Copyright Statement
This manual is copyrighted by Alpha ESS Co., Ltd., and all rights are reserved. Without the written permission of our company, no organization or individual may extract or copy part or all of the content of this document without authorization, and may not disseminate it in any form. Unauthorized modification or disassembly of the system is strictly prohibited.
Please keep this manual safe and strictly follow all safety and operating instructions in this manual. Do not install or operate the system before reading this manual.
Notice
The products, services, or features you purchase are subject to the AlphaESS commercial contract and terms, and some of the products, services, or features described in this document may not be within the scope of your purchase or use. Unless otherwise agreed in the contract, AlphaESS makes no express or implied warranties regarding the content of this document.
Due to product version upgrades or other factors, the content of this document may be updated from time to time. This document is for guidance only and does not constitute any form of commitment. Please refer to the actual product for accuracy.
Preface
The StaX-M29.9/M30/M50 energy storage system has been developed by AlphaESS over many years and has been successfully applied in many fields. It is a high-tech product with excellent quality and stable performance that meets today's power supply needs.
This manual is intended to address product installation and usage issues. It provides detailed installation and usage information, including safety instructions, product introduction, installation, and user guidelines.
Symbols
The following symbols may appear in this document. Please note that they represent the following meanings:
Symbol | Description |
| Indicates potential risks that may cause system malfunctions or errors if not avoided. |
| Indicates moderate potential hazards that may lead to system damage or personal injury if not avoided. |
| Indicates high potential hazards that may result in death or serious injury if not avoided. |
| Supplementary explanation of key information in the main text. "Explanation" is not a safety warning information and does not involve personal, system, or environmental injury. |
Terminology
- Battery Management System (BMS)
Monitors the operational information of battery cells, battery packs, and system units (such as voltage, current, temperature, and battery protection parameters), and intelligently assesses the state of charge (SOC), state of health (SOH), and total energy output to ensure battery safety.
- Energy Management System (EMS)
Consists of data collection and monitoring systems and supports automatic power generation control, economic dispatch control, and power system status and safety analysis.
- Battery Energy Storage System (BESS)
A combination of series- and parallel-connected batteries and the BMS, used to connect the DC side of PCS.
- Energy Storage System (ESS)
A combination of a battery system and power conversion systems (PCSs) such as StaX-M29.9/M30/M50. An ESS can be used as an independent power source or be directly controlled by a monitoring system.
- Photovoltaic (PV)
A PV power system is a new type of power generation system that utilizes the photovoltaic effect of semiconductor materials in solar cells to directly convert solar radiation energy into electrical energy.
- On-Grid System
On-grid systems typically consist of PV strings, PCSs, battery systems, and the power grid. When the electricity generated by the PV strings is sufficient, the excessive electricity can be fed into the grid. When the electricity generated by the PV strings and battery system is insufficient, the grid can supply power to the load.
- Off-Grid System
Off-grid systems are suitable for areas without a grid or where the grid power is unstable. These systems typically consist of PV strings, energy storage inverters, battery systems, and generators. When the battery has sufficient energy, the load is powered by the PV system and the battery. If the battery energy is insufficient, the generator powers the load while charging the battery system.
Version Information
Version | Date | Content |
V01 | 2026.03.25 | New |
V02 | 2026.06.24 | Modify in accordance with R&D modification notice |
V03 | 2026.07.15 | 3.2 Scope of Delivery: Added length specifications for PCS and EMS communication cables 4. System Power-On and Power-Off: Added note that older versions are not equipped with a PCS switch 3.5.5.3 AC Aux Power Connection: Added requirement to connect auxiliary power cable if ambient temperature falls below 0°C 3.5.4.2 Meter Communication Connection: Added instructions for direct meter wiring |
V04 | 2026.08.14 | 3.2 Scope of Delivery: Revise HV-BOX illustrations; add length specifications for battery power cables contained in the accessory kit. 1.6.4 Space Requirements: Update two illustrations, add requirement: the clearance in front of the inverter shall be no less than 1000 mm. 3.5.4.2 Meter Communication Connection: Add configuration instructions for direct-connected electricity meters. 3.5.5.3 AC Aux Power Connection: Add statement that heating films are powered by auxiliary power supply. 3.5.3 Cover Opening & Removal: Update illustrations and text content; the cover does not need to be disassembled. 3.6.1 Communication Wiring: Add photos of DIP switches. 3.6.2 Electrical Wiring: Update the parallel connection diagram. 3.5.4.2 Meter Communication Connection: Add configuration instructions for household electricity meters. |