The 850VA Luminous is a 12V inverter, meaning you require just a single battery of 12V to run the inverter. A 200Ah battery will be recommended. This inverter capacity can run your 2 fans, 1 TV (modest-sized), say 6 CFL light points and a few other low-power-consumption devices like decoder.
MODEL SOLAR NXG 850
Voltage (Input): 110-290V
Max Bulb Load (Output)): 685 Watts
Maximum Charging Current (battery): 12V
Gross Weight (Kg.): 9.3
Dimension LxWxH (cm):29.2×27.5×12