Operation Guide > PowerSafe
®
PV Bloc <
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°C
with 0.1 C
10
Amps current limit for a minimum period of 96h.
1.4 Commissioning
Installation & ventilation
The electrical protective measures and the accommodation and ventilation of the battery installation must be in
accordance with the applicable “local” national standards, rules and regulations.
Low ventilation requirement according to EN 50272-2.
The battery should be installed in a clean, dry area.
Avoid placing the battery in a hot place or in front of a window.
Check that all terminals contact surfaces are clean. Connect PV bloc with dedicated connectors following the wiring
circuit.
A loose connector can cause trouble in adjusting the system, erratic battery performance, and possible damage to the
battery and/or personal injury.
Commissioning
The initial charge is extremely important as it will condition the battery service life. So the battery must be fully recharged
to ensure that it is in an optimum state of charge.
Case 1:
Using a constant voltage charger. Cells here will need to be recharged at a constant voltage of between 2.35
and 2.40 Vpc at 25°C for a minimum of 48h and a maximum of 72h with a current limited to 0.10C
10
.
Case 2:
With no external source available for recharging. Connect the battery to the solar panel regulator and leave
at rest for 1 to 2 weeks. For this charge, set the regulator to the following values:
TºC
Voltage per cell
Low charge-restart voltage
0 to 20ºC
2.30V
20 to 40ºC
2.30V
High charge-disconnect
voltage
0 to 20ºC
2.50V
20 to 40ºC
2.45V
End-of-charge
The battery is charged once open-circuit voltage (OCV) readings after 24h of rest are in conformity with the values
shown on the above table. Each cell must register less than a 2% divergence from the average OCV reading.
1.5 Disposal
Lead acid PowerSafe
®
PV Bloc batteries are recyclable. End of life batteries must be packaged and transported
according to prevailing transportation rules and regulations. End of life batteries must be disposed of in compliance
with local and national laws by a licensed battery recycler.
