Manual Victron SmartSolar MPPT 100 20-48V (page 10 of 86) (English, German, Dutch, French, Swedish, Spanish)

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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)

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 1Amp, 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:

The default settings can be modified with Bluetooth or via VE.Direct.

3.9 Automatic equalization

Automatic equalization is default set to ‘OFF’. With the Victron Connect app (see sect 1.9)

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. The current is limited to 8% of the bulk current for

the factory default battery type, and to 25% of the bulk current for a user defined battery

type. The bulk current is the rated charger current unless a lower maximum current setting

has been chosen.

When using the factory default battery type, automatic equalization ends when the voltage

limit (16.2V resp. 32.4V) has been reached, or after t = (absorption time)/8, whichever

comes first.

For 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.

3.10 VE.Direct communication port

See section 1.9 and 3.5.

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Victron SmartSolar MPPT 100 20-48V Manual

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