Browse our premier line of industrial-grade and consumer off-grid lithium batteries. All systems are scalable and ready for custom OEM/ODM packaging, optimized for long-term thermal safety and deep-cycle efficiency.
Modern energy infrastructure is undergoing a massive decentralization shift. Standard off-the-shelf energy storage systems (ESS) often fall short of meeting the rigorous requirements of off-grid installations. Whether addressing extreme remote temperatures, specialized communication protocols (like Modbus, CANbus, or RS485), or unique physical footprints, customization is no longer a luxury—it is a functional necessity.
Off-grid systems operating in remote industrial sites, critical telecommunication towers, and luxury mobile recreational vehicles (RVs) demand continuous, reliable power. Lead-acid alternatives lack the energy density, longevity, and thermal stability required. Standard Lithium-ion formulations can present safety concerns without advanced engineering. Custom LiFePO₄ (Lithium Iron Phosphate) battery architectures address these deficiencies by providing robust thermal stability, an exceptional life cycle (over 6,000 cycles at 80% DoD), and tailored Battery Management System (BMS) logic optimized for specific charge-discharge profiles.
Established in 2010, Shenzhen Grenergy Technology Co., Ltd. is a national high-tech enterprise specializing in the research, development, and advanced manufacturing of lithium-ion batteries, integrated energy storage systems (ESS), motive power batteries, custom battery management systems (BMS), and all-in-one smart energy configurations. Through a steadfast focus on technological innovation and meticulous manufacturing standards, Grenergy has established itself as a primary, trusted energy solution partner for corporations across the globe.
Over more than a decade of industry leadership, we have built a diverse portfolio encompassing direct lead-acid replacement lithium modules, high-voltage wall-mounted power walls, portable backup power stations, integrated mobile home storage systems, and heavy-duty trolley-style power units. Our solutions are designed from the cell level up to maximize operational safety, minimize downtime, and reduce carbon footprints.
Shenzhen serves as the global epicentre for electrochemical supply chains. Grenergy leverages this strategic localization to source A-grade raw materials, pristine prismatic cells, and high-performance semiconductor components. Operating from our state-of-the-art facility, we implement rigorous quality control mechanisms that ensure high yields, rapid turnaround times, and superior reliability.
By maintaining cell testing, pack design, structural enclosure fabrication, and advanced BMS programming within our facility, we retain absolute control over every stage of assembly. This vertical integration allows us to significantly reduce production lead times and lower final costs compared to distributed component assemblers.
Every battery cell undergoes meticulous capacity sorting, voltage balancing, and internal resistance matching before module integration. Our automated laser welding, high-current aging chambers, and localized environment controls prevent micro-shortages and ensure long-term cell life across diverse off-grid environments.
Our proximity to the major shipping ports of Shenzhen and Hong Kong facilitates streamlined handling of Class 9 Dangerous Goods. We ensure fast, safe, and fully compliant maritime, air, and overland transportation, supported by ready access to complete customs documentation.
At Grenergy, we reject the notion of one-size-fits-all battery solutions. Different applications demand specialized battery behaviors. A golf cart battery experiences frequent high-rate impulse discharges, while a residential solar battery wall requires steady, low-rate energy draw over several hours. Our engineering team designs custom BMS firmware and hardware configurations to meet these distinct needs, tailoring current limits, thermal thresholds, and communication profiles to the target application.
We offer extensive custom engineering support across multiple levels:
• Cell Chemistry Selection: While LiFePO₄ is our core standard for safety and longevity, we adapt designs to specialized cell models (prismatic or cylindrical) depending on space restrictions and temperature parameters.
• Custom Smart BMS: Native integration of Bluetooth monitoring, high-accuracy state-of-charge (SoC) algorithms, CANbus, RS485, and Modbus communication protocols ensures seamless compatibility with standard hybrid inverters (e.g., Victron, Growatt, Deye, SMA).
• Structural Enclosure Customization: IP65/IP67 rated enclosures, vibration-dampened housings for marine and vehicular operations, and standard 19-inch rack-mount configurations for data centers.
International compliance is critical for enterprise buyers. Lithium-ion batteries must adhere to strict international regulatory standards to ensure physical safety, environment protection, and transport safety. Grenergy maintains a comprehensive suite of international certifications, assuring reliability and compliant market entry worldwide.
Our manufacturing site and customized products are fully certified under:
• ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health & Safety).
• Safety Standards: UL 1973, UL 9540A, CE, FCC, PSE, and IEC 62619 compliance, which verifies the physical protection, electrical insulation, and fire-safety profiles of our battery architectures.
• Transport Compliance: UN38.3 and MSDS certifications, ensuring safe packaging and compliance during sea and air transit.
To provide additional security for our commercial customers, every Grenergy product is backed by a $3 million USD third-party product liability insurance policy. This insurance coverage reduces risk for distributors, installers, and system integrators worldwide, protecting against unforeseen damages and highlighting our confidence in our build quality.
Our custom LiFePO₄ and battery storage configurations are optimized for specific applications that demand high performance, environmental adaptability, and high cycle counts.
Designed to withstand continuous vibrations and mechanical shocks, our custom 12V and 24V deep-cycle batteries (available in 100Ah, 200Ah, and 300Ah capacities) provide lightweight, energy-dense power for high-draw appliances in mobile environments, outlasting standard lead-acid batteries up to tenfold.
Our wall-mounted and floor-standing high-capacity systems (51.2V 200Ah/314Ah) integrate seamlessly with solar panel installations. Equipped with smart BMS, these units provide clean power, support parallel expansion to scale storage capacity, and feature emergency backup configurations.
For construction sites, medical setups, and field applications, our heavy-duty trolley systems and rack-mounted backup arrays deliver dependable power. With built-in AC outputs up to 2500W and portable casing, these modules serve as reliable alternatives to diesel generators.
When sourcing battery solutions, procurement managers must evaluate several factors beyond the initial price per kilowatt-hour (kWh). Assessing total cost of ownership (TCO) and long-term integration costs is key to securing high-value energy storage systems.
Important procurement considerations include:
• Cycle Life vs. DOD: Systems operating at 80% Depth of Discharge (DoD) should maintain at least 80% capacity after 5,000 cycles. Lower-grade cells fail to meet this benchmark, leading to premature replacement costs.
• Direct Inverter Integration: Ensuring the BMS communicates natively with your inverter's protocol prevents communication errors and system shut-offs.
• Thermal Management and Safety: Batteries operating in extreme hot or cold zones need built-in heating elements or passive cooling channels to prevent thermal runaway and maintain charging capacity below freezing.
Grenergy provides complete technical validation before shipping, supplying B2B clients with comprehensive factory testing records, cell-matching data, and certification files to simplify integration into target applications.
Explore answers to common technical queries regarding custom LiFePO₄ batteries, manufacturing, and safety protocols.
Discover our high-voltage rack-mount batteries, portable trolley-style power units, and solar storage solutions designed for commercial and industrial use.
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