Quattro-II 2x120V

The AC input can be supplied from a split-phase 120/240V source or a single-phase 120V source.

When an AC source is available, the inverter/charger will feed through the AC to its output. The output will therefore mirror the AC input.

The inverter/charger connects to the neutral and the preferred input line (L1). The power needed to charge the batteries will therefore be drawn from L1.

The inverter/charger switches to inverter operation when no AC source is available. The inverter output is 120V single phase. In invert mode, the inverter/charger connects both output lines (L1 and L2) together to provide 120VAC to loads on either line.

Any 240V loads will therefore be supplied only when the inverter/charger is supplied by a split-phase AC source. This prevents heavy loads such as water heaters or 240V air conditioners from discharging the battery.

240V loads should be connected between L1 and L2 which could be either AC-out-1 or AC-out-2. There will be 240V between them when the unit is connected to a split-phase input and 0V otherwise (single-phase grid or inverter mode). The voltage L1-N and L2-N will be 120V regardless of single or split-phase input. This can be better understood when looking at the power flow diagrams located in Power flow diagrams.

The basis of the Quattro-II is an extremely powerful sine inverter, battery charger and transfer switch in a compact casing.

Important features:

Two AC inputs; integrated switch-over system between shore voltage and generating set

The inverter/charger features two AC inputs (AC-in-1 and AC-in-2) for connecting two independent voltage sources. For example, two generator sets, or a mains supply and a generator set. The inverter/charger automatically selects the input where voltage is present.

If voltage is present on both inputs, the inverter/charger selects the AC-in-1 input, to which normally the generating set is connected.

Automatic and uninterruptible switching

In the event of a supply failure or when the generating set is switched off, the inverter/charger will switch over to inverter operation and take over the supply of the connected devices. This is done so quickly that the operation of computers and other electronic devices is not disturbed (Uninterruptible Power Supply or UPS functionality). This makes the inverter/charger highly suitable as an emergency power system in industrial and telecommunication applications.

Two AC outputs

Besides the usual uninterruptable output (AC-out-1), an auxiliary output (AC-out-2) is available that disconnects its load in the event of battery operation. Example: an electric boiler that is allowed to operate only if the genset is running or shore power is available. There are several applications for AC-out-2.

Please enter “AC-out-2” in the search box on our website and find the latest information about other applications.

Three phase capability

Up to 6 sets of three units can be parallel connected. Three units (or three sets of paralleled units) can be configured for three-phase output, to provide 43kW / 54kVA inverter power and more than 1260A (24V) charging capacity.

PowerControl – maximum use of limited AC power

The inverter/charger can supply a huge charging current. This implies heavy loading of the AC mains or generator. Therefore a maximum current can be set. The inverter/charger then takes other power users into account, and only uses “surplus' current for charging purposes.

- Input AC-in-1, to which usually a generating set is connected, can be set to a fixed maximum, so that the generating set is never overloaded.

- Input AC-in-2 can also be set to a fixed maximum. In mobile applications (ships, vehicles), however, a variable setting by means of a Multi Control Panel will usually be selected. In this way the maximum current can be adapted to the available shore current in an extremely simple manner.

PowerAssist – Extended use of generator or shore current: the inverter/charger “co-supply” feature

This feature takes the principle of PowerControl to a further dimension allowing the inverter/charger to supplement the capacity of the alternative source. Where peak power is often required only for a limited period, the inverter/charger will make sure that insufficient AC mains or generator power is immediately compensated for by power from the battery. When the load reduces, the spare power is used to recharge the battery.

Programmable relay

The inverter/charger is equipped with a programmable relay. The relay can be programmed for different applications, for example as a starter relay for a generator.

Programmable analogue/digital input/output ports (Aux in 1 and Aux in 2, see appendix)

The inverter/charger is equipped with 2 analogue/digital input/output ports.

These ports can be used for several purposes. One application is communication with the BMS of a lithium-ion battery.