Tips for Buying a UPS

Your expensive computer and the more important data in it could be rendered useless due to power surges, spikes and brownouts. This is exactly why it’s best to have a UPS (which comes with a built-in voltage stabilizer blocking energy surges that could damage your computer) that is designed to firewall you against such power disturbances and more importantly, power up your computer even when there is no electricity. Here are a few tips that should help you make a more informed UPS purchasing decision.

1. Power points

When purchasing a UPS, make sure the power rating is right for your equipment. If you buy one that is rated too low, you might run out of juice before you can power down. Most UPS devices are designed to provide 10 minutes of power. When selecting a UPS, you need to look at the VA rating — or amps multiplied by voltage (120v). The amp rating should be listed on your computer. Add up the VA ratings of everything you will connect to the UPS, then purchase a UPS with a VA rating 20-25% higher. If you are a home PC user, look for a UPS with a 500-700 VA rating.

2. Backup time

Don’t expect your UPS to keep your PC running all day. Most UPSes are engineered to provide you a backup time of around 10 to 20 minutes. What they essentially do is save your work when there is a power outage and avoid an abrupt shutdown that could mess up your computer settings. Choose the UPS that meets your backup time demands.

3. Other features of a UPS

When you are buying a UPS, ask the vendor about more features than just power. This will help you in finding the UPS which has that one additional option that will help you in your buying decision. Of course, the best feature is Automatic Voltage Regulation (AVR) which isolates your PC from voltage fluctuations that lead to computer disturbances. A UPS with AVR conditions the incoming power before being fed to the PC’s Switch Mode Power Supply (SMPS). Most UPSes also automatically initiate a scheduled shutdown sequence when the power is lost, after saving your work, to prevent damage to the computer hardware.

4. Warranty

Obtain a guarantee before buying a UPS. Undue delays in replacements can affect business. Some vendors offer onsite warranties, where they replace the batteries at your place. If you are planning to use the UPS at work, go for a longer warranty term.

5. Don’t compare SMPS and UPS rating

Even if the SMPS carries a high rating, your UPS needn’t be competitive. A 600 VA rating on a UPS should be fine for most systems. So don’t go on a VA shopping frenzy. Relax.

6. Battery replacement

The general rule is three years. But if you are experiencing low backup times more frequently, you could get the battery replaced immediately if it’s under warranty. If you are facing no problems, expect your battery to work for three years. Its advisable to buy replacement battery cartridges while you are buying the UPS. These cartridges will breathe new life into UPS systems suffering from expired or weak internal batteries. They cost about $30.

7. Power up

Contrary to the myth, its perfectly fine to leave the main switch on even when you are no longer working and the computer is shut down. However, its best to pair your UPS with a voltage stabilizer for additional safety.

8. Software reports

The software provided with the UPS is not always accurate with its reports. So don’t listen to it when it says your battery needs to be replaced even though you’ve never experienced low backup times. These faulty reports shouldn’t worry you because they may be trying to get you to purchase the company’s product more frequently (a common problem with print cartridges.) The software is good at its essential function of shutting down the PC properly and saving your work, but you may be the best option to determine whether its time to change the battery.

9. Usage tips and tricks

Do not overload the UPS by, for example, connecting external devices like the printer, scanner and the fax machine. NEVER plug a printer into the battery backup system. To optimize the charge of your batteries, you should discharge them completely at least once a month. And lastly, make sure the UPS is properly grounded all the time to prevent any electrical disasters.

10. Compare the prices

Standby UPSs are available in the range of 300VA to 500VA for office use, and up to 2KVA to 3KVA for workstations and large servers. Inexpensive standby UPSs ranging in price from $50 to $125 are used by millions of users of personal computers all over the world. Some of them include brands like Belkin, American Power Conversion (APC), Cyber Power, Data Shield, EFI, NCR, SAFE, Pacific Power, Sola and UP Sonic.


Remember, there are two kinds of UPS systems. The Standby Power System (SPS) and Online UPS System. If you are a home user, go for the relatively cheaper SPS. The price of an online UPS is three to five times that of a standby UPS with the same power rating. For servers, buy an online UPS (online means outgoing power is always drawn from the battery). Expect to pay between $150 and $1,000 for an online UPS. The higher the VA rating, the more you’ll pay. You might also want to consider buying one with advanced-battery features. These features include intelligent-battery management, battery-replacement indicator, and hot-swappable user-replaceable batteries.
UPS is the easiest way to protect your hardware and data. Many people think a surge protector suffices (an electrical device which includes a fuse which does not allow a power surge to harm sensitive devices such as computers), but actually they only offer limited protection against power spikes. For a better and more thorough protection, you need a UPS. It isn’t intended to power you through a blackout though. For that, you would need a generator. Rather, a UPS will let you save your work and power down safely.


  1. When I buy UPS, I stick with the name brands on this one. APC, Tripe-lite and Belkin. APC has the best policy on battery replacement. I had one UPS fry after a power surge in one my offices and APC replaced the five year old battery with no questions. The best computer tips I can give is the one that I have experience myself. Great post on this blog.

    • Even I had an UPS fry after a power surge but the APC is asking me to go for a new UPS instead.
      Was your UPS covered under AMC or extended warranty? APC doesn’t give more than 1 year warranty for batteries.

  2. I had a similar experience with APC as well. Not only did they replace the 3 year old battery but also assisted with the disposal of the old damaged battery. I was provided with a box and return labels to ship the old battery back to them free of charge. I have not tried any other brands except APC. I have heard that Tripe-lite is now better than APC in quality. I do not only measure a company on quality but customer service and their long term warranty policy. Which company do you think is better, APC or Tripe-lite? I am going to put my money on APC on this one. How about you?

    • Hi Richard,

      I am a representative at Tripplite and i have read your comments and see you prefer APC.
      APC have incredible advertising and DO have fantastic machines. Undoubtly Tripplite have come a long way in 98 years, with not as half as much of advertising and still turning over $400 million a year. How can you decide which one is better? is to try it! ask for a test unit and see for yourselves its not just quality but fantastic customer service too. You will find key features on the the more cost effective Tripplite models than you would find on any other manufacterd UPS.

  3. Yes Richard. APC is undoubtly trust worthy UPS. But their services aren’t free. After the warranty period of 2 years we need to go for the AMC to get free replacement of the parts (batteries not included) and after 1 year from the purchase date their is no garuntee for the battries we need to get it replaced.

    I’ve no option. I had to go for the APC UPS because it is the only make of quality service and product in my locality.

  4. Well in my case, They just replaced the battery because it was originally purchased with an extended warranty. Sorry I left that part out of my comments. The second time, I did not have an extended warranty and it was still replaced free of charge. I believe I just happen to get the right customer service person on the phone to handle this for my company at the time. I will agree that APC UPS are top of the line. The customer service people were also willing to share some computer tips as most of the computers had the software for monitoring insalled but had never been configured properly. Finally, I assisted an friend in Liberia, West Africa get warrenty replacement parts but they had to pay for the shipping. It was still cheaper than replacements. Go figure. Just my two cents of computer tips and information for the day.

  5. Wow this is a neat post. I lost a computer one time because lightning struck the building during a thunderstorm, and the computer went dead, so every since then, I have always unplugged my modems and computers during thunderstorms to avoid this again. For clarification, it didn’t knock out my entire computer. Just the modem and my ethernet card.

  6. First thing one should do is to check the company whether it is old or not. If it is old and reputed one then it's fine to buy your UPS but if not then get the recommendation from the company.

  7. I found this very helpful, thank you so much!

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