Outback Radian AC Coupling Note

Application Note
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By connecting (coupling) the output of the GTI to the output of a storage based inverter (SBI), the SBI
can act like a grid source that the GTI can synchronize to and process power from the PV array to a
backup load panel. The backup load panel is required so loads can be powered from either or both
inverters without backfeeding the main service panel during a grid outage (see next section on Grid
Outage operation). Figure 2 shows the new current paths from the PV array which now includes the
backup load panel, the battery bank, as well as main service panel loads before continuing on out to the
power grid if any excess PV power has been produced.
The SBI, in this case the OutBack Radian inverter, will only allow current to pass to the main service
panel and out to the grid in its
Grid Tied
input mode. No other Radian input modes will be allowed to
synchronize and connect to the grid when the
AC Coupling
function has been selected in the MATE3s
system display and controller.
Figure 2 GTI Power Flow with Active PV