SunSynk SYNK-3.6K-SG04LP1 User manual

ECCO
HYBRID INVERTER
USER MANUAL
v.21 (12/11/23)
SYNK-3.6K-SG04LP1 / SYNK-5K-SG04LP1
PLEASE RETAIN FOR
FUTURE REFERENCE
www.sunsynk.com
[email protected]
[email protected]

ECCO SG04LP1 | User Manual2
Table of Contents
SAFETY 3
General Safety 3
Symbols/Safety Signs 3
Safety Instructions 5
Product Disposal 5
PRODUCTINTRODUCTION 6
Product Overview 6
Product Size 7
Product Features 8
Basic System Architecture 9
TECHNICALSPECIFICATIONS 10
INSTALLATION 12
Parts List 12
Selecting the Mounting Area 13
Mounting the Inverter 14
Battery Connection 15
Function Port Denition 17
Connecting a Lithium Battery 18
Lead-Acid Battery Temperature Sensor 19
Connecting the AC 20
Recommended AC Surge Protector 21
PV Connection 22
PV Module Selection 22
PV Module Wiring 22
PV Protection 23
Installing the CT Coil 23
Meter Connection 25
Connection for the CHNT Meter 25
Earth Connection (MANDATORY) 26
Wiring System for Inverter 27
Single-Phase Parallel Connection 28
Three-Phase Parallel Inverter 29
OPERATION 30
Switching ON/OFF 30
Display 30
LED Indicators 30
Function Buttons 30
LCD Operation Flow Chart 31
Home Page 32
Status Page 32
System Flow Page 33
Setup Page 34
Basic Setup 35
Set Time (Clock) 35
Set Company Name / Beeper / Auto dim 35
Factory Reset and Lock Code 36
Inverter Remote Control 37
Battery Setup Page 37
Generator & Battery Page 38
Battery Discharge Page 40
Setting Up a Lithium Battery 42
Program Charge & Discharge Times 48
Grid Supply Page 52
Paralleling Inverters Advanced Settings 56
Connecting the DRM’s 59
Advanced Function Setup 60
Solar Power Generated 60
Grid Power 61
Advanced Settings for Wind Turbines 62
Advanced Settings for Auxiliary Load 63
OPERATINGMODES 66
Mode I: Basic 66
Mode II: With Generator 66
Mode III: With Smart Load 67
Mode IV: AC Couple 67
FAULTCODES 69
COMMISSIONING 73
Start-Up / Shutdown Procedure 73
Inverter Commissioning Info 73
GDFI Fault 74
MAINTENANCE 74
APPENDIXA 75
APPENDIXB 76
APPENDIXC 76
APPENDIXD 76
APPENDIXE 76

ECCO SG04LP1 | User Manual3
SAFETY
GeneralSafety
This device should only be used in accordance with the instructions within this manual and in compli-
ance with local, regional, and national laws and regulations. Only allow this device to be installed, oper-
ated, maintained, and repaired by other people who have read and understood this manual. Ensure the
manual is included with this device should it be passed to a third party.
DO NOT allow minors, untrained personnel, or person(s) suering from a physical or mental impairment
that would aect their ability to follow this manual, install, maintain or repair this device.
Any untrained personnel who might get near this device while it is in operation MUST be informed that it
is dangerous and instructed carefully on how to avoid injury.
Symbols/SafetySigns
This symbol indicates information that if
ignored, could result in personal injury,
physical damage or even death due to
incorrect handling.
CE mark is attached to the solar
inverter to verify that the unit follows
the provisions of the European Low
Voltage and EMC Directives.
Risk of burn. Refer to the operating instructions.
5min
Risk of electric shock.
DO NOT touch the terminal or remove
the shell within 5 minutes after discon-
necting all power.
The UKCA marking is used for products
placed on the market in Great Britain
(England, Scotland and Wales). The
UKCA marking applies to most prod-
ucts for which the CE marking could be
used.
Keep the equipment well-ventilated.
ONLY qualied personnel should install
or perform maintenance work on the
units.
This product's batteries contain an ex-
plosive, self-reactive material that could
blow up when heated.
Warranty Void if Seal is Broken
Be careful when touching the inverter!
It is an electrical product with risk of
electric shock and heating.
Store below 25°C.
Indicates that this product is recyclable. Keep the product out of reach of chil-
dren!
Keep away from open ames and
moisture.
Avoid unsuitable shoes for installing
and operating the inverter.

