Download Hybrid PV Inverter User Manual

User Manual
Hybrid PV Inverter
Table Of Contents
1.
2.
3.
Introduction ............................................................................................1
Important Safety Warning .....................................................................2
Unpacking & Overview ...........................................................................4
3-1. Pack ing List ........................................................................................ 4
3-2. Product Ov erv iew................................................................................ 4
4. Installation ..............................................................................................5
4-1. Selecting Mounting Location ................................................................ 5
4-2. Mounting Unit..................................................................................... 5
5. Grid (Utility) Connection ...........................................................................7
5-1. Preparation......................................................................................... 7
5-2. Connecting to the AC Utility ................................................................. 7
6. PV Module (DC) Connection ...................................................................8
7. Battery Connection .................................................................................9
8. Load (A C Output) Connection ............................................................. 10
9. Communication .................................................................................... 11
10. Commissioning..................................................................................... 12
11. Operation.............................................................................................. 13
11-1. Interface ........................................................................................ 13
11-2. LCD Information Define................................................................... 13
11-3. Button Definition............................................................................. 15
11-4 Query Menu Operation ..................................................................... 15
12. Charging Manageme nt ........................................................................ 25
13. Maintenance & Cleaning ...................................................................... 27
14. Trouble Shooting .................................................................................. 28
14-1. Warning List ................................................................................... 28
14-2. Fault Reference Codes..................................................................... 29
15. Specifications........................................................................................ 33
1. Introduction
This hy brid PV inverter can provide power to connected loads by utilizing PV pow er, utility
power and battery power. When PV energy output is good, it w ill pow er connected loads from
solar electric (photov oltaic or PV ) pow er, feed power back to grid (utility ), and charge battery.
When PV energy output is not suff icient for connected loads, this inverter w ill conv ert the
utility at the same time.
Hy brid inverter
Distribution Box
PV module
E lectric grids
Load
Battery
Figur e 1
Basic hybr id PV System Overview
Depending on different pow er situations, this hybrid inv erter is designed to generate
continuous pow er from PV solar modules (solar panels), battery, and the utility. When MPP
input v oltage of PV modules is within acceptable range (see specif ication for the details), this
inv erter is able to generate power to feed the grid (utility ) and charge battery. This inv erter is
only compatible w ith PV module types of single cry stalline and poly cry stalline. Do not connect
any PV array types other than these two types of PV modules to the inverter. See Figure 1 for
a simple diagram of a typical solar system w ith this hybrid inverter.
Note: When PV input v oltage is lower than 250V for 3KW and 150V for 2KW, the power of
inv erter w ill de-rate.
1
2. Important Safety Warning
Before using the inver ter , please read all instr uctions and cautionary markings on
the unit and this manual. Store the manual where it can be accessed easily.
This manual is for qualif ied personnel. The tasks described in this manual may be performed
by qualif ied personnel only.
General PrecautionC onventions used:
WA RNING! Warnings identify conditions or practices that could result in personal injury ;
CAUTIO N! Caution identify conditions or practices that could result in damaged to the
unit or other equipment connected.
WA RNING! Before installing and using this inverter, read all instructions and cautionary
markings on the inverter and all appropriate sections of this guide.
WA RNING! N ormally grounded conductors may be ungrounded and energized when a
ground fault is indicated.
WA RNING! This inverter is heavy. It should be lifted by at least tw o persons.
CAUTIO N! A uthorized serv ice personnel should reduce the risk of electrical shock by
disconnecting AC, DC and battery pow er from the inverter before attempting any maintenance
or cleaning or w orking on any circuits connected to the inverter. Turning off controls w ill not
reduce this risk. Internal capacitors can remain charged for 5 minutes after disconnecting all
sources of pow er.
CAUTIO N! Do not disassemble this inverter yourself. It contains no user-serv iceable parts.
Attempt to serv ice this inverter y ourself may cause a risk of electrical shock or f ire and w ill
void the warranty from the manufacturer.
CAUTIO N! To avoid a risk of f ire and electric shock, make sure that existing w iring is in good
condition and that the wire is not undersized. Do not operate the Inverter w ith damaged or
substandard w iring.
CAUTIO N! U nder high temperature env ironment, the cover of this inverter could be hot
enough to cause skin burns if accidentally touched. E nsure that this inv erter is aw ay from
normal traff ic areas.
2
CAUTIO N! U se only recommended accessories from installer . Otherw ise, not-qualif ied tools
may cause a risk of f ire, electric shock, or injury to persons.
CAUTIO N! To reduce risk of f ire hazard, do not cover or obstruct the cooling fan.
CAUTIO N! Do not operate the Inverter if it has received a sharp blow, been dropped, or
otherw ise damaged in any way. If the Inverter is damaged, called for an RMA (Return M aterial
Authorization).
Symbols used in Equipment M arkings
Refer to the operating instructions
Caution, risk of danger
Caution, risk of electric shock
Caution, risk of electric shock, E nergy storage timed discharge
Caution, hot surface
3
3. Unpacking & Overview
3 -1. Packing List
Before installation, please inspect the unit. Be sure that nothing inside the package is
damaged. You should have received the follow ing items inside of package:
Inverter unit
S oftware CD
M anual
USB cable
3 -2. Product Overview
1)
2)
3)
4)
5)
6)
7)
8)
9)
PV connectors
G rid connectors
Battery connectors
AC output connectors (Load connection)
RS -232 communication port
USB communication port
Intelligent slot
LCD display panel (P lease check section 10 for detailed LCD operation)
Operation buttons
4
4. Installation
4 -1. Selecting M ounting Location
Consider the follow ing points before selecting w here to install:

