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 (800VA and 1200VA models only)
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 (800VA and 1200VA
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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