Amid the global wave of green energy transition and the overseas expansion of China Smart Manufacturing, every safe and reliable battery product is backed by a rigorous, internationally recognized scientific testing system. Guangdong ESTL Technology Co., Ltd. stands as a key builder and guardian of this system.

Driven by the dual forces of the reshaping global industrial chain and carbon neutrality goals, the battery and new energy industry has become the core of national strategic competitiveness. Product quality and safety—especially compliance with diverse global market access standards—are the keys to breaking industry barriers and winning global trust.

As a national high-tech enterprise deeply rooted in the battery testing and certification field, Guangdong ESTL Technology Co., Ltd. is more than a third-party testing institution: it is the issuer of the "Technical Passport" for China’s new energy products to go global, and a critical infrastructure guaranteeing the safety and reliability of the global supply chain.

From Anci to GTG: Group Upgrading & National Strategic Layout

Our development trajectory aligns with the professionalization and scale-up of China’s testing and certification industry. The company traces its roots to Anci Testing Group, founded in 2012. With the rapid expansion of business depth and breadth, the group completed a strategic upgrade on July 1, 2022, and was officially renamed GTG Testing Group—a pivotal shift from a single brand to a diversified, professional business group operation model.

GTG Testing Group now boasts a clear Strategic Business Unit (SBU) structure, with each subsidiary focusing on specialized fields and collaborating to serve the global market:

• Guangdong ESTL Technology Co., Ltd.: The core business unit of the group, specializing in the full-chain testing and certification of batteries, energy storage systems, and electric vehicle complete machines & components. It is the group’s flagship laboratory in the new energy sector.
• Guangdong GTG Global Technology Co., Ltd.: Focuses on domestic and international certification of wireless communication equipment, information technology devices and RF products, covering radio type approval, CE-RED, FCC, etc.
• Guangdong GTG Testing Technology Co., Ltd.: Mainly engaged in safety and energy efficiency certification of electrical products such as home appliances, lighting fixtures and power supplies (CCC, CE-LVD, ERP, etc.).
• Other professional subsidiaries: Covering network security, PV-storage-charging integration, environmental reliability, EMC and other key testing fields.

Currently, GTG Testing Group is actively advancing its national development strategy, planning to establish or jointly operate a laboratory network in major first- and second-tier cities and key industrial clusters across China. This layout aims to be close to customers’ industrial chains, shorten service radius, and build a technical service capability covering the whole of China and radiating the globe—providing localized, one-stop international compliance solutions for Made in China.

Core Capabilities: Matrix-Style Testing & Certification Services Covering the Entire Industrial Chain

As the group’s flagship in the new energy sector, Guangdong Energy Storage Testing Technology Co., Ltd. has built an all-round, matrix-style service capability, with its core business scope as follows:

Technical Cornerstone: Evolving Hardware Strength & Authoritative Qualifications

The credibility of a testing institution is rooted in the depth and breadth of its technical heritage. We adhere to the development philosophy of "Core-driven, Forward-looking Investment" to ensure our technical capabilities always lead market demand.

Continuous Expansion of Infrastructure

Our testing base in Dongguan Songshan Lake has evolved into a comprehensive laboratory complex covering over 30,000 square meters. To meet the explosive market demand, the laboratory area and production capacity are under continuous planning and expansion.

Equipment Synced with International Standards

The laboratory is equipped with more than 2,000 sets of internationally advanced testing instruments, including large-scale charge-discharge test systems, high-precision calorimeters, three-comprehensive vibration test chambers, explosion-proof high-altitude low-pressure test chambers, etc. We regularly introduce cutting-edge testing equipment from Europe and the US to ensure our test methods and accuracy are in sync with the world’s top laboratories.

Ever-Heightening Qualification Barriers

As an accredited laboratory operating in strict accordance with the ISO/IEC 17025 system, we have built a qualification network covering the world’s mainstream markets:

• Domestic Authority: CNAS (China National Accreditation Service for Conformity Assessment), CMA (Metrology Accreditation for Inspection and Testing Institutions), designated testing laboratory of CQC (China Quality Certification Center).
• International Recognition: IECEE CBTL (IEC System for Conformity Testing and Certification of Electrical Equipment) laboratory, UL TPTDP (Test Program for Third Party Data Program) recognized witness-free testing laboratory, and long-term cooperation with TÜV Germany, Eurofins Belgium, etc.
• Platform & Industry-Specific Approval: Amazon SPN service provider, Temu recognized laboratory, accredited air transport appraisal institution of Zhengzhou Xinzheng International Airport, UN38.3 recognized laboratory of China Southern Airlines.

Capability for Major & Complex Projects

We actively participate in the testing and certification of cutting-edge and major industry projects, such as:

• Providing a full set of IEC 62619 and UL 9540A certification for global leading energy storage system integrators—covering from battery cells to container-level energy storage systems, including complex thermal runaway spread assessment.
• Undertaking EU CE and E-Mark certification projects for complete electric micro-vehicles and e-motorcycles of multiple automakers, covering safety, EMC and other dimensions.
• Delivering one-stop "Global Passport" solutions covering UL, CB, KC, PSE and other multi-country certifications for consumer battery brands entering the international high-end market.

Mission-Driven: Empowering the Industry with Technology, Connecting the World with Professionalism

"Making the World Safer, Making Life Better" is the lofty mission of GTG Testing Group, and the daily practice of every engineer at Guangdong Energy Storage Testing. We firmly believe that rigorous scientific testing is the last line of defense for product safety and the cornerstone of trade mutual trust.

By building a technical service ecosystem covering the entire life cycle of R&D, production, launch and overseas expansion, Guangdong Energy Storage Testing Technology Co., Ltd. is committed to becoming an indispensable value partner for the new energy industry. We not only empower product compliance, but also drive technological innovation and quality improvement at the front end of the industrial chain through data feedback.

In our laboratories by the Songshan Lake, temperature chambers simulate extreme climates from the Arctic night to the equatorial noon; vibration tables reproduce the bumps of long-distance transportation; precision instruments continuously "listen" to the tiniest "health signals" of batteries. Every rigorous test, every authoritative report, adds certainty and safety to the road of global energy transition.

With science as the yardstick and professionalism as the bridge, Guangdong Energy Storage Testing Technology Co., Ltd. guards the safety boundary of energy innovation, and empowers Chinese wisdom and manufacturing to step steadily into every corner of the world.

Contact Us

• Mobile: +86 13925598091
• Email: net03@gtggroup.com
• Official Website: www.gdestl.com
• Landline: 0769-85075888 Ext. 6617
• Address: Jinbaisheng Industrial Park, Zongbu 2nd Road, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province, China