SUNKET-ESS SKT4KTL3H User manual

SKT4KTL3H
SKT8KTL3H
SKT5KTL3H
SKT10KTL3H
SKT6KTL3H
SKT12KTL3H
User Manual
: sunketess.com / sunketpower.com
: [phone]
: [email protected]
- Installation
- Operation
- Maintenance

Contents
3.2.4 ESS Working Modes Setting Instruction
3.2.3 Monitoring and Setting
3.2.2 WiFi Configuration
3.2.1 Software acquisition
2.4.3 PV Connection
2.4.2 Overview Of The Electrical Connecting Part
2.4.1 System Wiring Diagram
2.3.2 Mounting The Inverter
2.3.1 Requirements For Mounting
1.3.4 Peak shaving and valley filling mode
1.3.3 Micro-grid mode
1.3.2 Battery backup mode
1.3.1 General mode(Default)
1.1.2 SAFETY WARNING
1.1.1 Symbols Explanation
1.1 Safety Symbois & Warnings
3.2 Monitoring System
2.8 Smart meter connection
2.7 Declaration for ESP Loads
2.6 Grid & ESP Connection
2.5 Battery Connection
3.1 LED and LCD Display
2.4 Electrical Connection
2.3 Mounting
2.2 Unacceptable Installations
2.1 Unpacking and Checking
1.3 Operation Modes Introduction
1.2 System Diagram
3 Operating of the Inverter
2 lnstallation
1 lnstallation
Contents
19
18
17
17
17
15
4 Trouble Shooting 24
15
6
1
5 Technical Data 27
6 Appendix:
Smart Meter Connection Instruction 29
14
13
13
11
10
10
9
9
8
7
7
6
6
4
4
4
3
3
3
2
1
1

Introduction Introduction
SKT

43
Instruction Instruction
SKT
3

Introduction Installation
65
1.3.4.1) In the valley level, the grid and PV charge the batteries.(Fig:1.3.4.1)
Fig:1.3.4.1
1.3.4.2) In the flat stage,if the PV is sufficient,the battery can be charged(Fig:1.3.4.2A); if
the PV is insufficient, Priority is for loads(Fig:1.3.4.2B).
Fig:1.3.4.2A Fig:1.3.4.2B
1.3.4.3) In the peak level.
Fig:1.3.4.3(A)(PV is sufficient) Fig:1.3.4.3(B)(PV is insufficient)
2 Installation
2.1 Unpackingand Checking
On receiving the inverter, please check before installation to make sure all the
components as below are not missing or damaged.
2.2 Unacceptable Installations
Please avoid thefollowing installations, which will damage the system or the inverter.
Inverter×1 Smart Meter×1
with 3 CT
Positive PV
connector×2
AC Connector×2
Positive PV
connector×2
Positive Bat
connector×1
Positive Bat
connector×1
Installation Screw
packet User manual×1
RJ45 Connector×2

2.3 Mounting
2.3.1 Requirements For Mounting
The installation of the inverter should be protected under shelter from direct sunshine or
any bad weather conditions as shown below:
Fig.2.1
The inverter should be installed in a cool & dry place with temperature from -25 to
60 (High ambient temperature will cause the inverter’s power derating).
The inverter LCD should be leveled with eyes and with enough space in the front for
inspection.
The inverter should be installed on a vertical wall or within 15°at most if backwards to the
wall
Fig.2.2
To avoid burning and electric shock, the inverter should be installed beyond reach of
children.
Make sure the installation position does not shake.
No Direct Sunlight No Exposure to Rain and Snow Direct Sunlight ×Exposure to Rain and Snow ×
Leave enough space around the inverter as shown below:
Fig.2.3
2.3.2 Mounting The Inverter
Step 1: Use the positioning the cardboard as template to drill 4 holes on walls.
Fig.2.4
Step2:
Fig.2.5
Position Min.Size(CM)
Front 40CM
Lateral
Top
Bottom
40CM
40CM
50CM
87
Installation Installation
Fix the borad to the wall using the tapping screws tightly.

Installation
9
Installation
10
Fig.2.6
2.4 Electrical Connection
2.4.1 System Wiring Diagram
General wiring diagram of SKT series hybrid inverter.
Fig.2.7
2.4.2 Overview Of The Electrical Connecting Part
Fig.2.8
2.4.3 PV Connection
Before connecting PV panels/strings to inverter, please make sure:
1) Use the right PV connectors in the accessory box.
2) The voltage, current and power ratings of the PV strings are within theallowable range
of the inverter. Please refer to the Technical Data Sheet for voltage and current limits.
3) Make sure the PV switch of the inverter is in the “OFF” position during wiring.
4) PV strings could not connect to EARTH conductor.
STEP1:
Assemble the PV connectors from the accessory box.(PV cable must be firmly crimped
into connectors)
Fig.2.9
STEP2:
Connect the PV connectors to the inverter. There
will be a click sound if connectors are inserted correctly
into PV plugs.
Fig.2.10
Step 3:Screw on the back of the box to ensure that the inverter is parallel to the wall,
and attach inverter to the wall bracket slightly to the top of its final position
Battery
Solar
KW·h
1024 Grid
N
Uc
Ub
Ua
Loads
AC Breaker
AC Breaker
AC Breaker
Billing Meter
3-phase Loads
CT Direction
CTa
CTb
CTc
A
B
C
N
Smart Meter Box
BMS
5 6 7 8 910 21 22 23
1 2 3 4 13 12
FNSet
ON
OFF PV1
+
-
Meter
Power
AC OUT
+
-
PV2
+
-
Battery
BMS
ON
OFF PV1
+
-
Meter
Power
AC OUT
+
-
PV2
+
-
Battery

