Mecer MX2 8K48V Axpert Maximum II 8kVA / 8kW Pure Sine Wave Inverter, 8000 VA / 8000 W rated power, 16000 VA surge power, 0.93 efficiency (Peak), 15 ms transfer time, 48 VDC battery voltage, Batteries not included, Battery not required to operate, 8000W Maximum PV Array power with Dual MPPT, 500 VDC Maximum PV Array open Circuit voltage, 6 units parallel capability