Do not mount the inv erter on flammable construction materials.

M ount on a solid surface

This inverter can make noises during operation which may be perceived as a nuisance in
a liv ing area.

Install this inverter at eye lev el 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. 20 cm to the
side and approx. 50 cm abov e and below the unit.

Dusty conditions on the unit may impair the performance of this inv erter.

The ambient temperature should be between 0°C and 40°C and relative humidity should
be betw een 5% and 85% to ensure optimal operation.

The recommended installation position is to be adhered to (v ertical).

For proper operation of this inverter, please use appropriate cables for grid connection.

The pollution degree of the inverter is PD2. Select an appropriate mounting location.
Install the solar inverter in a protected area that is dry, free of excessiv e dust and has
adequate air flow. Do NOT operate it w here the temperature and humidity is beyond the
specif ic limits. (P lease check the specs for the limitations.)

Installation position shall not prevent access to the disconnection means.

This inverter is designed with IP 20 for indoor applications only.
4 -2. Mounting Unit
WA RNING!! Remember that this inverter is heavy ! P lease be carefully w hen lifting out
from the package.
Installation to the wall should be implemented w ith the proper screw s. M ount the wall bracket
so that the solar inverter can be easily attached to the w all. A fter that, the dev ice should be
bolted on securely.
The inverter only can be used in a C LOSED E LECTRICAL OPERATING AREA.
WA RNING!! FIRE HAZARD.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON -COMBUSTIBLE SURFACE
ON LY.
5
1. Drill four holes in the marked locations
w ith four screw s.
2.
3. Check if the solar inverter is f irmly
secured.
P lace the unit on the surface and align the
mounting holes w ith the four screw s.
Note: Recommended specs for screws.
6
5. Grid (Utility) Connection
5 -1. Preparation
Before connecting to AC utility, please install a separ ate AC circuit breaker betw een inverter
and AC utility. This will ensure the inv erter can be securely disconnected during maintenance
and fully protected from ov er current of AC input.
NOTE1 : A lthough this inv erter is equipped w ith a fuse (F 6 point on PCB, 250VAC /30A for 3KW;
F 6 and F 7 points on PCB, 250VAC /30A for 2KW), it’s still necessary to install a separate circuit
breaker for safety consideration. P lease use 250VAC/30A circuit breaker.
NOTE2 : The overv oltage category of the AC input is III. It should be connected to the power
distribution.
WA RNING! It's very important for sy stem safety and eff icient operation to use appropriate
cable for grid (utility ) connection. To reduce risk of injury, please use the proper
recommended cable size as below.
S uggested cable requirement for AC w ire
M odel
2KW
3KW
N ominal G rid Voltage
101/110/120/127 VAC
208/220/230/240 VAC
Conductor cross-section (mm 2)
≥4.17
≥3.35
AWG no.
10 - 11
10 - 12
5 -2. Connecting to the AC Utility
S tep 1: C heck the grid voltage and frequency w ith an AC voltmeter. It should be the same to
“VAC” value on the product label.
S tep 2: Turn off the circuit breaker.
S tep 3: Remove insulation sleeve 8 mm for three conductors. And
shorten phase L and neutral conductor N 3 mm. Refer to chart 1.
Chart 1
S tep 4: C onnect w ires according to polarities indicated on
terminal block. Be sure to connect P E protective conductor
( ) f irst.
L→LINE ( brown or black)
→ Ground (yellow-green)
N→ Neutral ( blue)
S tep 5: M ake sure the w ires are securely connected. The
reference tightening torque is 0.82 N /m.
Chart
CAUTIO N: To prevent risk of electric shock, ensure the ground w ire is properly earthed
before operating this hy brid inverter no matter the grid is connected or not.
7
6. PV Module (DC) Connection
CAUTIO N: Before connecting to PV modules, please install separ ately a DC circuit breaker
betw een inverter and PV modules.
NOTE1 : P lease use 600VDC/25A circuit breaker for 3KW; 500VDC /25A for 2KW.
NOTE2 : The overv oltage category of the PV input is II.
P lease follow below steps to implement PV module connection:
WA RNING: Because this inv erter is non-isolated, only tw o ty pes of PV modules are
acceptable: single cry stalline and poly cry stalline w ith only C lass A -rated. To avoid any
malfunction, do not connect any PV modules w ith possibility of leakage current to the
inv erter. F or example, non-grounded PV modules w ill cause leakage current to the inverter.
S tep 1: Check the input voltage of PV array modules. The acceptable input v oltage of the solar
inv erter is 250VDC - 450VDC for 3KW and 150VDC-320VDC for 2KW. This sy stem is only
applied w ith one string of PV array. P lease make sure that the maximum current load of PV
input connector is 13A for 3KW and 15A for 2KW..
CAUTIO N: E xceeding the maximum input v oltage can destroy the unit!! C heck the sy stem
before w ire connection.
S tep 2: Disconnect the circuit breaker.
