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Make your own DIY 50 watt 12 VDC to 220 VAC Power Inverter UPS

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Easy Homemade 50 watt Power Inverters (12 VDC to 220 VAC) UPS

Make your own DIY 50 watt  12 VDC to 220 VAC Power Inverter UPS

Power inverter (UPS Uninterruptible power supply) is a very useful device which can convert Low voltage from a DC source to high voltage AC. The most common power inverter is 12V to 240V inverter. Perhaps that is because 12V batteries are common. This type of power inverter usually draws current from a DC battery. This battery should be able to provide a high flow of electric current. Normally lead acid batteries can server this purpose well. This current is then converted to 240V square wave alternative current so that we may empower those electric appliances which work on 240V instead of 12V. Inverter falls in the category of expensive devices so many people don’t buy them even they need them. What if I tell you how to build an inverter (UPS Uninterruptible power supply) yourself?

There are a lot of inverter circuit diagrams available online; some of them are complex and others are low performance. I designed my own inverter circuit which is comparable to any professionally made inverter but still is simple enough for you to try.

500 Watt 12DC to 220 VAC Power Inverter (UPS) Construction in Urdu 

500 Watt 12 VDC to 220 VAC Power Inverter (UPS) uninterruptible power supply (English)

Make Your Own 50 to 500 watt Inverter UPS

Watch Video with complete instruction .

Alternate video: Watch Video with complete instruction .

make your own power inverter ups (Urdu) by paksc

Here is the inverter circuit diagram:

Inverter Circuit Diagram

Download Inverter Circuit Diagram

You will need the following parts.

  • 2, metter copper wire (for winding)
  • 2 Transistors 1047
  • 2 Heat sinks to fit power transistors
  • Some wiring wire (for connections)
  • A wiro-board (To build circuit on)
  • A 12V battery of 12V power supply for testing purposes
  • 1 Resisters 1 k


First of all you have to make some changes in transformer. If u are using 500 V transformer then take 18 to 22 gauge copper wire and on the one side of transformer’s core  make five turn and put a point on it, and turn this point, and again turn the wire five times on the same direction. In this way u get three terminals. If u r connect the transformer to 220 V power supply then it gives 1.5 V on both terminals. Now put transformer D1047 on the palm of your hand and turn it such a way that number appears your way. Now you will see three points. The point on your left side is known as (B) Base, middle one is E and the right one is collector(C). (These are the information only for D1047)

connect the E of both sides of transistors with the outer terminal of secondary coil, after that connect the both outer terminals of the third coil with the base of the both heat sinks of transistor. then connect the collectors of both side by wires n then connect the 500 ohm resistor on emitter and resistor on either side. Now connect the middle terminal of primary coil by one to two ft long wire and clip (crocodile) it and attach this terminal always by the positive terminal, and with the negative terminal of battery connect the both collectors of transistor.

After that the central point of the third coil and a wire attach it with emitter to connect using a heavy ampere switch between both terminals of the Inverter primary coil to apply a capacitor which will prevent the current from the sparking. inverter will switch on as soon as starting to work.


With both the terminals of battery connect the positive and negative wires to its terminals positive to positive and negative to negative and then open the switch, slightly vibration starts in the inverter as switch is open. Now you can run it into 1 to 500 watt load.

 500 Watt 12DC to 220 VAC Power Inverter (UPS) Construction in Urdu New

This inverter also can charge the batteries, you just need to( on and  off) the switch.


You will need to switch off for battery charging and connect the primary coil indirectly with 220 V of power supply, after that battery will start charging. To converts it into UPS you needs only one relay. These relays are AC 220 V and 4.4 terminals.

For online help  visit Pak Science and technology Forum

Here is the inverter circuit diagram for battery charging :

Download Inverter Circuit Diagram

Here is the inverter circuit diagram for Inverter operation :

Power Inverter Wattage Chart

inverters Transformer voltages (Input)
Transformer Amps Transformer watt No of Transistors D1047
50 watt inverter 12 V 4 A 50 W 2
100 watt inverter 12 V 10 A 100 W 4 to 6
300 watt inverter 12 V 25 A 300 W
6 to 8
500 watt inverter 12 V 40 A 500 W 8 to 10
1000 watt inverter 24 V 45 A 1000 W 20 to 26
3000 watt inverter 24 V 125 A 3000 W 40 to 50
5000 watt inverter 48 V 105 A 5000 W 60 to 70
Note. table shows that requirement of D1047 transistors for different power inverter wattage

Discussions about Pakistan Science Club's Power Inverters 12 VDC to 220 VAC UPS, you can find problems, troubleshooting and construction help Please visit Power Inverters (UPS)12 VDC to 220" Online Support

power inverter ups

power inverter Urdu New

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  • Comment Link Saturday, 18 February 2012 07:04 posted by ABDUL

    @abdul ghafoor
    you should test with more then 12 volts it will work.the main problem is with transformers. in local (desi) transformer secondary coil can not gives actual volt, its 13v to 15v. you should measure its voltage. or try to use 12+6 VDC battery. secondary coil output should be under 12 volts

  • Comment Link Saturday, 18 February 2012 05:52 posted by Talha

    Sir main ups banana chahta houn our main chahta houn kay ups hamaray bachat kay andar ban jay plz mujhe a simple homemade ups under buchat ki diagram send kar dain.Main ups to banata houn likin wo kit wala hai aour wo 1500rs kay andar banna hai.plz mijhe diagram send kar dain.

