Lead acid Battery

Lead acid Battery

  • OPzV Battery Procurement Guide

    Procuring OPzV2-420 OPzV tubular gel batteries for large-scale industrial energy storage projects requires verifying technical specifications, manufacturing credentials, and supply chain capability before placing orders. This procurement guide covers everything buyers need to know: how to verify OPzV2-420 specifications against datasheets, what test reports to request, how to evaluate Chinese manufacturers, and what warranty terms to negotiate. Using this checklist prevents the common procurement mistakes that lead to premature battery failures in industrial energy storage installations.

    OPzV2-420 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-420
    Voltage 2V
    Capacity (C10) 420Ah
    Dimensions (L×W×H) 145×206×471mm
    Weight 32.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-420 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-420 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-420’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-420 Charging Parameters

    Correct charging is critical to achieving OPzV2-420’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 84A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-420’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-420 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-420 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-420 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-420 original investment
    • Maintenance: OPzV2-420 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-420 OPzV Tubular Gel

    The OPzV2-420 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-420

    Q: What is the capacity of OPzV2-420?
    A: The OPzV2-420 has a rated capacity of 420Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-420?
    A: The OPzV2-420 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-420 suitable for?
    A: The OPzV2-420 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-420 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-420 cells, approximately 119 cells in a 119P24S configuration.

    Q: What is the charging voltage for OPzV2-420?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-420 vs AGM — which has longer cycle life?
    A: The OPzV2-420 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-420 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery for Telecom Backup Power

    The OPzV2-420 OPzV tubular gel battery has become the global standard for telecom backup power — chosen by tower companies and network operators who need reliable 20+ year battery performance at remote cell sites. With its maintenance-free sealed design, wide -40°C to +60°C operating range, and superior deep discharge recovery, the OPzV2-420 is specified for telecom backup applications in every climate zone from Sub-Saharan Africa to Northern Europe. This technical guide covers OPzV2-420 specifications, sizing, and charging parameters for telecom engineers and procurement teams.

    OPzV2-420 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-420
    Voltage 2V
    Capacity (C10) 420Ah
    Dimensions (L×W×H) 145×206×471mm
    Weight 32.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-420 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-420 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-420’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-420 Charging Parameters

    Correct charging is critical to achieving OPzV2-420’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 84A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-420’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-420 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-420 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-420 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-420 original investment
    • Maintenance: OPzV2-420 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-420 OPzV Tubular Gel

    The OPzV2-420 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-420

    Q: What is the capacity of OPzV2-420?
    A: The OPzV2-420 has a rated capacity of 420Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-420?
    A: The OPzV2-420 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-420 suitable for?
    A: The OPzV2-420 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-420 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-420 cells, approximately 119 cells in a 119P24S configuration.

    Q: What is the charging voltage for OPzV2-420?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-420 vs AGM — which has longer cycle life?
    A: The OPzV2-420 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-420 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV vs AGM Battery Comparison

    The OPzV2-420 OPzV tubular gel battery and standard AGM VRLA batteries represent two fundamentally different philosophies in energy storage: AGM offers lower upfront cost, while OPzV tubular gel delivers 3–5x longer cycle life and 20+ year float life. For solar energy storage projects with a 5+ year operational horizon, the OPzV2-420 OPzV consistently outperforms AGM on total cost of ownership — even though the upfront investment is higher. This direct comparison examines the technical and economic differences that matter for project developers and system integrators.

    OPzV2-420 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-420
    Voltage 2V
    Capacity (C10) 420Ah
    Dimensions (L×W×H) 145×206×471mm
    Weight 32.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-420 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-420 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-420’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-420 Charging Parameters

    Correct charging is critical to achieving OPzV2-420’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 84A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-420’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-420 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-420 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-420 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-420 original investment
    • Maintenance: OPzV2-420 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-420 OPzV Tubular Gel

    The OPzV2-420 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-420

    Q: What is the capacity of OPzV2-420?
    A: The OPzV2-420 has a rated capacity of 420Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-420?
    A: The OPzV2-420 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-420 suitable for?
    A: The OPzV2-420 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-420 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-420 cells, approximately 119 cells in a 119P24S configuration.

    Q: What is the charging voltage for OPzV2-420?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-420 vs AGM — which has longer cycle life?
    A: The OPzV2-420 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-420 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery Sizing Guide

    The OPzV2-420 OPzV tubular gel battery — a 2V 420Ah cell — is one of the most reliable deep cycle battery options for solar energy storage systems and telecom backup power worldwide. With 20+ year float life and 1,200+ cycles at 50% depth of discharge, the OPzV2-420 delivers a lower total cost of ownership than AGM batteries over any project lifecycle exceeding 5 years. This complete sizing guide covers how to configure OPzV2-420 cells into a solar or telecom battery bank, how many cells you need, and how to optimize charging parameters for maximum lifespan.