ECCO SG04LP1 | User Manual4
V DC 48 V
230V
15.70 A
BATTERY INPUT
Battery Discharge Voltage, Battery
Discharge Current, Input Voltage Type,
Battery Discharge Power.
V DC 48 V
230V
15.70 A
AC OUTPUT
Output Voltage, Input Voltage Type, Ac
Output Rated Current, Max AC Current,
Output Frequency, Max AC ISC, Power
Factor & AC Output Rated Power.
V DC 48 V
230V
15.70 A
TEMPERATURE
Ambient, Min & Max.
V DC 48 V
230V
15.70 A
PV INPUT
PV Input Voltage, Number of MPPT's,
MPPT Input Current & Max PV ISC.
V DC 48 V
230V
15.70 A
Net Weight in Kilograms.
V DC 48 V
230V
15.70 A
Protective Conductor Terminal or Earth
Ground Terminal.
V DC 48 V
230V
15.70 A
Single Phase.
V DC 48 V
230V
15.70 A
Three Phase.
V DC 48 V
230V
15.70 A
Inverter DC to AC.
WARRANTYREGISTRATION
Scan the QR code to access our web-
site and sign up for the manufacturer’s
warranty.
MANUALDOWNLOAD
Download the latest version of the
instruction manual by scanning the QR
code.
Do not dispose the device, accesso-
ries, and packaging with regular waste.
Follow local ordinances or contact the
manufacturer for disposal guidance.
V DC 48 V
230V
15.70 A
CONTINUOUS OUTPUT
CURRENT
Maximum Continuous Output Current,
Output Frequency and Voltage, & AUX
(programmable AC output on battery
SOC).
3

ECCO SG04LP1 | User Manual5
SafetyInstructions
This chapter contains important safety and operating instructions. Read and keep this manual for future
reference.
Before using the inverter, please read the instructions and warning signs of the battery and correspond-
ing sections in the instruction manual.
Do not disassemble the inverter. If you need maintenance or repair, take it to a professional service
center.
Improper reassembly may result in electric shock or re.
To reduce the risk of electric shock, disconnect all wires before attempting any maintenance or cleaning.
Turning o the unit will not reduce this risk.
Never charge a frozen battery.
For optimum operation of this inverter, please follow the required specications to select the appropri-
ate cable size. It is very important to operate this inverter correctly.
Be very cautious when working with metal tools on or around batteries. Dropping a tool may cause a
spark or short circuit in batteries or other electrical parts, even causing an explosion.
Please strictly follow the installation procedure when you want to disconnect AC or DC terminals.
Please refer to this manual's "Installation" section for details.
Grounding instructions - this inverter should be connected to a permanent grounded wiring system. Be
sure to comply with local requirements and regulations to install this inverter.
Never cause AC output and DC input to short-circuit. Do not connect to the mains when DC input short
circuits.
ProductDisposal
DO NOT dispose this product with domestic waste!
Electrical devices should be disposed of in accordance with regional directives on electronic and/ or elec-
tronic-waste disposal. In case of further questions, please consult your supplier. In some cases, the supplier
can take care of proper disposal.
WARNING
HIGH LIFE RISK DUE TO FIRE OR ELECTROCUTION.
The Sunsynk Ecco Hybrid Inverter can only be installed by a qualied licensed electrical contractor.
This is not a DIY product.

ECCO SG04LP1 | User Manual6
PRODUCT INTRODUCTION
The Sunsynk Ecco Hybrid Inverter is a multifunctional inverter combines the functions of an inverter, solar
charger and battery charger to oer uninterruptible power support with a portable size. Its comprehensive
LCD display oers user-congurable and easily accessible button operations such as battery charging, AC/
solar charging, and acceptable input voltage based on dierent applications.
ProductOverview
1. Inverter Indicators 7. Function Port 13. Power On/O Button
2. LCD Display 8. Parallel Port 14. PV Input with Two MPPT
3. Function Buttons 9. Generator Input 15. Battery
4. Battery Input Connectors 10. Load 16. Temperature Sensor
5. RS485/CAN Port 11. Grid 17. WiFi Interface
6. Meter Port 12. DC Switch
14
15
16
17
12
13
1
2
5
7
9
10
11
8
3
4
6

