SAJ CHS2 Series Manual
C&i energy storage system
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Summary of Contents for SAJ CHS2 Series
- Page 1 CHS2 Series CHS2 Series C&I ENERGY STORAGE SYSTEM Tel: (86)20 66608588 Fax: (86)20 66608589 Web: www.saj-electric.com GUANGZHOU SANJING ELECTRIC CO., LTD Add: SAJ Innovation Park, No.9, Lizhishan Road, Science City, Guangzhou High-tech Zone, Guangdong, P. R. China V1.1...
- Page 2 CHS2 Series Preface Thank you for choosing SAJ products. We are pleased to provide you first-class products and exceptional service. This manual includes information for installation, operation, maintenance, trouble shooting and safety. Please follow the instructions of this manual so that we can ensure delivery of our professional guidance and wholehearted service.
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Page 3: Table Of Contents
CHS2 Series TABLE OF 5.4. Connect the PV-side Cables ..................................42 5.5. Communication Connection ..................................47 5.6. Install the Communication Module ................................ 57 CONTENTS 5.7. System Connection ...................................... 59 5.8. System Connection Diagrams .................................. 61 5.9. AFCI............................................ 64 6. COMMISSIONING ..............................65 1. -
Page 4: Scope Of Application
CHS2 Series 1.1. Scope of Application This User Manual describes instructions and detailed procedures for installing, operating, maintaining, and troubleshooting of the following CHS2 Energy Storage Systems (ESS): ⚫ CHS2-29.9K-T4-X ⚫ CHS2-50K-T6-X 1.2. Safety Instructions DANGER · DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. - Page 5 · Do not stay close to the equipment while there are severe weather conditions including storm, lighting, etc. · Before opening the housing, the SAJ inverter must be disconnected from the grid and PV generator; you must wait for at least five minutes to let the energy storage capacitors completely discharged after disconnecting from power source.
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Page 6: Explanations Of Symbols
Operate and use the battery properly according to the user manual. Any attempt to modify the battery without Danger of electrical voltage the permission from SAJ will void the limit warranty for the battery. This device is directly connected to public grid. All operations to the battery shall only be carried out by qualified personnel. -
Page 7: Emergency Situation
CHS2 Series • Electrical hazard: Battery explosion can result in fire and explosion accidents. Fire hazard To prevent battery explosion: WARNING 1) Avoid short circuit of the battery. · If a small fire started shortly near the battery pack, try to disconnect the battery circuit breaker and cut off the power supply Short circuit will generate high heat inside the battery, resulting in partial electrolyte gasification, which will first, but only if you can do so without endangering yourself. -
Page 8: Product Information
CHS2 Series 3.1. Product Application Scope This product is a high-performance Commercial & Industrial (C&I) Energy Storage System (ESS) equipped with advanced battery technology, ideal for large residential, small-scale industrial, and commercial applications. Designed to efficiently store energy for later use, the ESS features an integrated Battery Management System (BMS). -
Page 9: Terminals Description
CHS2 Series 3.2. Specification of Product Model 3.4. Terminals Description CHS2 ① ② ③ ④ ① CHS2 represents the product name. ② xK indicates the rated energy of the storage system in kW. For example, 50 means 50 kW. The value of x includes 29.9 and 50. - Page 10 CHS2 Series Callout Silkscreen Function The ports for cable connections to/from the CH2 inverter and the A, B, C, D, E, F, G expansion CB2 systems. The AC circuit breaker. The positive port for DC input and output from/to the inverter.
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Page 11: Data Sheet
CHS2 Series The RSD connection port. DRY/SHUT DOWN The connection ports for dry contact and emergency shut down devices. The connection port for external generator. BMS/LAN/EMS/METER/PARELLEL The connection ports for the listed systems. 120Ω The DIP switches for the 120Ω terminal resistors. - Page 12 CHS2 Series CHS2-29.9K-T4- CHS2-29.9K-T4- CHS2-29.9K-T4- CHS2-29.9K-T4- CHS2-50K-T6- CHS2-29.9K-T4- CHS2-29.9K-T4- CHS2-29.9K-T4- CHS2-29.9K-T4- CHS2-50K-T6- Model Model 204.8V/280Ah/5 256.0V/280Ah/64 307.2V/280Ah/77 358.4V/280Ah/90 204.8V/280Ah/ 204.8V/280Ah/5 256.0V/280Ah/64 307.2V/280Ah/77 358.4V/280Ah/90 204.8V/280Ah/ 1.5kWh .4kWh .3kWh .2kWh 51.5kWh 1.5kWh .4kWh .3kWh .2kWh 51.5kWh AC Output [On-grid] Protection Rated AC Power [W]...
