Add to Cart OutBack Power Systems OutBack Power GS4048A-AC Radian AC Coupling Bundle 4kW $4,599.00 OutBack Power GS4048A-AC Radian Series Inverter/Charger AC Coupling Bundle 4kW 48VDC 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... Compare Add to Cart Add to Wishlist