................................................................................2
Features...........................................................................................................................................................2
Basic System Architecture...............................................................................................................................3
Product Overview.............................................................................................................................................4
INSTALLATION ...............................................................................................................................................10
Unpacking and Inspection..............................................................................................................................10
Preparation ....................................................................................................................................................10
Mounting the Unit...........................................................................................................................................11
Battery Connection ........................................................................................................................................12
AC Input/Output Connection..........................................................................................................................13
PV Connection (Only apply for the model with solar charger).......................................................................15
Final Assembly...............................................................................................................................................16
OPERATION .....................................................................................................................................................17
Power ON/OFF ..............................................................................................................................................17
Operation and Display Panel.........................................................................................................................17
LCD Display Icons .........................................................................................................................................18
LCD Setting....................................................................................................................................................20
Display Setting...............................................................................................................................................21
Operating Mode Description..........................................................................................................................23
Fault Reference Code....................................................................................................................................24
Warning Indicator...........................................................................................................................................24
SPECIFICATIONS ...........................................................................................................................................25
Table 1 Line Mode Specifications ...................................................................................................................25
Table 2 Invert Mode Specifications ................................................................................................................26
Table 3 Charge Mode Specifications ..............................................................................................................27
Table 4 General Specifications .......................................................................................................................27
Charging Controls...........................................................................................................................................27
TROUBLE SHOOTING.....................................................................................................................................28
Appendix: Approximate Back-up Time Table ...........................................................................................29

1
ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read
this manual carefully before installations and operations. Keep this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and
keep this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all
appropriate sections of this manual.
2. CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning.
Turning off the unit will not reduce this risk.
5. CAUTION –Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required spec to select appropriate cable
size. It’s very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop
a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please
refer to INSTALLATION section of this manual for the details.
10. Fuses (40A, 32VDC *4pcs for 1KVA/2KVA and *6pcs for 3KVA) are provided as over-current protection
for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent grounded
wiring system. Be sure to comply with local requirements and regulation to install this inverter.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input
short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after
following troubleshooting table, please send this inverter/charger back to local dealer or service center
for maintenance.

2
INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to
offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable
and easy-accessible button operation such as battery charging current, AC/solar charger priority, and
acceptable input voltage based on different applications.
Features
Pure sine wave inverter
Configurable input voltage range for home appliances and personal computers via LCD setting
Configurable battery charging current based on applications via LCD setting
Configurable AC/Solar Charger priority via LCD setting
Compatible to mains voltage or generator power
Auto restart while AC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger design for optimized battery performance
Cold start function

3
Basic System Architecture
The following illustration shows basic application for this inverter/charger. It also includes following devices to
have a complete running system:
Generator or Utility.
PV modules (option)
Consult with your system integrator for other possible system architectures depending on your requirements.
This inverter can power all kinds of appliances in home or office environment, including motor-type appliances
such as tube light, fan, refrigerator and air conditioner.
Figure 1 Hybrid Power System
Note: Appliances like air conditioner need at least 2~3 minutes to restart because it’s required to have
enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers
in a short time, it will cause damage to your connected appliances. To prevent this kind of damage,
please check manufacturer of air conditioner if it’s equipped with time-delay function before
installation. Otherwise, this inverter/charger will trig overload fault and cut off output to protect your
appliance but sometimes it still causes internal damage to the air conditioner.

