12.3 Battery charging functions
12.3.1 Float charging
When the battery is fully charged, the controller automatically switches to float charging (charging
with the float charge voltage). This prevents the battery from being discharged.
ATTENTION!
The float charging voltage must be set according to the specifications of the battery manufac-
turer to ensure optimum charging of the battery.
Operation
Float charging voltage: ‘Main menu’
‘Battery settings’ ‘Charge voltages’ ‘Float charging’
12.3.2 Boost charging
Boost charging provides more intensive care of the battery than float charging. The following
applies in addition:
Q Boost charging starts when the switch-on threshold1) is reached. Boost charging can also be
started manually.
Q Boost charging stops after the charge duration has expired.
Q With boost charging the charging voltage is higher than with float charging.
Q After boost charging the controller automatically switches to float charging.
Observe the manufacturer's specifications when setting the charge duration and charge com-
pletion voltage.
Operation
Q Switch-on threshold: ‘Main menu’
‘Battery settings’ ‘Charge voltages’ ‘Boost
charging’ ‘Starting threshold’
Q Charge duration: ‘Main menu’
‘Battery settings’ ‘Expert menu’
2)
‘Boost charge dur.’
Q Charge completion voltage: ‘Main menu'
‘Battery settings’ ‘Charge voltages’
‘Boost charging’ ‘Boost charge voltage’
Q Starting boost charging manually: ‘Main menu’
‘Battery settings’ ‘Start boost charge’
1)
Value in percent with SOC control, in volts with voltage control
2)
More information on this is provided in section 13.5 'Calling up the expert menu for battery set-
tings'.
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