Related Manuals for Stealth ST-INV-S Series
Summary of Contents for Stealth ST-INV-S Series
- Page 1 User Manual ST-INV-S Series PV Energy Storage Grid- connected Inverter VER: 1.2 www.stealthenergy.cn...
- Page 3 The contents of the manual and the pictures, logos, symbols, etc. used are owned by Suzhou Stealth Energy Technology Co., Ltd. Persons who are not staff of the company are not allowed to publicly reproduce all or part of the content without written authorization.
- Page 4 User Manual Change history Below are the historical changes from previous versions of the manual. The latest document contains all changes made in previous versions. V1.2 (2023-02-20) ● Update 9.2 technical data. PV input: maximum input current (Ad.c.) and maximum short-circuit current (Ad.c.) V1.1 (2021-10-20) This version is the first formal version.
- Page 5 User Manual Symbol use In order to ensure the personal and property safety of users when using the product, and to use the product more efficiently and optimally, the manual provides relevant safety information, which is highlighted by the following symbols. Please take careful note of the meaning of the warning symbols so that you can minimize all risks.
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Page 6: Table Of Contents
User Manual Table of contents 1 Safety instruction 1.1 General safety instruction 1.2 Inverter 1.3 Skill requirements for professional technicians 2 Product description 2.1 PV energy storage grid-connected system 2.2 Product introduction 2.2.1 Model description 2.2.2 Product appearance 2.2.3 Dimension and weight 2.2.4 LED indicator 2.3 Function description 2.4 Working mode... - Page 7 User Manual 5.5 PV string connection 5.5.1 PV input device 5.5.2 Assembling the cable to the PV connector 5.5.3 Installing the PV connector Battery cable connection 5.6.1 Requirements on the battery side 5.6.2 Assembling the cable to the Bat connector 5.6.3 Installing the Bat connector 5.7 WIFI communication connection 5.8 Meter connection...
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Page 9: Safety Instruction
User Manual 1 Safety instruction The inverter is strictly designed and tested in accordance with relevant international safety standards. As a piece of electrical and electronic equipment, it is necessary to comply with relevant safety specifications during installation, testing, operation and maintenance. Unreasonable use or maloperation may result in: •... -
Page 10: Inverter
User Manual 1.2 Inverter The warning signs and descriptions on the inverter are shown in the table below: CE certified. TUV certified. RCM certified Watch out! Potential danger, please do not operate powered on! After the inverter is disconnected from all external power sources, wait at least 5 minutes before touching live devices. -
Page 11: Skill Requirements For Professional Technicians
Danger of electric shock! Only the intact and closed enclosure can protect the safety of people and property. Do not open the enclosure of the inverter when it is working or powered on, otherwise Stealth Energy will not be held responsible. -
Page 12: Product Description
User Manual 2 Product description 2.1 PV energy storage grid-connected system ST-INV-S3.0, ST-INV-S3.68, ST-INV-S4.0 and ST-INV-S5.0 are single-phase transformerless string PV energy storage inverters, as an important part of photovoltaic power generation system. The inverter converts the DC power generated by the PV panels into AC power that meets the grid requirements to supply the load, and the rest is charged to the battery and/or fed into the grid. -
Page 13: Product Introduction
2.2 Product introduction 2.2.1 Model description Take ST-INV-S5.0 for example: ST - INV – S 5.0 5.0: Power class code S: Single-phase INV: PV grid-connected inverter code ST: Stealth Table 2-1 Power description Model Rated output Rated grid voltage ST-INV-S3.0 3000VA 230Va.c. -
Page 14: Dimension And Weight
User Manual Fig. 2-2 Inverter appearance (ST-INV-S5.0 shown) 2.2.3 Dimension and weight Fig. 2-3 Inverter size marking (unit: mm) Model Width (mm) Height (mm) Depth (mm) Net weight (kg) ST-INV-S3.0 18.6 ST-INV-S3.68 ST-INV-S4.0 ST-INV-S5.0 2.2.4 LED indicator As a human-machine interface, LED indicators are located on the front of the inverter. By observing the flashing color and speed of the indicator, the user can obtain the current working status of the inverter. -
Page 15: Function Description
The inverter provides a variety of parameter configurations to meet various demands or to adjust its operating performance to its optimal settings. Users can view the information of inverter through the mobile App. For more professional configuration, please contact Stealth after-sales service. -
Page 16: Working Mode
The above introduction describes the general working mode of a photovoltaic system. The operation mode can be adjusted according to the system layout on the Stealth Cloud App. The followings are the general operation modes of photovoltaic energy storage systems. - Page 17 User Manual When there is no PV power supply, the battery will discharge to local loads. When the battery capacity is insufficient, the grid will provide energy. MODE _ II Feed-in priority The energy of the PV system will be first used for local loads, and then exported to public grid.
