Custom Lithium Ion Battery Makers Suppliers & Exporters

Shenzhen Grenergy Technology Co., Ltd. — OEM & ODM Industrial Solutions

1. The Global Revolution in Custom Lithium-Ion Battery Manufacturing

As the world transitions to a decarbonized, decentralized grid and high-efficiency mobility, standard battery solutions no longer suffice. Custom lithium-ion battery makers sit at the nexus of this transformation, providing tailored energy solutions across automotive, commercial, marine, and grid applications.

Decarbonization Demands

Global net-zero mandates are forcing industrial fleets, heavy-duty equipment, and residential grids to replace internal combustion engines and legacy lead-acid systems with highly efficient Lithium Iron Phosphate (LiFePO4) systems.

Specialized Voltages

Different industrial applications require custom-tuned footprints and specific voltages, from 12.8V setups for leisure RVs to 51.2V residential microgrids and high-voltage 76.8V modules for light electric vehicles.

Compliance & Security

Uncompromising safety certifications (UL, UN38.3, CE, PSE) and complete system validation with dynamic Battery Management Systems (BMS) protect hardware assets against extreme thermal runaways.

Understanding Lithium Chemistry Preferences: LFP vs NCM

In modern industrial applications, Lithium Iron Phosphate (LiFePO4) has largely surpassed Nickel Manganese Cobalt (NCM) for stationary energy storage systems (ESS) and utility transport due to its superior thermal stability, extended cycle life (typically >4000 to 6000 cycles at 80% DoD), and ecological sourcing (free of cobalt and nickel).

About Grenergy

Shenzhen Grenergy Technology Co., Ltd.

Established in 2010, Shenzhen Grenergy Technology Co., Ltd. is a high-tech enterprise specializing in R&D and manufacturing lithium batteries, energy storage systems, power batteries, battery management systems, and all-in-one solutions. With a strong commitment to technological innovation, Grenergy has become a leading provider of energy solutions for various applications worldwide.

By designing and constructing custom power configurations, we help global clients bypass the performance bottlenecks of off-the-shelf options. Whether it’s optimizing form factors for tight spatial constraints or implementing high-C-rate discharge thresholds for industrial power equipment, our engineering division turns specialized blueprints into high-performance realities.

Grenergy Custom Battery R&D Center

Company History and Brand Story

Since its establishment, Grenergy has focused on the development of sustainable energy solutions to meet the growing demand for efficient, reliable, and eco-friendly power systems. With over 10 years of expertise, Grenergy has developed a diverse product portfolio, including Lead-acid replacement lithium batteries, Wall-mounted power walls, Portable power stations, Mobile home energy storage systems, Trolley box portable power stations, and much more. We are committed to enhancing energy efficiency while reducing environmental impact.

Our core values include integrity, innovation, and customer satisfaction, which have been the foundation of our growth. Grenergy’s history is one of continuous improvement and dedication to providing advanced energy storage solutions to businesses and individuals globally.

Grenergy Assembly Line Floor

Data-Driven Insights: Scale & Quality Control

Grenergy’s products support various OEM and ODM customized services, allowing us to tailor solutions that meet specific client needs. With nearly 10,000 square meters of production space and a team of 200 highly skilled professionals, we are equipped to deliver high-quality products at scale.

10K+
Production Area (SQM)
200+
Skilled Professionals
10+
Years of R&D Excellence
$3M
USD Product Insurance

International Certifications & Risk Protection

Over the years, we have consistently met international industry standards, earning certifications such as ISO9001, ISO14001, ISO45001, UL, CE, FCC, PSE, and UN38.3.

We also provide third-party product liability insurance worth $3 million USD for all products, ensuring our global clients can trust our reliability and commitment to service excellence. This level of risk management offers peace of mind to developers and operators building massive grid infrastructures or complex machinery.

Grenergy Quality Testing Instruments

Brand Storytelling

From the beginning, Grenergy’s mission has been to empower the world with cutting-edge energy storage solutions. We believe in a future where renewable energy is the primary power source, and our products are designed to make this future a reality. Through decades of research and development, we’ve become a trusted name in the energy storage sector, helping companies transition to more efficient, sustainable energy practices.

BMS Integration Capability: Each pack custom-built at Grenergy is integrated with a proprietary intelligent BMS that tracks cell voltages, balanced charging rates, internal resistance, and temperatures dynamically. This ensures that the custom packs operate optimally throughout their entire multi-decade lifespan.

