Looking for Answers about NPower Portable Power System - 1800 Watts?

This NPower portable power system supplies household electricity for emergency backup power or power you can bring anywhere. Electronically converts 12V power from the battery pack to a 110V power supply that can provide power to run large household appliances, tools and more. Powered by 3 rechargeable sealed AGM 20 Ah batteries (60 Ah total battery capacity). Includes a built-in inverter and five AC sockets. Watts: 1,800, Amps: 60, Volts: 120, Running Watts: 1,800, Surge Watts: 3,600, Compatible With: Large 120V appliances, LED Indicators: Yes, Battery Type: 20 Ah sealed lead acid, Batteries (qty.): 3, Built in Inverter: Yes, AC Outlets (qty.): 5, USB Ports (qty.): 1, DC Outlets (qty.): No, Rechargeable: Yes, GFCI Protection: No, Includes Solar Charger: No, Includes Air Compressor: No, Includes Flashlight: No, Includes Sound System: No, Handle Included: Yes, Storage Compartment: No, Dimensions L x W x H (in.): 19 5/16 x 8 3/8 x 11 1/2 For outdoor and indoor applications Recharges from standard wall outlet Includes 5V, 500mA USB port for versatile usage Includes three 20 Ah batteries (60 Ah total battery capacity)