Zero 1200W Hybrid Inverter Combo

How much battery backup power will I have when the power is off ?
E.g: If you connect 150w which is usually a TV, Wifi Router, Lights, etc.
This portable system will last 4-5 Hours when fully charged.

Specifications
12v Hybrid Pure Sine Wave Inverter 1200w Solar With A Rated Output Of 1200w Constant Power.
Operating Power Of (VAC) 154/265
Built-in Charger To Charge Your Battery When There Is Power
Output Voltage Regulation Voltage Range (VAC) 220/230 ± 10% (automatic adjustment Auto-sensing)
Conversion Time Transfer Time <8ms Waveform Sine Wave (sine)
Frequency Mains: Mains With Frequency Inverter: 60/50Hz ± 0.5

Features:
– Pure Sine Wave Inverter
– Power: 1200W
– 50AH Lithium Battery
– Voltage: 12VDC
– Charging Current: 19A
– PV Input Voltage Range: 15V-44V
– Standard With 3 Pin SA Plug Socket
– PV Array Maximum Power: 800W
– Brushed Stainless Steel Case With Industrial 360 Degree Swivel Wheels

Dimensions
Unboxed Dimensions (mm) (H) 385mm x (W) 240mm x (D) 355mm
Weight (Kg’s) – unboxed 18kg