Selecting the correct capacity for a solar energy storage battery bank is one of the most consequential decisions in any off-grid or grid-tied solar project. The CHISEN OPzV2-500 OPzV tubular gel battery — a 2V 500Ah cell — offers a compelling combination of deep-cycle capability, exceptional float life, and proven reliability for solar applications worldwide.
About the OPzV2-500 OPzV Tubular Gel Battery
The OPzV2-500 is part of CHISEN’s OPzV series, featuring tubular positive plates and advanced nano-gel electrolyte technology. Key specifications:
- Nominal Voltage: 2V
- Rated Capacity: 500Ah (C10 rate)
- Dimensions: 166×206×471mm mm (L × W × H)
- Weight: 37.30kg kg
- Terminal: φ20-M8
- Float Life: 20+ years @ 25°C
- Operating Temperature: -40°C to +60°C
- Self-Discharge: <2% per month
How Many OPzV2-500 Cells Do You Need for a Solar System?
Solar energy storage systems are typically configured at 48V, requiring 24 cells in series (24 × 2V = 48V). For a 48V bank using OPzV2-500 cells:
- Total capacity: 500Ah × 48V = 24.0kWh per string
- For a 100kWh system: approximately 100 cells (100P 24S configuration)
- For a 200kWh system: approximately 200 cells (200P 24S configuration)
Why OPzV Tubular Gel for Solar?
Unlike AGM batteries, the OPzV2-500’s tubular positive plate design provides significantly longer cycle life under the regular partial state-of-charge (PSOC) operation common in solar applications. The nano-gel electrolyte eliminates electrolyte drying out and provides superior deep-discharge recovery — critical when sunny days are followed by several overcast days requiring deeper discharges.
Charging Parameters for OPzV2-500 in Solar Applications
- 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: 0.20C10 (100A for this model)
Total Cost of Ownership Advantage
While the OPzV2-500’s upfront cost is higher than equivalent AGM batteries, its 20+ year float life versus 3–5 years for AGM in solar applications means the OPzV2-500 delivers a significantly lower total cost of ownership over a 20-year project lifecycle.
Contact sales@chisen.cn for OPzV2-500 OPzV specifications, volume pricing for solar projects, and OEM partnership programs. www.chisen.cn
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