- Page 18 User Manual MODE_III Backup mode The battery can be charged by the grid, and the charging time/power can be set flexibly on the application. MODE_IV Off-grid mode When the grid is off, the system will provide energy to important loads through PV or battery. (Battery is required in EPS mode.) Notice In the case of grid connection, all working modes work normally when the battery...
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Page 19: Unpacking And Storage
• Unpack and check whether the internal equipment is in good condition. If you find any damage, please contact the shipping company or the after-sales service of Stealth directly, and provide photos of the damage, so as to obtain the fastest and best service. -
Page 20: Shipping List
User Manual Shipping list Expansion bolt (a set of Documentation Inverter (×1) M6*60) PV connector (2sets) M5*10 bolt (×2) M6*10 bolt (×1) Communication module Battery connector (1 set) Electricity meter (×1) (×1) 3-3 Shipping list a) Unless otherwise specified, the inverter diagrams in this document are illustrations for ST- INV-S5.0. -
Page 21: Mechanical Installation
User Manual 4 Mechanical installation Installation precautions Danger Before installing the inverter, make sure that the inverter has no electrical connection. Before drilling, make sure to keep away from the water and electricity wiring in the wall to avoid danger! Caution ！... - Page 22 User Manual • The installation wall must have fire resistance, and there must be no flammable materials or flammable gases in the installation space. Wall material is flammable Flammable materials or gases are found near the installation site • The installation height should be easy for observing the LED indicator. Install vertically for better heat dissipation.
- Page 23 User Manual • Avoid direct sunlight, rain and snow, and it is best to choose a sheltered installation site, which can prolong the service life of the equipment. • Reserve enough space during installation to facilitate air convection around the inverter and subsequent maintenance.
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Page 24: Installation Tools And Parts
User Manual Installation tools and parts Installation tools include, but are not limited to, the tools recommended below. When necessary, other aids can be used on site. Type Tools Tape Marker pen Tape ruler Knife Protective suit Multimeter (≥ 1100V) Anti-static bracelet Protective gloves General... -
Page 25: Installation Of Inverter
User Manual 4.4 Installation of inverter After transporting the inverter to the installation site, install the hanging plate onto the wall with expansion bolt assembly and then hang the inverter on the hanging plate. The expansion bolt assembly is shown in the figure below. M6 Bolt Expansion tube Flat washer... - Page 26 User Manual 2. Drill holes (with a depth of about 70mm) and install the hanging plate. 3. Lift up the inverter, hang the hanging loop on the back onto the hanging plate. Use 2 M5x10 screws to fasten the inverter to the hanging plate with a torque of 1.5Nm.
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Page 27: Electrical Connection
User Manual Electrical connection Personal protective equipment must be worn when working on electrical wiring. Danger There may be high voltage in the inverter! Pay attention to safety before making electrical connections. Exposure of PV strings to sunlight will generate dangerous voltages. Make sure all cables are de-energized before making electrical connections, and do not close the AC circuit breaker until electrical connections are completed. -
Page 28: Terminal Introduction
User Manual Terminal introduction The external wiring terminals are located at the bottom of the inverter, as shown in the figure below. The picture is for reference only, please refer to the actual product! Wiring Description terminal PV terminal Used to connect PV strings, with 2 pairs of PV terminals. BAT terminal Used to connect energy storage battery. -
Page 29: Overview Of Electrical Connection
Power grid impedance Remarks parallel machines requirements ST-INV-S3.0 ≤ 30 ＜ 49mΩ If the number of parallel machines exceeds ST-INV-S3.68 ≤ 30 ＜ 49mΩ please contact Stealth technical staff ST-INV-S4.0 ≤ 30 ＜ 49mΩ evaluation. ST-INV-S5.0 ≤ 30 ＜ 29mΩ... -
Page 30: Ground Connection
User Manual Name Remarks ST-INV-S3.0, ST-INV-S3.68, ST-INV-S4.0 and PV strings ST-INV-S5.0, with 2 pairs of PV terminals Communication module Ethernet port and WIFI module. AC circuit breaker Electrical connection protection device (not included in the shipping list) Grid Rated voltage is 230Vac. External energy storage Include batteries and BMS. -
Page 31: Grid And Back-Up Connection
User Manual Grid and Back-up connection The inverter is connected to the power grid through “L” (live wire), “N” (neutral wire) and “PE” (grounding wire). 5.4.1 AC side requirements AC circuit breaker In order to ensure that the inverter can be safely disconnected under load, an independent two- pole AC circuit breaker must be configured for each inverter as a protective device. -
Page 32: Assembling The Cable To The Ac & Back-Up Connector
42A connector according to the corresponding color. Notice Pay attention to the wiring layout of the AC terminals. Do not connect live wire to PE terminal. Otherwise, the inverter may not operate normally, and the resulting loss has nothing to do with Stealth. -
Page 33: Installation Of Ac Connector
User Manual 5.4.3 Installation of AC connector Step 1: Disconnect the AC side circuit breaker and prevent its accidental reconnection. Step 2: Measure the voltage and frequency of the grid connection point to ensure that they meet the grid connection specification of the inverter. Step 3: Plug the connector into the corresponding socket at the bottom of the inverter. - Page 34 User Manual Notice For Australian safety requirements, the neutral wires on the grid-connected side and EPS side must be connected together, otherwise EPS function will not work. Hybrid Inverter string This diagram is an example for grid systems in Australia, South Africa and New Zealand.
