Specifications
4
Less maintenance and aging when the battery is not used: the storage mode
The storage mode kicks in whenever the battery has not been subjected to discharge during 24 hours. In the storage mode
float voltage is reduced to 2,2 V/cell (13,2 V for 12 V battery) to minimise gassing and corrosion of the positive plates. Once a
week the voltage is raised back to the absorption level to ‘equalize’ the battery. This feature prevents stratification of the
electrolyte and sulphation, a major cause of early battery failure.
Two DC outputs for charging two batteries
The Quattro has two DC outputs, one of which can supply the full output current. The second output, intended for charging a
starter battery, is limited to 4A and has a slightly lower output voltage.
To increase battery life: temperature compensation
Every Quattro comes with a battery temperature sensor. When connected, charge voltage will automatically decrease with
increasing battery temperature. This feature is especially recommended for sealed batteries and/or when important fluctuations
of battery temperature are expected.
Battery voltage sense
In order to compensate for voltage loss due to cable resistance, the Quattro has a voltage sense facility so that the battery
always receives the correct charge voltage.
More on batteries and charging
Our book ‘Energy Unlimited’ offers further information on batteries and battery charging, and is available free of charge at
Victron Energy (see www.victronenergy.com ). For more information on adaptive charging characteristics, please refer to the
‘Tech Info’ page on our website
2.3 Overview of AC power options
Option 1 (see fig 1)
As explained in section 2.1, the 120/240V Quattro can be connected to the standard American single phase and split phase AC
supplies. When in inverter mode, however, the two live outputs are connected together to provide in phase 120 VAC on both
lines. The line to line voltage will be zero. Any 240VAC or 208VAC loads will therefore be supplied only when the Quattro is
supplied by a split phase 120/240V or 120/208V source. This prevents heavy loads such as 240V water heaters or 240 V air
conditioners from discharging the battery.
The input and output options are summarized below:
Option 1: 120/240V Quattro or Multi
AC source (input) Does system connect to
AC source?
Power for battery charging
taken from
Output
120/240V 3wire + ground
(split phase 60Hz)
Yes
Preferred 120V input leg
(L1-1 or L1-2)
120/240V 3wire + ground 60Hz
(output = input)
120/208V 3wire + ground
(three phase two leg 60Hz)
Yes
Preferred 120V input leg
(L1-1 or L1-2)
120/208V 3wire + ground 60Hz
(output = input)
240V 2 wire + ground
(single phase 60Hz)
No
120V 2 wire + ground 60Hz
(inverter mode)
230V 2 wire + ground
(single phase 50Hz)
No
120V 2 wire + ground 60Hz
(inverter mode)
208V 2 wire + ground
(single phase 60Hz)
No
120V 2 wire + ground 60Hz
(inverter mode)
120V 2 wire + ground
(single phase 60Hz)
Yes (if connected to preferred
input leg)
120V input
120V 2 wire + ground 60Hz
(output = input)
Not available (no input) No
120V 2 wire + ground 60Hz
(inverter mode)
PowerControl and PowerAssist functionality will be available on L1-1 and L1-2
Note: If the requirement is to continue supplying 240V or 208V equipment in inverter mode, a different system configuration
must be chosen: see option 2 and option 3.
Option 2a,b: two stacked units (see fig 2a and 2b)
Option 2a: One alternative is to stack 2 Quattro’s or Multi’s, each supplied by one 120V leg when a 120/240V or 120/208V AC
source is available. The stacked units will each continue to supply 120V from the battery when there is no external AC source
available. The Quattro’s or Multi’s are capable to synchronize and connect to both 120/240V and 120/208V AC, whatever is
available. When connected to the AC source, the output will be equal to the input. When operating from battery, the output will
either be 120/240V or 120/208V depending on whether the system has been configured to operate with a 180 degrees or a 120
degrees phase shift.
If only one 120V leg is available at the AC input, one unit will connect to it, and the other unit will operate on battery power.
System output will be 120/240V or 120/208V, depending on configuration. Power from the 120V leg that is available will be
used to charge the battery, compensating for power taken from the battery by the second unit.