How do i go about knowing my load consumption because i want to get an inverter that can sustain my load?

Question

Whenever there is power failure

Answer 1

You can get an average by looking at your electric bills.

Or you can add up the power consumption of each appliance, light, etc, and decide what ones could be on at the same time.

The cost is not in the inverter, a larger one is not much more than a small one, but in the batteries, the charge controller for the batteries and the switch to switch your house from utility to battery.

If you are going to keep everything running, you will quickly find that you need many many batteries.

Your best bet may be to look at what the minimum appliances/lights/ACs you want to keep running, and calculate based on those. Another critical number is the number of hours you need to keep running when the power is off.

Figure a large sealed lead acid battery is good for 1 kw-hr.

See how many kw's you will need, say 3 kw, and for how long, say 3 hrs. That is 9 kw-hrs and it will take 9 batteries to handle that.

Answer 2

First figure out what loads are essential

How many tubelights, how many fans, one TV and/or one computer

Forget about powering a fridge or microwave or geyser or AC on an inverter

Then call your suppliers for a quote - they will decide the rest based on your requirements