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 Warranty Policy

Warranty & Maintenance Documentation

Clear warranty documentation gives you complete confidence in every BESS system.

WARRANTY POLICY FOR BATTERY ENERGY STORAGE SYSTEM (BESS)

Document Code: CS-HM-00001-V1.0

1. General Information

Item Details
Document Title WARRANTY POLICY FOR BATTERY ENERGY STORAGE SYSTEM
Document Code CS-HM-00001-V1.0
Applicable Department After-Sales Service Center
Date of Issue August 18, 2025
Version V1.0
Prepared by Director of After-Sales Service Center
Reviewed by Deputy CEO of Sales & Marketing
Approved by Chief Executive Officer

2. Purpose

This warranty policy is established to ensure customer rights, maintain performance and reliability of the Battery Energy Storage System (hereinafter referred to as “Product”) during its operation.
Through clear commitments regarding warranty duration, coverage, conditions, and limitations, this policy helps customers:

  • Enhance confidence and peace of mind when investing in the Product;

  • Optimize operating costs with the benefit of replacement, repair, and technical support in accordance with manufacturer standards.

3. Scope of Application

This policy applies to all Products supplied and installed by GG Industries (GGI) within the territory of Vietnam, including:

  • GG-EL-125/261-G400

  • GG-EL-250/836-G400

  • GG-EL-400/836-G400

4. Definitions / Abbreviations

No. Term / Abbreviation Description
1 BESS Battery Energy Storage System
2 BMS Battery Management System
3 Battery Cell The fundamental electrochemical energy storage unit capable of generating and storing electrical energy. Multiple cells are connected to form a Battery Module or Battery Pack to increase capacity and voltage.
4 DOD Depth of Discharge
5 EMS Energy Management System
6 Warranty Replacement Parts Components or assemblies provided free of charge by the manufacturer during the valid warranty period and scope.
7 Repair Replacement Parts Components used for troubleshooting, maintenance, or upgrades outside the warranty scope.
8 Battery Module An assembly of multiple cells connected in a defined configuration to increase voltage and capacity. It serves as an intermediate unit between Cells and Packs.
9 Battery Pack A combination of multiple Battery Modules assembled to achieve the desired voltage and capacity, integrated with BMS, sensors, and protective mechanisms.
10 FSS Fire Suppression System
11 PCS Power Conversion System
12 PDU Power Distribution Unit
13 RH Relative Humidity
14 RMA Return Merchandise Authorization
15 SOC State of Charge
16 SOH State of Health
17 TMS Thermal Management System
18 Charge/Discharge Rate (P-Rate) Indicates the current rate of charge/discharge relative to the nominal capacity of the battery. Higher P-rate indicates faster charge/discharge.

5. Policy Content

In case of any inconsistency between the Contract, User Manual, and this Warranty Policy, the terms related to product warranty shall follow the priority order stated above.

5.1 Warranty Duration and Coverage

5.1.1 Product and Component Warranty

  • Warranty period: 24 months (2 years) from the date of commissioning and handover.

  • Warranty coverage: All equipment and associated components, including PCS, BMS, EMS, TMS, mechanical parts, cables, electrical devices, protection devices, and fire protection equipment; excluding consumables and parts subject to natural wear and regular replacement (such as filters, coolant, fans, surge protectors, fuses, etc.).

5.1.2 Battery Pack Warranty

  • Warranty period: 60 months (5 years) from commissioning and handover date.

  • Coverage: Material defects or manufacturing faults affecting storage performance and battery lifespan.

5.1.3 Performance Warranty

Product Model Guaranteed Performance
GG-EL-125/261-G400 SOH ≥ 70% after 8,000 cycles under 0.5P, 25 ± 3°C, DOD 95%
GG-EL-250/836-G400 SOH ≥ 70% after 7,000 cycles under 0.3P, 25 ± 3°C, DOD 95%
GG-EL-400/836-G400 SOH ≥ 70% after 7,000 cycles under 0.5P, 25 ± 3°C, DOD 95%

5.1.4 Warranty Start Date

The warranty period starts from the date of commissioning and handover.
If the product is delivered to the site but installation and handover are delayed for more than 180 days due to customer reasons, the warranty period will start from the delivery date.

5.2 Replacement Parts

  • Replacement shall be made at the component level.

