Kilowatt Labs CENTAURI ENERGY SERVER User manual

CENTAURI ENERGY SERVER
User Manual
Model number: GF-20000-360Vdc-380Vac-3/3
Version 1.0; Release Date: October2019
Author:
Mamoona Khalid
(BS-EE, MS-EEE)

Introduction
The Centauri Energy Server is the first comprehensive, stand-alone, fully integrated power electronics
hardware + software platform that delivers utility grade power from any combination of DC or AC
generation sources and storage. The Centauri replaces integrated systems comprised of multiple
components (PV inverter + charge controller + battery inverter + communication software and
hardware + safety devices etc.) and can be deployed in any location, to service any kind of load profile
(from kW to MW), with or without grid access or generator availability.
The Centauri Energy Server is equipped with high speed digital DSP core control devices, advanced
high-speed IBGT, MOSFET and other power devices, combined with disturbance type (SVPWM) MPPT
control technology with pulse width modulation and double transformation system so that it can
quickly track the polar plate for the control system of high power, load change and high efficient
multiple levels under the control of the high speed DSP system to provide the load with high quality
power supply featuring stable voltage and frequency even in the cases of a sudden change of AC input
voltage and AC frequency, over/under voltage.
Legal Provisions
No part of this User Manual (“Manual”) may be reproduced, or transmitted, in any form or by any
means, without the prior written permission of Kilowatt Labs, Inc. (“Kilowatt” or the “Company”).
Specifications in this Manual are subject to change without notice. While every attempt has been
made to make the Manual accurate and up-to-date, users are cautioned that product improvements
may cause the Company to make changes to specifications without advance notice. Users are
encouraged to consult the Company or its Resellers before using the Manual. Neither the Company
nor its Resellers shall be liable for any indirect, incidental, or consequential damages under any
circumstances caused by reliance on the material presented, including, but not limited to, omissions,
typographical errors, arithmetical errors or listing errors in the content material. The content of this
manual shall not be modified without the written authorization of the Company.
Trademarks
All trademarks are recognized, even if not explicitly identified as such. Kilowatt Labs® is a registered
trademark of the Company.

Centauri Energy Server –User Manual Model Number - GF-20000-360Vdc-380Vac-3/3
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Table of Contents:
1. Safety Precautions: ......................................................................................................................... 7
2. Energy Server Overview:................................................................................................................. 8
2.1 Part Number:................................................................................................................................. 8
2.2 Production Profile: ........................................................................................................................ 8
2.3 System Architecture of Product:................................................................................................... 9
3 Description of Product Control:.........................................................................................................10
3.1 Control Panel:.............................................................................................................................. 10
3.2 Description of Touch Screen:......................................................................................................10
3.3 STATUS (System Warning LED) and Warning:.............................................................................14
3.4 Introduction of Buttons: .............................................................................................................15
3.4.1 Description of Selection Button Function: ............................................................................15
3.4.2 Description of Function Buttons: .......................................................................................... 16
3.5 Introduction of Breaker: .............................................................................................................17
3.6 Introduction to Line Bank: .......................................................................................................... 18
3.7 Description of Remote-Control Signal Input:..............................................................................18
3.8 Description of Output Signal at System Dry Contact:.................................................................19
4. Storage and Installation of Energy Server:........................................................................................20
4.1 Storage:.......................................................................................................................................20
4.2 Installation Notices: ....................................................................................................................20
4.3 Unpacking and Content Check:................................................................................................... 21
4.4 Determination of Mounting Positions: .......................................................................................21
4.5 Cabinet Handling:........................................................................................................................ 22
4.6 Requirements of Battery Configuration:.....................................................................................23
4.7 Incoming Line Way of System:.................................................................................................... 24
4.8 Requirements of External Distribution: ......................................................................................24
4.9 Power Cable: ...............................................................................................................................25
4.10 System Wiring: ..........................................................................................................................26
4.11 Communication Interface: ........................................................................................................27
4.12 Signal Interface: ........................................................................................................................27
5. Operating Instructions: .....................................................................................................................29
5.1 Daily ON/OFF:..............................................................................................................................29
5.1.1 Daily on Steps:....................................................................................................................... 29
5.1.2 Daily OFF Steps:..................................................................................................................... 30