4
Product Overview
2KVA/3KVA Model 1KVA Model
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. Communication port

5
Operation Diagrams and work conditions
Abbreviation:
IUC, charging current from AC charger
ISC, charger current from solar charger
ICHG, total charging current of battery
IDISC, discharging current from battery
ILOAD, output current of AC load
1) When utility source is not present, IUC=0, battery charged from solar source, ICHG=ISC, load powered from
solar and battery power, the Max. ISC goes up to 50Amp if solar panel with enough energy.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ILOAD
ISC
IUC
ICHG
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar
solar
utility
utility
solar
utility
solar and utility
utility
solar and utility
solar

6
2) When solar source is not present, ISC=0, battery charged from utility source, ICHG=IUC, load powered from
utility, the Max. IUC limited at 20Amp for 1KVA, and 30Amp for 2KVA/3KVA.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ISC
IUC
ICHG ILOAD
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar
solar
utility
utility
solar
utility
solar and utility
utility
solar and utility
solar
3) When utility and solar are presented, battery charged from solar source, ICHG=ISC, load powered from solar
and battery, the Max. ISC goes up to 50Amp if solar panel with enough energy. Output source and charger
source will be turned to utility side in case solar panel without enough energy and battery voltage down to
pre-alarm level.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ILOAD
ISC
IUC
ICHG
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar
solar

7
4) When utility and solar are not present, IUC=ISC=0, connected load will be powered from battery.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ILOAD
ISC
IUC
ICHG
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar
solar
utility
utility
solar
utility
solar and utility
solar
solar and utility
utility
5) When utility and solar are presented, battery charged from utility, ICHG=IUC, load powered from utility, the
Max. IUC limited at 20Amp for 1KVA, 30Amp 2KVA and 3KVA.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ISC
IUC
ICHG ILOAD
Priority Setting Combinations:
Charger Priority
Output Source Priority
utility
utility

8
6) When utility and solar are presented, battery charged from solar, ICHG=ISC, load powered from utility, Max. ISC
goes up to 50Amp if solar panel with enough energy. Charger source will be turned to utility side in case solar
panel without enough energy.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ISC
IUC
ICHG ILOAD
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar
utility
7) When utility and solar are presented, battery charged from both solar and utility, ICHG=ISC+IUC, load powered
from solar and battery. Output source will be turned to utility side in case battery voltage down to pre-alarm
level.
Ex. 3KVA Model, AC Load = 2000W
i.e. ILOAD ≈ 8.7Amp and IDISC ≈ 92Amp
Max. ICHG = 50Amp, it means battery always stay in discharge situation since the required power of AC load is
larger than charging. Once battery down to pre-alarm level, AC load will be powered from utility then IDISC
become zero.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ILOAD
ISC
IUC
ICHG
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar and utility
solar

9
8) When utility and solar are presented, battery charged from both solar and utility, ICHG=ISC+IUC, load powered
from utility.
Ex. 3KVA Model, AC Load = 2000W
i.e. ILOAD ≈ 8.7Amp, IDISC = 0
Battery always charged by the max. power from both utility and solar source.
Utility Charger
Solar Charger
Utility Source
Solar Source
Battery Bank
DC/AC Inverter
AC Load
IDISC
ISC
IUC
ICHG ILOAD
Priority Setting Combinations:
Charger Priority
Output Source Priority
solar and utility
utility

10
INSTALLATION
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should
have received the following items inside of package:
The unit x 1
User’s manual x 1
Communication cable x 1
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws as shown below.

11
Mounting the Unit
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction materials.
Mount on a solid surface
Install this inverter at eye level in order to allow the LCD display to be read at all times.
For proper air circulation to dissipate heat, allow a clearance of approx. 10 cm to the side and approx. 50
cm above and below the unit.
The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
The recommended installation position is to be adhered to the wall vertically.
Be sure keep other objects and surfaces as shown in the below diagram to guarantee sufficient heat
dissipation and to have enough space for removing wires.
Install the unit by screwing three screws.

