For those not in the know, there are numerous UPS Systems that have been designed to keep electrical devices operating during power outages.

The many kinds of UPS offerings could cause much confusion among consumers; therefore, it is advisable to investigate all options these thoroughly to make the right choices.

Although it is widely thought that there are only two kinds of UPS systems, there are more systems on offer. There is a wide range of UPS types and their applications with each one having its very own unique characteristics.

There are five approaches to UPS systems

  • Basic Standby UPS
  • Standby-Ferro UPS
  • Double Conversion On-Line UPS
  • Delta Conversion On-Line UPS
  • Line Interactive UPS

Basic Standby UPS

Basic Standby UPS delivers battery-sourced, short-term power during power outages. The hardware receives power directly from the utility through an AC connection. The UPS will store the power until the backup power is required. The Basic Standby UPS is most often used in the application for the protection of computers, modems, and other sensitive electronic equipment and is the most cost-effective.

Standby-Ferro UPS

In the standby-Ferro design, the inverter is always in the standby mode and is put into motion when the input power fails when the transfer switch is opened.

Double Conversion On-Line UPS

The only difference between the Double Conversion On-Line UPS and Standby UPS is that the main source of power is the inverter instead of the AC mains.

Delta Conversion On-Line UPS

Delta Conversion Online UPS offers a more advanced innovation that eradicates the shortcomings of the outmoded Double Conversion Online UPS, with the improvements based on having a delta inverter and enabling bidirectional movement of power.

The variety of UPS Systems is vast – therefore, making the right choice will make a difference at the end of the day. For more information regarding the different UPS applications, contact your service provider to ensure you make the right choices.


An inverter and a UPS system both supply backup power to electrical devices; however, the primary difference between the two is that the UPS from the main supply to the battery is instantaneous, whereas the supply of power from the inverter to electrical devices will take a few seconds before the power will kick in.


Your inverter will convert your DC power into AC power during unstable power situations. Power from an inverter is stored inside a battery. Depending on the configuration of the circuit and the design of the inverter, the output will put out pulse sine waves, sine waves or square waves.


UPS protects sensitive electrical devices from hikes and dips. The UPS converts AC power to DC power through a rectifier and converts the DC power into AC power through an inverter. Power is instantaneous.

Ten differences between an inverter and an Online UPS System

  • The Inverter will convert AC power into DC power. An Online UPS uses a rectifier to provide the backup power to an electrical device which is instantaneous
  • Inverters delay the conversion of power by a couple of seconds which means that the power is not instantaneous
  • A UPS System is connected directly to appliances; inverters are connected to a battery which will be attached to the electrical circuit (hence the delay of a couple of seconds)
  • An inverter is a more cost-effective option; a UPS System, on the other hand, is a more costly option
  • The configuration of the UPS System includes a battery and rectifier that are built in; the rectifier in the UPS System stores power which converts the power from AC to DC during outages
  • Inverters, on the other hand, have external batteries that store DC power
  • Inverters have the capacity to supply DC power for longer periods of time; more so than UPS Systems
  • An inverter’s power supply could fluctuate and is less stable than that of a UPS System
  • Applications for UPS systems are usually applied to functioning in office, home and industrial environments, whereas inverters are usually used in office environments

Inverters have a definite use in numerous environments as do UPS systems, whether they are Online systems or Offline.


When choosing your UPS System, bear in mind that it is not about how much it costs, as the cheapest is not always best. The most pressing need would be to match up the size of the UPS system required to that of the equipment you are planning to support and what needs to be powered when there are dips and surges, brownouts and blackouts.