S tep 3: Remove insulation sleeve 10 mm for positive and
negativ e conductors. Refer to chart 3.
S tep 4: C heck correct polarity of connection cable from
PV modules and PV input connectors. Then, connect
positiv e pole (+) of connection cable to positive pole (+)
Chart 3
of PV input connector. Connect negative pole (-) of
connection cable to negativ e pole (-) of PV input
connector. Refer to Chart 4.
S tep 5: M ake sure the w ires are securely connected.
The reference tightening torque is 1.22 N /m.
8
Chart 4
WA RNING! It's very important for sy stem safety and eff icient operation to use appropriate
cable for PV module connection. To reduce risk of injury, please use the proper recommended
cable size as below.
Conductor cross-section (mm 2)
≥3.35
AWG no.
6 - 12
CAUTIO N: Never directly touch terminals of the inverter. It will cause lethal electric shock.
CAUTIO N: Do NOT touch the inverter to avoid electric shock. When PV modules are
exposed to sunlight, it may generate DC voltage to the inverter.
7. Battery Connection
CAUTIO N: Before connecting to batteries, please install separ ately a DC circuit breaker
betw een inverter and batteries.
NOTE: P lease only use sealed lead acid battery, vented and G el battery. P lease check
maximum charging voltage and current w hen f irst using this inverter. If using Lithium iron or
N icd battery , please consult with installer for the details.
NOTE: P lease use P lease use 60VDC/100A circuit breaker for 3KW and 60VDC/80A circuit
breaker for 2KW.
P lease follow below steps to implement battery connection:
S tep 1: C heck the nominal voltage of batteries. The nominal input v oltage for hy brid inv erter is
48VDC.
S tep 2: U se tw o battery cables. Remove insulation sleeve 12
mm and insert conductor into cable ring terminal. Refer to
chart 5.
S tep 3: F ollow ing battery polarity guide printed near the
battery terminal! P lace the external battery cable ring terminal
ov er the battery terminal. Refer to Chart 6.
RED cable to the positive terminal ( +) ;
BLACK cable to the negative ter minal ( -) .
Chart 5
S tep 4: M ake sure the w ires are securely connected. The
reference tightening torque is 2.04 N /m.
Chart 6
9
WA RNING! It's very important for sy stem safety and eff icient operation to use appropriate
cable for battery connection. To reduce risk of injury, please use the proper recommended
cable size as below.
M odel
2KW
3KW
N ominal G rid Voltage
101/110/120/127 VAC
208/220/230/240 VAC
Conductor cross-section (mm 2)
≥8.37
≥13.3
AWG no.
≤8
≤6
8. Load (AC Output) Connection
CAUTIO N: To prevent further supply to the load via the inverter during any mode of
operation, an additional disconnection dev ice should be placed on in the building w iring
installation.
WA RNING! It's very important for sy stem safety and eff icient operation to use appropriate
cable for AC connection. To reduce risk of injury, please use the proper recommended cable
size as below.
M odel
2KW
3KW
N ominal G rid Voltage
101/110/120/127 VAC
208/220/230/240 VAC
Conductor cross-section (mm 2)
≥4.17
≥3.35
AWG no.
10 - 11
10 - 12
S tep 1: Remove insulation sleeve 8 mm for three
conductors. A nd shorten phase L and neutral conductor N 3
mm. Refer to chart 7.
S tep 2: C onnect w ires according to polarities indicated on
terminal block. Be sure to connect P E protective conductor
(
) f irst. Refer to Chart 8.
Chart 7
L→LINE ( brown or black)
→ Ground (yellow-green)
N→ Neutral ( blue)
S tep 3: M ake sure the w ires are securely connected.
The reference tightening torque is 0.82 N /m.
Chart 8
CAUTIO N: It’s only allowed to connect load to “AC Output Connector”. Do NOT connect
the utility to “AC Output Connector”.
CAUTION: Be sure to connect L terminal of load to L terminal of “AC Output Connector” and
N terminal of load to N terminal of “AC O utput C onnector”. The G terminal of “AC Output
Connector” is connected to grounding of the load. Do NOT mis-connect.
CAUTIO N: This inverter is not allow ed to operate in parallel. P lease do NOT parallel
connect more than one unit in AC output connector. Otherw ise, it w ill damage this inverter.
10
9. Communication
The inverter is equipped w ith RS 232 and US B ports and it is also equipped w ith a slot for
alternativ e communication interfaces in order to communicate w ith a PC w ith corresponding
softw are. This intelligent slot is suitable to install w ith SNMP card and Modbus card. Follow
below procedure to connect communication w iring and install the software.
For RS 232 port, y ou should use a DB9 cable as follow s:
For US B port, you should use a USB cable as follow s:
For SNMP or MODBUS card, you should use RJ45 cables as follow s:
P lease access softw are dow nload site to download the monitoring software in your PC.
Detailed information is listed in the next chapter. After software is installed, you may initial the
monitoring softw are and extract data through communication port.
11
10. Commissioning
S tep 1: C heck the follow ing requirements before commissioning:

E nsure the inv erter is f irmly secured

Check if the open circuit DC voltage of PV module meets requirement (Refer to Section
6)

Check if the open circuit utility v oltage of the utility is at approximately same to the
nominal expected value from local utility company.

Check if connection of AC cable to grid (utility ) is correct if the utility is required.

F ull connection to PV modules.

AC circuit breaker (only applied w hen the utility is required), batter circuit breaker, and
DC circuit breaker are installed correctly.
S tep 2: Sw itch on the battery circuit breaker and then sw itch on PV DC breaker. After that, if
there is utility connection, please sw itch on the AC circuit breaker. A t this moment, the inverter
is turned on already. H owev er, there is no output generation for loads. Then:

If LCD lights up to display the current inverter status, commissioning has been
successfully. A fter pressing “ON” button for 1 second w hen the utility is detected, this
inv erter w ill start to supply power to the loads. If no utility exists, simply press “ON”
button for 3 seconds. Then, this inverter w ill start to supply power to the loads.

If red LED lights up, or w arning/fault indicator appears in LCD, an error has occurred to
this inv erter. P lease inform your installer.
S tep 3: Install monitoring software in your PC. F ollow below steps to install softw are.
1. G o to the w ebsite http://www.power -software-download.com/solarpower .html
to dow nload softw are in your PC. Then, please execute setup.exe for initiating installation
softw are.
2. F ollow the on-screen instructions to install the software.
3. When your computer restarts, the monitoring softw are w ill appear as shortcut icon located
in the sy stem tray, near the clock.
12
11. Operation
11-1 . Interface
This display is operated by four buttons.
NOTICE: To accurately monitor and calculate the energy generation, please calibrate the
timer of this unit v ia software every one month. For the detailed calibration, please check the
user manual of bundled software.
11-2 . LCD Infor mation Define
Display
Function
Indicates AC input v oltage or frequency.
Vac: voltage, H z: frequency
Indicates AC output power, voltage, frequency, or load
percentage.
KW: power, Vac: Voltage, H z: frequency, % : Load
percentage
13
Indicates PV input voltage or pow er.
Volt: voltage, KW: pow er
Indicates battery voltage or percentage.
Volt: voltage, % : percentage
Indicates charging current to battery.
Indicates that the warning occurs.
Indicates that the fault occurs.
Indicates fault code or warning code.
Indicates date and time, or the date and time users set for
query ing energy generation.
Indicates solar panels.
Icon flashing indicates PV input v oltage or is out of range.
Indicates utility.
Icon flashing indicates utility voltage or frequency is out of
range.
Indicates battery condition. A nd the lattice of the icon
indicates battery capacity.
Icon
Icon
flashing indicates battery is not connected.
flashing indicates the battery voltage is too low.
Indicates AC output for loads is enabled and inverter is
prov iding pow er to the connected loads.
Indicates AC output for loads is enabled but there is no
power prov ided from inverter. A t this time, no battery and
the utility are available. Only PV pow er exists but is not able
to prov ide power to the connected loads.
Indicates overload.
Indicates PV energy generated.
14
11-3 . Button Definition
Button
Operation
F unction
E nter query menu.
S hort press.
If it’s in query menu, press this button to
conf irm selection or entry.
ENTE R/ON
P ress and hold the button for This inv erter is able to provide power to
approximately 1 second when connected loads v ia AC output connector.
the utility is detected or 3
seconds w ithout the utility.
S hort press.
Return to previous menu.
P ress and hold the button
ESC /OFF
until the buzzer continuously
Turn off power to the loads.
sounds.
Up
S hort press.
S elect last selection or increase value.
If it’s in query menu, press this button to
jump to next selection or decrease value.
Dow n
S hort press.
M ute alarm in standby mode or battery
mode.
NOTE: If backlight shuts off, you may activate it by pressing any button. When an error
occurs, the buzzer w ill continuously sound. You may press any button to mute it.
11-4 Query Menu O peration
The display shows current contents that hav e been set. The displayed contents can be
changed in query menu v ia button operation. P ress ‘E nter’ button to enter query menu. There
are seven query selections:

G rid(U tility ) voltage or frequency of AC input

F requency, voltage, power or load percentage of AC output

Input voltage or power of PV input.

Battery v oltage or capability percentage.

Date and time.

Today or total energy generated.

M ode of query energy generated.
15
Setting Display Procedure

Input voltage or frequency of AC input
Procedure

Frequency, voltage, power or percentage of AC output
Procedure
16
Input voltage or power of PV input.
Procedure

Battery voltage or per centage.
Procedure
1.
Enter
2.
Up
Down
3.
Enter
4.
17
5.
Enter
Up
Down

Date and time.
Procedure

Today or total ener gy generated.
Procedure
18

M ode of query energy gener ated.
Energy generation display of selected day
Procedure
LC D Display:
Energy generation display of selected month
Procedure
LC D Display:
19
Energy generation display of selected year
Procedure
LC D Display:
11-5 . Oper ation M ode & Display
Grid-tie with backup mode
This inverter is connected to grid and w orking w ith DC /INV operation.
LC D Display
Description
This inverter is activated to generate
power to the loads v ia AC output
connector. PV pow er is suff icient to
charge battery, prov ide pow er to
loads, and feed power back to utility.
20
This inverter is activated to generate
power to the loads v ia AC output
connector. PV pow er is charging the
battery. At the same time, PV pow er
and the utility are supply ing pow er to
the connected load.
This inverter is activated to generate
power to the loads v ia AC output
connector. PV pow er is generated, but
not suff icient enough to charge
battery by itself. PV power and the
utility are charging battery at the same
time. And the utility is also supply ing
power to the connected load.
This inverter is disabled to generate
power to the loads v ia AC output
connector. PV pow er is suff icient to
charge battery and feed power back to
grid.
This inverter is disabled to generate
power to the loads v ia AC output
connector. PV pow er and utility are
charging battery at the same time.
This inverter is disabled to generate
power to the loads v ia AC output
connector. PV pow er is feeding power
back to the utility. N o battery is
connected or battery is not available to
use at this moment.
21
This inverter is activated to generate
power to the loads v ia AC output
connector. PV pow er is suff icient to
charge battery, prov ide pow er to
loads, and feed power back to utility.
N o battery is connected or battery is
not available to use at this moment.
This inverter is activated to generate
power to the loads v ia AC output
connector. PV pow er and utility are
prov iding pow er to the connected
loads. N o battery is connected or
battery is not available to use at this
moment.
Inverter mode
This inverter is w orking w ith DC /INV operation and not connecting to the grid.
LC D Display
Description
This inverter is activated to generate
power to the loads v ia AC output
connector. A t the same time, the utility
is out of range. PV pow er is suff icient
to charge battery and prov ide power to
the connected loads.
This inverter is activated to generate
power to the loads v ia AC output
connector. A t the same time, the utility
is out of range. PV power is generated,
but not suff icient enough to power
loads by itself. PV pow er and battery
are prov iding power to the connected
loads at the same time.
22
This inverter is activated to generate
power to the loads v ia AC output
connector. A t the same time, the utility
is out of range. PV pow er is not
detected or available at this moment.
Only battery power is available to
prov ide power to connected loads.
This inverter is activated to generate
power to the loads v ia AC output
connector. A t the same time, the utility
is out of range. N o battery is connected
or battery is not available to use at this
