ATESS HPS Hybrid Energy System User Manual

1 Introduction

This manual provides detailed product information and installation instructions for the ATESS HPS series energy storage integrated inverter. Users should read this manual carefully before using the product and store it in a convenient place for installation, operation, and maintenance. ATESS will not inform users of any modifications to this manual. The contents of the manual will be updated and revised constantly, and there may be slight discrepancies or errors between the manual and the actual product. Users should contact their local distributors or log in to the ATESS website (www.atesspower.com) to download the latest version of the manual.

1.1 Contents

This section outlines the structure of the manual.

1.2 Target readers

This manual is intended for professional electricians certified by relevant departments for installation. Operators should be familiar with the structure and working principles of the energy storage system, this manual, and local project standards.

1.3 Symbols

Symbols are used to highlight important safety information for personal and property safety.

2 Safety Instructions

2.1 Notice for use

Installation and service personnel must be trained and familiar with electrical equipment safety requirements and local laws and regulations. Read this manual carefully before operation. Operation must be performed by qualified technicians only. Do not touch any electrical parts except the touch-screen during operation. All electrical operations must comply with local electrical standards. Permission from the local utility company is required before installing the energy storage system.

2.2 Installation

Proper installation requires following all instructions in the user manual. The inverter has an IP20 protection level and is designed for indoor installation. Refer to Chapter 5 for installation instructions. Other notices include paying attention to safety instructions, the energy storage controller user manual, and technical data.

2.3 Important note

• Static electricity can damage the inverter's internal components. Comply with anti-static protection norms.
• The inverter cannot be directly used to connect life support equipment and medical equipment.
• Ensure no tools or unnecessary items are left inside the inverter before startup.
• Maintenance can only be carried out after the inverter is totally discharged.

3 Product Description

3.1 Energy Storage system

The ATESS HPS series bidirectional battery inverter is designed for energy storage systems. It converts DC current from a battery bank into AC current for the load/grid and can also take power from a solar inverter or grid to charge the battery, ensuring uninterrupted power supply.

Diagram Description: A system diagram shows PV modules connected to a combiner, then to the HPS. The HPS is connected to a battery, a router, a server, and the grid. An APP is also shown. Communication and power cables connect these components.

3.2 Circuit diagram of the inverter

A circuit diagram illustrates the internal connections of the inverter, including PV input, MPPT, DC-AC conversion, transformer, filters, contactors, breakers, and connections to the battery, grid, and load.

3.3 The layout of the main components

3.3.1 External components

The main external components include an LED indicator, LCD touch screen, off-on knob, emergency stop button, and dust screen.

Indicator Lights:

• POWER: Yellow light indicates normal power supply.
• FAULT: Red light indicates a circuit system failure.

Emergency STOP: This button immediately disconnects the inverter from the grid and battery in emergencies. The device locks in the 'off' position and can be reset by rotating clockwise and closing AC/DC breakers.

Off-on knob: Used to start or stop the inverter.

Touch screen: Displays operating parameters, power generation, and fault information. Refer to Section 7 for details.

Indicator: Two LED indicators display the inverter's status.

3.3.2 Internal component

Internal components include PV circuit breaker, battery circuit breaker, power grid circuit breaker, maintenance switch, load circuit breaker, power supply micro break, AC lightning protection switch, and PCB.

4 Transportation and storage

4.1 Transportation

Follow the transportation methods described in the user manual. Consider the inverter's weight and center of gravity. Use qualified lifting equipment and personnel. The inverter should be kept vertical, with an inclination not exceeding 10 degrees. Do not place it upside down or transport it horizontally. Incorrect handling can lead to injury, property loss, and damage.

4.2 Inspection and storage

Check the inverter carefully before signing for delivery. Notify the transportation company of any defects or damage. ATESS HPS50 can only be stored when stopped, with doors closed, in a dry room to protect internal circuits from dust and moisture.

5 Installation

5.1 Installation condition requirements

For normal operation, the installation environment requires:

• Ingress protection of inverter is IP20; avoid humid environments.
• Install indoors, avoid sunlight and rain.
• Ensure good ventilation of the room.
• Maintain a clean installation environment.
• Install away from residential quarters due to operational noise.
• Ensure the installation ground is even, firm, and capable of supporting the inverter's weight.
• Ensure the installation position is convenient for maintenance.
• Ambient temperature range: -25°C to 55°C.
• Reserve appropriate space for ventilation and cooling.

Foundation requirement: Install on an even ground with fire-retardant material or channel steel support. The foundation must be solid, safe, reliable, and capable of bearing the inverter's load.

Clearance space: Leave appropriate space for maintenance channels, emergency access, and ventilation. A minimum of 0.8m in front and back, and 0.8m on top is recommended.

Cable trench: Cable trenches are recommended for bottom inlet and outlet connections to ensure easy installation and maintenance.

