The Fortress Power EdgeOn Duo 9 and EdgeOn Duo 15 are high-performance split-phase hybrid inverters engineered for residential solar + storage applications. Designed to support today’s high-power PV modules, the Duo 9 delivers up to 9,000W of PV input with two independent MPPTs (30A/22A), while the Duo 15 supports up to 15,000W of PV input with three independent MPPTs (30A/22A/22A)—maximizing solar energy harvest across a wide range of system designs.

Both models support AC- and DC-coupled solar configurations and include advanced safety and protection features such as AFCI, rapid shutdown, and surge protection. With a seamless backup switchover time of under 10ms, EdgeOn Duo inverters ensure uninterrupted power during grid outages. Compatible with both lithium and lead-acid batteries (40–64V) and capable of handling up to 210A charge and discharge current, the Duo 9 and Duo 15 are fully scalable—supporting parallel installations of up to 9 units. Together, they offer a flexible, future-ready solution for homeowners seeking greater energy independence and reliable backup power.