Victron energy MultiPlus 12/3000/120 - 50, Manual

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WeakAC
Strong distortion of the input voltage can result in the charger hardly operating or not
operating at all. If WeakAC is set, the charger will also accept a strongly distorted
voltage, at the cost of greater distortion of the input current.
Recommendation: Turn WeakAC on if the charger is hardly charging or not charging
at all (which is quite rare!). Also turn on the dynamic current limiter simultaneously,
and reduce the maximum charging current to prevent overloading the generator if
necessary.
Not adjustable with DIP switches.
BoostFactor
Change this setting only after consulting with Victron Energy or with an engineer
trained by Victron Energy!
Not adjustable with DIP switches.
Multi-functional relay
By default, the multi-functional relay is set as an alarm relay, i.e. the relay will de-
energise in the event of an alarm or a pre-alarm (inverter almost too hot, ripple on the
input almost too high, battery voltage almost too low). Not adjustable with DIP
switches.
VirtualSwitch
The VirtualSwitch is a software function in the MultiPlus microprocessor. The inputs of
this function are parameters that can be selected with VEConfigure (e.g. certain
alarms or voltage levels). The output is binary (0 or 1). The output can be connected
to a binary microprocessor output (e.g. the multi-functional relay, or the relay in the
AC input).
If connected to the multi-functional relay, and with battery voltage and time as input
values, for example, the VirtualSwitch can be configured to supply a generator
starting signal.
If connected to an AC input relay, and with battery voltage and time as input, for
example, the connected mains supply can be interrupted.
Application: A house or an office connected to the public mains, fitted with solar panels
with energy storage in batteries.
The batteries are used to prevent return delivery to the mains. During the day,
redundant solar energy is stored in batteries. This energy is used in the evenings
and at night. An energy shortfall is compensated by the mains. The MultiPlus
converts the battery DC voltage to AC. The power is always less than or equal to the
power consumption, so that return delivery to the mains does not occur. In the event
of mains failure, the MultiPlus isolates the premises from the mains, which become
autonomous (self-sufficient). In this way, a solar energy installation or a combined
micro-scale heating and power plant can be economically used in areas with an
unreliable mains supply and/or financially unfavourable energy-return conditions.