  • GGI reserves the right to determine the form and condition of replacement parts, ensuring equivalent performance to the original components.

  • All replacement parts are new and genuine.

  • Removed faulty parts become GGI property.

  • Repaired or replaced components will inherit the remaining warranty period of the product or six (6) months from replacement date, whichever is longer.

5.3 Warranty Conditions

  • All products must be supplied by GGI or an authorized partner.

  • Product serial numbers must match the registered warranty records without alteration.

  • For uninstalled products, storage conditions must meet:

    • Temperature: −30°C ~ 60°C (recommended 10°C ~ 50°C)

    • Humidity: 5 % – 80 % RH (recommended 40 % – 50 %)

    • Storage area: clean, ventilated, protected from sunlight and rain

    • Keep ≥ 3 m away from flammable, explosive, or corrosive substances

    • Storage site must be ≥ 500 m away from coastline

  • Product failures must be proven to originate from manufacturing or technical faults.

  • Installation, operation, and maintenance must follow GGI technical manuals.

  • All warranty claims must be filed via RMA Form (Return Merchandise Authorization).

  • Warranty rights are transferable only if the product remains at its original installation site.

5.4 Warranty Limitations

The warranty does not cover damage or degradation caused by:

  • Non-manufacturing or handling errors not attributable to GGI.

  • Incorrect installation, operation, or maintenance.

  • Interrupted EMS connection preventing fault analysis.

  • Unsuitable installation site (humidity, salt corrosion, ventilation failure, etc.).

  • Locations within 500 m of the coast (warranty void) or between 500 m–2 km (coverage defined in contract).

  • Normal wear, surface imperfections, or cosmetic damage not affecting performance.

  • Unauthorized disassembly, modification, or vandalism.

  • Misuse, overload, or improper charge/discharge rate.

  • Force majeure: overvoltage, lightning, flood, fire, earthquake, pests, rodents, etc.

  • Failure to maintain or operate in accordance with GGI recommendations.

5.5 Products Without EMS Connection

If the customer does not use the EMS service, preventing real-time monitoring and data logging, warranty duration and coverage shall be agreed upon in the contract.

5.6 Warranty Claim Procedure

  • The customer must complete and submit the RMA Form within 30 days of incident occurrence.

  • GGI may perform remote diagnosis and troubleshooting.

  • For offline systems, customers must conduct onsite checks per RMA instructions.

  • Customers must provide access and safety support for GGI technicians.

  • GGI is not liable for delays or additional damage resulting from customer inaction.

5.7 EMS Software Updates (Cloud & Mobile)

  • During the warranty period, GGI ensures proper system functionality.

  • Software is provided “as-is”; GGI does not guarantee uninterrupted or error-free operation.

  • Customers are entitled to free periodic software updates during the warranty period.

5.8 Post-Warranty Service

After warranty expiry, or for cases outside warranty scope, GGI may charge:

  • Onsite service fees: travel, labor, installation, and troubleshooting.

  • Spare parts/material costs: including logistics or administrative fees.

  • Logistics fees: for shipment of defective or repaired items.

5.9 Disclaimer of Liability

  • This policy applies to products supplied and installed by GGI or its contractors.

  • GGI’s liability shall not exceed the residual product value at the time of claim.

  • GGI shall not be liable for:

    • Indirect or consequential damages (lost revenue, profits, data).

    • Software damage or data loss.

    • Punitive or incidental damages.

  • Exceptions apply only in cases of proven gross negligence, intentional misconduct, or injury caused by product defect.

5.10 Contact Information

Warranty Center – GG Industries JSC
Address: Lot CN-01.4B, Industrial Park No. 05, Xuan Truc Commune, Hung Yen, Vietnam
Hotline: +84-98-339-1386
Email: service@ggp.vn
Website: https://ggp.vn/en/service/

  Frequently Asked Questions

We are ready to support you

BESS helps reduce electricity costs, maintain power stability and continuity, protecting machinery and equipment.

Typical customers of GG Industries can save up to ~10% of annual electricity expenses, with a payback period of 2 to 5 years, depending on the specific project scale and operating conditions.

The BESS charges during off-peak and normal-rate hours and discharges during peak hours, when electricity prices are 1.8 to 2.8 times higher.

Thanks to this mechanism, BESS has been widely adopted in developed countries to stabilize the power grid and optimize energy costs for industrial and commercial facilities, ensuring both economic efficiency and operational reliability.