ECCO SG04LP1 | User Manual7
ProductSize
Inverter Size

ECCO SG04LP1 | User Manual8
ProductFeatures
INTERACTIVE
Easy and simple to understand display
Supporting Wi-Fi or GSM monitoring
Visual power ow screen
Parallel / multi invert function grid-tied and o-grid
COMPATIBLE
Compatible with main electrical grid voltages or power generators
Compatible with wind turbines
Self-consumption and feed-in to the grid
Auto restart while AC is recovering
Auto earth bond feature (via a relay)
CONFIGURABLE
Fully programmable controller
Programmable supply priority for battery or grid
Programmable multiple operation modes: on-grid/o-grid & UPS
Congurable battery charging - current/voltage based on applications by LCD setting
Congurable AC / solar / generator charger priority by LCD setting
SECURE
Overload/over-temperature/short-circuit protection
Smart battery charger design for optimized battery protection
Limiting function installed to prevent excess power overow to grid
APPLICATIONS
Marine (vessel power management)
Power shedding (home/oce/factory)
UPS (fuel-saving systems)
Remote locations with solar and wind generators
Building sites
Military locations
Telecommunication

ECCO SG04LP1 | User Manual9
BasicSystemArchitecture
The following illustration shows the basic application of this inverter.
It also includes following devices to have a complete running system.
Generator or utility
PV modules
Consult with your system integrator for other possible system architectures depending on your require-
ments.
This inverter can power all kinds of appliances in home or once environment, including motor type applianc-
es such as refrigerator and air conditioner.

ECCO SG04LP1 | User Manual10
TECHNICAL SPECIFICATIONS
Model SYNK-3.6K-SG04LP1 SYNK-5K-SG04LP1
Battery Input Data
Battery Type Lead-acid or Lithium-ion
Battery Voltage Range 40~60V
Max. Charging Current 90A 120A
Max. Discharging Current 90A 120A
Charging Curve 3 Stages/Equalisation
Number of Battery Input Yes
Charging Strategy for Li-Ion
Battery Self-Adaptation to BMS
PV String Input Data
Max. DC Input Power 7000W 6500W
PV Input Voltage 370V (125V~500V)
MPPT Range 150~425V
Start-up Voltage 125V
Full Load DC Voltage Range 300~425V
PV Input Current 13+13A
Max. PV Isc 17+17A
No. of MPPT / Strings Per MPPT 2/1+1
AC Output Data
Rated AC Output and UPS Power 3600W 5000W
Max. AC Output Power 3960W 5500W
Peak Power (o-grid) 2 times of rated power, 10 S
AC Output Rated Current 16.4/15.7A 22.7/21.7A
Max AC Current 18/17.2A 25/23.9A
Max Continuous AC Passthrough 35A 40A
Output Frequency and Voltage 50/60Hz; L/N/PE 220/230Vac (single phase)
Grid Type Single-Phase
Current Harmonic Distortion THD<3%(Linear load<1.5%)
DC Current Injection <0.5% ln
Eciency
Max. Eciency 97.60%
MPPT Eciency 96.50%
Euro Eciency >99.00%
Protection
Integrated
PV Input Lightning Protection, Anti-islanding Protection, PV String Input
Reverse Polarity Protection,Insulation Resistor Detection, Residual Cur-
rent Monitoring Unit, Output Over Current Protection, Surge protection
Certications and Standards
Grid Regulation CEI 0-21, VDE-AR-N 4105, NRS 097, IEC 62116, IEC 61727, G99, G98,
VDE 0126-1-1, RD 1699, C10-11
Safety EMC / Standard IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2

ECCO SG04LP1 | User Manual11
General Data
Operating Temperature Range -45~60°C, >45°C Derating
Cooling Natural Cooling
Noise <30dB
Communication with BMS RS485; CAN
Weight 14.6kg 17.5kg
Size 330W x 433H x 238D mm
Protection Degree IP65
Installation Style Wall-mounted
Warranty 5 years

ECCO SG04LP1 | User Manual12
INSTALLATION
PartsList
Check the equipment before installation. Please make sure nothing is damaged in the package. You should
have received the items in the following package:
Hybrid Inverter
x1
Wall Mounting Bracket
x1
Stainless Steel Anti-Collision
Bolt M8x80
x4
Stainless Steel Mounting
Screws M6x12
x2
Parallel Communication
x1
L-type Hexagon Wrench
x1
User Manual
x1
Data Logger
x1
Battery Temperature Sensor
x1
Sensor Clamp
x1
Battery Magnetic Ring
x1
BMS Magnetic Ring
x1