- Page 13 CHS2 Series CHS2-50K-T6-25 CHS2-50K-T6-30 CHS2-50K-T6 CHS2-50K-T6 CHS2-50K-T6 CHS2-50K-T6-25 CHS2-50K-T6-30 CHS2-50K-T6 CHS2-50K-T6 CHS2-50K-T6 Model Model 6.0V/280Ah/64.4k 7.2V/280Ah/77.3k -358.4V/280A -358.4V/280A -358.4V/280A 6.0V/280Ah/64.4k 7.2V/280Ah/77.3k -358.4V/280A -358.4V/280A -358.4V/280A h/90.2kWh h/180.4kWh h/270.6kWh h/90.2kWh h/180.4kWh h/270.6kWh DC Input Max. Input Current [A] Max. PV Array Power [Wp]@STC...
- Page 14 CHS2 Series CHS2-50K-T6-25 CHS2-50K-T6-30 CHS2-50K-T6 CHS2-50K-T6 CHS2-50K-T6 Model 6.0V/280Ah/64.4k 7.2V/280Ah/77.3k -358.4V/280A -358.4V/280A -358.4V/280A h/90.2kWh h/180.4kWh h/270.6kWh Operating Temperature Range -30℃ to +50℃ (45℃ to 50℃ with derating) Cooling Method Air Conditioner Ambient Humidity 0-100% Non-condensing Altitude [m] 2000 Ingress Protection...
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Page 15: Installation Instructions
4.1. Unpacking 4.1.1. Check the Outer Package Although SAJ products are thoroughly tested and checked before delivery, the products may suffer damages during transportation. Check the package for any obvious signs of damage, and if such evidence is present, do not open the package and contact your dealer as soon as possible. -
Page 16: Mounting Method
CHS2 Series 4.2. Installation Method and Position 4.2.1. Installation Position and Space Requirement This device is equipped with an air conditioner for cooling and provides the ingress protection of IP 55 (Battery) and IP66 (Inverter). The device can be installed either indoors or outdoors. -
Page 17: Mounting Procedure
CHS2 Series Installation Environment Requirements • The installation environment must be free of inflammable or explosive materials. • Install the device away from heat sources. Multimeter Measurement Marker Measuring tape Utility knife Wrist strap • Do not install the device at a place where the temperature changes extremely. -
Page 18: Transportation Equipment
CHS2 Series 4.3.2. Transportation Equipment Crane Use a crane to move or lift the cabinet. A force greater than two tons is required to move this device. The The installers need to prepare proper equipment for transporting and lifting the product components. For height between the sling and the top surface must be greater than or equal to 1.5 meters. -
Page 19: Mount The Cabinet
CHS2 Series 4.3.4. Mount the Cabinet Step 3. Move and place the cabinet to the installation location with a forklift or crane. Align the holes at the cabinet bottom with the drilled holes. Select one of the following options to secure the cabinet: ⚫... - Page 20 CHS2 Series To secure the cabinet with the mounting brackets: Step 3. Remove the mounting brackets, and use an electrical drill to drill four holes on the floor at the depth of 80-90 mm. Put an expansion tube in each hole. (M12*80) Step 1.
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Page 21: Connect The Grounding Cable
CHS2 Series 5.1. Connect the Grounding Cable Electrical connection must only be operated by professional technicians. Before connection, the technicians must wear necessary protective equipment, including insulating gloves, insulating shoes and safety helmet. WARNING Connect the grounding cable before other electrical connections. - Page 22 CHS2 Series Step 3. Use a knife to cut the end of the cable sleeves at the cable outlet holes. 5.2. Organize the Cables and Remove the Covers Procedure Step 1. Remove the metal plate at the bottom right corner of the cabinet for wiring convenience.
- Page 23 CHS2 Series Step 5. Remove the AC cover, the middle beam, and the baffles under the inverter. 5.3. Connect the AC Cables Prepare the GRID cables according to the following specifications: Model Conductor cross-sectional area of cables (mm²) Conductor material...
