File Info : application/pdf, 37 Pages, 5.89MB

STH 3~8KTL-HS User Manual EN

EN
User Manual
Hybrid Inverter
STH 3~8KTL-HS
S U N W A Y S T E C H N O L O G I E S C O . , LT D .

CONTENTS

1. Preface5
1.1 Overview5 1.2 Target Groups5
2. Safety Instructions6
2.1 Safety Notes6 2.2 Statement6 2.3 Important Safety Matters7 2.4 Symbols Explanation8
3. Product Introduction 11
3.1 Basic Features11 3.2 Appearance Introduction16 3.3 Display Interface18 3.4 Packing List19
4. Product Installation 22
4.1 Selection of Installation Location22 4.2 Mounting the Inverter (standard bracket)24 4.3 Mounting the Inverter (Including L-shaped plate)26 4.4 Electrical Connection29 4.5 Communication Connection46 4.6 Monitoring Device Installation52
5. Start and Stop 53
5.1 Start Inverter53 5.2 Stop Inverter53
6. General Operation 54
6.1 Display Operation54 6.2 Auto-Test58 6.3 Online Monitoring APP59
7. Troubleshooting 60
7.1 Fault Messages60 7.2 Maintenance63
8. Technical Parameters 64

Attention
Attention
The products, services or features you purchase are subject to the commercial contracts and terms of Ningbo Sunways technologies Co., Ltd. All or part of the products, services or features described in this document may not be within your purchasing or using scope. Unless otherwise agreed in the contract, the Company shall not make any express or implied declaration or guarantee of the contents of this document. Due to product version upgrades or other reasons, the contents of this document will be updated periodically. Unless otherwise agreed, this document serves only as a guide to use, and all statements, information and recommendations in this document do not constitute any express or implied guarantee.

1 Preface
1 Preface
1.1 Overview This manual is an integral part of Sunways STH 3-8kW series single-phase high-voltage hybrid inverters (hereinafter referred to as the hybrid inverters). It mainly introduces the assembly, installation, electrical connection, debugging, maintenance and troubleshooting of the products. Before installing and using hybrid inverters, please read this manual carefully, understand the safety information and be familiar with the functions and characteristics of hybrid inverters.
1.2 Target Groups This manual is applicable to the electrical installers with professional qualifications and the people who bought it. If there are any problems in the installation process, please call Sunways service telephone at +86 400-9922-958 or email Sunways at service@sunways-tech.com for consultation.

2 Safety Instructions
2 Safety Instructions
2.1 Safety Notes Before installation, you should read this manual carefully and follow the instructions in this manual strictly. Installation operators need to undergo professional training or obtain electrical related professional qualification certificates. During the installation, do not touch any parts of the inner part of the inverter except the terminals. All electrical installations must conform to local electrical safety standards. If the inverter needs maintenance, please contact the local designated personnel for system installation and maintenance. To use this grid-connected inverter for power generation needs the permission of the local power supply authority. During the operation of the inverter, the surface temperature may be higher and there is a risk of burns. Do not touch. When installing photovoltaic panels in the daytime, the photovoltaic panels should be covered with opaque materials to avoid the risks and danger of high voltage at the panel end in sunlight. When wiring the lithium battery terminals, please disconnect the breaker or switch of the lithium battery in case of a physical injury caused by the high-voltage.
2.2 Statement Sunways Technologies Co.,Ltd. has the right not to undertake quality assurance in any of the following circumstances: Damages caused by irregular transportation. Damages caused by incorrect storage, installation or use. Damages caused by installation and use of equipment by non-professionals or untrained personnel.
6

2 Safety Instructions
Damages caused by failure to comply with the instructions and safety warnings in the products and documents. Damages caused by running in an environment that doesn't meet the requirements which stated in the documents. Damages caused by operation beyond the parameters specified in applicable technical specifications. Damages caused by unauthorized disassembly, alteration of products or modification of software codes. Damages caused by abnormal natural environment (force majeure, such as lightning, earthquake, fire, storm, etc.). Any damages caused by the installation or operation conditions beyond the stipulated national standard corresponding to the country where the inverter installed. Products beyond the warranty period.
2.3 Important Safety Matters The following symbols may appear in this manual, which represent the following meanings:

Danger

Used to warn of urgent dangerous situations, if not avoided, it could result in death or serious personal injury.

Warning

Used to warn of potentially dangerous situations, if not avoided, it may result in death or serious personal injury.

Caution

Used to warn of potentially dangerous situations, if not avoided, it may result in moderate or minor personal injury.

2 Safety Instructions

Attention

Used to transmit the safety warning information about equipment or environment, if not avoided, it may cause equipment damage, data loss, equipment performance degradation or other unpredictable results. "Attention" does not involve personal injury.

Note

Used to highlight important information, best practices and tips, etc. it's not warning, doesn't involve personal injury and equipment damage information.

2.4 Symbols Explanation This chapter mainly elaborates the symbols displayed on the hybrid inverter, nameplate and packing box.
2.4.1 Symbol on the Hybrid Inverter

Power indicator.

Grid status indicator.

Inverter status indicator.

Battery level indicator.

2 Safety Instructions
Grounding symbol, the inverter casing needs to be properly grounded.
2.4.2 Symbol on the Inverter nameplate
The inverter cannot be disposed of with household waste. Please read the instructions carefully before installation. Do not touch any internal parts of the inverter until 5 min after being disconnected from the mains and PV input. CE mark, the inverter complies with the requirements of the applicable CE guidelines. TUV certification. Danger. Risk of electric shock!
9

2 Safety Instructions

Symbol

Description
The surface is hot during operation and no touch is allowed.
Electric shock hazard, it is strictly forbidden to use the person to disassemble the inverter casing.

2.4.3 Symbol on the Packing box

Symbol

Handle with care.

This side up.

Keep dry.

Stacked layers.

