1 kWh of nominal energy from one 2 V cell
Rated 500 Ah at the 10-hour rate to 1.8 V per cell at 25 °C, which is 1 kWh of nominal energy.

One 2 V OPzV cell rated 500 Ah at the 10-hour rate and holding 1 kWh, built as a 38.5 kg gel and tubular-plate block measuring 166 × 206 × 506 mm.
In stock
The Felicity Solar FL-OPzV-500AH-2V is a single 2 V OPzV cell rated 500 Ah at the 10-hour rate to 1.8 V per cell at 25 °C, which is 1 kWh of nominal energy. It weighs 38.5 kg, measures 166 mm wide by 206 mm high by 506 mm deep, and has an internal resistance of 0.65 mΩ. Gel electrolyte and tubular positive plates sit in a valve-regulated (VRLA) A.B.S. container rated UL94-HB, with UL94-V0 available as an option, and the terminals are thread insert and bolt (F10-M8). Charge the cell at up to 100 A and 2.4 V, float it at 2.25-2.3 V, run cycle service at 2.37-2.4 V and cut discharge off between 1.6 V and 1.9 V; maximum discharge current is 2000 A. Charging is rated 0 °C to 50 °C, discharging -40 °C to 70 °C and storage -20 °C to 60 °C, with 20 °C to 30 °C the optimal operating band. Because each unit holds one 2 V cell, you series-string as many as the bank voltage needs. We are an authorised Felicity Solar distributor and supply the OPZV-500AH-2V from our own stock, and the warranty is 2 Years.
Specifications last updated 23 March 2026
| Battery Type | Gel, Tubular Plate, VRLA |
|---|---|
| Cut-Off Voltage | 1.6-1.9 V |
| Cycle Service Voltage | 2.37-2.4 V |
| Float Charging Voltage | 2.25-2.3 V |
| Internal Resistance | 0.65 mΩ |
| Max Charging Current | 100 A |
| Max Charging Voltage | 2.4 V |
| Max Discharge Current | 2000 A |
| Nominal Capacity | 500 Ah |
| Nominal Energy | 1 kWh |
| Nominal Voltage | 2 V |
| Self-Discharge per Month | <2 |
| Voltage per Unit | 2 V |
| Capacity Rating Basis | 10hr-rate to 1.8V per cell @25°C |
|---|---|
| Cells per Unit | 1 |
| Container Material | A.B.S. (UL94-HB), and UL94-V0 is optional |
| Terminal Type | Thread insert & Bolt (F10-M8) |
| Charging Temperature Range | 0-50 °C |
|---|---|
| Discharging Temperature Range | -40 to 70 °C |
| Optimal Operating Temperature | 20-30 °C |
| Storage Temperature Range | -20 to 60 °C |








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Read: How to Protect Your Off-Grid Batteries from Overcharging →1 kWh. The cell is rated 500 Ah at the 10-hour rate to 1.8 V per cell at 25 °C at a nominal 2 V, which is 1 kWh of nominal energy in a single cell.
38.5 kg. It measures 166 mm wide, 206 mm high and 506 mm deep, and its terminals are thread insert and bolt (F10-M8) in an A.B.S. container rated UL94-HB, with UL94-V0 optional.
100 A maximum charging current and 2.4 V maximum charging voltage. Float charging is 2.25-2.3 V, cycle service 2.37-2.4 V, cut-off 1.6-1.9 V, and maximum discharge current is 2000 A.
-40 °C to 70 °C on discharge. Charging is rated 0 °C to 50 °C, storage -20 °C to 60 °C, and the optimal operating range is 20 °C to 30 °C. The warranty is 2 Years.