Outback Radian GS8048A 8kW AC Coupling Kit

Outback Power
AC Coupling Bundles with
Radian Series Inverter/Chargers

Give the peace of mind that comes with having backup power in the event of a utility outage. The Radian Series AC Coupling bundles from OutBack enable existing grid-tied systems to tap into the flexibility and freedom of battery backup in the face of the evolving energy landscape.

When there is a grid outage, AC Coupling employs a frequency shifting technique to prevent the grid tie inverter in your existing PV system, from overcharging the battery bank during times when it's putting out more power than can be consumed by the loads.  The excess power from the grid tied inverter can harm the battery bank in the form of an unregulated charge exceeding safe charging limits of the batteries.  When safe charging limits are exceeded, the OutBack Radian inverter will shift the frequency upwards from 60 Hz to as much as 64.5 Hz to make the grid tie inverter incrementally reduce its output or disconnect itself from the AC coupled circuit.

NOTE: The Radian inverter is limited to a maximum of 25A load current at 240 Vac, from the grid tie inverter, which means a 6kW grid tie inverter is the maximum that can be connected. However, the Radian Frequency Shift solution does support stacking up to three Radian inverters in parallel - so this solution can now support larger grid-tie systems over 10kW!

Each Bundle Includes:

Radian Series Inverter/Charger

GSLC175-120/240 Load Center

Mate 3s and mounting bracket

Generator Protection Kit - Protects connected generators from incidental current backfeed using standard transfer relay (see Install Instructions in DOCUMENTS tab above)

30A Dual Pole Breaker (for connecting the grid-tie inverter inside the GS load center)

Radian AC Coupled Diagram:

During a power outage, when the sun is shining, and the grid tie inverter goes offline, the Radian will power the loads in the critical sub-panel, while it's in the backup mode of operation.  This allows the PV power to flow to the backup panel's connected loads, as well as charge the batteries, if the grid tie inverter is generating more power than can be absorbed by the loads. 

**See Application Note in DOCUMENTS tab for how the Radian works with a grid tie inverter in an existing system.