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Page 35: Pv String Connection
User Manual 5.5 PV string connection 5.5.1 PV input device ST-INV-S3.0, ST-INV-S3.68, ST-INV-S4.0 and ST-INV-S5.0 have two inputs of PV1 and PV2, and each input has a pair of PV terminals. The two PV inputs, each with independent MPPT, can be configured in independent mode or parallel mode. •... - Page 36 User Manual • Parallel mode In parallel mode, all PV strings connected to the inverter must have exactly the same characteristics, including: the same model, the same number of panels, the same inclination angle, and the same azimuth angle. In order to avoid the unbalance of the two input powers, or even the input load limit, the two PV input cables are required to be of the same model.
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Page 37: Assembling The Cable To The Pv Connector
User Manual 5.5.2 Assembling the cable to the PV connector Assemble the DC cable to the plug-in PV connector that mates with the PV terminals at the bottom of the inverter. The specifications of the DC cables are shown in the table below. -
Page 38: Installing The Pv Connector
User Manual 5.5.3 Installing the PV connector Installation steps: Step 1: Manually turn the DC switch on the bottom left to "OFF". Step 2: Check whether the polarities of the cables connecting the PV strings are correct, and ensure that the open-circuit voltage does not exceed the upper input limit of the inverter of 550V under any circumstance. -
Page 39: Battery Cable Connection
User Manual Battery cable connection Notice Since the battery is inflammable and explosive, the following requirements must be met when connecting the battery. Ensure that the battery box is free from bulging, peculiar smell and other special conditions. Ensure that the battery voltage does not exceed the upper and lower voltage limits that the battery can withstand under any circumstance. -
Page 40: Assembling The Cable To The Bat Connector
User Manual 5.6.2 Assembling the cable to the Bat connector The connection of the battery is the same as that of the PV, but different connectors are used to distinguish it from the PV connector. Assemble the DC cable to the plug-in Bat connector that mates with the Bat terminal at the bottom of the inverter. -
Page 41: Installing The Bat Connector
User Manual 5.6.3 Installing the Bat connector Step 1: Disconnect the DC circuit breaker. Step 2: Check whether the polarities of the battery connecting cables are correct, and make sure that the open-circuit voltage does not exceed the upper input limit of the inverter under any circumstance. -
Page 42: Wifi Communication Connection
Smart meters must be authorized by Stealth; any third-party’s or unauthorized meters may not be compatible with the inverter. Stealth will not be liable if the meter is not working. ST-INV-S3.0, ST-INV-S3.68, ST-INV-S4.0 and ST-INV-S5.0 adopt Acrel's smart meter with CT, which is used to detect the grid voltage, current direction and magnitude, and further indicate the operation status of the grid. - Page 43 User Manual METE GRID The CT line is default to be 3m, and can be extended up to 5m. The smart meter communication cable (RJ45) is attached to the inverter (cable "connected to smart meter"), can be extended up to 100m and must use a standard RJ45 cable and plug as shown below 485B 485A...