    OPzV2-420 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-420
    Voltage 2V
    Capacity (C10) 420Ah
    Dimensions (L×W×H) 145×206×471mm
    Weight 32.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-420 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-420 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-420’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-420 Charging Parameters

    Correct charging is critical to achieving OPzV2-420’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 84A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-420’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-420 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-420 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-420 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-420 original investment
    • Maintenance: OPzV2-420 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-420 OPzV Tubular Gel

    The OPzV2-420 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-420

    Q: What is the capacity of OPzV2-420?
    A: The OPzV2-420 has a rated capacity of 420Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-420?
    A: The OPzV2-420 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-420 suitable for?
    A: The OPzV2-420 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-420 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-420 cells, approximately 119 cells in a 119P24S configuration.

    Q: What is the charging voltage for OPzV2-420?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-420 vs AGM — which has longer cycle life?
    A: The OPzV2-420 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-420 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery Technology & 20-Year Float Life Explained

    The OPzV2-350 OPzV tubular gel battery achieves 20+ year float life through a combination of three engineered advantages: die-cast Pb-Ca alloy tubular positive plates that prevent active material shedding, high-purity nano-gel electrolyte that eliminates dry-out over decades, and a Pb-Ca alloy grid that corrodes at approximately 1/10th the rate of antimony-containing alloys. This technology deep-dive explains exactly why tubular plate design and gel electrolyte outperform flat-plate AGM in every critical reliability metric — and why the OPzV2-350 has become the preferred battery for nuclear power, data centers, and other critical infrastructure worldwide.

    OPzV2-350 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-350
    Voltage 2V
    Capacity (C10) 350Ah
    Dimensions (L×W×H) 124×206×471mm
    Weight 27.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-350 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-350 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-350’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-350 Charging Parameters

    Correct charging is critical to achieving OPzV2-350’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 70A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-350’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-350 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-350 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-350 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-350 original investment
    • Maintenance: OPzV2-350 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-350 OPzV Tubular Gel

    The OPzV2-350 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-350

    Q: What is the capacity of OPzV2-350?
    A: The OPzV2-350 has a rated capacity of 350Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-350?
    A: The OPzV2-350 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-350 suitable for?
    A: The OPzV2-350 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-350 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-350 cells, approximately 142 cells in a 142P24S configuration.

    Q: What is the charging voltage for OPzV2-350?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-350 vs AGM — which has longer cycle life?
    A: The OPzV2-350 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-350 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery Procurement Guide

    Procuring OPzV2-350 OPzV tubular gel batteries for large-scale industrial energy storage projects requires verifying technical specifications, manufacturing credentials, and supply chain capability before placing orders. This procurement guide covers everything buyers need to know: how to verify OPzV2-350 specifications against datasheets, what test reports to request, how to evaluate Chinese manufacturers, and what warranty terms to negotiate. Using this checklist prevents the common procurement mistakes that lead to premature battery failures in industrial energy storage installations.

    OPzV2-350 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-350
    Voltage 2V
    Capacity (C10) 350Ah
    Dimensions (L×W×H) 124×206×471mm
    Weight 27.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-350 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-350 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-350’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-350 Charging Parameters

    Correct charging is critical to achieving OPzV2-350’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 70A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-350’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-350 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-350 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-350 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-350 original investment
    • Maintenance: OPzV2-350 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-350 OPzV Tubular Gel

    The OPzV2-350 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-350

    Q: What is the capacity of OPzV2-350?
    A: The OPzV2-350 has a rated capacity of 350Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-350?
    A: The OPzV2-350 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-350 suitable for?
    A: The OPzV2-350 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-350 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-350 cells, approximately 142 cells in a 142P24S configuration.

    Q: What is the charging voltage for OPzV2-350?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-350 vs AGM — which has longer cycle life?
    A: The OPzV2-350 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-350 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery for Telecom Backup Power

    The OPzV2-350 OPzV tubular gel battery has become the global standard for telecom backup power — chosen by tower companies and network operators who need reliable 20+ year battery performance at remote cell sites. With its maintenance-free sealed design, wide -40°C to +60°C operating range, and superior deep discharge recovery, the OPzV2-350 is specified for telecom backup applications in every climate zone from Sub-Saharan Africa to Northern Europe. This technical guide covers OPzV2-350 specifications, sizing, and charging parameters for telecom engineers and procurement teams.

