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The APsystems QT2 is a native, three-phase quad microinverter delivering up to 1728VA of continuous AC output at 208V. A single unit connects four PV modules across two independent MPPTs, cutting per-module hardware count and install time on commercial rooftops.

With module-level power electronics, the QT2 meets NEC rapid shutdown requirements with no need for additional equipment. Performance data for every module is available 24/7 through the APsystems EMA monitoring platform via encrypted Zigbee. 

The QT2 microinverter is designed for commercial and light industrial solar on 208V three-phase services such as office buildings, retail stores, schools, warehouses, etc. The plug-and-play AC bus architecture suits projects where string inverter placement is impractical, shading varies across the arrays, or module-level monitoring and rapid shutdown compliance are priorities. Compatible with both delta and wye grid configurations.

• Max Continuous Output Power: 1728VA @ 208V  
• PV Modules per Unit: 4 (2 independent MPPTs)  
• Recommended Module Power: 315W–670W+  
• Max DC Input Current: 20A per input  
• MPPT Voltage Range: 30–45V  
• Max Units per 30A Branch: 5  
• AC Bus Cable: 10AWG, 5-wire  
• Peak / CEC Efficiency: 96.5% / 96%  
• Rapid Shutdown: Built-in, NEC 690.12 compliant — no external equipment required  
• Grid Compliance: UL 1741-SB, IEEE 1547, CA Rule 21  
• Enclosure: Type 6, natural convection (no fans)  
• Operating Temperature: -40°F to +149°F  
• Communication: Encrypted Zigbee to ECU (ECU-R or ECU-C required for monitoring)  
• Warranty: 25 years standard