The RITAR OPzS2-1000 battery is a lead-acid battery with a liquid electrolyte, utilizing tubular plate technology for high reliability and performance. The battery is designed and manufactured in accordance with DIN40736/IEC60896 standards for positive plates and features a proprietary formula for cast active material. OPzS series batteries offer a 400% longer cycle life than standard series batteries. This battery is ideal for use in renewable energy storage systems, such as solar and wind power plants, as well as traction applications. The OPzS series is the optimal choice for energy storage systems in high-altitude areas. Specifications:• Cells per unit: 1• Voltage per unit: 2V• Nominal capacity: 1000Ah at 10-hour discharge to 1.80V per cell at 25°C• Weight: Without electrolyte 61.5kg (tolerance 5%), with electrolyte 78.0kg (tolerance ±5%)• Internal resistance: ≤0.28mΩ (at full charge at 25°C)• Terminals: Default F10(M8)• Maximum discharge current: 3800A (5 sec)• Estimated life: 20 years• Maximum charge current: 125.0A• Reference capacity: • C5: 764.1Ah • C10: 1000.0Ah • C20: 1210.0Ah• Float charge voltage: 2.23V-2.25V@25°C• Float Temperature Compensation: -3mV/°C/cell• Cycle Voltage: 2.40V-2.45V@25°C• Cycle Temperature Compensation: -4mV/°C/cell• Operating Temperature Range: • Discharge: -15°C to 50°C • Charge: 0°C to 40°C • Storage: -15°C to 50°C• Normal Operating Temperature Range: 25°C ±5°C• Self-Discharge: OPzS series batteries are lead-acid batteries with flooded electrolyte. They can be stored for up to 2 years before refilling with acid. The monthly self-discharge rate is less than 3.5% at 20°C. Batteries must be charged before use.• Housing material: S.A.N. UL94-HB, optional UL94-V0.• Dimensions: • Length: 233 ±2 mm (9.17 in) • Width: 210 ±2 mm (8.27 in) • Height: 646 ±2 mm (25.4 in) • Overall height: 703 ±2 mm (27.7 in)• Torque value: 10-12 N m