Victron energy SmartSolar MPPT 150/45 Manual page 22

Absorption voltage
This setting sets the absorption voltage.
Adaptive absorption time
This setting enables or disables the adaptive absorption time.
• When disabled: The length of the absorption stage is the same each day, the length is determined by the "Maximum
absorption time" setting, provided there is enough solar power.
Be aware that this option can potentially result in overcharging your batteries, especially for lead batteries and if only shallow
daily discharges take place. Check with the battery manufacturer for the recommended maximum absorption time.
The only condition that can end the absorption time before the maximum time has been reached, is the "tail current" setting. If
the absorption time always needs to be the same length, then disable the "Tail current" setting. See more information on the tail
current setting further down in this chapter.
• When enabled: The length of the absorption stage is different each day, it adapts itself to the state of charge of the battery in
the morning at the beginning of the charge cycle.
The maximum "adaptive" absorption time for the day is determined by the battery voltage as measured just before the solar
charger begins operation each morning.
Multiplier
Adaptive absorption
time *
12V system
24V system
48V system
*) The adaptive absorption time is calculated by the multiplier times the "Maximum absorption time" setting. The adaptive
absorption times in this table are based on the 6 hour default "Maximum absorption time" setting.
Maximum absorption time
This setting sets the absorption time limit. This setting is only available when programming a custom charge profile.
Enter the maximum time in hours and minutes (hh:mm) the solar charger is allowed to spend in the absorption stage. The
maximum time that can be set is 12 hours and 59 minutes.
Float voltage
This setting sets the float voltage.
Re-bulk voltage offset
Page 19
MPPT solar charger manual
x 1 x 2/3
6:00 hours 4:00 hours
11.9V < Vbatt <
Vbatt < 11.9V
12.2V
Vbatt < 23.8 23.8 < Vbatt < 12.2V
23.8V < Vbatt <
Vbatt < 47.6
12.2V
x 1/3 x 1/6
2:00 hours 1:00 hour
12.2V < Vbatt <
Vbatt > 12.6V
12.6V
24.2V < Vbatt <
Vbatt > 25.2V
25.2V
48.8V < Vbatt <
Vbatt > 50.4
50.4V
Configuration and settings