moment. O nly PV power is available to
prov ide power to connected loads.
Bypass mode
The inverter is working w ithout DC /INV operation and connecting to the loads.
LC D Display
Description
This inverter is activated to generate
power to the loads v ia AC output
connector. At the same time, PV power
is not detected or available. Only utility
is charging battery and prov iding
power to connected loads.
Inverter fault occurs. But this inverter
is activ ated to generate power to the
loads v ia AC output connector. PV
power is charging battery and the
utility is prov iding power to the
connected loads.
Note: Refer to section 10-2 for
detailed fault reference.
23
This inverter is activated to generate
power to the loads v ia AC output
connector. PV pow er and battery are
not detected or available to use at this
moment. O nly utility is available to
prov ide power to connected loads.
Standby mode :
The inverter is working w ithout DC /INV operation and load connected.
LC D Display
Description
The utility is out of range. This inverter
is disabled on AC power output or ev en
AC pow er output is enabled, but an
error occurs on AC output. O nly PV
power is suff icient to charge battery.
This inverter is disabled to generate
power to the loads v ia AC output
connector. PV pow er is not detected or
av ailable at this moment. Only utility
is av ailable to charge battery.
This inverter is disabled to generate
power to the loads v ia AC output
connector. PV pow er and the utility are
not detected or av ailable at this
moment.
24
12. Charging Management
Default
Value
Charging v oltage
M ax. charging current
25A
F loating charging v oltage(default)
54.0 V dc
M ax. absorption charging
voltage(default)
56.0 V dc
Battery overcharge protection
59.0 V dc
N ote
It can be adjusted v ia software from
5A mp to 25Amp.
It can be adjusted via softw are from
50V ac to 56Vdc.
= F loating charging v oltage + 2Vdc.
But the max. absorption charging
voltage is 57V dc. Therefore, if floating
charging v oltage is set to 56Vdc, then
max. absorption charge voltage w ill
be still 57V dc.
Charging process based on default
setting.
3 stages:
F irst – max. charging voltage
increases to 56V ;
S econd- charging voltage will
maintain at 56V until charging current
is dow n to 5 Amp;
Third- go to floating charging at 54V.
This inverter can connect to battery types of S ealed lead acid battery, Vented battery and Gel
battery. Below is recommended floating charging voltage table based on different battery
ty pes.
Battery ty pe
S ealed lead acid battery
Vented battery
G el battery
N iCd battery
Recommended floating charging v oltage
53.6 V
52.8 V
54.0 V
56.0 V
25
If using sealed lead acid battery, please set up the floating charging current according to
below formula:
The maximum charging current = Battery capacity (Ah) x 0.2
F or example, if you are using 125 Ah battery , then, floating charging current is 125 x 0.2=25
(A ). P lease use at least 25Ah battery because the settable minimum value of maximum
charging current is 5A h. If using gel, v ented or N icd battery, please consult w ith installer for
the details.
Below is setting screen from software:
26
13. Maintenance & Cleaning
Check the follow ing points to ensure proper operation of w hole solar system at regular
interv als.

E nsure all connectors of this inverter are cleaned all the time.

Before cleaning this inverter, be sure to turn off all the breakers (AC breaker, battery
breaker and PV DC breaker).

Clean this inverter, during the cool time of the day, w henever it is v isibly dirty.

Periodically inspect the sy stem to make sure that all w ires and supports are securely
fastened in place.
WA RNING: There are no user-replaceable parts inside of the inv erter. Do not attempt to
serv ice the unit yourself.
Battery maintenance