Description

3 Product Introduction
3 Product Introduction
3.1 Basic Features 3.1.1 Function
Sunways STH series is also known as hybrid inverter or storage inverter, which is mainly used to combine the PV array, lithium battery, loads and power grid to realize intelligent power management and dispatching .
3.1.2 Models The STH 3~8kW series hybrid inverter contains 10 models which are listed below: STH-3KTL-HSSSTH-3.6KTL-HSSSTH-3KTL-HSSTH-3.6KTL-HSSTH-4.2KTL-HSSTH-4.6KTL-HS STH-5KTL-HSSTH-6KTL-HSSTH-7KTL-HSSTH-8KTL-HS.
3.1.3 Applicable grid type The applicable grid types of the Sunways STH 3~8kW series are TN-S, TN-C, TN-C-S and TT. When applied to the TT grid, the voltage of N to PE should be less than 30V. See Figure 3-1 for details:

TN-S
L N PE
STS Single Phase

TN-C
L PEN
STS Single Phase

TN-C-S
L N PE
STS Single Phase

TT
L N PE STS Single Phase

Figure 3-1 Applicable grid types

3 Product Introduction

3.1.4 Schematic Diagram of Hybrid System
The hybrid solar system is usually composed of the PV array, hybrid inverter, lithium battery, loads and power grid. As shown in the Figure 3-2:

PV Array

STH 3-8KTL-HS

Back-up Loads CT

Single Phase Storage Inverter

High-voltage Lithium Battery

On-grid Loads

Meter

Grid

DC AC RS485

Figure 3- 2 Schematic diagram of hybrid system

3.1.5 Operation Modes
Sunways STH Hybrid inverter has the following basic operation modes and you can configure the operation mode as per your preference in the App.

Mode 1 In this working mode, when the power from the PV array is sufficient, PV power will supply the loads, battery, and grid by the following sequence: Loads Battery Grid. PV power will supply the loads first, and second charge the battery, and then feed to the grid. (You can set the power to the grid to 0W if the local grid doesn't allow).

PV Battery

Inverter

Loads Grid

3 Product Introduction

When the PV power is insufficient, the battery

will discharge to supply loads, and the grid will

join in if the battery is not enough to supply

loads.

Loads

Inverter

Battery

Grid

Mode 2 Screen Setting step: General Settings WorkMode Set General Mode Advanced Settings Peakload Shifting ON Advanced Settings SetMaxGrid XXX (kVA) APP Setting step: General Mode To Set Peakload Shifting ON Set Max Grid (kVA)

PV Battery

Inverter

Loads Grid

In this working mode, set the Pmax from grid in the App can realize the "Peakload Shifting".

When the loads consumption more than the

Pmax, the power exceeded Pmax (cannot be

higher than the inverter max output power)

will be supplied by the inverter. Inverter will

use power from PV array to supply loads first

and battery second if it isn't enough.

Battery

Inverter Pload Pmax

Loads Grid

3 Product Introduction

* To realize the "Peakload Shifting" function, the load power that exceeded Pmax has to be within the inverter max output power, otherwise, the inverter will only output the max power which allowed.

Mode 3 In this working mode, the inverter will use the power from PV or grid (Set in the App) to charge the battery until it is fully charged, and as long as the grid is there, the battery won t discharge. When the grid is cut off, power from PV and battery will supply loads connected in the back-up side (UPS).

PV Battery

Loads

Inverter

× Grid

Mode 4

In this working mode, you can set charge/

discharge power and time in the App, invert-

er will use the power from PV or grid(whether

to use can be set in the App) to charge the

battery in the predetermined period.

Battery

Inverter will use power from PV and battery

to supply loads in the predetermined period

and the insufficient part will be supplied by

the grid.

Battery
14

Inverter Inverter

Loads
Grid Loads
Grid

3 Product Introduction

Mode 5

In the purely off-grid mode, power from PV

will supply the back-up loads first and then

charge the battery if there's surplus.

Loads

Battery

When the power from PV isn't enough, the

battery will discharge to supply back-up

loads together with PV.

Inverter

No Grid Loads

Battery

Inverter

No Grid

3.1.6 SSttoorraaggeeccoonnddititioionnss Inverter must be stored in its original packaging. The storage temperature should be in the range of -30 ° C and + 60 ° C, and the relative humidity stored should be less than 90%. If a batch of inverters needs to be stored, the height of each pile should be no more than 6 levels.

410mm

3 Product Introduction

3.2 Appearance Introduction 3.2.1 Inverter front view

550mm

Logo Display

3.2.2 Inverter side view

Figure 3- 3 Front view

175mm

410mm

Name Plate

Figure 3- 4 Side view 16

175mm

3 Product Introduction

3.2.3 Inverter bottom view
Battery Input Terminal

Com2 Port

DC Switch (Optional)

Back Rail

Back-up Output Terminal

DC Input Terminal

Com1 Port

On-grid Output Terminal

Figure 3-5 Bottom view

3.2.4 Inverter back view

Back Rail

Vent Valve
Figure 3-6 Inverter back view 17

3 Product Introduction

3.3 Display Interface
2 3 6

No.

2 4
3

Figure 3-7 Display interface

Definition Battery Level Indicator
Power Indicator Grid Indicator Alarm Indicator
Display Button

Item Indicator

Status

Description

Off

Battery not connected or communication fault.

Battery

Level

Indicator

Always on

Battery is discharging or waiting, indicator shows battery level.

Single indicator flash Battery is charging, indicator shows battery level.

Off

Inverter no AC output.

Power 2
Indicator

Quick flashing Slow flashing

Inverter entered self-test status. Inverter entered waiting status.

Always on

Inverter works normal.

Grid 3
Indicator

Off Slow flashing
Always on

Disconnected with grid. Inverter detected grid but not running in on-grid mode. Inverter works in on-grid mode.

3 Product Introduction

Item Indicator Alarm
4 Indicator

Display

Button

Status Off
Slow flashing Quick flashing
Orange Red On Off
Physical button

Description
The inverter is running normally.
The monitoring device is not connected to the router or is not connected to the base station. The monitoring device is connected to the router or connected to the base station but not connected to the server. A Warning is detected but inverter still working, view the fault info on the display. An alarm or fault is detected, view the fault info on the display.
Display the inverter operation information.
Display off to save power, press the button to wake up the display. Switch display information and set parameters by short press or long press.