BESS technology has been continuously improved and now meets most global safety standards such as IEC (Europe) and UL (USA).

BESS uses Lithium Iron Phosphate (LFP) battery cells, which offer high thermal stability and fire resistance, ensuring superior safety. According to global data, over 360 GWh of BESS capacity has been installed in developed countries, with an extremely low incident rate, confirming its reliability and safety in practical operation.

 

According to GG Industries’ warranty policy, the battery modules are covered for 5 years, while other components are warranted for 2 years.

The average annual degradation rate is around 3%, and the BESS can operate effectively for 12 to 20 years, depending on the number of charge and discharge cycles and the specific application conditions.

Currently, there are no specific fire safety (PCCC) or electrical utility regulations issued in Vietnam for BESS installations. However, GG Industries’ systems are designed in full compliance with IEC international safety standards, which are being referenced by local authorities for future regulation. BESS installation does not require formal approval from the local power utility (EVN), but it is recommended to submit a written notification to EVN regarding the integration of a BESS unit into the facility’s electrical system

There are two leasing models available.

  1. Rent-to-Own: Short-term leasing (1–3 months) allows customers to test performance and KPIs before deciding to purchase the system.

  2. Battery-as-a-Service (BaaS): Long-term leasing throughout the entire product lifecycle, where benefits and costs are shared based on the specific characteristics of each project (typically ≥30%).

These flexible financial models help businesses optimize investment efficiency, reduce upfront costs, and access GGI’s advanced BESS technology with minimal capital commitment.

 

GGI partners with banks and financial institutions to support customers with financing options.
Several banks are currently evaluating the BESS model to recognize BESS systems as eligible collateral. At present, customers can use other assets as collateral to secure financing for their BESS projects, with loan-to-value ratios of up to 70%.
This collaboration helps clients reduce upfront investment pressure while enabling them to access advanced, sustainable energy storage solutions efficiently and flexibly.

The Energy Management System (EMS) serves as the central intelligence of the BESS solution.
In addition to system control and optimization, the EMS enables users to monitor key performance indicators, energy savings, and fault alerts through a dedicated mobile application on Android and iOS. This allows real-time visibility and smart management of the entire energy storage system, ensuring efficient and reliable operation.

The appropriate battery capacity is calculated based on peak-hour energy consumption and the operating schedule of each business.

Customers should provide: (1) the electricity bill/statement from EVN or the local distributor, (2) an hourly load profile for about one representative week, and (3) a single-line electrical diagram.

The maintenance procedure is divided into two levels:

  • Regular maintenance (monthly or quarterly) and

  • Comprehensive maintenance (annually).

Each maintenance session takes 1–4 hours, depending on the system size, and can be scheduled outside peak hours or on non-working days to avoid disrupting production operations.

GGI is headquartered in Industrial Park No.5, Ân Thi, and operates a fully integrated value chain — from market research, R&D, production, and brand development to sales and after-sales service.
The company is also committed to product lifecycle responsibility, including collection and recycling of BESS units after end-of-life, ensuring environmental compliance and sustainable operations.

GGI is a Vietnamese company founded by three pioneers with extensive experience in the battery and energy storage industry.
The company is also funded by an investor based in Dubai, enabling GGI to strengthen its technological capabilities, expand production capacity, and accelerate the development of high-quality BESS solutions for both domestic and international markets.

Yes, because GG Industries is committed to delivering a comprehensive solution and turnkey service package to its customers.
This approach ensures that clients receive end-to-end support — from system design, installation, and commissioning to operation, maintenance, and long-term service — providing convenience, reliability, and optimal performance throughout the entire project lifecycle.

The warranty policy covers up to 5 years for battery modules and 2 years for other BESS components for  GGI C&I BESS. With GGI BESS residential, the warranty policy covers up to 10 year.
GG Industries also offers extended warranty packages tailored to each product line and customer’s specific requirements, ensuring long-term system reliability and optimized maintenance support throughout the lifespan of the solution.

Each BESS is equipped with a remote management and diagnostic system that can detect and alert faults in real time.
In cases requiring on-site intervention, GG Industries dispatches technical engineers within 4 to 12 hours, ensuring timely troubleshooting, minimal downtime, and continuous, reliable system operation.