Battery Charging By Solar Power - FLOWBIRD CWT Compact Touch Manual

A warning event can be generated and sent to CWO if the voltage drops below a
certain warning level. The default value is 11.9 V.
The terminal will be set in error state and an error event can be sent to CWO if
the voltage drops below a certain error level. The default value is 11.5 V.
A restore event will be generated and can be sent to CWO when the voltage,
while increasing, reaches a certain recovery level. The default value is 12.1 V. A
typical measured value is 12.5 V.
Note:
The automatically measured voltage usually differs from the battery voltage
measured with a voltage meter without any load applied.
When the battery is being charged, the measured charging voltage will be
approximately 13.7 V.
Under certain circumstances, a sleep mode function can be activated if the
terminal is solar powered, or powered by the battery only.
Important:
The minimum voltage required for proper ticket printing and operation of the
electronic locks is 11.1 V at room temperature (20 ˚C).
4.9.2

Battery charging by solar power

A solar powered terminal has no battery charger. Instead, the solar panel
charges the battery via the CPU board and a cable between the CPU board and
the battery. The CPU board measures the charging current and if the charging
voltage exceeds 18 V a fuse will blow.
The result of the measured charging current is sent to CWO. A warning event will
be generated if the current drops below the warning level and the terminal will be
set in error state if the current drops below the error level. A restore event will be
generated when the current reaches the recovery level.
Reference:
See CWT Software Configuration Handbook for more information about this.
Page 48 CWT Compact Touch Installation and Maintenanace Manual Issue 13