The where, what and how of your UPS System

You need to ask yourself a couple of pertinent questions before investing in a UPS System

  • What type of UPS System will you need to keep your world powered? Will it be the less expensive Offline UPS option that is not as accurate as the Online version, or will it be the more accurate Online UPS version that could cost more but will be more stable?
  • The UPS System that you need to select will have to have enough power for all the devices you are planning on keeping running during power hikes and dips, brownouts and blackouts
  • Compiling a list of the most pressing electrical issues you need to address is the most practical method moving forward when shopping around for UPS backup systems
  • For your UPS System to run at its optimum you need to match like with like; in other words, the one that is large enough to keep everything going
  • It is important to find out the UPS capacity as this will determine exactly how large your UPS System should be
  • UPS Systems are measured in Watts – the higher the capacity the more electrical devices it will be able to power
  • Calculate the load to find out the UPS Capacity for accuracy
  • To determine the load, it is advisable to add up all the watts each device uses or contact the manufacturer; alternatively contact the manual

Medical institutions, production houses, schools, universities, libraries, restaurants, businesses both large and small simply cannot afford to have the power go off as this could prove to be detrimental to the business and will lead to loss of earnings.

When the power goes off and comes back on causing huge hikes, it could damage sensitive machinery and electrical devices beyond repair – invest in an accurate UPS System to ensure your devices are kept running and protected at all times.



There are differences between Online and Offline Systems – the big question is  – what are they and what are the biggest challenges and advantages that we could face by incorporating these devices to keep our electric up and running all the time. The power utility, Eskom, is constantly in the news and is obviously facing huge challenges to keep our lights switched on, but for most of us running homes and businesses, not having power could prove to be a huge issue.

Investing in devices to protect our devices and keeping on the lights takes a little bit of creativity, and investigating the options could prove to be the solutions for many of us faced with a future with erratic power that could cause damage to our sensitive equipment whether this means blowing your TV and PC or simply keeping that necessary fan or stove up and running.

Most of us are aware that there are two different types of UPS Systems (Uninterruptible Power Supply Systems); these include Online and Offline UPS Systems.

The commonality between the two, is, naturally, to provide a reliable backup of power when the lights go out or when they dip or hike.

Online UPS Explained

  • Your Online UPS System is different to the Offline system in that the power is derived directly from power-conditioning components
  • Your Online UPS System is not directly connected to the power utility
  • The power is stored in a battery so that when the power goes off power is drawn from the battery
  • This power is then converted into AC power to continue the operation of household and other electrical devices
  • Online UPS is Double Conversion UPS
  • The main applications for the use of your Online UPS system will usually be in critical care environments and production houses where the continuation of power is vital

Online UPS advantages

  • Online UPS can regulate the voltage correctly
  • The mains and load are presented separately
  • There are no fluctuations (dips and surges) in the voltage, which means that the quality of the voltage is stable
  • The reason for this is that the inverter is always switched into the “on” position
  • The conversion time from DC to AC is negligible (the same reason being that the inverter is never switched off)
  • When the utility power goes down there will be a continuation of power and no imbalances will be noted

Offline UPS Explained

  • Your Offline UPS System is a straightforward, inexpensive option to keep the power on and is directed through the UPS bypassing the inverter to the device.
  • There is a small amount of filter to protect against instability.
  • If the utility is unstable or goes down your Offline UPS System will switch to the inverter’s output to provide constant and a continuous power supply

Offline UPS Advantages

  • Your Offline UPS System is user-friendly and straightforward to operate
  • Offline UPS is less expensive than the Online UPS option

Advantages of offline UPS

  1. The efficiency of this system is high. This is because the charger is not constantly on.
  2. These are affordably priced.
  3. Internal controller is simpler.
  4. The power handling capacity of the charger is greatly decreased.
  5. Applications using offline UPS include emergency power supplies, printers, computers, EPABX, scanners, etc.

Often households opt for offline UPS systems than their online counterparts because of the higher energy efficiency and economical nature of the former. However, households that use highly critical loads should opt for the latter so that sensitive electrical appliances and data are protected.

Those who are looking to buy UPS, either online or offline systems, are invited to make their purchases from Glowship, India’s largest online platform selling home utility solutions. We offer wide selection of top products from the reputed brands at the best possible prices. There are also a lot of other products like water pumps, solar solutions, LED lights, dewatering pumps, water softeners, water heaters, water purifiers, inverters, batteries, security solutions, and many more available with us. You are welcome!