Installation
11 12
Installation
2.5 Battery Connection
Battery connection diagram
Fig.2.11
1) Use the right BAT connectors in the accessory box.
2) Choose 4 to 6 mm²(AWG 10) tin-plated cable to connect the battery and the inverter.
3) Make sure battery switch is off and battery nominal voltage meets SKT series
inverter’s specification before connecting battery to inverter.
STEP1:
Assemble the battery connectors from the accessory box.(battery cable must be firmly
crimped into connectors)
Fig.2.12
STEP2:
Connect the battery connectors to the inverter.
There will be a click sound if connectors
are inserted correctly into battery plugs.
Fig.2.13
STEP3:
Connect the BMS cable between battery and inverter, insert the RJ45 connector with
water-proof cap intothe port marked “BMS” on inverter and fasten the cap. Then insert the
other end of the cable intothe battery port.
Position Color
1Orange&white
Orange
Green&white
Blue
485_A2
NC
Blue&white
Green
Brown&white
Brown
2
3
4
5
6
7
8
485_B2
CAN_H
CAN_L
NC
NC
NC
Fig.2.14
+-
CAN
Batery Power
BMS
BMS
ON
OFF PV1
+
-
Meter
Power
AC OUT
+
-
PV2
+
-
Battery

Installation
14
Installation
13
Fig.2.16
STEP2:
Connect the grid connector and the EPS connector
to the inverter. Just follow the markings on the
inverter to connect them correctly.
2.7 Power key and Declara n for EPS Loads
Fig.2.17
The power button on the rear panel is only used for EPS function.
When mains power does not exist and EPS function is enabled, press and hold for 3
seconds, the inverter will enter backup mode;
When inverter operates in backup mode, press and hold for 3 seconds, inverter will exit
backup mode;
When inverter gives an alarm and shutdown in backup mode, press and hold for 3
seconds, inverter will clear alarm.
Inductive load: a non-frequency conversion air conditioner within 1.5P can be connected
to EPS side. Two or more may cause EPS output unstable.
Do not connect 3-phase inductive load(like motor) without Neutral line to EPS side.
Capacitive load: Total power <=0.6*nominal power of model.
2.8 Smart meter connection
Please Refer to the connection instructions in the meter
box for connection
2.6 Grid & EPS Connection
Use the AC connectors from accessory box for grid and EPS connection. An external AC
breaker(32A) is needed for on-grid connection to isolate from grid
when necessary .
STEP1:
Assemble the grid connector. Follow the markings on the
connectors, make sure 3L/N/PE lines are connected correctly.
Fig.2.15
w

Operating of the Inverter
15 16
Operating of the Inverter
3 Operating of the Inverter
3.1 LED and LCD Display
The LED indicators are shown as blow:
LED Status Explanation
SYSTEM ON System is powered up
OFF System is not powered up
GRID
ON Grid is normal
OFF Grid loss
FLASH Grid is abnormal
EPS ON Inverter in offline mode, EPS is
active
OFF Inverter is not in offline mode
COM ON WIFI module connected
OFF WIFI module not connected
METER ON Smart meter communication OK
OFF Smart meter communication fail
FAULT
ON Alarm occurred and inverter stop
work
OFF No Alarm
FLASH Alarm occurred but inverter still work
The LCD display shows the detailed information of the inverter
PV12
A
C
A
B
C
B
A
B
C
D
E
F
G
HIJK
L
M
N
O
P
Q
R
Position Description
AIt indicates the power output amount of total and today alternately. Unit: kWh or MWh
BPV panels indicator
CPV1,PV2 panels parameters. Voltage and current are displayed alternately.
DTotal PV power
EBattery parameters. Voltage and current are displayed alternately.
FBattery power
GBattery indicator
HSOC of battery
ICurrent time
J
Power flow array of battery. When it towards battery, it means charging; when it towards inverter,it
means discharging.
KDefault as current date. When an error occurs, fault code will be displayed alternately.
L Loads indicator
MLoads power consumption of each phase
NLoad parameters. Voltage and current of each phase are displayed alternately.
OPower export or import of each phase
PGrid indicator
QGrid parameters. Voltage and current of each phase are displayed alternately.
RPower flow array of load