FLOWBIRD CWT Compact S4 Touch - Battery Charging by Solar Power

Page 45CWT Compact S4 Touch Installation & Maintenance Manual for CWT 1.0-0Issue 3
Product description
The terminal will be set in error state and an error event can be sent to WebOffice
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 WebOffice 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).
4.8.2
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 WebOffice. 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.