I.R.I.S. QP-1800 - Manual (Page 8)

QuietPower 1800 Inverter Owner’s Manual Rev 15 OCT 01 Page 8
3.4 Wiring the QuietPower Inverter
Once your DC connections and ground wiring connection
are complete, the unit is ready to deliver AC power via the
front outlet.
3.4.1 Making DC Wiring Connections
The cables supplied with the QuietPower Inverter System
are approximately 12 feet long and are fabricated from 2/0
AWG multi-strand flexible cables. They are terminated with
a NATO SLAVE Plug at one end and two (2) lug terminals
which connect to the Inverter.
Before making connections, route the positive and negative
battery cables directly to the DC connection terminals on
the QuietPower Inverter. Slide the plastic terminal
connector covers (boots) over the positive and negative
cables (the red boot slides on the positive cable and the
black boot slides on the negative cable). Do not route the
cables through a distribution panel, battery isolator, or other
device that will add additional voltage drops.
3.4.2 DC Grounding
The QuietPower Inverter has a lug on the rear panel labeled Chassis Ground. This lug is used to connect
the chassis of the QuietPower Inverter to your DC ground as is required by regulations for some
installations.
4 QuietPower Inverter Operation
This section details how the unit functions as an inverter, provides information on the control panel, and
describes operating limits for inverter operation.
4.1. Principles of Operation
The QuietPower Inverter converts power from the batteries in two stages. The first stage is a DC-to-DC
converter, used to raise the low voltage DC input to high voltage DC. The second stage is the actual
inverter stage, taking the high voltage DC and converting it to a precise, true sine wave AC output.
The DC-to-DC converter stage uses modern high frequency power conversion technology that eliminates
the bulky, low frequency (50/60 Hz) based transformers found in inverters using older technology. The
inverter stage uses advanced power semiconductors that provide excellent overload capabilities.
4.2 Output Waveform
The AC output waveform of the QuietPower Inverter is a “true sine wave” with typically 1% Total
Harmonic Distortion (THD). Figure 3 illustrates the output waveform from the QuietPower Inverter. This
waveform is nearly identical to your utility-supplied power and in some cases where utility power is poor,
the QuietPower Inverter delivers cleaner, more precise AC power.
Figure 2. Control Panel Attachment.