Everything You Need to Know to Setup Solar Energy Plant in Pakistan!

Energy crisis in Pakistan is neither new nor it is going to end any time soon, we know this for a fact.

While you may agree that energy situation has just bettered (during Ramzan) but we aren’t sure if it is going to remain the same in coming days or not. I personally suppose that situation may remain uncertain for at least few years.

Considering the situation, businesses and home users have long been working to find the best alternate energy solutions to meet their energy requirements. UPS is a solution for some, generators for others but both involve energy input in one way or the other, leaving the whole equation somewhat unviable, especially when 16 out of 24 hours are spent without power.

Also Read: Meet This Solar Energy Solution That Costs Just Rs. 490 Per Month

Solar power is one avenue where Pakistanis have found the ultimate solution. It requires no external input – other than the sun shine – and can operate flawlessly for years and years.

General impression is that solar energy is expensive. It is. But probably not as much as one might think. Also the cost that solar energy can save you in the long-run brings you equally good ROI for well-structured investments made today.

In this post we will try to give you an idea of estimated cost that setting up solar energy system may require. So let’s go straight away to the business.

Planning the Solar Energy Plant

First thing you would want to do is to plan the solar energy plant as per your load requirement. That is, calculating the magnitude of electric load your solar plant will be required to produce.

For the purpose, the first thing you need to do is to make a list of things that you would want to run on Solar energy. Naturally, more load will mean more investment requirement and vice versa.

Power Required for Home Appliances:

To help you with calculating the energy load, we are listing below few things with the respective energy load they consume to operate:

  • Energy Saver: 10/20/40 Watts
  • Fan: 90-110 Watts
    • Some Older fans consumer 120 Watts
  • Tube Lights:
    • Full tube: 40 Watts
    • Half tube: 20 Watts
  • LED Bulbs: 7 Watts
  • LED TV (Almost all sizes): 30 to 40 Watts
  • LCD TV (Almost all sizes): 90-100 Watts
  • Old TVs: 300-400 Watts
  • Iron: 1000 Watts
  • Refrigerator: They consume 250 Watts to 700 Watts depending on make and type
  • Deep Freezers: 600 Watts
  • Water Motor
    • half horse power: 325 Watts
    • One Horse Power: 750 Watts
  • Laptop: 15-20 Watts
  • Router/Modems/Chargers (Combined): 10-15 Watts
  • ACs:
    • During first half an hour or so when compressor runs at full throttle: 2800-3000 Watts
    • Rest of the time when temperature settles down: 1500 Watts
  • Invertor ACs:
    • During first half an hour or so when compressor runs at full throttle: 1800 Watts
    • Rest of the time when temperature settles down: 500-600 Watts

Items listed above and their corresponding energy requirements may vary for different situations, depending on conditions, make and their age. But we can take above mentioned values to plan our solar energy plant.

Just to mention, Invertor type ACs are comparatively a new thing, they cost little extra. For example a 1.5 ton Invertor AC from Haier will cost you around Rs. 60,000 as compared to Rs. 40,000 for usual AC from the same company. But they save energy and are usually recommended when your energy source is powered by a solar system.

Things you need for Solar Energy Plant

Below are three things that you will need during the entire setup of

  • Solar Panels
  • Batteries
  • Invertors

Solar panels are those black plates installed on roof tops. These panels are responsible for converting the sun-shine into electric energy. These solar panels come on per watts basis, that is, a solar panel can be of 100 watts. Putting two such panels will get you 200 watts and so on.

Batteries are required to store electricity for night-time load shedding. During day time your system will power up the appliances, but you have to store energy to make sure that appliances are powered smoothly during night time load-shedding when solar-plant isn’t producing any electricity.

Inverters are used to convert electricity into a form that is usable by our appliances.

Cost of a Solar Plant

Above mentioned three items will cost according to the electricity requirements we may have depending on our needs.