3.4 Packing List The package of the inverter includes the following accessories. Please check whether the accessories in the packing box are complete at the first time when receiving the goods. See Figure 3-8 for the packing list:

Inverter×1

Wall Bracket×1

3 Product Introduction Expansion Bolt

PV Terminal

Expansion Bolt× 5
AC Cover

PV Terminal× 2
Sunways Meter

AC Cover× 1 , Screw× 6
PE Terminal

Sunways Meter with 3 CTs ×1 Cord End Terminal × 4
Battery Plug

PE Terminal× 1
20

Battery Plug× 1

Back-Up Terminal

3 Product Introduction On-Grid Terminal

Back Up AC Terminal×1 Cord End Terminal×6
Monitoring Device (Optional)

On Grid AC Terminal×1 Cord End Terminal×6
L-shaped Plate(Optional)

Monitoring Device × 1(Optional)
User Guide

User Manual

Quick Guide
Inspection Report

L-shaped Plate×1Screw× 3

Figure 3- 8 Packing list 21

4 Product Installation
4 Product Installation
4.1 Selection of Installation Location The Sunways STH 3~8kW series is designed with IP65 protection for indoor and outdoor installations. When selecting an inverter installation location, the following factors should be considered: The wall on which the inverter is mounted must be strong and can withstand the weight of the inverter for a long time. The inverter needs to be installed in a well-ventilated environment. Do not expose the inverter directly to strong sunlight to prevent the power derating due to excessive temperature. The inverter should be installed in a place with shelter to prevent direct exposure to sunlight and rain. Install the inverter at the eye level for easy inspection of screen data and further maintenance. The ambient temperature of the inverter installation location should be between -30 ° C and 60 ° C. The surface temperature of the inverter may reach up to 75 ° C. To avoid risk of burns, do not touch the inverter while it s operating and inverter must be installed out of reaching of children.
4.1.1 Recommended installation location of the inverter, as shown in Figure 4-1:

4 Product Installation

Warning

Do not put flammable and explosive articles around the inverter.

4.1.2 The requirements for inverter installation spacing are shown in Figure 4-2:

500mm

300mm

500mm

Figure 4-2 Recommended installation space 4.1.3 The installation angle of the inverter is recommended as shown in Figure 4-3:

Figure 4-1 Recommended installation 22

Figure 4-3 Recommended installation angle 23

4 Product Installation
4.2 Mounting the Inverter (Standard bracket) 4.2.1 Wall bracket installation Dimensions of wall bracket, see Figure 4-4:
300mm

150mm

150mm Figure 4-4 Dimensions of wall bracket
Use the wall bracket as the template to mark the position of 5 holes on the wall. See Figure 4-5 for details:

4 Product Installation

Warning

Before drilling, make sure to avoid the buried water tube and electric wires in the wall to avoid danger.

Insert the expansion tubes into the holes and tighten them, then fix the bracket onto the wall with expansion screws by using a cross screwdriver, as shown in Figure 4-6:

Figure 4-6 Fix the wall bracket
4.2.2 Mounting the inverter Lift up the inverter with both hands, hang the back rail on the fixed wall bracket carefully, see Figure 4-7 for details:

Figure 4-5 Mark the hole position
Use an electrical driller with 10mm diameter bit to drill 5 holes on the wall and make sure hole depth is 80mm. 24

Figure 4-7 Mounting the inverter 25

4 Product Installation 4.3 Mounting the Inverter Including L-shaped plate
4.3.1 Wall bracket installation Dimensions of wall bracket, see Figure 4-8:
300mm

150mm

150mm
Figure 4-8 Dimensions of wall bracket Use the wall bracket as the template to mark the position of 5 holes on the wall. See Figure 4-9 for details:

4 Product Installation
Bracket assembly Prepare the two M5 screws and L-shaped plate in the accessory bag, then fix the L-shaped plate to the mounting bracket.

Figure 4-10 Bracket assembly Use an electrical driller with 10mm diameter bit to drill 5 holes in the wall with 80mm depth.

Warning

Before drilling, make sure to avoid any buried water tube and electric wires in the wall.

Insert the expansion tubes into the holes and tighten them, then fix the bracket onto the wall with expansion screws by using a cross screwdriver, as shown in Figure 4-11:

Figure 4-9 Marking hole position using installation bracket 26

Figure 4-11 Fixing the wall bracket 27

4 Product Installation 4.3.2 Mounting the inverter Lift the inverter, hang the back rail on the fixed wall bracket carefully. Screws the inverter to the L-shaped plate (The lock is purchased separately). See Figure 4-12 for details:
Figure 4-12 Mounting the inverter

4.4 Electrical Connection

4 Product Installation

Danger

A high voltage in the conductive part of the inverter may cause an electric shock. When performing any installation on the inverter, make sure that the AC and DC sides of the inverter are completely de-energized.

Warning

Do not ground the positive or negative pole of the PV string, otherwise it will cause serious damage to the inverter.

Warning

Static may cause damage to the electronic components of the inverter. Anti-static measures should be taken during the repairing or installation.

Attention

Do not use other brands or other types of PV terminals other than the PV terminal in the accessory package. Sunways has the right to refuse all damages caused by the mixeduse of terminals.

Attention

Moisture and dust can damage the inverter, ensure the cable gland is securely tightened during installation. The warranty claim will be invalided if the inverter damaged by the cable connector not well installed.

4.4.1 Sunways STH hybrid inverter electrical wiring diagram
This diagram shows Sunways STH 3~8kW series hybrid inverter wiring structure and composition, concerning the real project, the installation and wiring have to be in line with the local standards.

4 Product Installation

PV Strings

Battery

Loads

To Battery AC Breaker

AC Breaker

AC Breaker To Sunways Meter

Sunways Meter

Power Meter

Acrel ACR10R
FN Set

R_P

AC Breaker Loads

Figure 4-8 Figure 4-13 Standard wiring diagram
30

Acrel ACR10R
Run FN Set R_P

L Grid

Run

Grid
Normal Loads
Back-up Loads

Switch/Breaker RCD
Breaker RCD

L
BACK-UP N

RJ45-BMS Communication

B-

grounding hole

The additional

B+

E-BAR

STH Hybrid Inverter

N-BAR

PV Array
PV Array
Battery

RJ45-Meter L
ON-GRID N

PV1+ PV1-
PV2+ PV2-

4 Product Installation Single inverter wiring diagram This diagram is an example without special requirement on electrical wiring connection. Neutral line of AC supply can be isolated or switched.
1(L) 2 3 4(N) 5(L-S1) 6(L-S2) 7 8 9 10
Figure 4-14 Standard wiring diagram 31

Main Switch/Breaker

Sunways CT

Breaker

Sunways Meter RS485-2

Communication

L BACK-UP
N

RJ45-BMS Communication

Breaker

B-

grounding hole

The additional

B+

E-BAR

STH Hybrid Inverter

N-BAR

PV Array
PV Array
Battery

RJ45-Meter L
ON-GRID
N

PV1+ PV1-
PV2+ PV2-

4 Product Installation This diagram is an example for Australia and New Zealand. Neutral line of AC supply must not be isolated or switched.
1(L) 2 3 4(N) 5(L-S1) 6(L-S2) 7 8 9 10

Sunways CT

Breaker

Sunways Meter RS485-2

Communication

4 Product Installation
4.4.2 External ground connection Connect the inverter and ground bar through PE wire to achieve the purpose of grounding protection. Please always remember wiring the PE wire before wiring other wires.

