How to Choose Best Inverter For Home

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Power cuts are a common occurrence in Indian households and if you are frustrated with frequent power outages, you should plan to invest in an inverter for your home. When choosing You should choose the best inverter and battery for home according to your needs as it should be based on the power requirements. So a little research and understanding the basics will help you buy the right inverter for your home. 

How to Choose Best Inverter For Home
How to Choose Best Inverter For Home

 

Power backup solutions are popularly known as power inverters in India. Choosing the right inverter and battery are critical decision factors in creating the right power backup solution.  

How to Choose Best Inverter For Home 

However, choosing the right inverter and battery is a challenge that is fatal to it. So, here is a simple 3-step guideline to find the best 'inverter + battery' for your power needs-  

Step 1: 

Identify your power requirements 

Don't get confused by the word 'identity'. It is not rocket science. List the appliances you want to run on inverter power. Suppose you plan to add 2 tube lights (60 watts), 1 fan (70 watts) and 2 CFLs (40 watts). In this scenario, your total power requirement would be: 60 + 70 + 40 = 170 watts  

Step 2: 

Check the VA rating of the inverter 

First understand your Power Requirement One of the most important factor that you must know before buying an inverter is your “Power requirement”. In simple words- what all electrical appliances (like fan, tube lights, television, CFL etc.) you want to run at the time of power failure. 

The power requirement is addition of the power consumed by various electrical equipments

Suppose you want 2 Fans, 4 Tube lights, 1 CFL & 1 television to operate at the time of power failure. 

Below is the power consumed by these items: 

1 Fan – 70 Watts 

1 Tube light – 60 watts 

1 CFL – 25 watts 

1 Television – 120 watts 

Therefore your total power requirement is ( 2*70 +4*60 + 25 + 120) = 525 watts Now, the next step is to purchase an inverter with the correct volt ampere (VA) rating. VA stands for voltage and current supplied by the inverter to the equipment. So, how do we determine how much VA is sufficient for our electricity needs? 

This can be better explained by the following equation ie, the ratio of the power factor of the inverter to the total power requirement by the equipment. VA = Power Requirement/Power Factor Power factor is nothing but the ratio of the power required by the electrical equipment supplied by the inverter. Average power factor of inverter is 0.7 or 0.8. VA= 170/0.7 VA= 242.85 approx. So, in our scenario we are looking for an inverter of around 250 VA 

Step 3: 

Get the right battery for the inverter 

A suitable battery is the backbone of the inverter. This extends the performance and life of the inverter. Now, we come to the main question - "How long will the inverter provide back-up for the equipment?" This question is answered by the battery capacity which determines the back-up time expressed in ampere hours (Ah). So, how to determine battery capacity? Let's say you need 6 hours of back-up.  

What size inverter do I need for my home? 

The size of sine wave inverter you should buy for your home depends on your equipment and total power requirement or power load. You need to do your calculations to determine how many tools you want to run simultaneously and how much continuous power (in watts) your tools need. 

In addition, you will also need to calculate the power draw or power surge demand of your tools while starting up. 

For example, simple appliances like TVs and computers have lower power consumption than refrigerators and power drills. Buying a smaller power inverter will create a deficit that will affect how many devices you can use at once. You can find all this information on the nameplate of your tools. The information you'll find on the nameplate will be presented in volts and amps or watts, and adding that gives you the total power requirement. 

You can convert volts and amps measurements to get watts using this formula. (V x A = W). Determine the power gain of your tools by measuring with an ammeter or by approximating the continuous wattage multiplied by three. However, keep in mind that this number can go up to seven times.  

Also Read : 6 Best Power Inverter

How to choose the best inverter battery for home 

Battery is the main component of inverter. The life of the inverter and its performance depends on the quality of the battery. The battery determines how long the inverter can supply power to your devices after a power cut. Battery capacity determines the number of hours of backup provided for inverter operation. 

There are many batteries available in the market ranging from 100Ah to 180 Ah. After determining the power requirements, you should calculate the battery backup required for your home. For example, if you want a 2 hour backup Battery capacity is calculated using the following formula. Number of Watts Required * Battery Backup/Voltage Hours Considering the previous power requirement of 310 watts Battery capacity = 310*2/ 12 = 51 Ah so 100Ah battery will be most suitable for your house.

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