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Victron SmartSolar MPPT 150 45-Tr Manual

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3.8 Battery charging information
The charge controller starts a new charge cycle every morning, when the
sun starts shining.
Default setting:
The maximum duration of the absorption period is determined by the battery
voltage measured just before the solar charger starts up in the morning:
Battery voltage Vb (@start-up)
Maximum absorption time
Vb < 23,8V
6h
23,8V < Vb < 24,4V
4h
24,4V < Vb < 25,2V
2h
Vb > 25,2V
1h
(divide voltages by 2 for a 12V system and multiply by two in case of a 48V
system)
If the absorption period is interrupted due to a cloud or due to a power
hungry load, the absorption process will resume when absorption voltage is
reached again later on the day, until the absorption period has been
completed.
The absorption period also ends when the output current of the solar charger
drops to less than 2Amps, not because of low solar array output but because
the battery is fully charged (tail current cut off).
This algorithm prevents over charge of the battery due to daily absorption
charging when the system operates without load or with a small load.
User defined algorithm:
Any setting change performed with the pluggable LCD display or via
Bluetooth will override the rotary switch setting. Turning the rotary switch will
override prior settings made with the pluggable LCD display or via Bluetooth.
3.9 Automatic equalization
Automatic equalization is default set to ‘OFF’. With the VictronConnect app
or the pluggable LCD display this setting can be configured with a number
between 1 (every day) and 250 (once every 250 days). When automatic
equalization is active, the absorption charge will be followed by a voltage
limited constant current period (see table in section 3.5). The current is
limited to 8% of the bulk current for all VRLA (Gel or AGM) batteries and
some flooded batteries, and to 25% of the bulk current for all tubular plate
batteries and the user defined battery type. The bulk current is the rated
charger current unless a lower maximum current setting has been chosen.
In case of all VRLA batteries and some flooded batteries (algorithm number
0, 1, 2 or 3) automatic equalization ends when the voltage limit maxV has
been reached, or after t = (absorption time)/8, whichever comes first.
For all tubular plate batteries and the user defined battery type automatic
equalization ends after t = (absorption time)/2.
When automatic equalisation is not completely finished within one day, it will
not resume the next day, the next equalisation session will take place as
determined by the day interval.
… 12 …


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