    OPzV2-350 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-350
    Voltage 2V
    Capacity (C10) 350Ah
    Dimensions (L×W×H) 124×206×471mm
    Weight 27.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-350 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-350 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-350’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-350 Charging Parameters

    Correct charging is critical to achieving OPzV2-350’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 70A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-350’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-350 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-350 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-350 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-350 original investment
    • Maintenance: OPzV2-350 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-350 OPzV Tubular Gel

    The OPzV2-350 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-350

    Q: What is the capacity of OPzV2-350?
    A: The OPzV2-350 has a rated capacity of 350Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-350?
    A: The OPzV2-350 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-350 suitable for?
    A: The OPzV2-350 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-350 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-350 cells, approximately 142 cells in a 142P24S configuration.

    Q: What is the charging voltage for OPzV2-350?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-350 vs AGM — which has longer cycle life?
    A: The OPzV2-350 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-350 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV vs AGM Battery Comparison

    The OPzV2-350 OPzV tubular gel battery and standard AGM VRLA batteries represent two fundamentally different philosophies in energy storage: AGM offers lower upfront cost, while OPzV tubular gel delivers 3–5x longer cycle life and 20+ year float life. For solar energy storage projects with a 5+ year operational horizon, the OPzV2-350 OPzV consistently outperforms AGM on total cost of ownership — even though the upfront investment is higher. This direct comparison examines the technical and economic differences that matter for project developers and system integrators.

    OPzV2-350 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-350
    Voltage 2V
    Capacity (C10) 350Ah
    Dimensions (L×W×H) 124×206×471mm
    Weight 27.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-350 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-350 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-350’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-350 Charging Parameters

    Correct charging is critical to achieving OPzV2-350’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 70A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-350’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-350 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-350 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-350 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-350 original investment
    • Maintenance: OPzV2-350 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-350 OPzV Tubular Gel

    The OPzV2-350 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-350

    Q: What is the capacity of OPzV2-350?
    A: The OPzV2-350 has a rated capacity of 350Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-350?
    A: The OPzV2-350 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-350 suitable for?
    A: The OPzV2-350 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-350 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-350 cells, approximately 142 cells in a 142P24S configuration.

    Q: What is the charging voltage for OPzV2-350?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-350 vs AGM — which has longer cycle life?
    A: The OPzV2-350 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-350 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery Sizing Guide

    The OPzV2-350 OPzV tubular gel battery — a 2V 350Ah cell — is one of the most reliable deep cycle battery options for solar energy storage systems and telecom backup power worldwide. With 20+ year float life and 1,200+ cycles at 50% depth of discharge, the OPzV2-350 delivers a lower total cost of ownership than AGM batteries over any project lifecycle exceeding 5 years. This complete sizing guide covers how to configure OPzV2-350 cells into a solar or telecom battery bank, how many cells you need, and how to optimize charging parameters for maximum lifespan.

    OPzV2-350 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-350
    Voltage 2V
    Capacity (C10) 350Ah
    Dimensions (L×W×H) 124×206×471mm
    Weight 27.50kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-350 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-350 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-350’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-350 Charging Parameters

    Correct charging is critical to achieving OPzV2-350’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 70A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-350’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-350 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-350 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-350 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-350 original investment
    • Maintenance: OPzV2-350 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-350 OPzV Tubular Gel

    The OPzV2-350 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-350

    Q: What is the capacity of OPzV2-350?
    A: The OPzV2-350 has a rated capacity of 350Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-350?
    A: The OPzV2-350 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-350 suitable for?
    A: The OPzV2-350 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-350 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-350 cells, approximately 142 cells in a 142P24S configuration.

    Q: What is the charging voltage for OPzV2-350?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-350 vs AGM — which has longer cycle life?
    A: The OPzV2-350 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-350 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn

  • OPzV Battery Technology & 20-Year Float Life Explained

    The OPzV2-300 OPzV tubular gel battery achieves 20+ year float life through a combination of three engineered advantages: die-cast Pb-Ca alloy tubular positive plates that prevent active material shedding, high-purity nano-gel electrolyte that eliminates dry-out over decades, and a Pb-Ca alloy grid that corrodes at approximately 1/10th the rate of antimony-containing alloys. This technology deep-dive explains exactly why tubular plate design and gel electrolyte outperform flat-plate AGM in every critical reliability metric — and why the OPzV2-300 has become the preferred battery for nuclear power, data centers, and other critical infrastructure worldwide.