S erv icing of batteries should be performed or superv ised by personnel know ledgeable
about batteries and the required precautions.
When replacing batteries, replace w ith the same type and number of batteries or battery
packs.
The follow ing precautions should be observed when w orking on batteries:
a) Remove w atches, rings, or other metal objects.
b) U se tools w ith insulated handles.
c) Wear rubber glov es and boots.
d) Do not lay tools or metal parts on top of batteries.
e) Disconnect charging source prior to connecting or disconnecting battery terminals.
f) Determine if battery is inadvertently grounded. If inadvertently grounded, remove
source from ground. Contact with any part of a grounded battery can result in electrical
shock. The likelihood of such shock can be reduced if such grounds are removed during
installation and maintenance (applicable to equipment and remote battery supplies not
hav ing a grounded supply circuit).
CAUTIO N: A battery can present a risk of electrical shock and high short-circuit current.
CAUTIO N: Do not dispose of batteries in a f ire. The batteries may explode.
CAUTIO N: Do not open or mutilate batteries. Released electroly te is harmful to the skin
and eyes. It may be toxic.
27
14. Trouble Shooting
When there is no information displayed in the LCD, please check if PV module connection is
correctly connected.
NOTE: The warning and fault information can be recorded by remote monitoring softw are.
14-1 . War ning List
There are 21 situations def ined as warnings. When a warning situation occurs,
icon w ill
flash and the fault code area w ill display “WR” wordings. You may check softw are for the
detailed w arning situations. P lease contact your installer w hen below warning situations occur.
Warning
CPU is performing the
auto-correction of AD signals.
Data sav ing failure.
Input PV is found lost.
PV input voltage reads low.
P ower island
An E rror occurred in the CPU
initialization
P ower grid voltage exceeds
the upper threshold
P ower grid v oltage falls below
the low er threshold
P ower grid frequency
exceeds the upper threshold
P ower grid frequency falls
below the lower threshold
P ower grid-connected
av erage voltage exceeds the
maximum threshold
E mergent grid disconnection
Battery v oltage is too low.
Low battery
Battery is disconnected.
E nd of battery discharge.
Icon
( flashing)
Description
S ampling adjustment is in process in DSP.
F lash memory fails.
The PV input voltage is out of range.
The input PV voltage is too low to initiate the
inv erter.
Islanding condition is detected.
Initialization failed in CPU w hen the inverter is
turned on.
The grid voltage has exceeded the highest
limit.
The grid voltage is beyond the lowest limit.
The grid frequency has exceeded the highest
limit.
The grid frequency is bey ond the lowest limit.
Average feeding voltage has exceed the upper
limit
The utility is abnormal.
The battery voltage is less than 42V.
Battery v oltage is less than 25% of battery
capacity or the battery v oltage less than 44V.
Battery is not detected.
Low voltage from over discharging. Battery
voltage is below 42V. This battery is charging
now and not achiev ing to 50V y et.
28
Overload
Over temperature alarm
Warning
Icon
Overload
Over temperature
Description
( flashing)
N o electrical ground
G round loss
14-2 . Fault Reference C odes
When a fault occurs, the icon
w ill flash as a reminder. S ee below for fault codes for
reference.
Situation
Fault
Icon
Solution
Fault Event
C ode
( flashing)
01
DC bus voltage exceeds the
1. Disconnect AC circuit
upper threshold
breaker f irst. Then,
02
DC bus voltage falls below
disconnect DC circuit
the low er threshold
breaker.
2.
U ntil LCD screen
03
DC bust voltage soft-start is
completely shuts dow n,
time-out
turn on DC breaker f irst. It
04
Inverter soft-start is
w ill show “N o U tility ” in
time-out
LCD screen. Then, turn on
05
An Inv erter overcurrent
AC breaker. After 300
ev ent is detected
seconds, the system will
07
An relay failure event is
automatically connect to
detected
the grid.
08
DC component in the output
3.
If the error message still
current exceeds the upper
remains, please contact
threshold
your installer.
11
Over-current on PV input is
detected
14
Inverter DC component
exceeds the allow able range
16
Leakage current CT failed
06
Over temperature fault
1. The internal temperature
is higher than specif ied
temperature.
2. Leav e inverter to be
cooled to room
temperature.
3. If the error message still
remains, please contact
your installer.
29
Situation
Fault
C ode
09
Fault Event
Solution
Icon
( flashing)
PV input voltage exceeds
the upper threshold
1.
2.
10
Auxiliary pow er* failed
1.
2.
3.
*Auxiliary power means
sw itch power supply.
12
Leakage current exceeds
the allow able range
1.
2.
3.
4.
30
Check if the open circuit
voltage of PV modules is
