Battery backup setup, will this work?

[badkuk]

Basically i'm planning to get a deep cycle battery to power some appliances at home, around 500-600 watts. i'm still not sold on going off-grid solar, so i'm thinking initially, i'll just get a battery charger i can plug into a wall outlet for battery charging.

This is what i have in mind:



Tama ba yung iniisip ko, or am i missing something?

i'm a little confused on how long the battery will last: a 40Ah battery with a 2-amp load should last ~20 hours, but that's at 12-volt DC right? Not sure if there are adjustments to be made since me inverter pa.

tia