As a reference, let’s assume following situation:

We need to run following items on solar energy:

  • 2 Fans
  • 2 Energy Savers
  • 1 laptop
  • and few chargers

Here’s the corresponding load we will need:

  • 2 Fans: 110 x 2 = 220 Watts
  • 2 Energy Savers: 20 x 2 = 40 Watts
  • 1 laptop = 20 Watts
  • and few charges = 10 Watts
  • Total: 270 Watts

Ideally speaking we will require 270 Watts of energy to be produced by solar system that we are going to deploy in our example case.

Practically, we will deploy 540 Watts panels, because when on Solar energy – during day time – we need to power our appliances with 270 watts, plus we need to charge our batteries too for usage during load-shedding in the night.

Here is the corresponding cost for 540 Watts of Panels:

  • Solar Panel: Rs. 100 per watt = Rs. 100 x 540 = Rs. 54,000
  • Invertor – we will need 1KW invertor = Rs. 26,000
  • Batteries: 2 x 200 Amp batteries: Rs. 13,000 x 2 = Rs. 26,000
  • Total Cose: Rs. 54,000 + Rs. 26,000 + Rs. 26,000 = Rs. 106,000

Note:

  • You can use one battery instead of 2, but that will store lesser amount of electricity – which will give shorter back-up time during nights. Same as we deal with UPS batteries — more the battery power will mean more back-up time.
  • With two batteries and the load requirements in our example case the back-up time will be around 4-6 hours during night.
  • Please note that during day time you won’t require batteries, so technically speaking – you can run this solar plant for assumed load for whole day (as far as the sun is up).
  • Since the load is 540 Watts, 1KW inverter will do the job. If load was 2400 Watts then you would have to use 3KW inverter.
  • Pricers of bigger inverters are given below.

So you need to spend Rs. 106,000 for the solar plant to power up 2 fans, 2 energy savers, one laptop and few chargers for seamless up-time.

Here are Few things to note:

  • Price of solar plant may differ. Above mentioned price of Rs. 100 per watt solar plant is market average rate for premium quality Chinese plants
  • You can get European (German) solar panels for Rs. 150 per watt, but that’s just additional cost as Chinese panels work fine.
  • If your load exceeds 500 watts then you will have to use high-voltage inverters, that is 2 KW, 3kW or above. Here are estimated prices for bigger inverters:
    • 1 KW Inverter: Rs. 26,000
    • 2 KW Inverter: Rs. 35,000
    • 3 KW Inverter: Rs. 45,000
    • 4 KW Inverter: Rs. 60,000
    • 5 KW Inverter: Rs. 80,000
    • 10 KW Inverter: Rs. 200,000
    • P.S. Prices of inverters also vary, depending on the quality and made. Prices mentioned here are for good quality Chinese inverters
  • Number of batteries will also depend on the load you may require to store. Here’s the desi formula for calculating back-up timing of a battery:
    • Amperes of battery x number of hours with sun-shine / load = Back-up time in hours
    • Example: (200Amp + 200Amp) x 10 hours / 540 Watts =  around 7 Hours

Amount of batteries required in your solar plant can be determined by using or re-arranging above desi formula:

  • Back up time  = Amperes of Battery x Number of Hours with Sun-shine / Load
  • Amperes of Battery = Back up time required / Number of hours with Sun Shine x Load

Further things to note:

  • Life of solar panels is around 25 years, however, with time the efficiency or electricity-production ability of panels lessens
  • Life time of dry-battery is around 5-7 years
  • Life time of liquid-battery is around 2 years
  • Solar panels work fine below 45 degree Celsius
  • Solar panels work well even in hilly areas, such as Murree

Disclaimer: Anything mentioned above is produced after market survey with purpose to give you an idea about solar plants and its pricings. These rates, however, may vary to any extent. Special thanks to Waqas Khaleeq for helping us in preparing this post.

If there’s anything un-answered or not clear, please go ahead and ask in comments below and I will do my best to address them.