Danger Attention

Do not connect the N-wire as a protective ground wire to the inverter casing. Otherwise, it may cause electric shock.
Good grounding is good for resisting surge voltage shock and improving EMI performance. Inverters must be well-grounded. For a system with only one inverter, just ground the PE cable. For a multi-inverter system, all inverters PE wire need to be connected to the same grounding copper bar to ensure equipotential bonding.

Ground terminal connection steps: The external grounding terminal is located in the lower right side of the inverter. Fix the grounding terminal to the PE wire with a proper tool and lock the grounding terminal to the grounding hole in the lower right side of the inverter. As shown in Figure 4-16:

Switch/Breaker RCD

Main Switch/Breaker

RCD

Grid
Normal Loads
Back-up Loads

Figure 4-15 Australia wiring diagram 32

Figure 4-16 Grounding terminal connection 33

4 Product Installation

4.4.3 Inverter PV string connection
1. The following principles must be considered when making electrical connections to the inverter: Disconnect the AC breaker on the grid side. The DC switch of the inverter must be turned to the "OFF" position. The number and type of the PV panels connected in the two strings of one MPPT must be same. Make sure the maximum output voltage of each PV string does not exceed 1000V.

2. DC connector assembly procedures Select the appropriate photovoltaic cable:

Cable type General photovoltaic cable

Conductor cross-sectional area (mm²)

Scope (mm²)

Recommended value (mm²)

2.5-4.0

4.0

Peel off the DC cable insulation sleeve for 7 mm, as shown in Figure 4-17:

Wire cross-sectional area 2.5-4mm2

7mm

Figure 4-17 34

4 Product Installation Disassemble the connector in the accessory bag, as shown in Figure 4-18:
+ -
Figure 4-18 Insert the DC cable through the DC connector nut into the metal terminal and press the terminal with a professional crimping plier (pull back the cable with some power to check if it s tight enough), as shown in Figure 4-19:
Crimping Plier
Figure 4-19 Insert the positive and negative cables into the corresponding positive and negative connectors, pull back the cable to ensure that the terminal is tightly attached in the connector. Use an open-end wrench to screw the nut to the end to ensure that the terminal is well sealed, as shown in Figure 4-20:
35

4 Product Installation Open-end Wrench

Figure 4-20

Warning

Before assembling the DC connector, make sure that the cable polarity is correct.
Use a multimeter to measure the voltage of the DC input string, verify the polarity of the DC input cable, and ensure that each string voltage is within 1000V.

Insert the positive and negative connectors into the inverter DC input terminals respectively, and a "click" sound represents the assembly in place, as shown in Figure 4 -21:

4 Product Installation

4.4.4 Inverter battery connection
1. The following principles must be considered when making battery connection: Disconnect the AC breaker on the grid side. Disconnect the breaker on the battery side. Turn the inverter DC switch to the "OFF" position. Make sure the maximum input voltage of battery is within the inverter limitation (135~750V).

2. Lithium battery connector assembly procedures Select an appropriate DC cable.

Cable type AWG 10

Conductor cross-sectional area (mm²)

Outside diameter (mm²)

Conductor core section (mm²)

5.5-8.0

4.0-6.0

Peel off the DC cable insulation sleeve for 7 mm, as shown in Figure 4-22:

Wire cross-sectional area 5.5-8.0mm2 15mm

Figure 4-21 36

Figure 4-22 Use a flathead screwdriver to open the clamping bracket in the connector, as shown in Figure 4-23:
37

4 Product Installation
Figure 4-23 Insert the stripped DC cable to the battery connector deep enough and toggle the clamping bracket to make sure it tightly locked with the stripped cable, as shown in Figure 4-24:

4 Product Installation

Warning

Before making the battery connector, please make sure the polarity of the cable is correct.
Use a multimeter to measure the voltage of the battery pack and make sure the voltage is within the inverter limitation and the polarity is correct.

Insert the positive and negative connector into the inverter battery terminals respectively, and a "click" sound represents the assembly in place, as shown in Figure 4-26:

Figure 4-24 Push the battery connector to the thread joint, and use an open wrench to lock the connector in a torsion of 2Nm tightly, as shown in Figure 4-25:
Figure 4-25 38

Figure 4-26
4.4.5 AC output connector connection 1.The following principles must be considered when making AC output connection: An independent AC breaker is required in both on-grid and back-up output side, and any loads cannot be connected with inverter directly. Before making the connection of AC cable, please confirm all DC & AC power source are disconnected from the inverter. The Sunways STH 3~8kW series single-phase high voltage hybrid inverter applies to the single-phase power grid with a voltage of 230V and a frequency of 50/60Hz.
39

4 Product Installation

2. AC connector assembly procedures The recommended AC cable and AC breaker for Sunways STH 3~8kW series single-phase hybrid inverter are as shown in the following table:

Model
STH-3KTL-HSS STH-3.6KTL-HSS
STH-3KTL-HS STH-3.6KTL-HS STH-4.2KTL-HS STH-4.6KTL-HS STH-5KTL-HS STH-6KTL-HS STH-7KTL-HS STH-8KTL-HS

Outside diameter (mm)
12-18 12-18 12-18 12-18 12-18 12-18 12-18 12-18 12-18 12-18

Conductor core section (mm²) 4-10 4-10 4-10 4-10 4-10 4-10 6-10 6-10 6-10 6-10

Breaker (A)
20 25 20 25 25 25 30 40 50 50

According to the table above, select an appropriate AC cable, peel off the insulation sleeve of AC cable for 40~60mm, and peel off the sleeve in the conductor core of L/PE/N wires for 8mm, as shown in Figure 4-27:

Wire Diameter:12-18mm

Str i p Length:8mm 40-60mm

Figure 4-27 40

4 Product Installation
Insert the stripped AC cables through the AC connector cover in the sequence as shown in Figure 4-28:

ON-GRID BACK-UP

Cables

Screw cap The insulator AC sheet

Single hole

cover

seal ring

Figure 4-28 Put the cord end terminals on the stripped conductors one by one and press with some pressure to make it tightly locked with the conductors, as shown in Figure 4-29:

Figure 4-29

Caution

The cord end terminals must be locked tightly, and make sure it won't be loose after a long period of use.

