The OPzS Series is a premium flooded tubular lead acid battery designed for applications requiring high reliability, long service life, and superior cycling performance. Manufactured according to DIN 40736 and IEC 60896 standards, the OPzS battery uses die-cast tubular positive plates with a patented active material formulation to ensure exceptional durability.

Core Features & Advantages

Ultra-Long Service Life

• Float design life: Over 20 years

• Engineered for long-term stationary energy storage

Exceptional Cycle Life

• Cycle life up to 400% of standard standby batteries

• Approximate performance:

  • 4000 cycles at 50% DOD

  • 6000 cycles at 30% DOD

• Excellent deep discharge recovery capability

Advanced Tubular Plate Technology

• Lead-antimony multi-alloy die-cast tubular positive plates

• Core structural foundation for long life and high reliability

• Optimized electrochemical stability

Strong Discharge Performance

• Maximum discharge current: 500A (5 seconds)

• Suitable for both:

  • Long-duration low current discharge

  • Short-duration high current discharge

Designed for Harsh & High-Altitude Environments

• Stable performance in wide temperature conditions

• Ideal for renewable energy systems in mountainous or remote regions

Key Technical Specifications (OPzS2-100 Example Model)

Electrical Performance Parameters

Reference Capacity (25°C)

• C3: 81.3 Ah

• C5: 90.5 Ah

• C10: 100.0 Ah

• C20: 121.0 Ah

Charging Voltage (25°C)

• Float Voltage: 2.23 – 2.25 V

  • Temperature compensation: −3mV/°C/cell

• Cycle Voltage: 2.40 – 2.45 V

  • Temperature compensation: −4mV/°C/cell

Operating Temperature Range

• Discharge: −15°C ~ 50°C

• Charge: 0°C ~ 40°C

• Storage: −15°C ~ 50°C

• Recommended Operating Temperature: 25°C ± 5°C

Self-Discharge Characteristics

• Can be stored up to 2 years before electrolyte filling

• After filling:

  • <3.5% self-discharge per month at 20°C

• Battery must be fully charged before use

Discharge Performance Data (25°C)

The documentation includes detailed:

• Constant Current Discharge Tables
  (30 minutes to 20 hours at 1.60V–1.85V per cell)

• Constant Power Discharge Tables

All performance values represent the average of three charge-discharge cycles and are not minimum guaranteed values.

Capacity acceptance criteria:

• ≥95% of C10 after first cycle

• 100% of C10 after third cycle

Performance Characteristic Curves

The OPzS series includes comprehensive performance graphs:

Discharge characteristic curves

Temperature impact on long-term life

Float service life characteristics (25°C test condition)

Cycle life vs depth of discharge

Charging voltage vs temperature curve

These curves support accurate system design and lifecycle estimation.

Application Fields

The OPzS series is widely used in:

• Solar power storage systems

• Wind energy storage systems

• UPS systems

• Traction vehicles and forklifts

• Industrial automation

• Power utility substations

• Telecom base stations

Conclusion

The OPzS Series Tubular Flooded Lead Acid Battery combines DIN-standard manufacturing, tubular plate technology, ultra-long service life, and superior cycling performance.

It is a reliable and cost-effective solution for renewable energy storage, industrial backup power, and high-demand stationary applications, especially in challenging environmental conditions.