Tech reporter with over 10 years of experience, founder of ProPakistani.PK


    • You could calculate it yourself… here’s how we do it.

      Power requirement:

      -2 Fans = 110 x 2 = 220 watts
      -3 savers = 30 x 3 = 60
      -1 Fridge = 700 watts
      -2 Chargers = 20 watts

      Total = 1,000 watts

      So you need a solar panel that can power 1,000 watts. As a rule we will multiply this with 2, so 2,000 watts panel plates are required.

      Solar Panels = Rs. 100 x 2,000 watts = Rs. 200,000
      Inverter (since it 2K watts so a 2KV inverter will do) = 2KV = 35,000
      Batteries (For four hours of back-up time during night) = 2,000 x 10 / 10 = 800 Amp = Four batteries of 200Amp will do = Rs. 14,000 x 4 = 56,000

      Total Cose: 200,000 + 35,000 + 56,000 = Rs. 291,000

      Hope it helped.

      • if you can make a small software for load calculations, we just enter the no of appliances and it calculates the load :P

        • Here’s the formula: Amperes of Battery = Back up time required / Number of hours with Sun Shine * Load

          If you get 1200 Amperes then 6 batteries of 200Apm will do.

          • when calculating backup time you must also consider that typical led-acid batteries should not be discharged below 50% to keep those working for longer period of time.
            whereas you can discharge a deep-cycle battery upto 20% though they cost much more than led-acid one

            • Dear brother thanks a lot for this survey. i would like to please extend your description to address the following questions. Q1. What will be the idea to use DC appliances? Does it mean that in that case we will get rid of inverters? Q2. As far as my experience is concerned i think the conventional lead acid batteries have poor performance owing to their smaller life time. what would you suggest about using Li Ion Batteries? In that case what kind of changes we will need to bring in the above plane you discussed? Please suggest the charge control mechanism for using Li ion Batteries since these require more sophisticated charge controller that i cant understand fully inspite of extensive googling. Q3. Sir kindly can you help me find some reliable suppliers of Li ion batteries in Pakistan to get these from. finally with many many thanks i am waiting impatiently for your kind response. Kindly if possible send me an sms on the cell number provided when you reply to my post
              Muhib Ullah 03339423353 i need help

      • Aamir you consider liquid batteries, thats mean you need 56000 after every 2 years. Lets suppose this panel runs for 25 years. it will cost you 25/2(years) x 56000= 700000 —-> Minimum running cost will be 500/month (150000 for 25 years)—-> thats mean total cost for this unit for 25 years will be round about 12,00,000.

        Per month cost 1200000/25= 48000/year = 4000/month

        Lets say it will cost you 900000/25= 36000/year = 3600/month
        If you add depreciation cost of total unit, you can add 500 more :).

        If you use wapda energy it will cost you maximum 3000/month or might be little bit more. So all these (ups, solr etc) methods are not feasible at any cost until !

        Government reduce tax on raw material or promote local production.

        • for a thousand watts usage for around 12-15 hours per day means 450 KWH energy consumption per month. I wonder how u get billed 3000 for 450 units of electricity ? it may cost above 10000 in Pakistan.

        • dear it is best solution for load shedding. why you are comparing 18 hours loadshedding wapda power supply to home made solar system…

      • but this is for off the grid living right – i,e, 100% independence from k electric (for karachi i.e.)

      • Hello, Would you please suggest me that for example for 200 AMP liquid battery how much plates enough to charge it like 3 plates of 150 watt can be charge the battery full?