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5.2 Emergency Stop Operation:........................................................................................................30
5.3 Clear Operation for System Fault:............................................................................................... 30
5.4 Operation Steps of MaintenanceBypass:……………………………………………………………………………………33
5.4.1 Manual Bypass ON: ............................................................................................................... 31
5.4.2 Entering Service Mode: ......................................................................................................... 31
5.5 System Setup:.............................................................................................................................. 32
5.5.1 Advanced Setup: ...................................................................................................................... 32
5.5.1.1 System Mode setting:......................................................................................................... 33
5.5.1.2 PV Auto Power-ON Setting:................................................................................................33
5.5.1.3 Input Setup of Battery Parameters: ...................................................................................33
5.5.1.4 Password Setting:............................................................................................................... 34
5.5.1.5 Other Settings:.................................................................................................................... 35
5.5.2 User Setup:............................................................................................................................... 35
5.5.2.1 MPPT Setup: ....................................................................................................................... 35
5.5.2.2 INV Setup:........................................................................................................................... 35
5.5.2.3 Off-Peak Setup:...................................................................................................................35
5.5.2.4 Protocol Setup:................................................................................................................... 36
5.5.2.5 Language Selection:............................................................................................................36
5.5.2.6 Setup of Date and Time:..................................................................................................... 36
5.5.2.7 Setup of Date Format:........................................................................................................ 36
5.5.2.8 User Password/Control Password:..................................................................................... 36
5.5.2.9 Touch Screen Calibration: ..................................................................................................36
6. Description of Working Principle:.....................................................................................................37
6.1 PV and AC normal: ...................................................................................................................... 37
6.2 AC abnormal or Absent:..............................................................................................................38
6.3 Off-Peak Power Consumption:.................................................................................................... 39
6.4 System failure: ............................................................................................................................ 40
7. Maintenance:.................................................................................................................................... 41
7.1 Preventive Maintenance:............................................................................................................ 41
7.2 Maintenance of Battery:............................................................................................................. 41
7.3Troubleshooting:……………………………………………………………………………….………..………………………….45
7.3.1 Common Troubleshooting:....................................................................................................42
7.3.2 MPPT Troubleshooting:.........................................................................................................46

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Table of Figures:
Fig 1 Composition of Off-grid Photovoltaic System................................................................................ 9
Fig 2 System Architecture of Product ..................................................................................................... 9
Fig 3 System Control Panel ................................................................................................................... 10
Fig 4 Description of Touch Screen......................................................................................................... 10
Fig 5 Schematic Diagram of System Installation................................................................................... 22
Figure 6 Schematic Diagram of System Handling .................................................................................23
Fig 7 Signal Interface of Remote Control.............................................................................................. 28
Fig 8 Signal Interface of Output Dry Contact ........................................................................................ 28
Fig 9 Normal Mode 1 of PV and AC....................................................................................................... 37
Fig 10 Normal Mode 2 of PV and AC..................................................................................................... 37
Fig 11 AC Abnormal Mode 1 .................................................................................................................38
Fig 12 AC Abnormal Mode 2 .................................................................................................................38
Fig 13 Off-Peak Setup Mode 1 .............................................................................................................. 39
Fig 14 Off-Peak Setup Mode 2 .............................................................................................................. 39
Fig 15 Off-Peak Setup Mode 3 .............................................................................................................. 40
Fig 16 Mode 4 for Off-peak Electricity Consumption ...........................................................................40

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Table of Tables:
Table 1a Description of Menu Icon of touch screen............................................................................. 12
Table 1b Description of Button Symbol of touch screen...................................................................... 14
Table 2a System LED and Alarm 1.........................................................................................................15
Table 2b System LED and Alarm 2 ........................................................................................................15
Table 3 Description of selection Buttons.............................................................................................. 16
Table 4 Description of Function Buttons .............................................................................................. 16
Table 5 Introduction of Breaker............................................................................................................ 17
Table 6 Description of Line Bank...........................................................................................................18
Table 7 Description of Remote-Control Signal Input............................................................................ 19
Table 8 Description of Output Signal at System Dry Contract.............................................................. 19
Table 9 Reference List of Power Cable .................................................................................................26
Table 10 Comparison Table of Common Faults.................................................................................... 45
Table 11 MPPT Warning Information ................................................................................................... 47