4 Product Installation
Lock the well-pressed cord end terminals into the AC connector in the accessory bag and make sure the cables sequence is in line with the mark on the connector, as shown in Figure 4-30:

4 Product Installation Lock the AC connector cover to the inverter with screws, as shown in Figure 4-32:

Figure 4-30 Insert the assembled AC connector to the corresponding AC port in the inverter, as shown in Figure 4-31:
ON-GRID

Figure 4-32
Screw up the rubber ring and anti-water cap to make sure the AC connector is well sealed, as shown in Figure 4-33:

Figure 4-31

Caution

Please distinguish the on-grid and back-up port, and don't mix up the on-grid port and back-up port when making the connection.

Figure 4-33
4.4.6 Meter and CT connection The current transformer, also called CT, is usually installed on the fire wires between the house loads and the power grid, as shown in Figure 4-34. The Meter can install in the AC combiner box or other places that are unable to be touched by children. Sunways CT integrated a cable with length of 2m and could be extended to 5m at max.
43

4 Product Installation

N-BAR

Sunways CT

Main Switch/Breaker

CT Grid

Switch/Breaker

House Grid

RCD

Normal

Figure 4-34 CT conneLcotiaodnsdiagram

Attention

CT installation direction and phase sequence should strictly follow the instruction in the user manual, otherwise, the inverter may not be working normally.

Attention

The CT has to be corresponding with the port in the meter, and the connection between CT and Meter needs to be reliable, otherwise, the CT measurement accuracy may be affected.

The rated current of CT in the inverter accessory box is 80A, and the maximum allowed

inserted cable diameter is 16mm. If the max current through the CT exceeds the rated

current or the cable diameter is wider than 16mm, please contact Sunways for help.

Note

The CTs have been connected to the Sunways Meter when you received them, and you just need to follow the wiring diagram in the Meter to connect CT, as shown in Figure 4-35.
AC Breaker

AC Breaker

To Sunways Meter

Sunways Meter

Power Meter

Acrel ACR10R

R_P FN Set

Run

AC Breaker

Figure 4-35 Meter wiring diagram 44

4 Product Installation Meter terminals definition as shown in table 4-36:

No.

Definition

NULL

4 3 21

L-S1

L-S2

7 RS485-2
8 5 678910
9

NULL NULL NULL

NULL

RS485-2

RS485

Function L/N connect to grid to detect
power grid voltage
Connect CT to detect current
Communicate with inverter

Figure 4-36 Meter terminals definition Please refer to chapter 4.4.2 for the communication between Meter and inverter.

4 Product Installation
4.5 Communication Connection 4.5.1 Communication wiring illustration
All communication ports are hidden behind the communication terminal at the bottom of inverter which including Meter port, CAN port, BMS port, EMS port, RLYOUT port, DRED port, as shown in Figure 4-374-38.

Cables

135 246

Screw cap The insulator Single hole seal ring Com sheet cover

Screw

Figure 4-37

4 Product Installation

Inverter communication interface and definition as shown in table 4-39:

Type

Definition

METER

Communicate with Meter

BMS

Communicate with BMS

PARCAN EMS RLYOUT

DRED PARCAN

For Australia use/One key to shut off Parallel CAN communication bus interface

EMS

EMS power dispatching interface

RLYOUT

Dry contact output, a group of normally open contact passive dry contact

Figure 4-39 Meter terminals definition

Dismantle the cover of the communication ports with a screwdriver, and put all communication cables through the holes and follow the illustration below to make the connection of each communication cables, and when all cables have connected, put back the cover and screw up the anti-water cap of the holes, as shown in Figure 4-40:

Figure 4-38 46

Figure 4-40 47

4 Product Installation
4.5.2 Communication between inverter and meter The communication between meter and inverter is an RJ45 interface cable. A 10M length meter communication cable is already attached to the inverter when you received it and this cable could be extended up to 100M. Insert the RJ45 heads into the meter RS485-2 port which as shown in Figure 4-41.
METER

RS485-2 5 6789 10

Figure 4-41

RJ45 terminal connection sequence and definition as shown in table 4-42.

1 785634 2

No.

Color

Orange&White

Orange

Green&White

Blue

Blue&White

Green

Brown&White

Brown

Meter Side / /
RS485_B / /
RS485_A RS485_B RS485_A

Figure 4-42 RJ45 terminal connection sequence and definition

Battery Side RS485_A RS485_B / CAN_H CAN_L / / /

4 Product Installation

4.5.3 Communication between inverter and battery
The communication between meter and inverter is an RJ45 interface cable. A 3M length battery communication cable is already attached to the inverter when you received it, and you just need to insert it to the BMS interface of the inverter and battery.

Note

Before purchasing the battery, you have to make sure the battery you selected is in the battery approval list of Sunways, otherwise, the system may not work properly. Please contact your installer or Sunways service team for confirmation if you're not sure about it.

4.5.4 Multiple inverters parallel connection/EMS/Relay output dry contact
Multiple inverters parallel connection, EMS and relay output dry contact use the 6pin terminal on the right side, and you can use the matching 6pin terminal in the accessory box to make the connection, as shown in Figure 4-43.

1 2 3 4 5 6

Figure 4-43 Parallel connection/EMS/relay output dry contact terminal

Terminal definition

No. Definition

CAN PAR

CAN_H

CAN_L

EMS

RLY OUT

RS485_B

RS485_A

RLY_COM

RLY_NO

4 Product Installation
An EMS communication cable needs to be connected when to control the operation of a hybrid inverter through the EMS, and communication between EMS and inverter is RS485.