Grenergy Advanced Pack Assembly

The Edge of China's Battery Supply Chain

Shenzhen's manufacturing ecosystem provides an unparalleled advantage. Located in the core of the global electronics capital, Shenzhen Grenergy accesses tier-1 raw cells, advanced structural parts, and software engineers in record time. This localized ecosystem dramatically lowers research and development costs while compressing production lead times compared to Western assembly facilities.

Additionally, the close proximity to global shipping ports in Shenzhen and Hong Kong allows for optimal logistics handling, direct compliance shipping of hazardous class 9 battery goods, and efficient port transit for large-volume ocean container deliveries.

Grenergy Shipping Logistics Center

Partners and Collaborations

We are proud to have partnered with some of the world’s leading organizations and technology providers. These collaborations help us bring the latest advancements in energy storage and management systems to market, providing our clients with the most efficient and innovative solutions available.

By working with top-tier silicon and microchip makers, we construct robust BMS units capable of CANbus, RS485, and Modbus communication protocols, facilitating easy integration with well-known hybrid solar inverters (such as Victron, Growatt, Deye, and SMA).

Grenergy Engineering Collaborations

Customer Testimonials & Case Studies

Don’t just take our word for it—our clients trust us to provide safe, high-performance energy storage systems that meet their needs. With global customers from various industries, including renewable energy, manufacturing, and transportation, we have built a reputation for delivering reliable, top-quality products.

From extreme off-grid outposts in northern climates relying on our winterized insulated batteries to heavy logistics fleets optimizing warehouse runtime using our rapid-charging industrial vehicle packs, Grenergy ensures zero downtime operations.

Grenergy Global Delivery Operations

Deep Dive: Localized Applications for Custom Battery Packs

Every market segment demands a unique combination of operating voltage, thermal limits, weight limits, and ingress protection (IP). Our custom solutions satisfy these specialized domains globally:

Recreational Vehicles (RVs)

Modern off-grid travelers need massive reserves for residential appliances. Using our 12.8V 200Ah or 300Ah LiFePO4 packs replaces lead-acid arrays with one-third the weight, double the usable energy, and compatibility with alternator smart chargers.

Light Electric Vehicles (LEVs)

Golf carts, AGVs, and industrial floor sweepers demand high current discharge curves. Our customized 51.2V and 76.8V high-voltage LFP packs offer fast recharge times and robust vibrational defenses, lasting up to 10 years of daily usage.

Residential & Grid Storage

Wall-mounted solar batteries (48V/51.2V 100Ah/200Ah) and stackable configurations enable peak shaving and backup power storage during utility outages, optimizing high-yield solar arrays.

A Professional Procurement Framework for Custom Lithium Packs

As an industrial procurer, finding a partner you can trust requires validating specific core competencies:

1. Traceability of Cells

Ensure the manufacturer uses only A-grade cells with recorded serial numbers, rather than recycled components. Traceability ensures predictable aging characteristics and safety.

2. Hardware Testing

Confirm the presence of testing facilities on site, including aging chambers, vibration platforms, short-circuit testers, and environmental thermal shock units.

3. Custom BMS Control

The BMS must support multiple protections (over-charge, over-discharge, over-current, short-circuit, high/low temperature cut-off) to safeguard the application.

Frequently Asked Questions — Custom Lithium Ion Batteries

Why is LiFePO4 chemistry preferred over traditional lead-acid batteries?
LiFePO4 batteries feature a massive cycle life (>4,000 cycles at 80% depth of discharge), weigh approximately 60% less than equivalent lead-acid systems, can be discharged deeply without damaging cell health, and do not emit toxic gases or present acid-spill safety concerns.
What certifications are required to import lithium batteries internationally?
Custom lithium batteries require UN38.3 certification for transport safety. For regional markets, compliance with UL (United States/North America), CE/RoHS (Europe), and PSE (Japan) is critical for structural validation, insurance compliance, and public use.
How does Shenzhen Grenergy manage customization parameters?
Our engineers can customize chemical specifications, BMS firmware, structural materials (abs plastics, sheet metals, aluminum alloys), communication interfaces, physical layout dimensions, and connectors based on client specifications.
What are the lead times for custom lithium battery packs?
Typically, custom sample designs take 10 to 15 days, which includes CAD rendering, software configuration, and test runs. Mass production runs usually require 25 to 35 days, depending on materials and production quantities.
Does Grenergy offer third-party liability insurance?
Yes, Shenzhen Grenergy provides a $3 Million USD global product liability insurance policy for all shipped units, protecting clients against system failure losses.