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1. Safety Precautions:
Please comply with the following precautions for safe use:
•Installation and maintenance must be done only by authorized technicians.
•During the installation of this product, the distance between the Energy Server and the wall
should be more than 300 mm to ensure ventilation and heat dissipation of the system.
•The temperature of the surface of the cabinet may rise when the product is in normal operation.
•Since the battery packs of all series inverters are external, the product should be equipped with
the battery packs which should meet the requirements of the rated voltage of the equipment
when in operation.
•Do not open the cabinet of the inverter, otherwise it may cause an electric shock.
•The internal inspection and maintenance should be conducted only by the authorized technical
personnel.
•After the Energy Server is turned OFF, its voltage may be still high for a long time, please do not
open the cabinet because it may cause an electric shock.
•The “Manual Bypass” switch is used for maintenance and repair of the product; therefore,
authorized technical personnel should open it.
•This system is provided with multiple PV inputs; therefore, it should be connected with the
independent loop, without the electrode grounded.
•The “EPO”button on the panel is used for the emergency stop power supply (power off) of the
Energy Server, please pay attention to its operation.
•The internal short circuit of the Energy Server will lead to the risk of an electric shock or a fire,
therefore under no circumstances should liquids be placed on it in order to avoid electric shock
or other hazards.
•Please use the dry powder fire extinguishers in the event of a fire, because the use of the liquid
fire extinguisher may cause an electric shock.
•Please install the external power switch near the Energy Server so that the power supply can be
cut OFF in the event of emergency.
•Do not store or install the Energy Server:
→Outdoors.
→In locations without cross ventilation.
→In locations near or where there is combustible gas, corrosive substances or dust.
→In locations with unusually high or low temperatures (above 40oC or below 0oC) or high

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humidity (90%).
2. Energy Server Overview:
2.1 Part Number:
1. Isolated Off-Grid Type
2. Capacity of Energy Server in W
3. DC Input Voltage
4. AC Output Voltage:
5. 3/3 System Input/output
2.2 Production Profile:
The OFF-grid photovoltaic power generation system mainly consists of the PV Panels, combiner box,
Energy Server, Battery and Load. The solar energy of the PV panels is sent to the combiner, after
converging, solar energy is sent to the PV input of the Energy Server, where it changes the DC into AC
to feed the load. At the same time, the Energy Server also changes AC into DC by rectifier and change
the DC into AC to the load as shown in Fig 1.
Warning!
1. The Energy Server must be reliably grounded.
2. The loss caused by the improper operation may be huge, please operate
the equipment by following the requirements of specifications.

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Fig 1 Composition of Off-grid Photovoltaic System
2.3 System Architecture of Product:
Fig 2 System Architecture of Product

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3 Description of Product Control:
3.1 Control Panel:
Fig 3 System Control Panel
3.2 Description of Touch Screen:
Fig 4 Description of Touch Screen

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Menu Icon
Menu Name
Menu Items
Definition
Input Parameters
Line Voltage(V)
Input line voltage of rectifier
Current (A)
Input current of rectifier
Frequency (Hz)
Input frequency of rectifier
Power factor
Input power factor of
rectifier
Bypass parameters
Phase voltage (V)
Phase voltage
Frequency (HZ)
Frequency
Output parameters
Phase Voltage(V)
Output phase voltage of
inverter
Phase Current (A)
Output phase current of
inverter
Frequency (HZ)
Output frequency of
inverter
Power factor
Power factor of load
Load parameters
Apparent Power
(KVA)
S out: Apparent power
Active power (KW)
P out: Active power
Load percentages
(%)
Load (Energy Server, shows
by the rated load
percentage)
Parallel machine
parameters
Apparent Power
(KVA)
S out: Apparent power
Active power (KW)
P out: Active power
Single machine
system without
parallel machine
data
When the Energy Server is
set as a single machine, it
only includes its own load
instead of the system load.
Battery Parameters
DC BUS voltage (V)
Operating voltage of system
DC BUS

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Battery voltage (V)
Voltage of system battery
pack
Battery Current (A)
Battery charging and
discharging current
Battery
temperature
Ambient temperature of
current battery pack
Environment
temperature(t)
Environment temperature
inside the Energy Server
Battery Status
Battery pack switch is
opened
System Generated
Energy
Generated power
Current total system
generated power
Daily Generated
Energy
Daily gross generation of the
system
Gross Generation
Accumulative gross
generation of the system
MPPT (1- n) Parameters
Module version
Module software version
PV voltage
PV voltage input by MPPT
n# single Module
PV current
PV current input by MPPT
n# single Module
Battery Voltage
Battery voltage detected by
the current MPPT Module
Charging Current
Current Battery charging
voltage
Module Status
Current Module status
Table 1a Description of Menu Icon of touch screen