Wiring specification: Keep power cables and data cables separate. Power cables should be routed at right angles to data cables and kept as short as possible. Maintain a distance of at least 0.2m between power and data cables. Crossed cables should be at 90 degrees.

5.2 Tools and spare parts required for whole machine installation

Required tools include hoisting crane/forklift, torque wrench, screwdriver, wire stripper, terminal crimping machine, heat dryer, megger, and multimeter.

5.3 Mechanical installation

5.3.1 Transportation of packaged whole machine

The inverter is transported as an integrated unit. It can be hoisted from the bottom or moved with a forklift or crane. Avoid tilting, violent shaking, or sudden forces during movement. Use a forklift if possible. Lay DC input and AC main power supply cables before installation, as they are difficult to cable after the inverter is installed.

Handling Precautions:

• Handle with care to avoid vibration and collision.
• When lifting, ensure the lifting angle is 70° and be cautious of the center of gravity.
• Always pay attention to the center of gravity.
• Take necessary auxiliary measures for personnel safety and equipment delivery.

5.3.2 Movement and installation of bare machine

Demolish the package of inverter: Follow procedures to remove side panels, packaging material, and pallet screws. Remove front and back cover lids, unscrew hold-down nuts, and remove screws to detach the inverter from the pallet.

Movement and installation of bear machine: The inverter can be moved with a forklift, crane, or slide rail. If moving a long distance after package demolition, use a forklift with the wood pallet. Ensure the center of gravity is placed correctly on the forklift.

5.4 Electrical installation

5.4.1 Input and output requirements

• Battery: Operating voltage range is 352V-600V.
• PV module: Maximum MPPT working voltage should not exceed 820V, and open circuit voltage should not exceed 1000V. The MPPT voltage range should be 480V-800V.
• PV and battery configuration: MPPT voltage should be greater than the maximum battery voltage. A difference of 100V is recommended for optimal configuration.
• Three phase grid connection: The inverter constantly detects grid conditions. Refer to local grid connection regulations for parameters. The grid is three-phase. Local power department permission is required.

5.4.2 DC side wiring

Caution: Do not connect battery terminals in reverse. Use a multimeter to determine polarity before connecting. Follow specific procedures for stripping insulation, crimping copper noses, installing heat shrink sleeves, and connecting terminals securely.

5.4.3 AC side wiring

Caution: Cut off the AC side circuit breaker before connecting AC wires. Ensure correct phase sequence. Follow procedures for stripping insulation, crimping copper noses, installing heat shrink sleeves, and connecting L1, L2, L3, and N lines.

5.4.4 Earthing

Ensure proper earthing for safety. Connect PE terminals securely. The earthing cable should be larger than the load cable. Earthing resistance should not be lower than 4Ω. Seal connection ports with dust cotton to prevent dust ingress.

5.5 Communication

The ATESS HPS series supports various communication modes. The control board interface includes ports for program update, screen, RS485, and CAN communication.

• RS485 communication: Used for communication with Shinemaster or other monitoring equipment. Terminal blocks are used for RS485 communication lines, which should not exceed 1000m. Use special shielded communication lines for quality transmission.
• BMS-CAN communication: Required when the inverter is equipped with a battery with BMS. Connect CAN A of the inverter to the CAN port of the battery. Use shielded communication lines.
• ATS-CAN communication: Used when the inverter is used with an ATESS ATS. Connect CAN-B of the inverter to the CAN interface of the ATS. Only ATESS-produced ATS can communicate with the inverter.
• Parallel communication: Required when two same HPS models are used in parallel. Use the provided DB9 communication line to connect the parallel interfaces.

5.6 ATS wiring

An ATS is required to connect to both utility grid and generator. The main wiring involves power lines, CAN communication lines, and AC power lines. The diagram shows connections between HPS, ATS, and the utility grid/generator.

5.7 Diesel generator dry contact wiring

The inverter uses a passive dry contact to control the diesel generator. Wiring instructions are provided for the dry contact structure.

5.8 Parallel wiring

Parallel operation system: Two same HPS models can be used in parallel for output and load supply in the same mode. Parallel operation maintains the same AC frequency, amplitude, and phase.

System requirements: Must be the same HPS model. Requires customized parallel program. Supports up to two HPS units in parallel.

5.9 Critical load and Non-critical load connection

Wiring instructions are provided for connecting critical and non-critical loads. Diagrams illustrate two options for connecting loads, with and without a generator.

Operation description: When PV power meets critical load and battery charging needs, excess power can supply non-critical loads or be fed to the grid. Power fed to the generator is not supported.

6 Commissioning

6.1 Inspection before operation

Before operation, inspect the installation. At least two staff should perform the inspection, checking for:

• Installation items: Inverter condition, foundation stability, clearance space, environmental conditions (temperature, humidity, ventilation), cooling air, and cabinet sealing.
• Electrical inspection: Grounding, grid voltage match, phase sequence, DC input polarity, communication wiring, cable marking, and insulation protection covers.
• Other inspection: Conductive parts tied with insulating ties, absence of tools/foreign matter inside the cabinet, and no condensation.