        • 1000 watts is for your appliances, and the remaining for charging the battery during day time.
          it will also help you if sometimes your usage appliances exceeds 1000 watts

      • Dear brother thanks a lot for this survey. i would like to please extend your description to address the following questions. Q1. What will be the idea to use DC appliances? Does it mean that in that case we will get rid of inverters? Q2. As far as my experience is concerned i think the conventional lead acid batteries have poor performance owing to their smaller life time. what would you suggest about using Li Ion Batteries? In that case what kind of changes we will need to bring in the above plane you discussed? Please suggest the charge control mechanism for using Li ion Batteries since these require more sophisticated charge controller that i cant understand fully inspite of extensive googling. Q3. Sir kindly can you help me find some reliable suppliers of Li ion batteries in Pakistan to get these from. finally with many many thanks i am waiting impatiently for your kind response. Kindly if possible send me an sms on the cell number provided when you reply to my post
        Muhib Ullah 03339423353

        • 1000 watts is for your appliances, and the remaining for charging the battery during day time.
          it will also help you if sometimes your usage appliances exceeds 1000 watts

  • Banks or Government should provide interest free loan to set up solar plants instead of wasting money on Youth Loan scheme

    • thank you for the Mashwara:
      think in a broad way. Youth Loan Scheme is individual empowerment, if you provide only the solar panel the individual will use it for his ownself and nothing will be done which he we do after investing and hiring more people under him which will enable all the individuals to buy any thing for their families it could be the solar panels as well.
      so think out of box.

      this is Macro Economics.

      • Similarly , this shitty youth scheme was for PEELI TAXIS , where are those taxis on roads ? I have came back from middle east on vacation and yet to see a single taxi which is actually working as a TAXI.. Every one is either using it for their personal use or they have painted it.

        You are right that this is Macro Economics but it is not applied in Pakistan. Both the government and nation is misusing it.

      • bhai in what world you live in? read your own words.
        countries empower by putting hi tech factories , by looking at the big picture not like Sharif brothers which give UN laptops for free . its not even their scheme. taxi scheme cost billions of losses for the benefit of individuals.
        energy is the single need for any economy that ca take you to the future .
        there is a great brain drain in pak which is evident in your post.

      • Paa ji . apni website pe spelling mistakes to theek kar lo. aur jo free template uthaya hai ap ne template monsters se , us ma kuch lines abhi bhi kisi aur language ma likhi hoi hia , un ko theek kar lo. aisi website dekh k kon order dega ap ko ???

      • Dear brother thanks a lot for this survey. i would like to please extend your description to address the following questions. Q1. What will be the idea to use DC appliances? Does it mean that in that case we will get rid of inverters? Q2. As far as my experience is concerned i think the conventional lead acid batteries have poor performance owing to their smaller life time. what would you suggest about using Li Ion Batteries? In that case what kind of changes we will need to bring in the above plane you discussed? Please suggest the charge control mechanism for using Li ion Batteries since these require more sophisticated charge controller that i cant understand fully inspite of extensive googling. Q3. Sir kindly can you help me find some reliable suppliers of Li ion batteries in Pakistan to get these from. finally with many many thanks i am waiting impatiently for your kind response. Kindly if possible send me an sms on the cell number provided when you reply to my post
        Muhib Ullah 03339423353 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

  • Thanks for the guide, I wanted to know how is the performance of a solar plant affected when there are clouds or rain?

    • They work fine. Consider that solar plants are installed in northern Europe too. For reference, assume solar calculators and the way they can work.

      • A.o.A bro meine 1ton ac use krna hai to os k lye muje btain kitny soler palit or kitne battery hony chahyen ….

    • Yes, output is reduced, but not that much. It stil depends on how much cloud cover is there.

  • Thanks for a useful write-up. More informative and practically useful information about current technology will be welcomed.