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Button Symbols
Name
Functions
Setup
Click this button to enter the
system setup interface.
ON/OFF
Click this button to execute
ON/OFF option and the
operation is effective after
confirmation.
Battery pack parameters
Click this button to view the
battery voltage and
charging/discharging cutout and
battery connection.
Input parameters of rectifier
Press this button to view the
operating parameters of the
rectifier.
Input parameters of bypass
Press this button to view the
bypass input operating
parameters.
O/P
Output parameters
Press this button to view the
system output operating
parameters.
Battery self-check and
maintenance
Press this button to set battery
test or terminate the test.
History button
Press this button to view the
history of the Energy Server
system.
Skip button
Press this button to view
another data message in the
same directory.
Return to the main interface
The system will return to the
system main control interface by
pressing this button.
Return to the superior menu
The system will return to the
directory's superior menu by
pressing this button.
Page down button
Page down button
Page up button
Press this button to turn to the
front page.

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Left shift button
Press the button to move one bit
to the left.
Right shift button
Press the button to move one bit
to the right.
UP/DOWN switch button
Press this button to skip
up/down.
OK button
Press this button to confirm the
operation above.
Delete button
Press this button to delete the
operation.
Table 1b Description of Button Symbol of touch screen
3.3 STATUS (System Warning LED) and Warning:
SYS-LED Status
Function Description
Buzzer Status
Red light being normally
ON
EPO, emergency stop
Along beep
Communication fault
System fault
The red-light flashes once
per second
Low voltage of battery
A beep per second
The delay of bypass overload is
over
Overload timeout for this
machine
Fan fault
Output overload
The red-light flashes once
per 4 seconds
Other normal alarm
information
A beep per 4 seconds
The red-light flashes once
per 2 seconds
Battery test
A beep per 2 seconds

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The green light is normally
ON.
System normal
No beep
Table 2a System LED and Alarm 1
LED
The red light is
normally ON
The green
light is
normally
ON
OFF
Green lighting flash
BYP (bypass
power supply)
Bypass input
fault
System
bypass
supplies
the power.
Bypass
standby
No
PV(MPPTLED)
PV/MPPT fault
Running
normally
MPPT is not
booted.
OFF/under-voltage
/OFF charging of
part of MPPT
Module
REC (Rectifier
LED)
REC input/fault
Running
normally
Rectifier
shutdown
Rectifier is starting
INV (Inverter
LED)
INV fault
The
inverter
can supply
the power
normally.
Inverter
shutdown
Inverter soft startup
stand by
BAT (Battery
LED)
Battery under
voltage/fault
Battery
supplies
the power
Normal state
Battery test/ under-
voltage
Table 2b System LED and Alarm 2
13.4 Introduction of Buttons:
3.4.1 Description of Selection Button Function:
The display screen supports two control modes, namely the button control and touch control. The
system default state is in the touch screen input mode, the corresponding operations are available
through clicking the icon on the LCD screen.

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Table 3 Description of selection Buttons
•Click the “ ” button on any interface to switch to the button control mode, and then press the
“” button to return to the touch screen control mode.
•After clicking “ ” button, the user can move the cursor through pressing “ ” or “ ” button
to choose the required control button and then press the “ ” button for confirmation.
3.4.2 Description of Function Buttons:
Button Symbols
Name
Functions
INV ON
ON button
When this button is pressed, the system
executes the boot command and then runs
after pressing the “OK” button.
INV OFF
OFF button
When this button is pressed, the system
executes the shutdown command and the
shutdown operation is effective by pressing the
“OK” button. At this moment, the system and
the output shut down.
SILENCE ON/OFF
Beep ON/OFF
The system alarm is cancelled or activated by
pressing this button.
FAULT CLEAR
Clear the system
fault
Press this button to clear executed abnormal
protection command, the system will restart
and run.
EPO
Emergency stop
When this button is pressed, the system
immediately put an end to the power supply.
Table 4 Description of Function Buttons