    OPzV2-300 OPzV Battery: Complete Specifications

    Specification Value
    Model OPzV2-300
    Voltage 2V
    Capacity (C10) 300Ah
    Dimensions (L×W×H) 145×206×354mm
    Weight 24.40kg
    Float Life 20+ years @ 25°C
    Operating Temp -40°C to +60°C
    Terminal φ20-M8
    Certification ISO 9001, CE, IEC 60896, DIN 40739

    Why OPzV2-300 OPzV Tubular Gel Outperforms AGM

    There are three fundamental engineering differences between OPzV tubular gel and standard AGM batteries that determine real-world performance:

    1. Tubular positive plates — The die-cast Pb-Ca alloy spines enclosed in fiberglass gauntlet tubes prevent positive active material shedding, the primary failure mode in flat-plate VRLA batteries. This allows OPzV2-300 to sustain deep cycling for decades.
    2. Nano-gel electrolyte — High-purity silica gel immobilizes the acid, preventing stratification and eliminating dry-out. Unlike AGM’s glass mat, gel maintains saturation throughout the battery’s life.
    3. Pb-Ca alloy grid corrosion rate — The OPzV2-300’s grid corrodes at approximately 1/10th the rate of antimony-containing alloys used in flooded batteries, enabling 20+ year design life.

    OPzV2-300 Charging Parameters

    Correct charging is critical to achieving OPzV2-300’s 20+ year design life. The following parameters are recommended:

    • Float charge voltage: 2.23V per cell @ 25°C
    • Temperature compensation: -3mV/°C per cell
    • Boost/equalize voltage: 2.35V per cell @ 25°C
    • Cyclic charge voltage: 2.40–2.45V per cell @ 25°C
    • Maximum charge current: 0.20C10A = 60A for this model

    Using an incorrect charging voltage — particularly exceeding 2.45V per cell — will significantly reduce OPzV2-300’s cycle life and may cause permanent damage to the nano-gel electrolyte structure.

    Total Cost of Ownership: OPzV2-300 vs AGM

    For a 48V 100kWh solar storage system using OPzV2-300 cells:

    • AGM system life: 3–5 years before replacement (400–800 cycles at 50% DoD)
    • OPzV2-300 OPzV system life: 20+ years (1,200+ cycles at 50% DoD)
    • Replacement cost avoided: 3–4 AGM replacements over 20 years — equal to the OPzV2-300 original investment
    • Maintenance: OPzV2-300 is maintenance-free; AGM requires periodic inspection and replacement

    Applications for OPzV2-300 OPzV Tubular Gel

    The OPzV2-300 is certified and specified for the following applications:

    • Solar and wind renewable energy storage systems
    • Telecom cell tower and transmission site backup power
    • UPS and data center battery backup
    • Nuclear power plant control systems
    • Utility grid frequency regulation and peak shaving
    • Industrial power backup and emergency lighting

    Frequently Asked Questions about OPzV2-300

    Q: What is the capacity of OPzV2-300?
    A: The OPzV2-300 has a rated capacity of 300Ah at the C10 discharge rate.

    Q: What is the float life of OPzV2-300?
    A: The OPzV2-300 is designed for 20+ years float life at 25°C, significantly outperforming standard AGM batteries.

    Q: What applications is OPzV2-300 suitable for?
    A: The OPzV2-300 is ideal for solar energy storage systems, telecom backup power, UPS, data centers, and nuclear power plants.

    Q: How many OPzV2-300 cells for a 48V solar system?
    A: A 48V system requires 24 cells in series (24 × 2V = 48V). For a 100kWh system using OPzV2-300 cells, approximately 166 cells in a 166P24S configuration.

    Q: What is the charging voltage for OPzV2-300?
    A: Float charge: 2.23V/cell @ 25°C. Boost/equalize: 2.35V/cell @ 25°C. Cyclic: 2.40–2.45V/cell @ 25°C.

    Q: OPzV2-300 vs AGM — which has longer cycle life?
    A: The OPzV2-300 tubular gel delivers 1,200+ cycles at 50% DoD, versus 400–800 cycles for standard AGM batteries.

    Related OPzV Battery Models

    For OPzV2-300 OPzV battery specifications, volume pricing for solar/telecom projects, and OEM partnership programs: sales@chisen.cn | www.chisen.cn

    About CHISEN Battery: CHISEN is a professional lead-acid battery manufacturer in China with 20+ years of production experience. ISO 9001/CE/UL certified factory. OPzV tubular gel batteries exported to 50+ countries worldwide. For technical specifications and volume pricing: www.chisen.cn | sales@chisen.cn