Battery Charger - Victron energy MultiPlus 12 500 20 Manuel

2. DESCRIPTION
2.1 General
Multifunctional
The Multi gets its name from the multiple functions it can perform. It is a powerful true sine
wave inverter, a sophisticated battery charger that features adaptive charge technology and a
high-speed AC transfer switch in a single enclosure. Beside these primary functions, however,
the Multi has several advanced features that provide a range of new applications as outlined
below.
Uninterrupted AC power
In the event of a grid failure, or shore or generator power being disconnected, the inverter
within the Multi is automatically activated and takes over supply to the connected loads. This
happens so fast (less than 20 milliseconds) that computers and other electronic equipment
will continue to operate without disruption.
Parallel and 3-phase operation capability
Up to 6 inverters can operate in parallel to achieve higher power output.
Operation in 3-phase configuration is also possible.
PowerControl – Dealing with limited generator or shore side power
With a Multi Control Panel a maximum generator or shore current can be set. The Multi will
then take account of other AC loads and use whatever is extra for charging, thus preventing
the generator or shore supply from being overloaded.
PowerAssist – Boosting the capacity of shore or generator power (800 VA and 1200 VA
models only)
This feature takes the principle of PowerControl to a further dimension allowing the MultiPlus
Compact to supplement the capacity of the alternative source. Where peak power is so often
required only for a limited period, it is possible to reduce the size of generator needed or
conversely enable more to be achieved from the typically limited shore connection. When the
load reduces, the spare power is used to recharge the battery.
Programmable relay
The Multi is equipped with a programmable relay that by default is set as an alarm relay. The
relay can be programmed for all kinds of other applications however, for example as a starter
relay for a generator.

2.2 Battery charger

Adaptive 4-stage charging characteristics: bulk – absorption – float – storage
The microprocessor-driven adaptive battery management system can be adjusted for various
types of batteries. The adaptive function automatically adapts the charging process to battery
use.
The right amount of charge: variable absorption time
In the event of slight battery discharge, absorption is kept short to prevent overcharging and
excessive gas formation. After deep discharging, the absorption time is automatically
extended in order to fully charge the battery.
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