Inverter RS485_B RS485_A

EMS

RS485_B RS485_A

Figure 4-44 EMS communication wiring diagram
Sunways STH 3~8kW series hybrid inverter integrated a set of relay output dry contacts with the contact capacity 230Vac/1A or 30Vdc/1A that are very useful in some special circumstances, such as in the purely off-grid system, it can be used to trigger the backup generator. Please contact your installer or Sunways service team to learn more detailed operation steps.
4.5.5 DRED Connection DRED interface is special reserved for Australia and New Zealand according to their safety regulation, and Sunways doesn't provide the DRED device for the customer. DRED connection uses the 6pin terminal on the left side, and you can use the matching 6pin terminal in the accessory box to make the connection, as shown in Figure 4-45.
50

4 Product Installation

1 2 3 4 5 6

Figure 4-45 DRED terminal

DRED terminal definition

No.

Definition COM/DRMO

REFGEN

3 DRM4/8

4 DRM3/7

5 DRM2/6

6 DRM1/5

4.5.6 One key to shut off
Sunways STH 3~8kW hybrid inverter comes standard with one key to shut off function, and you can use this function by connecting an external switch into the DRED interface if it requires in the installation place. The external switch doesn't include in our accessory box. Please refer to Figure 4-46 for the external switch connection.

Switch

1 2

Figure 4-46 One key to shut off terminal 51

4 Product Installation

Terminal definition

No.

Definition COM/DRMO

REFGEN

4.6 Monitoring Device Installation Sunways STH 3~8kW series hybrid inverter can be monitored through either WiFi or LAN, and you can alternatively select according to your preference. Plug the WiFi or LAN module into the Com1 port in the bottom of inverter by following the direction the side with indicator is up (as shown in Figure 4-47). A slight "click" sound during the installation represents that the assembly is in place.

Note

Figure 4-47 Monitoring device installation
The WiFi version module needs to be configured to the router for the first installation. If the router name or
password are changed, the WiFi dongle will need to be reconfigured. For details, please refer to the [QUICK INSTALLATION GUIDE] which is attached to the accessory bag.
If DHCP is enabled on the router, the LAN version module does not need to be configured. Otherwise, please
refer to the [QUICK INSTALLATION GUIDE] which is attached to the accessory bag.

5 Start and Stop
5 Start and Stop
5.1 Start Inverter When starting the inverter, follow these steps: Turn the DC switch in the inverter bottom to the "ON" position. Turn on the lithium battery switch. Switch on the AC breaker first. The inverter will start to check the DC and AC input parameters and self-check, and if everything is normal, the inverter will start to work according to the work mode which you set on the App. The inverter display and indicators will show relative parameters and status.
5.2 Stop Inverter When turning off the inverter, please follow the steps below: Shut off the inverter through the APP or the button on the display first. Disconnect the breakers on the grid and load side. Turn off the battery switch, and disconnect the DC breaker on the battery side (if any). Wait 30 seconds and then turn the inverter DC switch to the "OFF" position. At this time, there is remaining power in the inverter capacitor. Wait for 5 minutes until the inverter is completely de-energized before operating. Disconnect the AC and DC cables.
53

6 General Operation

6 General Operation
6.1 Display Operation When the inverter is turned on, the following interfaces will be displayed on the OLED display, and you can check the information and modify the parameters of the inverter by short or long pressing the button. Please refer to the following display operation flow for details:

6.1.1 Main Window and General Setting

Waing

Main Window

Checking

Normal

Fault Info

Firmware Updang

Advanced Settings

V-I PV 1\2

General Settings

System Info

Fault Info

SN/FM Version

Error Message

Batt Para

VbakA VbakB VbakC

IbakA IbakB IbakC

FreqA Freqb FreqC

Product Model
RSSI

H-Total

Meter E-Total

Not WiFi/LAN

WIFI Reset

LAN settingReWloIFaId

Setting WIFI settingSetting

Meter E-Day Safety Set Setting

CT Ratio

Power Factor

Feed in Grid

Export Limit

Battery_ID Set

WorkMode Set

Setting

Language Set

Time Set

Modbus Addr

Re-Connect

Setting

Short press(1s),switch window Long press(3s),enter the lower Menu

Tip: After every setting completed, wait for 10 seconds and the inverter will automatically save your settings or modifications. 54

6 General Operation

6.1.2 Advanced Setting

Advanced Settings

InPut Password

On-Off Grid SW

Relax OffGrid

OffGrid ReConn

Peakload Shifting

Verify OK

Setting

OFFGrid Volt

OFFGrid DOD

OFFGrid SocProt

OnGrid DOD

OnGrid SocProt

SetMaxGrid

Setting

OFFGrid Freq

Charg. S. time

Charg. E. time

Charg. P.Limit

Discharg. S. time

Discharg. E. time

Setting

Password Set

PaSsMsywsaotienrdmt.Set

UnbSayslatenm.Out Mpauintt.

Discharg. P. Limit

Setting

Restart SSetttoinpg Startup

Restart Stop
SSetatrttiunpg

SSeettttiinngg

6 General Operation

Inverter Display Abbreviation and Complete Name Reference Table

Abbreviation

Complete Name

Work Mode Peakload Shifting SetMaxGrid kVA OnGrid SocProt. OnGrid DOD OffGrid SocProt. OffGrid DOD OffGrid Volt OffGrid Freq Discharg.S.time Discharg.E.time Discharg.P.Lim. Charg. S.time Charg. E.time Charg. P.Lim. Unbalan. Output On-Off Grid SW Relax OffGrid
OffGrid ReConn.
FW Updating

Current Work Mode / Work Mode Setting Peakload Shifting Function Switch Set max allowed power from grid (under the condition of Peakload Shifting is on) OnGrid Bettery Soc Protection OnGrid Discharge of Depth OffGrid Soc Protecttion OffGrid Discharge of Depth OffGrid Voltage Setting OffGrid Frequency Setting Discharge Start Time (Available in Economic Mode) Discharge End Time (Available in Economic Mode) Discharge Power Limit (Available in Economic Mode) Charge Start Time (Available in Economic Mode) Charge End Time (Available in Economic Mode) Charge Power Limit (Available in Economic Mode) OnGrid 3-Phase Unbalanced Output Switch Off-grid Function SW (Inverter will automatically switch to off-grid mode to ensure the back-up side power supply when the gird is abnormal or off) Reduce the switching sensitivity of the On/Off-grid (applied to the places where the grid is unstable or inverter always entered off-grid mode for some reasons) When the power grid is off, the inverter can automatically restart the back-up output after a fault or overloading protection occurred if the Off-grid Restart is ON. Otherwise, the back-up output needs to be restarted manually Firmware Updating

6 General Operation

Abbreviation E-Day E-Total H-Total System Info FW Version SN Fault Info RSSI WiFi Reset WiFi Reld Export Limit Feed in Grid Re-Conect CT Ratio Modbus Addr Battery_ID Set System Maint.