higher than 500VDC.
If PV open circuit voltage
is less than 500VDC and
the error message
remains, pelase contact
your installer.
Turn off the inv erter.
Then, restart the inverter.
If the error message still
remains, please contact
your installer.
The ground voltage is too
high.
P lease disconnect AC
breaker f irst and then DC
breaker. C heck if
grounding is connected
properly after LCD screen
completely shuts dow n.
If grounding is correctly
connected, turn on DC
brearker. After it display s
“N o U tility” in LCD screen,
turn on AC breaker. After
300 seconds, the sy stem
w ill automatically connect
to the grid.
If the error message still
remains, please contact
your installer.
Situation
Fault
C ode
13
Fault Event
Solution
Icon
( flashing)
PV insulation resistance is
too low
1.
2.
15
17
20
21
A difference occurred in the
readings from the main and
secondary controllers
Communication w ith the
main and secondary
controllers is interrupted
Discharge circuit fault
S oft start in battery
discharge fails
1.
2.
3.
22
Charging voltage is too high
1.
2.
3.
4.
23
Overload fault
1.
2.
31
Check if the impedance
betw een positive and
negativ e poles to the
ground is greater than
1M Ω.
If the impedance is low er
than 1M Ω, please contact
y our installer.
P lease disconnect AC
breaker f irst and then
disconnect DC breaker.
After LCD screen is
completely off, turn on DC
breaker. U ntil it show s “N o
U tility” in LCD display, turn
on AC breaker. After 300
seconds, the system will
automatically connect to
the grid.
If error message remains,
please contact your
installer.
Check if the connection
betw een battery and
inv erter is well.
M ake sure battery
condition is ok.
Then, restart the inverter.
If error message remains,
please contact your
installer.
Remove exessiv e loads.
Be sure that total
connected loads are less
than maximum pow er
consumption this inverter
can support.
Then, restart the inverter.
Situation
Fault
C ode
24
Fault Event
Solution
Icon
( flashing)
Battery disconnected
1.
2.
25
26
Inverter current is too high
for a long time
S hort circuited on inverter
output
1.
2.
1.
2.
3.
4.
5.
27
Fan fault
1.
2.
3.
32
Check if battery cable is
connected f irmly.
If error message remains,
please contact your
installer.
Remove exessiv e loads.
Then, restart the inverter.
Turn off the inv erter.
Disconnect AC circuit
breaker f irst. Then,
disconnect DC circuit
breaker and then
disconnect the loads.
P lease check if load circuit
is ok. After remov ing the
error, turn on the PV DC
breaker and battery
breaker.
Turn on the inverter.
If error message remains,
please contact your
installer.
P lease check if fans are
runing ok.
If fans are runing ok,
please shut down inverter
f irst and then, restart it.
If fans are stop runing or
error message remains
after restart the inverter,
please contact your
installer.
15. Specifications
MO DEL
Hybrid Inver ter 2KW Hybrid Inver ter 3KW
RATED PO WER
2000 W
3000 W
PV INPUT ( DC)
N ominal DC V oltage
300 VDC
360 VDC
M aximum DC V oltage
350 VDC
500 VDC
S tart-up Voltage / Initial Feeding Voltage
80 VDC / 120 VDC
116 VDC / 150 VDC
MPP Voltage Range
150 VDC ~ 320 VDC
250 VDC ~ 450 VDC
M aximum Input C urrent
15 A
13 A
Isc PV (absolute maximum)
15 A
13 A
M ax. inverter backfeed current to the
0A
0A
array
GRID/UTILITY OUTPUT (AC)
N ominal O utput V oltage
101/110/120/127 VAC
230 VAC
Output Voltage Range
88 - 127 VAC
184 - 265 VAC
47.5 ~ 51.5 H z or
47.5 ~ 51.5 H z or
Output F requency Range
57.5 ~ 61.5 H z
59.3~ 60.5H z
N ominal O utput C urrent
23 A
17 A
Inrush C urrent
23 A
17 A
M aximum O utput F ault Current
69 A
51 A
M aximum output Overcurrent P rotection
69 A
51 A
P ower F actor Range
0.9 lead – 0.9 lag
AC INP UT
AC S tart-up V oltage
60-70 VAC
120-140 VAC
Auto Restart V oltage
90 VAC
194 VAC
A cceptable Input Voltage Range
80 - 130 VAC
184 - 265 VAC
N ominal F requency
50 H z / 60 H z
AC Input P ower
2000VA /2000W
3000VA /3000W
M aximum AC Input Current
30 A
20 A
Inrush Input Current
30 A
20 A
BATTERY MO DE O UTPUT (AC)
N ominal O utput V oltage
101/110/120/127 VAC 208/220/230/240 VAC
Output F requency
50 H z / 60 H z (auto sensing)
Output Waveform
P ure sine w ave
Output P ower
2000VA /2000W
3000VA /3000W
Output C urrent
19.8A/18.2A/16.7A/ 15.7A
14.4A/13.6A/13A/ 12.5A
E fficiency (DC to AC)
90%
92%
BATTERY & CHARGER
N ominal DC V oltage
48 VDC
M aximum Battery C urrent
56 A
82 A
M aximum C harging C urrent
25 A
33
GENERAL
PHY SICAL
Dimension, D X W X H (mm)
N et Weight (kgs)
INTERACE
Communication P ort
Intelligent S lot
480 x 438 x 117
15.57
RS -232/USB
Optional SNMP , M odbus and AS-400 cards
av ailable
ENVIRO NM ENT
P rotective C lass
I
Ingress P rotection Rating
IP 20
H umidity
0 ~ 90% RH (N o condensing)
Operating Temperature
0 to 40°C
Altitude
0 ~ 1000 m*
*P ower derating 1% every 100 m w hen altitude is over 1000m.
34