RST050
INSTALLATION
&
USER
MANUAL
10
Battery Maintenance
The RST050 is designed to maximise the life of the batteries used whilst also
maximising service availability to the user in the event of a normal supply interruption.
No special maintenance is required by the user apart from observing the
environmental requirements for the unit.
Battery Charge Modes
The RST050 uses a 3-stage charge algorithm (voltages quoted are at 25Celsius, and
are temperature compensated):
•
Under initial charge, the RST050 provides a
constant current
(boost) charge
until the battery voltage reaches 24.7Vdc.
•
The RST050 will then provides
constant voltage
charging at this 24.7Vdc
voltage, until either:
o
The current the batteries draw drops to C/100 (50mA for the 5Ah cells
used) after which the charger switches to standby-charge-mode, or
o
A total charge time of 7.5 hours has lapsed, after which the charger
switches to standby-charge-mode.
In standby-charge-mode the charge voltage drops to approximately 22Vdc and the
batteries are left in this charge mode, continually topping up charge.
