TW-SK-HV Battery System

Key Features

• Flexible capacity options, 10.25kWh to 51.2kWh
• Excellent safety of cobalt-free LiFePO4 battery
• Easy installation with modular and stacked design
• Remote firmware upgrade

HVM High Voltage Battery Characteristics

• Safe, reliable, and complete protection functions with BMS intelligent protection.
• Brand new & grade A LiFePO4 battery with excellent safety performance; metal shell, waterproof and explosion-proof.
• Built-in fire extinguishing device, automatically handles thermal runaway conditions beyond early warning.
• Modular stacking design for easy expansion, up to 5/10 battery packs can be connected in series.
• Capacity: 5.12kWh per module.
• Compatible with various energy storage inverters on the market.
• Supports UPS function, providing 24-hour uninterrupted power supply with full power continuous output guarantee.
• Energy saving, environmental protection, and long life: battery usage rate up to 95% or more, deep cycle capability with over 3500 cycles.
• Multifunctional design with LED power display, beautiful appearance, and ON/OFF switch control output.

1 Introduction

This document introduces the product information, installation wiring, configuration testing, troubleshooting, and maintenance content of the battery system. Users are advised to carefully read this manual, understand product safety information, and familiarize themselves with the product's functions and features before installation and use. The document may be updated periodically.

1.1 Applicable Products

This document applies to the following models:

• TW-SK-HV10.24
• TW-SK-HV15.4
• TW-SK-HV20.5
• TW-SK-HV25.6
• TW-SK-HV30.7
• TW-SK-HV35.8
• TW-SK-HV41.0
• TW-SK-HV46.1
• TW-SK-HV51.2

1.2 Applicable Personnel

Only professionals familiar with local regulations, standards, electrical systems, and who have undergone professional training are qualified to operate this product.

1.3 Symbol Definition

Symbols are used to highlight important information:

• [Danger]: Indicates a highly potential danger that could result in death or serious injury.
• [Warning]: Indicates a moderate potential danger that could lead to death or serious injury.
• [Caution]: Indicates a low potential danger that may result in moderate or mild injury.
• [Notice]: Emphasizes content, providing tips or tricks for optimizing product usage.

1.4 Version Record

V1.0 2024-02-21: First release.

2 Safety Precautions

Always comply with the safety precautions in this document when operating the equipment.

[Notice] The equipment is designed and tested according to safety regulations. However, as electrical equipment, safety instructions must be followed. Improper operation may cause serious injury or property damage.

2.1 General Safety

[Notice] Document content may be updated periodically. It cannot replace safety precautions on product labels. All descriptions are for guidance only.

• Read this document carefully before installation.
• All operations must be performed by qualified electrical technicians.
• Use insulated tools and wear personal protective equipment (PPE) like static gloves, wristbands, and anti-static clothing.
• Equipment damage or injury due to improper installation or configuration is not the manufacturer's responsibility.

2.2 Battery Safety

[Danger] The system operates at high voltage. Ensure the equipment is powered off before operation to avoid electric shock. Strictly follow all safety precautions and signs.

• Use only approved inverters. Contact the manufacturer for a matching list.
• Do not disassemble, modify, or repair without authorization.
• Do not hit, pull, drag, squeeze, step on, or place the battery in fire.
• Avoid high-temperature environments and direct sunlight (fire risk above 60°C).
• Do not use if the battery or control box has obvious defects, cracks, or damage.
• Transport battery packs with trained personnel, ensuring balance to prevent falls.
• Battery equipment is heavy; use appropriate personnel for handling.
• Contact after-sales service if the battery cannot start to prevent permanent damage.
• Do not move the system during operation. Contact after-sales for replacement or additions.

[Caution] Ensure the battery system is not damaged during transportation and storage.

Transportation must be carried out by trained professionals. Ensure equipment is placed firmly and not tilted. Cables in high-temperature environments require at least 30mm clearance from heat sources. Similar cables should be tied together; different types should be at least 30mm apart.

Logo Description

• [Danger Symbol]: Potential danger during operation. Take protective measures.
• [High Voltage Symbol]: High voltage during operation. Ensure equipment is powered off.
• [Explosion Risk Symbol]: Use equipment reasonably; risk of explosion in extreme cases.
• [Corrosive Electrolyte Symbol]: Contains corrosive electrolyte. Avoid contact with leaked substances.
• [Flammable Materials Symbol]: Batteries contain flammable materials. Be careful of fires.
• [No Open Flames Symbol]: Keep away from open flames or ignition sources.
• [Keep Away From Children Symbol]: Keep away from areas accessible to children.
• [No Lifting When Connected Symbol]: Do not lift the device after connection or during operation.
• [No DC Plug/Unplug Symbol]: Do not directly disconnect or plug DC terminals during operation.
• [Circular Regeneration Flag]: Circular regeneration flag.
• [Manual Reading Symbol]: Read the product manual carefully before operation.
• [PPE Symbol]: Wear PPE during installation, operation, and maintenance.
• [CE Mark]: CE certification mark.
• [Grounding Symbol]: Protect the grounding wire connection point.

2.3 Emergency Measures for Emergency Situations

Battery Electrolyte Leakage

If electrolyte leaks, avoid contact. Electrolytes are corrosive. In case of contact:

• Inhalation: Evacuate and seek medical assistance.
• Eye Contact: Rinse eyes with water for 15 minutes and seek medical assistance.
• Skin Contact: Wash with soap and water and seek medical assistance.
• Accidental Ingestion: Induce vomiting and seek medical assistance.

Fire Breaking Out

At temperatures exceeding 150°C, there is a risk of ignition and toxic gas release. Use carbon dioxide, Novac1230, or FM-200 fire extinguishers. Do not use ABC dry powder extinguishers. Firefighters require protective clothing and self-contained breathing apparatus.

3 Product Introduction

3.1 Product Introduction

Functional Overview

The battery system comprises battery modules and control boxes, storing and releasing electricity for photovoltaic energy storage systems. Input and output ports are high-voltage direct current.

Model Description

This document applies to the following battery models:

• TW-SK-HV10.24
• TW-SK-HV15.4
• TW-SK-HV20.5
• TW-SK-HV25.6
• TW-SK-HV30.7
• TW-SK-HV35.8
• TW-SK-HV41.0
• TW-SK-HV46.1
• TW-SK-HV51.2

Model Meaning

The model number TW-SK-HV 10.24 breaks down as:

• ① Company Code: Toway
• ② Placement Type: SK: Stacked
• ③ Product Characteristics: HV: High voltage battery
• ④ Available Power: Indicates the available power in kWh (e.g., 10.24kWh for TW-SK-HV10.24).

Description of Available Power

[Notice] The system supports expansion up to 9 battery modules. Expansion conditions must be strictly followed. Contact your dealer or manufacturer for details. Improper expansion may cause faults. Actual height may vary slightly.

3.2 Application Scenarios

[Notice] The system supports clustering up to 8 battery systems. Ensure consistent available power for each system. Circuit breakers must comply with local laws and regulations. Recommended specifications: Rated voltage ≥ 750V.

• Single cluster: Inverter-battery switch rated current ≥ 50A.
• Two clusters: Inverter-battery switch ≥ 100A; battery-battery switch ≥ 50A.
• Three or more clusters: Inverter-battery switch ≥ 125A; battery-battery switch ≥ 50A.

Diagram Description: A system diagram shows PV string, Inverter, Smart meter, Battery switch, AC circuit breaker, CT, Electricity meter, Grid, and Load, with multiple Battery Systems connected.