UPS (Uninterpreted Power Supply) Buying Guide for Pakistan

Summer season is about to begin in Pakistan and we all should be prepare to face load shedding. Its the fifth year of government chosen by the public of Pakistan and still they have no solution to overcome this problem. The only solution available to general public is UPS(Uninterpreted Power Supply) but the problem is that UPS comes in many shapes & sizes and the cruel part is that many shopkeepers selling inverters as UPS which is totally wrong. Lack of knowledge and illiteracy in Pakistan help theses shopkeepers to easy fool common people and make huge profits.

Difference between UPS and Inverter:

One of the main complaints by the Pakistani users regarding UPS is that their computer restarts when ever light goes from Wapda power station. Now if you are a one of those who buy inverter rather than UPS than its your inverter fault not your computer fault or any thing else. The reason is that inverter takes 300 to 800 milliseconds for switching from Main power to Battery power and its not enough to remain your computer power-on while the shift.

So the solution is clearly a Good UPS which has normally 3 to 8 milliseconds shift time from main power to battery power. Now some of you might have brought Chinese UPS and saying that i have good UPS but still my computer restarts. Unfortunately the Chinese UPS available in the market are also Inverters not UPS.

Now you may have heard from your relatives or friends saying that they are using Pakistani home made UPS and its working perfectly fine for them. One thing i will tell you here that inverters are good for some home electronics like Fans, Energy Savers and Bulbs but they are not made for Home Appliances like Television, Refrigerators or Computers.

UPS Uninterpreted Power Supply Pakistan

Why Choose UPS Instead of Inverter?

  • UPS provide purified Sine-Wave output as compared to the Inverter’s square wave output which is good for your sensitive home appliances like Television, Refrigerators or Computers.
  • UPS are good for your charging devices like Mobile and Laptops but inverters are battery killers and if charge laptop or Mobile on your inverter than get ready for dead battery.
  • Uninterpreted Power Supply normally provide constant 60HZ of frequency which is good for your appliances where as inverter frequency depends on battery condition and load which may burn your expensive equipment.
  • If there is light problem in your area like low light or light comes on or off very quickly than inverter also not be able to handle this situation and can damage your appliances.

UPS Purchasing Guide:

Now that you know the difference between UPS and Inverter its time for you to search the market for quality UPS according to your needs. If you want to use it with your computer than definitely you want branded high quality UPS otherwise it will restart your PC.

Make sure to check whether the battery timing of the UPS is good or not by checking the Auto Voltage Control 3 Strip Charging system feature on the manual.

Some UPS available in the market are not capable of displaying LED or Alarms which are very good to protect your product. Always go for the LED UPS or which can display at-least light bulbs according to battery timings.

There are some new UPS available in the market which are very efficient like they will not make your battery hot, you don’t have to put water into your battery, your fans will not make noise, Fans speed can be controlled via Dimmer, can prolong your battery life, protects your mobile chargers and laptop battery from damaging etc.

UPS Planning and Installation:

First of all make sure that the place where you want to put your UPS is away from water and always keep dry. You need some kind of insulation material like Wood, Foam or hard broad so that you first put these material and than put UPS on it. Its better to pick a place near your main board if you want to plan your whole house for UPS but you can also choose a place if you are planning to only connect it with your Computer or Television.

You also need to calculate the power consumption of appliances that you want to connect with your UPS. For calculation you can use this formula: (VA)Watts = Volts x Amps

Before connecting your new battery to the UPS for the first make sure that your battery is fully charged otherwise its life and backup time will be reduced.

Usually a 500W UPS can easily run 1 * Computer + 3 * Energy Savers + 2 * Fans. So you can also calculate your needs from this if you are not good enough calculating Volts and Watts.

ups wiring diagram

Battery Timing depends on UPS or Battery:

Lots of people ask this question that battery timing depends on Uninterpreted Power Supply unit or on Battery and the answer to this question is very simple and that it on battery. No matter how high you UPS is i.e 1000 Watts or 2000 Watts if it has small battery than it will give small backup time but if you have 500 Watts UPS with large battery i.e 155 Amps than it can give you long battery timings of up to 8-10 hours depending upon the condition of the battery.

  1. Daniyal @ hd wallpapers collection says:

    nice post. i was unawre of inverter

    • Mohsin Ali Waheed says:

      Daniyal that is the biggest problem with common people that they don’t even know the basic and shopkeepers make us fool easily.

  2. kamal ashraf says:

    wao, amazing article, i was planning to buy a ups, now i am able to do this.