Complete Name
Daily Energy Generation Total Energy Generation Total Generating Hours System Infomation Firmware Version Series Number Fault Information Received Signal Strength Indicator WiFi Reset WiFi Reload, to reload the WiFi module to factory settings On-Grid Export Limit Function Switch Set the percentage of the power that is allowed to feed to the grid Fault Reconnection Time Current Transformer Ratio Setting Modbus Address Setting Set Battery Model System maintenance, includes inverter stop and run, system restart

6 General Operation
6.2 Auto-Test This function is disabled by default, and only will be functional in the safety code of Italy. Short press the button several times until "Auto Test CEI 0-21" displays on the screen, press and hold the button 3 seconds to activate "Auto Test". After the auto test finished, short press the button several times until the screen displays "Auto Test Record", and hold the button 3 seconds to check the test result. Connect the AC cable, auto test will start after the inverter connected to the grid, see the operation steps below:

Short press(1s),switch window Long General Settings
press(3s),enter the lower Menu Setting OK

Short presNso(1ns)e,sewdittcohpwreinsds,ojwust wait Long press(3s),enter the lower Menu

General Settings

Test Pass/Fail
Remoted Cmd 1

Password 1111

Main Window

Auto Test CEI 0-21

If Tested

Local Cmd 1

Auto Test CEI 0-21

AutoIfTest Record Tested Test Record

IPS ItIePmS Item Test All Testing

IPS Pass/Fail

Wait

SSeelelecct t IItteemmss

IPS Item

TestIPASll Item Test Null

IPS Item Test Null

Wait

IPS Item xxxxIxPS Item xxxxx

Verified OK

Wait

Password

Password 1111 1111

Test Result Test Result DispDlaisyplay

6 General Operation
The auto test will start when the correct test item is selected, and the test result will be displayed on the screen when it finished. If the test success, it will display "Test Pass", otherwise will display "Test Fail". After each item tested, the inverter will reconnect to the grid and automatically start the next test item according to the requirements of CEI 0-21.
6.3 Online Monitoring APP
Sunways inverter provides a monitoring port that can collect and transmit data from the inverter to Sunways monitoring platform via an external monitoring device. Please refer to the product nameplate on side of enclosure to get the monitoring application. If download issues exist , contact your dealer or Sunways technical support.

Note

IPS Items including : Test Null , 59.S1 Test , 59.S2 Test , 27.S1 Test , 27.S2 Test,81 .S1 Test , 81 .S2 Test , Test ALL.

7 Troubleshooting

7 Troubleshooting
7.1 Fault Messages Sunways STH 3~8kW series single-phase hybrid inverter is designed in accordance with grid operation standard, and conform to the requirements of the safety and EMC. The inverter had passed a series of rigorous tests to ensure it runs sustainably and reliably before shipment. When a fault occurs, the corresponding fault messages will display on the OLED display, and in this case, the inverter might stop feeding into grid. The fault messages and their corresponding troubleshooting methods are listed below:

Error Message

Solution

Mains Lost

Check whether the mains supply is lost. Check whether the AC breaker and terminal are well connected.

Grid Voltage Fault

Check whether the impendence of the AC cable is too high to lead the grid voltage increased. Change a thicker AC cable if it is. Extend the voltage protection range if it is allowed by the electricity company.

Grid Frequency Fault

Check whether the AC cable is correct and well connected. Change to another country with wider protection range if it's allowed by the local electricity company.

DCI Fault

Restart the inverter. Seek for help from the installer or manufacture.

7 Troubleshooting

Error Message

Solution

PV Power Low

Check if part of the PV array is sheltered. Check if the sunlight is sufficient at the PV installed area.

Bat OV

Check whether the battery voltage exceeds the upper limit of the battery. Check battery terminal wiring.

Backup OV

Restart the inverter. Check the inverter Backup side wiring.

Bus Volt Low

Restart the inverter. Seek for help from the installer or manufacture.

Hard Fault

Restart the inverter. Seek for help from the installer or manufacture.

Backup OP

Reduce loads connected in the Backup side. Restart the inverter.

Inverter OV

Restart the inverter. Seek for help from the installer or manufacture.

7 Troubleshooting

Error Message

Solution

Inverter OF

Restart the inverter. Seek for help from the installer or manufacture.

Inverter OC

Restart the inverter. Seek for help from the installer or manufacture.

Phase Order Err

Restart the inverter. Seek for help from the installer or manufacture.

SCI Fault

Restart the inverter. Seek for help from the installer or manufacture.

FLASH Fault

Restart the inverter. Seek for help from the installer or manufacture.

Meter Comm Fault

Check the Meter wiring. Check whether the Meter is normal.

Battery Fault

Restart the inverter. Seek for help from the installer or manufacture.

7 Troubleshooting

7.2 Maintenance

Danger

Risk of inverter damage or personal injury due to incorrect service! Always keep in mind that the inverter is powered by dual sources: PV strings and utility grid. Before any service work, observe the following procedure. Disconnect the AC circuit breaker and then set the DC load-break switch of the inverter to OFF; Wait at least 5 minutes for inner capacitors to discharge completely; Verify that there is no voltage or current before pulling any connector.

Caution Attention
Note

Keep non-related persons away! A temporary warning sign or barrier must be posted to keep non-related persons away while performing electrical connection and service work.
Restart the inverter only after removing the fault that impairs safety performance. As the inverter contains no component parts that can be maintained, never arbitrarily replace any internal components. For any maintenance need, please contact Sunways. Otherwise, Sunways shall not be held liable for any damage caused.
Servicing of the device in accordance with the manual should never be undertaken in the absence of proper tools, test equipment or the latest revision of the manual which has been clearly and thoroughly understood.

Items

Methods

Period

System clean

Check the temperature and dust of the inverter. Clean the inverter enclosure if necessary. Check if the air inlet and outlet are normal. Clean the air inlet and outlet if necessary.

Six months to a year (it depends on the dust contents in air.)

