Specifications

18
UPS mode
If this setting is ‘on’ and AC on the input fails, the Quattro switches to inverter operation practically without interruption. The
Quattro can then be used as an Uninterruptible Power Supply (UPS) for sensitive equipment such as computers or
communication systems.
The output voltage of some generators is too unstable and distorted for using this setting – the Quattro would continually switch
to inverter operation. For this reason, the setting can be turned off. The Quattro will then respond less quickly to voltage
deviations on AC-in-1 or AC-in-2. The switchover time to inverter operation is consequently slightly longer, but most equipment
(computers, clocks or household equipment) is not adversely impacted.
Recommendation: Turn the UPS feature off if the Quattro fails to synchronise, or continually switches back to inverter
operation.
Dynamic current limiter
Intended for generators, the AC voltage being generated by means of a static inverter (so-called ‘inverter’ generators). In these
generators, engine speed is reduced when the load is low: This reduces noise, fuel consumption and pollution. A disadvantage
is that the output voltage will drop severely in the event of a sudden load increase. More load can only be supplied after the
engine is up to speed.
When this setting is ‘on’, the Quattro will start supplying extra power at a low generator output level and gradually allow the
generator to supply more, until the set current limit is reached. This allows the generator engine to get up to speed.
This setting is also often used for ‘classic’ generators that respond slowly to sudden load variation.
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 Quattro 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 one of the AC inputs).
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 Quattro 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 Quattro
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.