This document describes the Growatt AXE 5.0L Battery System, a residential energy storage unit designed to enhance energy independence and optimize solar power utilization. The system is a modular, high-voltage battery pack that can be expanded to meet various energy demands, from small residential setups to larger multi-cluster installations.
Function Description
The AXE 5.0L is an energy storage unit composed of electrochemical cells, a switch button, a battery management unit, power and signal terminals, and mechanical parts. It stores excess solar energy generated during the day for use at night or during periods of low solar irradiance, effectively maximizing self-consumption of solar power. The system communicates with a Power Conversion System (PCS) via CAN, enabling comprehensive monitoring and control. This includes voltage, current, and temperature detection of both single cells and the entire PACK, as well as protection against over-alarm, undervoltage, overvoltage, overcurrent, over-temperature, and under-temperature conditions.
The system is designed for parallel connection, allowing for easy expansion. A single cluster can connect up to 10 batteries in parallel, and up to 8 clusters can be connected to expand the capacity and power of the energy storage system. This modularity ensures that the system can be tailored to specific energy needs and scaled up as requirements change.
Important Technical Specifications
The AXE 5.0L is a 51.2V battery module with a nominal capacity of 100Ah/5.0kWh. It supports a rated charge/discharge current of 60A and a maximum charge/discharge current of 80A. The maximum charge/discharge power is 4kW, with a rated charge/discharge power of 3kW. The battery type is Cobalt-free Lithium Iron Phosphate (LFP), known for its safety and long cycle life.
The operating temperature range is 0°C to 50°C, with a recommended operating temperature of 15°C to 30°C. For storage, the temperature range is -20°C to +50°C for 7 days, -20°C to +40°C for 6 months, and -20°C to +20°C for 12 months, with humidity between 5% and 85% RH. The system has an ingress protection rating of IP20.
The dimensions of a single module (W/D/H) are 650350140 mm, and it weighs 40kg. The system is designed for floor-standing installation.
For larger configurations, the manual provides specifications for systems with up to 10 parallel battery modules and up to 8 clusters. For example, an AXE 10.0L-C1/X1 system (2 batteries in parallel) has a nominal capacity of 200Ah/10.0kWh, a rated charge/discharge current of 120A, and a maximum charge/discharge power of 7.6kW. The largest configuration, AXE 50.0L-C1/X1 (10 batteries in parallel), offers a nominal capacity of 1000Ah/50.0kWh, a rated charge/discharge current of 120A, and a maximum charge/discharge power of 7.6kW.
Usage Features
- Modular Design: The AXE 5.0L's modularity allows for flexible system sizing. Users can connect up to 10 batteries in a single cluster and up to 8 clusters in parallel to achieve a maximum capacity of 50.0kWh.
- Easy Installation: The system is designed for floor-standing installation. The manual provides detailed instructions for connecting multiple batteries in parallel and multiple clusters, including wiring diagrams for communication and power.
- Monitoring and Protection: The integrated Battery Management System (BMS) continuously monitors various parameters such as voltage, current, and temperature, providing comprehensive protection against overcharge, over-discharge, overcurrent, and over/under temperature conditions.
- LED Indicators: The system features LED indicators (RUN, ALM, SOC) that provide visual feedback on its operational status, including running status, alarm conditions, and State of Charge (SOC). A detailed table explains the meaning of different LED states and colors.
- Power On/Off Procedure: A clear procedure is outlined for powering on and off the battery system, including connecting the battery to the PCS, closing the breaker, and pressing the power button.
- Emergency Response: The manual includes guidelines for handling emergencies such as leakage, fire, and wet packs, emphasizing safety precautions and contact with Growatt or a distributor for technical assistance.
Maintenance Features
- Regular Checks: The manual recommends regular checks of the PACK package, power, and deliverables to ensure proper installation and identify any damage or missing parts.
- PACK Replacement: Instructions are provided for replacing a PACK, including wearing safety gloves, disconnecting the power, removing the safety part, lifting the PACK upward, and installing a new PACK.
- Troubleshooting Suggestions: A table of error indications, descriptions, causes, and suggested actions is provided to assist users in troubleshooting common issues such as discharge undervoltage protection, charge overvoltage protection, communication failures, and internal CAN communication failures.
- Battery Storage: Specific guidelines for battery storage conditions, including temperature and humidity ranges, are provided to ensure the longevity and performance of the battery modules.
- Parallel Connection Management: When mixing old and new batteries in parallel, it is crucial to ensure that all batteries are from the same batch, same model, and same manufacturer. The manual specifies that newly added batteries must be within the shelf life of 6 months.
- Firmware Updates: The system supports firmware updates, which can be performed by qualified technicians to ensure optimal performance and compatibility.
- Safety Precautions: The manual emphasizes strict adherence to safety precautions during installation and maintenance, including wearing personal protective equipment (PPE) and avoiding contact with live parts. It also highlights the importance of professional installation by trained technicians.
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