  • Comment Link Saturday, 18 February 2012 05:28 posted by abdul ghafoor

    I made inverter according to your's instructions and drawing
    but its not working I used little thicker card under extra coiling instead of thin paper, Does it effect????????

  • Comment Link Monday, 13 February 2012 17:08 posted by vineeth mohan

    i want to make an inverter to my home.i have passed out btech ece in 2011. since there is frequent going of current i wish to make an inverter by myown. i want guidance and help. If you tell how to do it and all, i think i can make it.can u tell all the details prices and all for making the same.

    yours faithfully

  • Comment Link Sunday, 12 February 2012 02:44 posted by ABDUL

    Dear azam kia app mujy yeh bata sakty hain k kis type ka ups banaea hy aur kitny transistor use key hain?

  • Comment Link Saturday, 11 February 2012 19:53 posted by azam

    asslam o alliakum sir;muje ye site bohtb pasand aya.sir ma industrial electric engenier hn.ar ups banane ka boht exprements kr chuka hn.sir ma ne 1000 watts ups banaya ha es ma ma ne d1047 transistror use kie hn magar voltage veriation boht a rahi ha,300 watts se zyada load nahe utha raha ha.computer system chalata ha mgr mazeed lod nahen utha raha ha.battries 132amp*2 ags k lagay hn.dc 24volt circuit banaya ha.plz kindly sir muje koi behtar transister digrame send kren jo mera problm solve h jaye.ho sake esi d1047 transister k sath hi powerfull h jaye.ya kisi ar transister ka digram send kren i shall b very thankfull 2 u thanks

  • Comment Link Wednesday, 08 February 2012 16:30 posted by ABDUL

    @abdul rauf wa salam. bhai aap ny jis jagha 1k resistor use kia hy waha directly 1 sec k ley short kr k check karo. ya phir wire k connection change kr k daikho...

  • Comment Link Wednesday, 08 February 2012 15:26 posted by Abdul rauf

    Aslamu alekum
    Bhai may any inverte banay par wo kam nahe kar raha jis tarah aap nay kaha waysa he banay magar start nahe ho raha 12+12 ke taransforme le us pay 5+5 ke windin ke
    or 5+5 k sat transistor ke b may lagi darmeyan wali or e ko bat - may lagi 12+12 c may lagi 1k res lo or e may phir be kam nahe kar raha ab may keya karu help me plz

  • Comment Link Monday, 06 February 2012 17:22 posted by ABDUL

    @abdul ghafoor yes you can use any 12v battery.

    I faced such kind of problems, I find it problems,the main is with transformers. in local (desi) transformer secondary coil can not gives actual volt, its 13v to 15v. you should measure its voltage. or try to use 12+6 VDC battery. secondary coil output should be under 12 volts

  • Comment Link Monday, 06 February 2012 13:22 posted by hassan

    i try this inverter and its work ,but i have 3 problem

    1=inverter only run a 11watt saver
    3=voltage is only 160 to 180
    4=5-0-5 winding giving a 1.26 volt and 0,5 giving 1.24 volt,(in the diagram 5,0,5 winding giving a 0.7,0.7 volt)

    is that a transformer fault kindly give me a advise

  • Comment Link Monday, 06 February 2012 08:20 posted by abdul ghafoor

    Brother can i use motorcycle battery????

  • Comment Link Saturday, 04 February 2012 18:12 posted by hassan

    well i want to know that agar transformer ki winding anti-clock ho or mai 5,5 ki jo winding hy us ko clock wise kar doun tu is sy kia farq pary ga ??

  • Comment Link Friday, 03 February 2012 10:18 posted by ABDUL

    Dear Abdul Ghafoor
    only two 1047 transistor can use in 6 amp transformer, if you want for more than 10 amps you can use 4 transistors 2, 2 in parallel circuit

  • Comment Link Friday, 03 February 2012 07:24 posted by Abdul Ghafoor

    Dear One How many transistors we need for 6Amp transformer and how to place in circuit

    Abdul Ghafoor

  • Comment Link Thursday, 02 February 2012 16:02 posted by IOANNIS VERVENIOTIS

    I am not an expert in electronics engineering but I am trying to solve a problem. I have a UPS [12V/220 V] in use and I don’t need it. Is there any idea to increase its wattage? Because automatically I will make an inverter 12V/220V for my homemade dual system composed of solar panels, wind generator and 12V batteries.

  • Comment Link Wednesday, 01 February 2012 12:42 posted by Naveed

    sir 500 watt ka ups banany k liye kitne transistor lagany ho gy pls is k bare me muje bata de aur battry ko kesy charge kia jae ga sir pls muje is ka circuit diagram send kr de

  • Comment Link Saturday, 28 January 2012 04:56 posted by ABDUL

    Dear ali aap video main ghor se daikho us transformer se 5, 5 turns extra ke gai hain, aap ko 3 point nikalny hun gy.

  • Comment Link Friday, 27 January 2012 07:40 posted by ali

    *sir , mene transformer lena chaha but wo 12+12/220 ka he lekin 1 side 2 wire hen jo k 220 v k lye , 2sri traf 3 wire hen 12+12 v k lye. ap ne digram me jo transformer dikhaya he os me 1 side 2 aur 2sri side 6 wire hen, ab me kea kron , ye tarnsformer kahan se lon, thank u.

  • Comment Link Friday, 13 January 2012 19:53 posted by Drwebs

    Sir, i'v been using already made UPS(for PC) to power my Tv, DVD, fan and a bulb. I found out that UPS can't charge d battery. Please what do i do??

  • Comment Link Tuesday, 10 January 2012 06:27 posted by SAAD KHAN


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