12
Battery Connection
CAUTION: To safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect device between battery and inverter. It may not be requested to have a disconnect
device in some applications, however, it’s still requested to have over-current protection installed. Please refer
to typical amperage in below table as required fuse or beaker size.
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 battery
connection. To reduce risk of injury, please use the proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model
Typical
Amperage
Battery
capacity
1~3 m one-way
Ring Type for Cable
Terminal
Torque value
1KVA/2KVA
66A
100AH
1*6AWG
KST: RNBS14-6
2~ 3 Nm
2*10AWG
KST: RNBS8-6
3KVA
100A
100AH
200AH
1*4AWG
KST: RNBS22-6
2~ 3 Nm
2*8AWG
KST: RNBS14-6
Please follow below steps to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. 1KVA model supports 12VDC system and 2KVA/3KVA model supports 24VDC system. Connect all battery
packs as below chart. It’s suggested to connect at least 100Ah capacity battery for each.
NOTE: Please only use sealed lead acid battery or sealed GEL/AGM lead-acid battery.
3. Insert the ring terminal of battery cable flatly into battery connector on the inverter and make sure the
bolts are tightened to a torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is
correctly connected and ring terminals are tightly screwed to the battery terminals.

13
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!! Do not place anything between the flat part of the inverter terminal and the ring
terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are
connected tightly.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure
positive (+) must be connected to positive (+) and negative (-) must be connected to negative
(-).
AC Input/Output Connection
CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between
inverter and AC input power source. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 10A
for 1KVA, 20A for 2KVA, 32A for 3KVA.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input
and output connectors.
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 AC input
connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Model
AWG no.
Torque
1KVA
16 AWG
0.5~ 0.6 Nm
2KVA
14 AWG
0.8~ 1.0 Nm
3KVA
12 AWG
1.2~ 1.6 Nm
Please follow below steps to implement AC input/output connection:
1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 6mm for six conductors of 1KVA and 10mm for 2K/3KVA. And shorten phase L
and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be
sure to connect PE protective conductor ( ) first.
L→LINE (brown or black)
→Ground (yellow-green)
N→Neutral (blue)
1KVA

14
2KVA/3KVA
WARNING:
Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.
Be sure to connect PE protective conductor ( ) first.
L→LINE (brown or black)
→Ground (yellow-green)
N→Neutral (blue)
1KVA
2KVA/3KVA
5. Make sure the wires are securely connected.

15
PV Connection (Only apply for the model with solar charger)
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.
Model
Typical Amperage
Cable Size
Torque
1KVA/2KVA/3KVA
50A
8 AWG
1.4~1.6 Nm
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Check correct polarity of connection cable from PV modules and PV input
connectors. Then, connect positive pole (+) of connection cable to positive
pole (+) of PV input connector. Connect negative pole (-) of connection
cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.

16
Final Assembly
After connecting all wirings, please put bottom cover by screwing two screws as shown below.
Communication Connection
This inverter/charger is equipped with a communication port to communicate with a PC with corresponding
software. Please use supplied communication cable to connect to communication port of this inverter and
RS-232 port of the PC. For the detailed software operation, please check user manual of bundled software.

17
OPERATION
Power ON/OFF
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch
(located on the button of the case) to turn on the unit.
Operation and Display Panel
The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes
three indicators, four function keys and a LCD display, indicating the operating status and input/output
power information.
LED Indicator
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 fully charged
Flashing
Battery is charging.
Red
Solid On
Fault mode
Flashing
Warning mode
Function Keys
Function Key
Description
ESC
Exit setting mode
UP
To previous selection
DOWN
To next selection
ENTER
To confirm the selection in setting mode or enter setting mode
LCD display
LED indicators
Function keys

18
LCD Display Icons
Icon
Function description
Input Source Information
Indicates the AC input.
Indicates the PV input
Indicate input voltage, input frequency, PV voltage, battery voltage and
charger 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 output voltage, output frequency, load percent, load in VA and load in
Watt.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery
mode and 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
<2V/cell
4 bars will flash in turns.
2 ~ 2.083V/cell
Bottom bar will be on and the other three
bars will flash in turns.
2.083 ~ 2.167V/cell
Bottom two bars will be on and the other
two bars will flash in turns.
> 2.167 V/cell
Bottom three bars will be on and the top
bar will flash.
Floating mode. Batteries are fully charged.
4 bars will be on.