​Difference Between UPS and Inverter

​Difference Between UPS and Inverter

Difference Between UPS and Inverter

Difference Between UPS and Inverter


Today electricity has become a necessity. All most all of our day to day works requires electricity. We need electricity for laptops, washing machines, electric cookers, Mobile phones, Coolers, etc. If this electricity gets shut down it will cause great disorder. To smoothly run these devices even after the blackout of electricity and get uninterrupted, electrical power systems are discovered. UPS and Inverter are an example of such discoveries. Although these devices work for the same intention, however, people remain confused with the difference between a UPS and an inverter, and they wonder what makes them different. This article will highlight the differences between these two devices so that you can make better use of them, having known their features. Before looking into their differences lets know more about there working. 


UPS stands for Uninterrupted Power Supply. As the name implies, it is used to stop the interruption caused to devices during the blackout of electricity. This system is mainly used with computers where it provides the computer sufficient amount of power to save the data and safely shut down when sudden power blackout occurs.

UPS consists of a rectifier to convert AC into DC and charge the battery. This battery is connected to the inverter which converts the DC into AC. A controller is provided to control the functioning of the system.

UPS can provide power supply only up to 10 to 15 minutes. So, this is mainly intended for IT systems and electronic devices that can get damaged with sudden power out conditions.


Inverters are power electronic devices. The main purpose of these device is to convert DC to AC. In inverters, AC power supply is taken from AC mains and converted into DC by a rectifier.

This converted DC charges a battery. As the industrial and household systems work on AC power, the DC from the battery is converted into AC by the inverter. During the power cut, the inverter receives supply from the battery and provides power supply to the electrical equipment. These systems are used in the household to get the power supply after the blackout of electricity. For working of Inverters, no external power supply is needed.

Key Differences Between UPS and Inverter

1) Use Case & Backup Time

If you don’t have power cuts often, you can use a UPS to safeguard your computer from any major hardware failure. The switch to UPS is almost instant, and this doesn’t shut down your computer. UPS typically offers a backup of around 30 minutes or so.

The switching of UPS from the mains supply to the battery is immediate, whereas the Inverter takes more than UPS. For computers, the switching time of inverter is more than it can handle, and it will usually reboot due to the interrupted supply. Thus, UPS are preferred for PC and Inverter for homes as lightbulbs will not care about the switching delay.

UPS can provide backup for your devices for around 15 minutes, whereas an Inverter can provide backup for hours depending on its capacity. The inverter allows you to power the complete house depending on the capacity. So if your area has a more extended power cut, you can use it at least keep a couple of lights and fan running.

2) Maintenance & Lifespan

UPS are maintenance-free. Inverters need more wiring and need to be filled with distilled water at regular intervals. However, I have noticed that some of the advanced versions of inverters have freed consumers from distilled water maintenance.

The disadvantage of UPS is that since the battery is continuously being charged and discharged even when there’s no power cut. Because of this, the battery will wear out 4-5 times quicker than inverter battery.

3) Price

Compared to Inverters, UPS are cheaper. There are different types of UPS and inverters available, and they are available at competing prices.

The factors to look into when buying them includes backup time, capacity, charging time, power requirement, crating (quantity of charge in a fully charged cell), and warranties.

UPS and Inverter Banner

Other difference between the two devices is that UPS has a rectifier for providing the backup power to the system whereas the inverter converts DC into AC.

The main function of the UPS is to store the electric supply whereas the inverter converts the AC power into DC power.

During the power outages, the UPS immediately switch over from the main supply to the battery whereas the inverter has a time delay.

The UPS provides the electrical backup power, and the inverter provides the electronics backup power supply.

The Offline, Online and Line Interruptive are the types of the UPS whereas the inverter is of two types, i.e., the standby inverter and Grid tie inverter.

The UPS is directly connected to the home appliances whereas the inverter is first linked to the battery and then attached to the appliances circuit.

The UPS is more expensive as compared to the inverter.

The rectifier and battery are inbuilt in the circuit of UPS. The rectifier converts the AC into DC and stores the energy into battery whereas the inverter has an external battery for storing the DC power.

The UPS provides the backup supply for very short duration whereas the inverter supplies the power for an extended period.

The UPS does not have voltage fluctuation because their input is independent of the output supply whereas the inverter has voltage variation.

The UPS is used for the domestic purpose, in offices and industries whereas the inverter is used in the office.

Though designed with the same aim to substitute electricity, inverters, and UPS differ in their working principle, type of application and power sources. UPS have complex wiring and are expensive. Whereas generators and inverters are less expensive.

UPS contains built-in batteries whereas for inverters batteries are external. While UPS is directly plugged into appliances, inverters are connected to the main power line of the household to send power to appliances. Though the working of inverter and UPS are similar the main difference is time taken by them to switch ON.

After detecting an interruption in power UPS is switched ON immediately whereas inverter uses some delay to switch ON. Thus UPS is used for sensitive systems such as a computer which cannot afford the sudden power loss.


In our daily lives, we are heavily dependent upon appliances that run on electricity such as fans, lights, Laptops, AC, fridge, and so on. Inverters and UPS are used to support power supplies when there is power outage either from the Supply Authority or Generator House.

Typically, A UPS is a device that helps in keeping an electrical system for some minutes whenever there is power failure. It makes use of battery which helps to continue power when there is power outage.

While an Inverter is an electronic gadgets which is used to supply power by converting the direct current of a battery into alternating current. Whenever there is a power cut, electricity supply to these appliances is cut off and they stop working. However, if you have a backup supply in the form of devices such as UPS or inverter, you have ensured uninterrupted supply of power to your appliances and will not be upset with power cuts. The major difference however between this two devices is that, Inverter is not able to provide any supply but through DC source only.

If you need prolonged backup power for your home or business, or you wish to protect your sensitive equipment at all times, contact GZ Industrial Supplies today. We have the best UPS and Inverter from notable brands in stock. 

Jan 06, 2021 Anthony Ubong

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