Victron energy Phoenix MultiPlus 12/3000/120 Manuel page 8

Autonomous operation when the grid fails
Houses or buildings with solar panels or a combined micro-scale heating and power
plant or other sustainable energy sources have a potential autonomous energy supply
which can be used for powering essential equipment (central heating pumps,
refrigerators, deep freeze units, Internet connections, etc.) during a power failure. A
problem is however that grid connected sustainable energy sources drop out as soon
as the grid fails. With a MultiPlus and batteries, this problem can be solved in a simple
manner: the MultiPlus can replace the grid during a power failure. When the
sustainable energy sources produce more power than needed, the MultiPlus will use
the surplus to charge the batteries; in the event of a shortfall, the MultiPlus will supply
additional power from the battery.
Multi-functional relay
The MultiPlus is equipped with a multi-functional relay that by default is programmed
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.
Programmable with DIP switches, VE.Net panel or personal computer
The Phoenix Inverter is supplied ready for use. Three features are available for
changing certain settings if desired:
The most important settings (including parallel operation of up to three devices
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and 3-phase operation) can be changed in a very simple manner, using DIP
switches.
All settings, with exception of the multi-functional relay, can be changed with a
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VE.Net panel.
All settings can be changed with a PC and free of charge software,
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downloadable from our website
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.
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