8 Technical Parameters

Model

STH-3KTL-HSS STH-3.6KTL-HSS STH-3KTL-HS STH-3.6KTL-HSS STH-4.2KTL-HS

Start-up Voltage (V) Max. DC Input Voltage (V) Rated DC Input Voltage (V) MPPT Voltage Range (V) No. of MPP Trackers No. of PV Inputs Max. Input Current (A) Max. Short-circuit Current (A)
Battery Type Battery Communication Mode Battery Voltage Range (V) Max. Charge/Discharge Current (A) Rated Current of Built-in Fuse (A)
Rated Output Power (kW) Max. Output Power (kW) Max. Apparent Power (kVA) Max. Input Apparent Power (kVA) Max. Charging Power of Battery (kW) Rated Output Voltage (V) Rated AC Frequency (Hz) Max. Output Current (A) Power Factor Max. Total Harmonic Distortion DCI
UPS Switching Time Max. Apparent Output Power (kVA) Peak Output Apparent Power (kVA)

PV Input

600

360

100-550

1/1

15/15

20/20

Battery

Lithium Battery (with BMS)

CAN / RS485

85-500

30/30

63 Output (Grid)

3.6

3.3

3.96

3.3

3.96

3.3

3.96

3.3

3.96

7.2

3.6

L/N/PE, 220/230V

50/60Hz 45-55Hz/55-65Hz

0.8 leading ...0.8 lagging

<3% @Rated Output Power

<0.5%In

Output (Back-up)

<10ms

3.3 3.9 , 60s

3.96 4.7 , 60s

3.3 3.9 , 60s

3.96 4.7 , 60s

80 600 360 100-550
2 1/1 15/15 20/20
4.2 4.6 4.6 8.4 4.2
21
4.6 5.5 , 60s

8 Technical Parameters

Model

STH-3KTL-HSS STH-3.6KTL-HSS STH-3KTL-HS STH-3.6KTL-HSS STH-4.2KTL-HS

Voltage Harmonic Distortion
Max. Efficiency European Efficiency Battery Charged by PV Max. Efficiency Battery Charged by AC Max. Efficiency Max. Battery Discharge Conversion Efficiency
DC Reverse Polarity Protection Battery Input Reverse Connection Protection Insulation Resistance Protection DC Switch Surge Protection Over-temperature Protection Residual Current Protection Islanding Protection AC Over-voltage Protection Overload Protection AC Short-circuit Protection
Over Voltage Category Dimensions (mm) Weight (kg) Protection Degree Self-consumption at Night (W) Topology Operating Temperature Range (° C) Relative Humidity Operating Altitude (m) Cooling Noise Level (dB) Display Communication Compliance

Output (Back-up)

97.6% 97.0% 98.0% 96.6% 96.6%

<3% @Linear Load
Efficiency

97.6%

97.0%

98.0%

96.6%

Protection

Integrated Integrated

97.6% 97.0% 98.0% 96.6% 96.6%

Integrated

Optional

Integrated

Frequency Shift, Integrated

Integrated

General Data

Integrated

PV: Main:

550W*410H*175D

IP65

<15

Transformer-less

-30~60

0~100%

3000

Natural Convection

<25

OLED & LED

WiFi / LAN (Optional) IEC62109IEC62116VDE4105VDE0126AS4777RD1699NBR16149IEC61727
IEC60068IEC61683EN50549EN61000

8 Technical Parameters

Model

STH-4.6KTL-HS STH-5KTL-HS STH-6KTL-HS STH-7KTL-HS STH-8KTL-HS

PV Input

80 600 360 100-550
2 1/1 15/15 20/20

80 600 360 100-550
2 1/1 15/15 20/20
Battery

80 600 360 100-550
2 1/1 15/15 20/20

Lithium Battery (with BMS)

CAN / RS485

85-500

30/30

Output (Grid)

4.6

5/4.99

4.6

5.5/4.99

6.6

7.7

4.6

5.5/4.99

6.6

7.7

9.2

4.6

L/N/PE, 220/230V

50/60Hz 45-55Hz/55-65Hz

25/21.7

28.7

0.8 leading ...0.8 lagging

<3% @Rated Output Power

<0.5%In

Output (Back-up)

4.6 6 , 60s

<10ms 6.6
7.8 , 60s <3% @Linear Load

7.7 9.1 , 60s

80 600 360 100-550
2 1/1 15/15 20/20
8 8 8 12 8
36.3
8 10 , 60s

8 Technical Parameters

Model

STH-4.6KTL-HS STH-5KTL-HS STH-6KTL-HS STH-7KTL-HS STH-8KTL-HS

Max. Efficiency European Efficiency Battery Charged by PV Max. Efficiency Battery Charged by AC Max. Efficiency Max. Battery Discharge Conversion Efficiency
DC Reverse Polarity Protection Battery Input Reverse Connection Protection Insulation Resistance Protection DC Switch Surge Protection Over-temperature Protection Residual Current Protection Islanding Protection AC Over-voltage Protection Overload Protection AC Short-circuit Protection
Over Voltage Category Dimensions (mm) Weight (kg) Protection Degree Self-consumption at Night (W) Topology Operating Temperature Range (° C) Relative Humidity Operating Altitude (m) Cooling Noise Level (dB) Display Communication Compliance

97.6% 97.0% 98.0% 96.6% 96.6%

Efficiency
97.6% 97.0% 98.0% 96.6% 96.6%
Protection

97.6% 97.0% 98.0% 96.6% 96.6%
Integrated Integrated

97.6% 97.0% 98.0% 96.6% 96.6%

Integrated

Optional

Integrated

Frequency Shift, Integrated

Integrated

General Data

Integrated

PV: Main:

550W*410H*175D

IP65

<15

Transformer-less

-30~60

0~100%

3000

Natural Convection

<25

OLED & LED

WiFi / LAN (Optional) IEC62109IEC62116VDE4105VDE0126AS4777RD1699NBR16149IEC61727
IEC60068IEC61683EN50549EN61000

8 Technical Parameters
The grid feed in power for AS/NZS 4777.2 is limited 4.99kW & 4.99kVA & 21.7A. Max apparent power from the grid means the maximum power imported from the utility grid used to satisfy the backup loads and charge the battery. The output power will exceed the rated value only when the power in the PV array is sufficient, and the duration of the overload is relating to the overload power.

No. 1, Second Road, Green Industrial Zone, Chongshou Town, Cixi City, ZheJiang Province, PRC www.sunways-tech.com service@sunways-tech.com

S11-00034-00

Adobe PDF Library 15.0 Adobe InDesign CC 14.0 (Windows)