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3.5 Introduction of Breaker:
Signs
Name
Function
DC START
DC start switch
When the DC start breaker is
turned ON, the system performs
the battery soft start.
MANUAL BYPASS
Manual bypass switch
This breaker is only operated by the
professional maintenance staff and
the load will be connected directly
to the bypass input by switching ON
this button.
OUTPUT
Output switch
Turning ON the output breaker will
make a connection between the
load and the system static switch.
BYPASS
Bypass switch
Turn ON the Bypass breaker to
switch ON the bypass AC input.
RECTIFIER
Rectifier switch
Turn ON the Rectifier breaker to
switch ON the rectifier AC input.
PV1#
PV 1# input switch
When the switch is enabled, the
system MPPT 1# will supply the
power.
PV2#
PV 2# input switch
When the switch is enabled, the
system MPPT 2# will supply the
power.
PV3#
PV 3# input switch
When the switch is enabled, the
system MPPT 3# will supply the
power.
PV4#
PV 4# input switch
When the switch is enabled, the
system MPPT 4# will supply the
power.
Table 5 Introduction of Breaker

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3.6 Introduction to Line Bank:
R
S
T
N
R
S
T
N
R
S
T
AC INPUT
BYPASS INPUT
AC OUTPUT
PV+4#
PV+3#
PV+2#
PV+1#
PV-4#
PV-3#
PV-2#
PV-1#
PV+ INPUT
PV- INPUT
BAT+
Signs
Functions
PV - INPUT
PV#1-PV#4 Input terminal pole
PV + INPUT
PV#1-PV#4 Input terminals “+” pole
AC INPUT
“R” line, “S” line and “T” line of rectifier input terminal
BYPASS INPUT
“R” line, “S” line “T” and “N” line of bypass input terminal
AC OUTPUT
“R” line, “S” line, “T” line and “N” line of system output
terminal
BATT +
Battery Input terminals “+” pole
BATT -
Battery Input terminals “-” pole
Table 6 Description of Line Bank
3.7 Description of Remote-Control Signal Input:
Signs
Name
Control
Method
Description of System
Action
BAT.TEMP
Battery Temperature
Sensing
The battery temperature
Coefficient is used for the
charge compensation.
BAT.TEST
Battery Self-Check
The short
circuit time is
The system performs the
battery test.
BAT-

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INVON
System ON
no less than
0.2s
The system turns ON.
INVOFF
System OFF
The system shuts down.
FAULT CLEAR
Clear faults
Press this button to clear
executed abnormal
protection command, the
system will restart and run.
EPO
Emergency stop
The system stops.
Table 7 Description of Remote-Control Signal Input
3.8 Description of Output Signal at System Dry Contact:
English Name
Chinese name
Normally Closed
Nodes
Normally Opened
Nodes
FAN FAULT
Fan fault
Fan normal
Fan fault
SYSALRAM
System alarm
No system
alarm
System alarm
GENERATOR
ON/OFF
Generator ON/OFF
Generator OFF
Generator ON
BAT LOW
Battery low voltage
No low voltage
alarm for
battery
Battery low voltage
OVERLOAD
Output overload
Output normal
Output overload
BYP FAULT
Bypass fault
Bypass input is
abnormal
Bypass fault
AC FAULT
Rectifier fault
Rectifier input is
abnormal
Rectifier fault
SYS FAULT
System fault
System is
normal
System fault
Table 8 Description of Output Signal at System Dry Contract

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4. Storage and Installation of Energy Server:
4.1 Storage:
If the Energy Server is not to be installed immediately, please do not remove the packing, and store
the Energy Server vertically in a dry room facing towards sunshine according to the mark on the
packing box, and avoid dust and high temperature.
4.2 Installation Notices:
This section gives a general description of the requirements of the Energy Server for the site selection
and wire layout of the Energy Server.
•The installation site must be provided with the professional engineers authorized by the company
for the guidance of installation.
•Ground the Energy Server properly and turn OFF all switches before making electrical connections.
•The Energy Server should be installed by qualified engineers according to the descriptions in this
section following the local standards.
•When connecting the battery, the voltage at the battery terminal will be more than 360 VDC which
possesses the risk of the fatal danger.
→Please take off the rings, bracelets, watches, and other metal jewelry.
→Use tools having insulated handle(s).
→Please wear rubber gloves.
→If there is leakage of the battery electrolyte or the battery is broken, please replacethe battery
and put it in the container with the resistance to sulfate corrosion and dispose it according to
the local regulations.
→When your skin contacts the electrolyte, please wash it with water immediately.