EnerSys PowerSafe PV Bloc Operation Manual

2 Specifi c Abilities The specifi c abilities of this type of battery for renewable energy applications are as follows. • Cycling (one “cycle” consists of a discharge, of any depth, followed by a recharge) • Cycling in state of discharge • Low rate of self-discharge • No addition of water required during ...

3 The nominal capacity of PowerSafe® PV blocs for renewable energy applications is given as follows: Capacity Ah Current A Discharge period h End voltage V/cell C120 I120 120 1.85V Discharge Rate: Is the ratio of discharge current divided by battery capacity Depth of Discharge (DOD): Capacity removed from the battery ...

4 Charge Effi ciency The charge effi ciency is the ratio between the quantity of Ah delivered during the discharge and the quantity of Ah necessary to restore the initial state of charge. State of Charge (SOC) Ah Effi ciency 90 > 85 75 > 90 <50 > 95 1 GENERAL OPERATING INSTRUCTIONS 1.1 Operating Temperature Range T ...

5 PowerSafe® PV Bloc batteries must be given a refreshing charge: a. when maximum storage time is reached, or b. when the OCV approaches 2.10Volts/cell whichever occurs fi rst 1.3 Freshening Charge The refresh charge should be conducted using constant voltage (adjusted to the temperature) eg. 2.27Vpc at 20-25� ...

6 1.6 Products Covered by this Guide Nominal Capacity (Ah) Nominal Dimensions Type Nominal Voltage (V) 10 hr rate to 1.80Vpc @20°C 120 hr rate to 1.85Vpc @25°C Length mm in Width mm in Height mm in Typical Weight kg lbs Short Circuit Current (A) Internal Resistance (mΩ) 12 PVB 70 12 57 ...

7 2.2 Discharging As a rule, installations will be equipped with a regulator whose voltage threshold values will protect against deep discharge: Discharge 10h 120h 240h Low voltage alarm per cell 1.92 1.92V 1.95V Disconnect voltage per cell 1.80 1.85V 1.90V 2.3 Setting Charging Voltages In order to ensure optimum rech ...

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