Inverter Buying Guide: How to Choose the Best Inverter for Home Use

Choosing an inverter for a home is quite difficult as there are a lot of inverters available in market at different price. In this inverter buying guide we will explain How to Choose the Best Inverter for Home Use.

Types of Inverters

There are different types of inverters, each with specific advantages and applications. Understanding these types will help you choose the most suitable one for your needs.

1. Pure Sine Wave Inverters:

Pure sine wave inverters produce a smooth, clean, and consistent wave output, similar to the power supplied by the grid. They are the most reliable and efficient type of inverters.

Applications: Suitable for all types of appliances, especially sensitive electronics such as laptops, refrigerators, microwaves, and medical equipment.


Provides clean and stable power.

  • Reduces noise in appliances.
  • Increases the lifespan of connected devices.
  • Efficient performance even with high-end electronics.


  • More expensive compared to other types.
  • Slightly larger in size.

Modified Sine Wave Inverters:

Modified sine wave inverters produce a waveform that is a rough approximation of a pure sine wave. They are more affordable and can run most household appliances efficiently.

Applications: Suitable for less sensitive devices such as lights, fans, and simple power tools.


  • Cheaper than pure sine wave inverters.
  • Adequate for basic household appliances.


  • Can produce a humming noise in some appliances.
  • May reduce the efficiency of certain devices.
  • Not ideal for sensitive electronics.

Square Wave Inverters:

Square wave inverters produce a square-shaped wave output. They are the simplest and cheapest type of inverters but are not suitable for most modern appliances.

Applications: Suitable for very simple appliances like incandescent bulbs and certain heating devices.


  • Most affordable option.
  • Simple design.


  • Not suitable for most household appliances.
  • Can cause damage to sensitive electronics.
  • Produces more noise and heat.

Inverter Buying Guide: How to Choose the Best Inverter for Home Use

Choosing the best inverter for home use involves several key considerations, including power requirements, inverter types, battery selection, brand, features, installation, budget, energy efficiency, and user reviews. Here’s a Inverter Buying Guide to help you make an informed decision:

1. Determine Your Power Requirements

Understanding your power needs is the first step in selecting the right inverter for your home. Here’s how to calculate your total load:

  • List All Appliances: Make a list of all the electrical appliances you need to power during an outage, such as lights, fans, refrigerators, televisions, computers, and other essential devices.
  • Check Wattage: Find out the wattage rating of each appliance. This information is usually available on the appliance itself or in the user manual.
  • Total Load Calculation: Add up the wattages of all the listed appliances to determine the total load. For example, if you have 4 LED bulbs (10W each), 3 ceiling fans (70W each), and 1 TV (100W), the total load will be calculated as follows:
    • LED bulbs: 4 x 10W = 40W
    • Ceiling fans: 3 x 70W = 210W
    • TV: 100W
    • Total Load: 40W + 210W + 100W = 350W

2. Types of Inverters

There are different types of inverters available, each with its own advantages and suitable applications:

  • Pure Sine Wave Inverters: These inverters provide a stable and clean power supply similar to the grid power. They are ideal for sensitive and high-end appliances like refrigerators, computers, and televisions. Pure sine wave inverters are more expensive but ensure the longevity and efficient performance of your appliances.
  • Modified Sine Wave Inverters: These are less expensive and work well with less sensitive devices like lights and fans. However, they might cause issues with certain appliances, such as buzzing sounds or reduced efficiency.
  • Square Wave Inverters: These are the cheapest option but are not suitable for most home appliances due to their noisy operation and potential to damage electronic devices.