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Page 24: Earth Fault Alarm
CHS2 Series 5.3.2. External AC Circuit Breaker Step 2. Secure the inner core wires of the GRID, GEN, and BACKUP cables to the terminals of L1, L2, L3, N, and PE on the inverter. Install an external circuit breaker to ensure that the inverter can be disconnected from the grid safely. Prepare... - Page 25 CHS2 Series Step 2. Loosen the lock screws on the positive and negative connectors. WARNING · Danger to life due to electric shock from touching the live components or DC cables. · When the photovoltaic array is exposed to light, it supplies DC voltage to the PCE. Touching live DC cables can result in death or lethal injures.
- Page 26 CHS2 Series Step 6. Tighten the lock screws on the positive and negative cable connectors with the D4 assembly tool. Step 8. Insert the positive and negative cable connectors into the positive and negative PV ports on the inverter until you hear a “click” sound.
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Page 27: Communication Connection
CHS2 Series 5.5.2. Connect the Communication Cables and Plugs Step 9. Install the PV cover back on the PV port, and secure the cover with screws. Step 1. Prepare the wires for the 2-pin, 3-pin, and 6-pin plugs depending on which communication functions are required. - Page 28 CHS2 Series 5.5.3. Meter Connection for Export Limit Setting When two meters are used, set the address of the inverter-side meter to 2. Do NOT change the default address 1 of the grid-side meter. The CT arrow direction points to the CHS2 inverter.
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Page 29: Dry Contact Connection
CHS2 Series 5.5.4. Dry Contact Connection Meter DTSU666 Button Description The DRY.DO1 and DRY.DO2 ports are reserved as an output dry contact for future use. Confirmation or cursor shift (when input digits) Exit → Table 5.5. Meter DTSU666 description To set a three-phase meter, perform the following operations:... - Page 30 CHS2 Series 5.5.6. DRM Connection The RSD_1 and RSD_2 ports can supply power to the external energy management system (EMS) in the parallel deployment of the inverters. The DRED ports can connect with demand response enabling devices (DRED) to provide the DRED signal At least two inverters must provide the power supply to the EMS in parallel deployment.
- Page 31 CHS2 Series 5.5.9. DIP Switch Connection 5.5.10. RJ45 Ports Connection RS485_PAR1/RS485_PAR2 METER The SW1/2/3 dual inline package (DIP) switches are provided to control the activation of 120 Ω terminal RS485-1B resistors to ensure the communication stability of the corresponding communication functions.
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Page 32: Install The Communication Module
CHS2 Series Step 2. Install the crossbeam suspended in the middle of the inverter and the baffle under the inverter back to Step 2. Install back the decorative panels on the front of the inverter. their original positions. Step 3. Secure all parts of the grid and backup connector tightly. -
Page 33: System Connection
CHS2 Series The following figure shows the system connection for the grid system without special requirements. 5.7. System Connection Note：The backup PE line and earthing bar must be grounded properly. Otherwise, the backup function may be inactive during blackout. The following figure shows the system connection applicable in Australia and New Zealand. -
Page 34: System Connection Diagrams
CHS2 Series 5.8. System Connection Diagrams 5.8.2. Back-up Parallel Deployment 5.8.1. Backup Single Deployment The example of CAN connection is as follows: The following diagram shows the system connections of a single machine where both the backup and the on-grid loads are enabled. -
Page 35: Afci
CHS2 Series 5.8.3. On-grid Parallel Deployment 5.9. AFCI The inverter is equipped with an arc-fault circuit interrupter (AFCI). With AFCI protection, when there is an arc signal on the DC side due to the aging of the cable or loose contact, the inverter can quickly detect it and cut off the power to prevent fire to ensure the PV system safety. -
Page 36: Commissioning
CHS2 Series 6.1. Start Up and Shut Down the Inverter 6.1.1. Start Up Step 1. Turn the two DC switches to the ON position on the inverter to enable the PV side connection. Step 2. Turn on the external AC circuit breaker to enable the connection to the grid. -
Page 37: Led Indicators Introduction
CHS2 Series Note: If the main switch suddenly trips while the machine is running, reset the main switch and rotate the LED indicator Status Description main switch to the ON position again. Step 5. Close the cabinet doors and keep the keys at a safe place. -
Page 38: Installing The App
CHS2 Series If you do not have an account, register first. LED indicator Status Description Solid on The AC side load is running properly. On 1s, off 1s The AC side consumption is overloaded. Backup The AC side is turned off. - Page 39 CHS2 Series Note: When the inverters are used in parallel, you need to select Storage on-grid parallel. For more instructions on parallel App operation, please refer to the user manual provided with the EMS product.