ECCO SG04LP1 | User Manual13
SelectingtheMountingArea
This Sunsynk Ecco Hybrid Inverter is designed for outdoor use (IP65).
DONOTinstalltheinverterinthefollowingareas:
Areas with high salt content, such as the marine environment. It will deteriorate the metal parts and pos-
sibly lead to water/dampness penetrating the unit.
Areas lled with mineral oil or containing splashed oil or steam such as found in kitchens. It will deterio-
rate plastic parts of the unit, causing those parts to fail or allow water/damp to penetrate the unit.
Areas that generate substances that adversely aect the equipment, such as sulphuric gas, chlorine gas,
acid, or alkali. These can cause the copper pipes and brazed joints to corrode and fail to conduct elec-
tricity reliably.
Areas that can cause combustible gas to leak, which contains suspended carbon-bre or ammable
dust, or volatile inammable such as paint thinner or gasoline.
Areas where there may be gas leaks and where gas may settle around the unit as this is a re risk.
Areas where animals may urinate on the unit or ammonia may be generated.
High altitude areas (over 2000 metres above sea level).
Environments where precipitation or humidity are above 95%.
Areas where the air circulation is too low.
Areas exposed to direct sunlight.
Before connecting all wires, please take o the metal cover by removing screws as shown below:
Considering the following points before selecting where to install:
Please select a vertical wall with load-bearing capacity for installation, suitable for installation on concrete
or other non-ammable surfaces, installation is shown below.
Install this inverter at eye level in order to allow the LCD display to be read at all times.
The ambient temperature is recommended to be between -40~60ºC to ensure optimal operation.
Be sure to keep other objects and surfaces as shown in the diagram to guarantee sucient heat dissipa-
tion and enough space to remove wires.

ECCO SG04LP1 | User Manual14
MountingtheInverter
Choose the recommended drill head (as shown below pic) to drill 4 holes in the wall, 82-90mm deep.
1. Use a proper hammer to t the expansion bolt into the holes.
2. Carry and hold the inverter, ensure the hanger aims at the expansion bolt, and x the inverter on the
wall.
3. Fasten the screw head of the expansion bolt to nish the mounting.
Install the indoor unit on the wall where the oor height is higher than 1600mm.
For proper heat dissipation, allow a clearance of approximately 500mm to the side, 500mm above and
below the unit, and 1000mm to the front of the unit.
WARNING
For proper air circulation to dissipate heat, allow a clearance of approx. 50cm to the side and approx.
50cm above and below the unit. And 100cm to the front.
WARNING
Risk of injury (Heavy Object).
Remember that this inverter is heavy so users must be careful in handling the unit during installation
especially when mounting or removing it from a wall.

ECCO SG04LP1 | User Manual15
Inverter Hanging Plate Installation
BatteryConnection
For safe operation and compliance, a separate DC over-current protector or disconnect device is required
between the battery and the inverter. In some applications, switching devices may not be required but
over-current protectors are still required. Refer to the typical amperage in the table below for the required
fuse or circuit breaker size.
Model Wire Size Cable (mm2) Torque Value (max.)
3.6/5kW 2AWG 25 5.2N.m

ECCO SG04LP1 | User Manual16
Please follow below steps to implement battery connection:
1. Please choose a suitable battery cable with correct connector which can well t into the battery termi-
nals.
2. Use a suitable screwdriver to unscrew the bolts and t the battery connectors in, then fasten the bolt by
the screwdriver, make sure the bolts are lightened with torque of 5.2 N.M in clockwise direction.
3. Make sure polarity at both the battery and inverter is correctly connected.
4. In case of children touch or insects go into the inverter, please make sure the inverter connector is fas-
ten to waterproof position by twist it clockwise.
WARNING
Reverse Polarity.
Before making the nal DC connection or closing DC breaker/disconnect, be sure positive(+) must be
connect to positive(+) and negative(-) must be connected to negative(-). Reverse polarity connection
on battery will damage the inverter.
WARNING
All wiring/connecting must be performed by qualied personnel. Ensure the inverter unit is wired
correctly before making the nal DC connection or closing the DC Breaker/disconnection device. A
reverse-polarity connection on the battery will damage the inverter.
For 3.6kW/5kW model, battery connector
screw size: M6
Pass the battery power cable
through the magnetic ring and
wrap it around the magnetic
ring two times.
Pass the BMS communication cable
through the magnetic ring and wrap
it around the magnetic ring four times.
24mm
8.4mm
DC Battery Input

