Victron energy SmartSolar MPPT 150/70-Tr VE.Can Anleitung Seite 15

Variations to expected behaviour
1.
Pausing of the absorption time counter
The absorption time counter starts when the configured absorption
voltage is reached and pauses when the output voltage is below the
configured absorption voltage.
An example of when this voltage drop could occur is when PV power (due
to clouds, trees, bridges) is insufficient to charge the battery and to power
the loads.
When the absorption timer is paused, the absorption LED will flash very
slowly.
2.
Restarting the charge process
The charging algorithm will reset if charging has stopped (i.e. the
absorption time has paused) for an hour. This may occur when the PV
voltage drops below the battery voltage due to bad weather, shade or
similar.
3.
Battery being charged or discharged before solar charging begins
The automatic absorption time is based on the start-up battery voltage
(see table). This absorption time estimation can be incorrect if there is an
additional charge source (eg alternator) or load on the batteries.
This is an inherent issue in the default algorithm. However, in most cases
it is still better than a fixed absorption time regardless of other charge
sources or battery state.
It is possible to override the default absorption time algorithm by setting a
fixed absorption time when programming the solar charge controller. Be
aware this can result in overcharging your batteries. Please see your
battery manufacturer for recommended settings.
4.
Absorption time determined by tail current
In some applications it may be preferable to terminate absorption time
based on tail current only. This can be achieved by increasing the default
absorption time multiplier.
(warning: the tail current of lead-acid batteries does not decrease to zero
when the batteries are fully charged, and this "remaining" tail current can
increase substantially when the batteries age)
Default setting, LiFePO4 batteries
LiFePO4 batteries do not need to be fully charged to prevent premature
failure.
The default absorption voltage setting is 14,2V (28,4V).
And the default absorption time setting is 2 hours.
Default float setting: 13,2V (26,4V).
These settings are adjustable.
Reset of the charge algorithm:
The default setting for restarting the charge cycle is
Vbatt < (Vfloat – 0,4V) for lead-acid, and Vbatt < (Vfloat – 0,1V) for LiFePO4
batteries, during 1 minute.
(values for 12V batteries, multiply by two for 24V)
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