Victron energy MultiPlus 12/2000/80-30 230V Manuel page 8

2.2 Battery Charger
Adaptive 4-stage charge characteristic: bulk – absorption – float – storage
The Multi Compact features a microprocessor controlled 'adaptive' battery management
system that can be preset to suit different Typs of batteries. The 'adaptive' feature will
automatically optimize 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
If, in order to quickly charge a battery, a high charge current in combination with a high
absorption voltage has been chosen, the Multi Compact will prevent damage due to
excessive gassing by automatically limiting the rate of voltage increase once the gassing
voltage has been reached.
Less maintenance and aging when the battery is not in use: the Storage mode
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 a 12V battery)
to minimize 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 Multi Compact features 2 outputs, of which 1 can carry the full output current. The
second output, limited to approximately 4A and with a slightly lower output voltage, is
intended to top up a starter battery.
To increase battery life: temperature compensation
Every Multi Compact 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.
Learn more about batteries and battery charging
To learn more about batteries and charging batteries, please refer to our book 'Electricity on
Board' (available free of charge from Victron Energy and downloadable from
www.victronenergy.com) For more information about adaptive charging please look under
Technical Briefs on our website.
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