3. Battery Selection

The battery is a crucial component of the inverter system. The type and capacity of the battery determine the backup time and performance:

  • Battery Type:
    • Lead-Acid Batteries: These are the most common and economical type. They require regular maintenance, including topping up with distilled water and ensuring proper ventilation.
    • Tubular Batteries: These batteries are more durable and require less maintenance compared to lead-acid batteries. They have a longer lifespan and are ideal for regular and prolonged power cuts.
    • Maintenance-Free Batteries: These sealed batteries do not require regular maintenance and are convenient to use, although they are more expensive than lead-acid batteries.
  • Battery Capacity: Battery capacity is measured in Ampere Hours (Ah). A higher Ah rating means a longer backup time. For home use, common battery capacities range from 100Ah to 200Ah.
  • Battery Voltage: Most inverters require 12V or 24V batteries. Ensure that the battery voltage matches the inverter’s requirements.

4. Inverter Capacity

The capacity of an inverter is measured in Volt-Amps (VA). To determine the appropriate inverter capacity for your home, consider the following:

  • Calculate Required Capacity: Using the total load calculated earlier, adjust for the efficiency of the inverter. Typically, inverters have an efficiency of about 80%. For a total load of 350W, the required inverter capacity would be:
    • Required Inverter Capacity: 350W / 0.8 = 437.5VA (round up to 500VA)

5. Brand and Quality

Choosing a reputable brand ensures better reliability, performance, and after-sales service. Some of the popular brands known for their quality inverters include Luminous, Microtek, Sukam, Exide, and APC. Research the brands, read customer reviews, and consider the warranty and after-sales service before making a decision.

6. Inverter Features

Modern inverters come with various features that enhance their functionality and user experience:

  • Automatic Voltage Regulation (AVR): This feature helps protect appliances from voltage fluctuations, ensuring stable output.
  • LCD/LED Display: An easy-to-read display shows important information like battery level, load level, input voltage, and fault indicators.
  • Overload Protection: This feature automatically shuts off the inverter in case of an overload, preventing damage to the inverter and connected appliances.
  • Battery Charging Time: Consider inverters with faster charging capabilities to ensure that the battery gets charged quickly during power availability.

7. Installation and Space

Proper installation is crucial for the safe and efficient operation of the inverter system. Here are some points to consider:

  • Ventilation: Ensure that the inverter and battery are placed in a well-ventilated area to prevent overheating.
  • Space: Allocate enough space for the inverter and battery setup. The area should be dry, clean, and free from dust.
  • Professional Installation: It is recommended to have the inverter system installed by a professional to ensure safety and compliance with electrical standards.

8. Budget

Inverters come in a wide range of prices. Balance between features, quality, and budget is essential. While it might be tempting to go for a cheaper option, investing in a good quality inverter and battery will save you money in the long run through better performance and durability.

9. Energy Efficiency

Energy-efficient inverters can help reduce electricity bills. Look for inverters with high energy efficiency ratings. In some regions, inverters come with energy efficiency labels that can guide your choice.

10. User Reviews and Recommendations

Research online reviews and ask for recommendations from friends, family, or neighbors who have experience with inverters. User reviews can provide insights into the reliability, performance, and after-sales service of different brands and models.

Example Calculation

To illustrate the process of selecting an inverter, let’s go through an example:

Assume you want to power the following devices during an outage:

  • 4 LED bulbs (10W each)
  • 3 ceiling fans (70W each)
  • 1 TV (100W)

Total Load Calculation:

  • LED bulbs: 4 x 10W = 40W
  • Ceiling fans: 3 x 70W = 210W
  • TV: 100W
  • Total Load: 40W + 210W + 100W = 350W

Considering an inverter efficiency of 80%:

  • Required Inverter Capacity: 350W / 0.8 = 437.5VA (round up to 500VA)

Battery Selection:

  • Suppose you want 5 hours of backup.
  • Required battery capacity = (Total Load x Backup Hours) / Battery Voltage
  • = (350W x 5 hours) / 12V
  • = 1750 / 12
  • = 145.83Ah (round up to 150Ah)

For this example, you would need a 500VA inverter with a 150Ah, 12V battery to meet your power backup requirements effectively.

By following this inverter buying guide, you can choose the best inverter for your home, ensuring a reliable power backup solution that meets your specific needs. Remember to balance your immediate needs with long-term reliability and efficiency to get the best value for your investment.

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