  3. Maqbool says:

    One thing i want to ask you is that you have said that computer restarts when the light gone from Power house. What does this mean light alwasy gone from power station.

    • Mohsin Ali Waheed says:

      Maqbool you have asked very good question. I forget to mention in the article that when ever you switch off your inverter(UPS) its doesn’t turn off your computer neither when you turn off your electricity from your main board switch. So its very important that you check the Inverter(UPS) for 2 to 3 days and if it works also when the light goes off from power station than you pay full money.

  4. Azmat says:

    It is very informative article specially for those people who are planing to purchase UPS.I like this article very much as i have my own electronic Lab.And i deals in UPS.I design and Make new Ups according to customers need with maximum back up time of up 10 hours.
    My UPS have all the feature which you reed in this very informative article like

    Battery Level indicator
    Over load Protection
    Over charge protection
    longer Back up Time
    computer does not restart.
    6 month free service warranty.
    I am from Sialkot if you want to purchase new UPS or just want to have any information about UPS YOU can Contact me at
    [email protected]
    or you can call me at 009203348084755

  5. Hammad says:

    Nice guide but you have’t suggested any brand or model so that we can buy it from market. I am going to buy a Homage UPS what you say about it.

    • Mohsin Ali Waheed says:

      Hammad i cannot suggest any particular brand here but the product name you suggest is not very reliable and Chinese made.

  6. Multan says:

    Very nice article Mohsin bhai.
    Can you please, Share the estimated price of things, which are need for a System of 1000w (2 FAN, 1 Lap, 2 Energy Saver), What are good batteries, normal or gel cell?

    any idea about living ‘off the grid’ with Solar Power?

  7. Yasir Imran says:

    Have you experience this product yourself?

    • Mohsin Ali Waheed says:

      Yasir i am not endorsing any product here. Just to give an idea to common people so that they can choose better product.

  8. Farhan @ online jobs students says:

    Hello dude,

    You mentioned that frequency is 60 HZ but in Pakistan it is 50 Hz not 60. Please correct it.

    Source: I am an electrical engineering student.

    Farhan shahid

    • Mohsin Ali Waheed says:

      Farhan the above mention data i collected from another electrical engineer and he told me this number.

      • Sameer Aslam says:

        Being a communications engineer myself I think you should correct the
        60Hz notion.
        Pk And India use 220V at 50Hz.
        If an electrical engineer told you that , then he needs to brush up his skills
        man.Because if he is at NPCC ;D , then country outages will become a

  9. ZiaUllah Ch. says:

    Very simple, brief and comprehensive article. You are genius and Allah Bless you Brother Moshin Ali.

    ZiaUllah Ch. Engineer
    Jeddah Saudi Arabia

  10. shoaib says:

    bhai main 1500 watt se leka 2000 watt tak ka ups bana chahta hoon keya app meri help karen ghe pllzzz mujhe email karke bata dain …ok

  11. Javed Iqbal says:

    I need your assistance if possible for you. I have 3000W (12VDC/230V/10-15Amps) build in battery charger pure sine waves American made inverter which is very successfully functioning with electro mechanical power changeover contractor switch (relay).
    I like to replace its electro mechanical contractor switch with the electronic component named SCR to minimize the power change over time for the computer backup power stability. Need the diagram with the SCR rating so I can modify.
    Best Wishes
    Javed Iqbal
    [email protected]

  12. Arshad Sheikh says:

    Respected Sir,
    I have to purchase a new UPS in the market but after reading your wise article still I am not clear to purchase which one? Would you like me to inform which model or company. I f I want to make it from yourself. Can I.

    Specification of UPS is as under.
    24 volt 2000va

  13. rao sajjad says:

    This artical is worth shearing. I like it. I think you should add the name of some of imported ups. Over all very nice work

  14. Sameer Aslam says:

    The formula VA (WATTS)= Volts x Amps is a general misintrepretation of the formula.

    When going to buy UPS, remember=
    1200 VA= 720 Watts approx. or
    1000 VA= 600 Watts. approx (should give higher than this.)

    Because VA (Volts x Amps) is associated to apparent Power (Voltage on circuit “times” the current being drawn by that circuit) while Watts is real Power (The actual P=IV where real power takes elements such as heat/loss into account). VA is therefore usually larger or equal to Watts.

    Note that the ratio to the two is Power Factor or
    P.F= Real Power / Apparent Power
    :- where P.F should be .7

    You’re welcome 🙂

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