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Page 44: Dred Connection
User Manual Smart Meter LED indication Normally on Flashing Not operating Operating (Green) normally Communicating (Red) communicating Power is Power is (Red) positive negative Negative (Red) indicator 5.9 DRED connection The inverter provides DRM to support various demand response modes by issuing control signals as follows. -
Page 45: Bms Connection
User Manual The DRM communication cable (RJ45) is attached to the inverter (cable "connected to peripheral DRED device"), and must use a standard RJ45 cable and plug as shown below DRM1/5 DRM2/6 DRM3/7 DRM4/8 +3.3V_COM DRM0 +3.3V_COM GND_COM 5.10 BMS connection The communication interface between the inverter and the battery is a RJ45 connector with CAN. -
Page 46: Test Run
User Manual 6 Test run 6.1 Inspection before test run Before turning on the inverter for the first time, the following inspections shall be made. 1. Check whether the inverter is firmly installed and whether the installation position is convenient for operation and maintenance. 2. -
Page 47: Decommissioning, Removing And Discarding
User Manual 7 Decommissioning, removing and discarding inverter 7.1 Decommissioning inverter It is not necessary to shut down the inverter under normal circumstances, but when maintenance or repair work is required, the inverter needs to be shut down. Please follow the following steps to disconnect the inverter from AC, DC power, and batteries;... -
Page 48: Removing Inverter
User Manual 7.2 Removing inverter Refer to "5 Electrical connection" and "4 Mechanical installation", and follow the reverse steps to remove the inverter. Caution ！ Danger of burns and electric shock! The inverter must be disconnected from the power grid for at least 5 minutes before maintenance or repair operations inside the equipment can be performed. -
Page 49: Troubleshooting And Maintenance
2. If it is not within the allowable range, disconnect PV+, PV-, Bat and Grid, and restart the inverter; 3. If the fault still exists, please contact the Stealth customer service center. Bus voltage fault 1. Disconnect PV+, PV-, Bat and Grid, and restart the inverter;... - Page 50 3. If the fault occurs repeatedly, please contact the Stealth customer service center. 1. Disconnect PV+, PV-, Bat and Grid, and restart the inverter; Inverter current 2. If the fault still exists, please contact the Stealth customer DC component service center. fault 1.
- Page 51 1. Disconnect PV+, PV-, Bat and Grid, and restart the inverter; Hybrid_I relay 2. If the fault still exists, please contact the Stealth customer service fault center. 1. Check whether the air switch of battery is on, start button of battery is pressed and communication wire is loose;...
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Page 52: Daily Maintenance
If any repair service is required, please contact the Stealth Energy After-sales Service Center. Otherwise, Stealth Energy will not bear any warranty and joint liability for the resulting losses. Inspection method... -
Page 53: Appendix
User Manual 9 Appendix 9.1 Confirmation before contact If you have any questions about this product, please contact us. In order to provide you with faster and better after-sales service, we need your assistance to inform us of the following information: •... - Page 54 User Manual Grid-connected output/input Grid-connected output Model ST-INV-S3.0 ST-INV-S3.68 ST-INV-S4.0 ST-INV-S5.0 Rated apparent 3000 3680 4000 4991 power (W) Max. apparent 3000 3680 4000 4991 power (VA) Rated voltage (Va.c.) Rated frequency 50/60 (Hz) Rated current 13.1Aa.c. 16Aa.c. 17.4Aa.c. 21.7Aa.c. Surge current (peak 30A/500μs 35A/500μs...
- Page 55 User Manual General data Model ST-INV-S3.0 ST-INV-S3.68 ST-INV-S4.0 ST-INV-S5.0 Dimension (W/H/D) [mm] 411*505*195 Weight (kg) 19.3 Installation method Wall-mounted Power factor (range) 0.8leading-0.8lagging Operating temperature range -25~60 (℃) Storage temperature -25~60 (℃) Storage/Operating 0%~100% relative humidity Altitude (m) 2000 Ingress Protection IP65 Cooling method Passive...
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Page 56: Quality Assurance
Operating temperature -30~70 (℃) 9.3 Quality assurance Suzhou Stealth Energy Technology Co., Ltd. (hereinafter referred to as the company) will repair or replace it with a new product free of charge for any product that fails during the warranty period. Evidence During the warranty period, the company requires customers to present the invoice and date of purchase of the product. - Page 57 • Any incompatible batteries, loads or other equipment are connected to the PV energy storage system. Note: Stealth reserves the right to interpret all content in this user manual. In order to ensure IP65, the inverter must be well sealed, please install the inverter within one day after unpacking, otherwise please seal all unused terminals/ holes, do not allow any terminal/hole to be opened, and confirm that there is no risk of water and dust entering.
- Page 58 Suzhou Stealth Energy Technology Co., Ltd. www.stealthenergy.cn TEL: +86 0512-66720026 Mail: Sales@stealthenergy.cn E-mail: Sales@stealthenergy.cn Add: 8F, No. 198, Jinfeng Road, Huqiu District, Suzhou, Jiangsu Province, China...