Battery Charger - Victron energy MultiPlus 12/3000/120-16 Manual De Instrucciones

2.2 Battery charger

Adaptive 4-stage charge characteristic: bulk – absorption – float – storage
The MultiPlus features a microprocessor controlled 'adaptive' battery management system that can be preset to suit different types of
batteries. The 'adaptive' feature will automatically optimise the process relative to the way the battery is being used.
The right amount of charge: variable absorption time
When only shallow discharges occur (a yacht connected to shore power for example) the absorption time is kept short in order to
prevent overcharging of the battery. After a deep discharge the absorption time is automatically increased to make sure that the battery
is completely recharged.
Preventing damage due to excessive gassing: the BatterySafe mode (see fig. 2 below)
If, in order to quickly charge a battery, a high charge current in combination with a high absorption voltage has been chosen, the
MultiPlus will prevent damage due to excessive gassing by automatically limiting the rate of voltage increase once the gassing voltage
has been reached (see the charge curve between 14,4V and 15,0V in fig. 2 below).
Less maintenance and aging when the battery is not in use: the Storage mode (see fig. 1 & 2 below)
The storage mode kicks in whenever the battery has not been subjected to discharge during 24 hours. In the storage mode float voltage
is reduced to 2,2V/cell (13,2V for 12V battery) to minimise gassing and corrosion of the positive plates. Once a week the voltage is
raised back to the absorption level to 'equalize' the battery. This feature prevents stratification of the electrolyte and sulphation, a major
cause of early battery failure.
Two outputs to charge 2 battery banks
The MultiPlus features 2 outputs, of which 1 can carry the full output current. The second output, limited to approximately 4 A and with a
slightly lower output voltage, is intended to top up a starter battery.
To increase battery life: temperature compensation
Every MultiPlus comes with a battery temperature sensor. When connected, charge voltage will automatically decrease with increasing
battery temperature. This feature is especially recommended for sealed batteries and/or when important fluctuations of battery
temperature are expected.
Battery voltage sense
In order to compensate for voltage loss due to cable resistance the MultiPlus is provided with a voltage sense facility so that the battery
always receives the correct charge voltage.
Learn more about batteries and battery charging
To learn more about batteries and charging batteries, please refer to our book 'Energy Unlimited' (available free of charge from Victron
Energy and downloadable from www.victronenergy.com). For more information about adaptive charging please look under Technical
Information on our website.
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