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Page 40: Protection Parameters Setting
CHS2 Series 6.5 Protection Parameters Setting The corresponding modification of protection parameters will take effect only after saving. The country and grid code can be viewed on the Initialization page. For example: 6.6 Inverter Setting Review After commissioning, the users can check the device info including device basic info, running info and event... -
Page 41: Remote Monitoring
CHS2 Series The power quality response modes and the grid connection settings can be viewed on the Protection 6.8 Working Modes Parameters page. For example: 6.8.1 Selecting Working Modes Self-consumption Mode: When the solar is sufficient, electricity generated by photovoltaic system will be supplied to load first, the surplus energy will be stored in battery, then the excess electricity will be exported to the grid. -
Page 42: Export Limit Setting
• Ensure that Country is set to Italy and Grid Compliance is selected properly. To check the settings, choose Initialization on the Local Connection page. On the Local Connection page, tap Export/Generation Limitation Setting to set the parameters. Contact SAJ technical support for the password. -
Page 43: Configuring The Reactive Power Control (For Australia Only)
3. After the self-test is completed, tap the search icon on the top right corner to check the test report. Download the test report if the self-test fails and contact SAJ or your inverter supplier. Example of fixed reactive power mode:... - Page 44 CHS2 Series Figure 6.4 Curve for a Volt-Var control mode (AS4777 Series) 6.11.2 Setting the V-Watt and Volt-Var Modes Step 1. Since AS4777 grid compliance has been set during production, select the corresponding grid This inverter complies with AS/NZS 4777.2: 2020 for power quality response modes. The inverter satisfies compliance according to state regulation during installation.
- Page 45 CHS2 Series Note: With regard to the Power rate limit mode, SAJ sets the product WGra to 16.67%Pn by default in the following cases according to the requirements of 3.3.5.2 as 4777.2: 2020. 1. Soft ramp up after connection. 2. Reconnect or soft ramp up/down following a response to frequency disturbance.
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Page 46: Transportation & Storage
The battery cannot be disposed of as household refuse. When the service life of the battery reaches the limit, it is not required to return it to the dealer or SAJ, but it must be recycled to the special waste lithium... -
Page 47: Troubleshooting
CHS2 Series 8.1. Troubleshooting Contact your supplier for troubleshooting and remedy. Code Fault Master Relay Error Master EEPROM Error Master Temperature High Error Master Temperature Low Error Lost Communication M<->S GFCI Device Error DCI Device Error Current Sensor Error Master Phase1 Voltage High... - Page 48 CHS2 Series Master PV Voltage High DRM0 Error Master Islanding Error Master Arc Error Master HW Bus Voltage High Master SW PV Current High Master HW PV Current High Battery Voltage High Master Self-Test Failed Battery Current High Master HW Inv Current High...
- Page 49 CHS2 Series CO sensor triggered Stroke switch triggered Temperature sensor triggered Smoke sensor triggered Water sensor triggered Aerosol triggered Emergency stop T/H sensor communication lost Air conditioning communication lost Temperature inside cabinet too high Temperature inside cabinet too low Humidity too high...
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Page 50: Routine Maintenance
CHS2 Series 9.1. Suggested Maintenance Operations Product parts Operation Standard Interval Power OFF Cabinet Visual inspection： No obvious coating peeling or scratches. Quarterly • Rust No obvious paint fading or rusting. • Door locks Door lock is not damaged. • Air vents No dust accumulation in the vent. -
Page 51: Appendix
10.2. Warranty Visit the SAJ website for warranty conditions and terms: https://www.saj-electric.com/. 10.3. Contacting Support Guangzhou Sanjing Electric Co., Ltd. Address: SAJ Innovation Park, No.9, Lizhishan Road, Guangzhou Science City, Guangdong, P.R.China. Postcode: 510663 Website: https://www.saj-electric.com/ Technical Support & Service...
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