Victron energy Phoenix MultiPlus 12/3000/120 Manuel page 9

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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