6.2 Pilot operation completion

After normal operation, perform pilot operation procedures: inspect for abnormalities (noise, heat, smell), measure voltage, current, and THD stability, check LCD control panel accuracy, and test operation logic. This completes the pilot operation.

7 GUI instruction

7.1 LCD display screen introduction

The LCD touch screen displays inverter operation information and allows parameter setting. The home page shows operating status, PV power, battery power, output power, and other key data. Function keys allow navigation to other pages like historical data, system settings, and power on/off.

7.2 LCD operation

7.2.1 Home page

The home page displays real-time operating status, PV power, battery power, output power, and other parameters. Navigation keys allow access to other pages.

7.2.2 ON/OFF interface

This interface allows turning the inverter on and off using the 'ON' and 'OFF' buttons or the start/stop knob.

7.2.3 Operation data

This section displays current parameters and real-time data, including grid voltage, frequency, current, DC input voltage, and temperature. Data is stored on a USB drive every 10 seconds. Power curves show daily battery charge and discharge. Energy charts track monthly, yearly, and 20-year capacity.

7.2.4 System setting

System settings include language selection (Chinese/English), time settings, device information (manufacturer, serial number, software/hardware versions, production date), and maintenance access (requires password).

7.2.5 Historical information

Access historical information, including common and serious faults. Fault details can be viewed by flipping through pages.

8 Operation

8.1 Power on steps

After installation and settings are inspected, the inverter can be started. Turn on PV, battery, and AC input micro breaks. Do not turn on the AC output switch until the system operates normally. Close the bypass switch for normal operation. Check screen sampling data and battery parameter settings. Ensure BMS and ATS are enabled if applicable. Check history information for faults. Turn the knob to 'on' and click 'on' on the LCD. Observe displayed data for abnormalities.

Warning: The bypass switch is for maintenance only and should not be used during normal operation.

8.4 Power off steps

Click the LCD shutdown button or turn the off-on knob to 'off'. Cut off DC switches (PV input and Battery input) and AC switches (AC input and AC output). Wait at least 5 minutes after power-off before proceeding with operations.

9 Routine maintenance

9.1 Regular maintenance

Regular maintenance is necessary to ensure the inverter's normal operation and service life due to environmental influences. Only qualified personnel should perform maintenance. Follow safety precautions, including disconnecting power, waiting 5 minutes, and ensuring electrical neutrality before working inside the cabinet.

9.1.1 Safety precautions

• Only qualified and authorized personnel can maintain the inverter.
• Do not leave screws, washers, or other metal parts inside the inverter.
• Even with circuit breakers open, internal connections may still be electrified.
• Disconnect all external connections and internal power supply before maintenance.
• Wait at least 5 minutes after stopping operation before proceeding.
• Ensure the inverter is electrically neutral inside.
• Make necessary grounding and short circuit connections.
• Use insulating material to cover electrified parts.

9.1.2 System maintenance

Tools required for maintenance include a camera-equipped phone, multimeter, thermometer, pen and paper, spanner/screwdriver, and thermal imager.

9.1.3 Relative operations

All maintenance operations must be performed with DC and AC sides disconnected, and after waiting at least 5 minutes to avoid electric shock. Only professional technicians familiar with the system should perform operations.

9.2 Waste disposal

Dispose of the inverter in accordance with environmental protection requirements and relevant laws and regulations.

10 Appendix

10.1 Specification

This section provides detailed specifications for ATESS HPS models, including battery voltage, PV MPPT voltage, inrush current, max output feedback overcurrent current, PV parameters, battery parameters, AC output parameters, transformer specifications, and LCD/communication interface details.

10.2 Atess Factory warranty

The warranty period is one year, unless otherwise specified in the contract. Customers must provide the invoice and date of purchase. ATESS is not responsible for warranty claims under specific circumstances, including products without ATESS logo, expired warranty, damage due to improper environment or installation, unauthorized modification, use of non-ATESS components, accidents, human factors, or force majeure.

10.3 Maintenance and inspection checklist for running system

A checklist is provided for recording inspection and maintenance of running systems, covering items like LCD display, history records, data transmission, fan operation, abnormal smells/sounds, and emergency stop button function.

10.4 Maintenance and inspection checklist for shutdown system

A checklist for shutdown systems includes checks for room cleanliness, rodent/insect presence, cable connections, grounding, external connections, cabinet moisture, dust screens, internal equipment condition, and safety signs.

10.5 EMS mode RS485 command

This section lists RS485 commands for EMS mode operations, including power on/off, EMS mode activation, DC-AC rectification, and PV power control. It also describes the RS485 instruction formula.