OutBack Power Installation Manual

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Wiring

900-0123-01-00 Rev C 43

In Figure 39, when Switch 1 is on (normal operation), the inverter’s output sends power to the loads.

Switch 2 is off, preventing the inverter from sending power back to the AC source (backfeeding).

When Switch 2 is on (bypass operation), the AC source sends power directly to the loads. Switch 1 is

off, removing the inverter’s output from the loads. This also prevents the AC source from backfeeding

the inverter. With the inverter removed from the circuit, maintenance can be performed as necessary.

Figure 39 Bypass Switches

The GSLC can be ordered with bypass circuit breakers for this purpose, or it has a bypass option (the

GS-IOB-120/240VAC or GS-IOB-230VAC) which can be installed.

Figure 40 OutBack Bypass (split-phase)

IMPORTANT:

If multiple Radian inverters are stacked in a single system, then these devices

cannot be used. The bypass function must be simultaneous for all inverters. The

GSLC bypass kits operate independently, not simultaneously.

In a new system with multiple Radian inverters, the basic GSLC should be used in conjunction with an

external assembly of this kind, as shown in Figure 41. The GS-IOB kits should not be installed, or if

previously installed, should be removed and all wires disconnected.

OutBack does not offer a solution for bypassing multiple inverters. However, electrical suppliers offer

both manual and automatic double-pole, double-throw bypass switches in a range of sizes and

options. These are highly recommended for systems larger than a single inverter.

WARNING: Shock Hazard or Equipment Damage

Using independent bypass devices on multiple inverters can result in power being routed

to inappropriate places. This could lead to an electric shock or to equipment damage.

AC Loads

Switch 1

Switch 2

Inverter Output

Bypass AC Source

Switch 1 and Switch 2 are prevented

from being on at the same time by the

Mechanical Interlock. Although both

switches can be off, only one can be on.

In OutBack bypass assemblies, circuit

breakers are used instead of standard

switches.

The inverter may use an AC

source which powers the

inverter’s output. The bypass

assembly does not disconnect

the inverter’s input.

AC Source

AC Loads

GSLC Bypass

Disconnected

Radian

Inverter

Input Wiring

Output Wiring