How To Choose The Perfect Inverter Batteries For Home

If you are planning to get yourself an inverter or want to upgrade the old one? Then you are in the right place. There are a lot of options available out there and testing them individually is quite difficult. So before getting yourself one, you should consider a lot of factors.

So in this article, we are going to tell the basic and essential things one needs to consider while choosing the batteries.

If you feel lazy and want to make it easier, then you should check top inverter batteries to pick from Probuyer. But make sure you dig up the entire article so that it will be easy to select one from the top picks.

How To Choose The Perfect Inverter Batteries For Home

Factors to be considered

  • Power Requirement.
  • Find the VA rating of the inverter.
  • Battery size.

Power Requirement

Power requirement is one of the most essential features you should consider before you buy an inverter. In other words, to run all the electrical appliances (like tube light, fan, TV, CFL, etc,.) at the time of power failure, it needs to lead with the power requirements. It is the additional power consumed by various electrical equipment.

Appliance power consumption is determined equally by time:

Time Operated In Hours * Watts = Power Consumption

VA rating of the inverter

VA – it denotes the Volt Ampere rating, it is about the voltage and current supplied from the inverter to the appliances. Theoretically, inverter efficiency and power output are directly proportional. This means if the efficiency is 100%, then the power requirement and the power supplied by the inverter are the same.

But the fact is, ideal condition or 100% efficiency is not possible. In reality, most of the inverters have an average efficiency range from 60% to 80%. This efficiency if known as the power factor. The power factor is calculated by the ratio of the power requirement of the appliance to the power supplied by the inverter.

VA rating or the power supplied by the inverter = Power consumed by the appliances in Watts / Power factor (efficiency)

For instance, here is how to find the power requirement. If you want 2 Tube Lights, 2 Fans, and 1 TV to work at the time fo power, then you need to calculate it as follows.

Tube Light Power use: 60 W
Ceiling Fan Power use: 65 W
LED/LCD Display Power use: 120 W

So the power requirement: (60+65+120) = 245 W (power requirement for one hour).

VA rating or the power supplied by the inverter = 245/0.7 = 350 VA. (here the average efficiency is considered as 0.7)

So with 350 VA requirements, you will require 400 VA will be the right choice for your home. This is how you have to select the inverter.


The battery is the fundamental unit of an inverter system. The performance, efficiency, and life span of an inverter depends on the battery quality. Based on the battery capacity, you can determine the number of back up hours. You can find batteries with different capacities starting from 100 Ah, 150 Ah, 180 Ah, etc. So now the question is how to find which one is needed?

You can find it with a simple reverse calculation. For instance consider you need back up for 3 hours, the battery voltage be 12 V, and consider the power required to be 535 Watts. Then,

Battery capacity = (Power required * Back up time) / Battery Voltage

Battery capacity = (535*3)/12 = 133Ah.

Hence you can select 130 Ah battery capacity.

Note: The calculation given here are just examples. When you make the calculation, it is recommended to use the accurate values.

We provided you with such calculations so that no inverter dealers can’t mislead you and to make sure that you are making the correct decision.

When it comes to appliances like refrigerators, air conditioners, and those things that have motors in their compressors, it requires a huge amount of current to start. If you want such devices to run when the power cuts, then you should increase the battery’s VA rating and size.

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