ECCO SG04LP1 | User Manual17
FunctionPortDenition
ON
1 2
DIP Switch
RS485/CAN: CAN port for battery
communication.
Meter: for energymeter communication.
Parallel 1: Parallel communication port 1
(CAN interface).
Parallel 2: Parallel communication port 2
(CAN interface).
Inverter
TEMP(1,2): Battery temperature sensor for
lead acid battery.
CT(3,4): Current transformer for "zero export
to CT" mode.
G-start/G-valve(5,6/7,8): Dry contact signal for startup the diesel generator.
When the "GEN signal"is active, the open contact(GV/GS) will switch on (no voltage output). If the
“Signal ISLAND MODE” is ticked, the GS port will be the dry contact signal for startup the diesel
generator. If "Signal ISLAND MODE" is not ticked, the GV port will be the dry contact signal
for startup the diesel generator.
DIP switch: Parallel communication resistor
If the number of inverters in the parallel system
is less than or equal to 6, all inverter’s DIP
switch (1&2) need be ON position.
If the number of inverters in parallel system
exceeds 6, the main 6pcs inverter’s DIP switch
needs to be ON position. And the other
inverter DIP switch (1&2) needs to be OFF position.
GV/GS
(diesel generator startup signal)
relay
coil
open
contact
GV/S
Batt Temp
Sensor
CT Coil
Gen start-up
N/O Relay
12345678
L
TEMP:1,2
CT:3,4
G-start:5,6
G-valve:7,8
N
RS485/CAN
parallel_1parallel_2
Meter

ECCO SG04LP1 | User Manual18
ConnectingaLithiumBattery
When connecting a Lithium battery, follow the connection steps below and check ‘Setting up a Lithium Bat-
tery’ to connect with an inverter.
1. Connect the correct diameter of cable in accordance with the battery manufacture specications along
with recommended safety devices.
2. Connect a communication cable from the batteries to the inverter in compliance with the battery manu-
facturer guidelines. The cables have two ends, one to be specically connected to the BMS and another
to be connected to the inverter, do not connect them incorrectly.
3. Connect the power and communication cables to the inverter correctly.
NOTE:
When connecting more than one battery, ensure they are set in the conguration of ‘master and
slave’.
Depending on the battery type, the inverter should be capable of controlling the batteries BMS.
Therefore, you need to set the protocol of the BMS on both the battery and the inverter.
When using more than one battery, the rst battery will be the master, and the other batteries will
be the slaves. Please, check the battery manufacturer's specications for proper operation.
To verify if the battery is communicating, access the Li BMS menu as detailed in the section ‘Setting
Up a Lithium Battery’ and check whether the values are realistic. It is important that the charge and
discharge limits in that page match the numbers expected for the number of batteries physically
connected.

ECCO SG04LP1 | User Manual19
Lead-AcidBatteryTemperatureSensor
Without a remote temperature sensor, lead-acid batteries may undercharge or overcharge depending on
the ambient temperature of the installation environment. This may result in a re hazard.
Temp. sensor
Inverter
1 2

ECCO SG04LP1 | User Manual20
ConnectingtheAC
Before connecting to grid, please install a separate AC breaker between inverter and grid. Also, it is recom-
mended that installs an AC breaker between backup load and inverter. This will ensure the inverter can be
securely disconnected during maintenance and fully protected from over current. For the 3.6/5kW model,
the recommended AC breaker for backup load is 40A. For the 3.6/5kW model, the recommended AC breaker
for grid is 40A.
There are three terminal blocks with “Grid”, “Load”and “GEN” markings. Please do not misconnect input and
output connectors.
GEN/AUX Generator connection.
GRID This works like a conventional grid-tied inverter. It is both an input and output connec-
tion for non-essential load and supply.
LOAD Connection of essential loads such as lighting, security systems, and internet.
WARNING
All wiring and cable sizes must comply with your particular country’s wiring regulations and codes of
Practices. Ensure that suitable disconnection devices and RCDs are tted.
Please follow the steps below to implement GRID, LOAD, and GEN port connections:
1. Before making GRID, LOAD, and GEN port connections, make sure to turn o the AC breaker or discon-
nector rst.
2. Remove a 10mm sleeve from each wire, unscrew the bolts, insert the wires according to the polarities
indicated on the terminal block and tighten the terminal screws. Ensure the connection is complete.
3. Then, insert AC output wires according to the polarities indicated on the terminal block and tighten the
terminal. Make sure to connect corresponding N wires and PE wires to related terminals as well.
4. Ensure the wires are securely connected.
5. Check that the AC power source is isolated before attempting to connect it to the inverter. Insert AC out-
put wires according to the polarities indicated on the terminal block and tighten the terminal screws. Be
sure to connect the corresponding N wires and PE wires to the correct terminals and ensure the wires
are securely connected.
Model Wire Size Cable (mm2) Torque Value (max.)
3.6kW 10AWG 6 1.2N.m
5kW 10AWG 6 1.2N.m