  • i am very happy with this article mostly people dont know about solar panels and its load managment

  • @aamir7:disqus
    Truly Speaking,This one is An Excellent Piece Of Helping Article

      • Plz ye batain ke agar 1 ghar men me 5 fan/2 LCDs/1 AC / 6 savers/ Water Pump/Washing machine /REfrigerator/rion wagera istamal karna chahta hon or hamar aload appliances ke lehaz say 4000 watt banta hai lekan ham sab chezen aik he wakt men istamal na karen to yani jis wakt washing machine istamal ho rahi ho us wakt ham iron or water pump istamal na karen to phir kam load par beh kam chal sakta hai ya nahim

          • Hi Zubair, can you please tell me how much will it cost to set a solar power system in multan to run one complete house with the followings,

            ceiling fan 4
            1.5 ton air con 1
            350 liter fridge 1
            40 watt energy savers 8

            how much is the average life of dry batteries ?
            what is the average cost of dry batteries ?
            how much for the lead acid batteries ?

            is there any company in pakistan providing the systems with 25 year real warranty ? if the warranties are available ,which of the components are covered under warranty.
            can you please reply on my e mail [email protected]
            as this is the first time I am on this site

  • This looks quite expensive at almost 2 USD per Watt or 2000 PKR per Watt. If I compare to a normal 2 KVA UPS which is around 50K with batteries, how is the business case for solar justified?

    • You aren’t getting the real idea: this solar power energy will get you (almost) free electricity for 25 years.

      • The batteries have to replaced every few years and we should also assume some O&M costs after 5 or 7 years. Practically it becomes difficult to break even although convenience is there.

        Do share the cost break even working if possible so I can see where I am going wrong.

        • The energy in the UPS costs something around Rs. 20/kWh (including the charging/discharging/rectification/inversion losses, but excluding battery replacement costs).

          So if you do the maths properly, solar will turn out to be a very worthwhile investment for the majority of Pakistani households.

    • First of all Solar System in Pakistan is for comfort and peace of mind not as business case , Secondly UPS can never be compared with solar system , since UPS waste lots of energy while charging and discharging the batteries . There is no running cost of Solar system . In most cases Solar gives its ROI within 2 to 3 years .

  • Ye sab kuch bohat aala hai but murree jese thanday shehar ke liye, Q k punjab mei to temperature 45+ rehta hai aur 1 ghar ka load near about 1500 watts hai bina ac ke , batteries cost boht ziada pare gi,

  • the average at my place during day is 1200 but during for an hour it touches 2200 due to iron… what should i do ?

  • aoa,

    i have alread ups 750 watt with 200 ampere battery… i need to run two fans, 4 evergy saver plus charger

      • Asslam o Alaikum Mr.Khaleeq;

        I have installed 1040 watts system at my home with 200 amps battery. Running all appliances (like fans, Desert colors, laptop and LED with few energy savers). Mostly in day time my load remain 300 watts max. I just want to ask you if in day time i can run my refrigerator on it as i have Axpert KS 3 kva inverter and my refrigerator took about 8 amps starting load (Normaly it takes 200 watts max) or should i replace my inverter with 3 kva xpi inverter which is transformer based. I am hesitating to install transformer based inverter as i read online its consume more electricity and generate less (means to say it losses electricity during operation as compared to transformer less) Awaiting your comments

    • yes what is the price of charger controller? and also can we use same controller to all like 1000 watt or 2000 watt solution or it may differ. advise pls thanks

  • I will suggest to use DC fans and lights/leds. to maximum utilize the energy and this will also require less solar panels. No need of AC/DC converter – everything is DC. Less cost. What are your thoughts?

    • DC solution is good for small houses but not good for large house , because there is a huge ampares loss with length of DC wires and cost of replacing AC to DC appliances till be much more higher than cost of an inverter . plus DC solution is not too much reliable

      • waqas Bhai, kya solar system sirf day time k liye use kia jaa sakta hai, without battries, or uski cost or efficiency kya hoo gi. 3 fans, 3 energy saver, few chargers, laptop, modem, mobile…

        • Hi, could you please provide some information and total cost for solar water pump 1 horsepower or less including the panels required, as stand alone system, and where to get it from in rawalpindi Islamabad area. Thank you in advance.

    • I want to kknow answeres to following 3 queries.
      1. Can I use a battery less solar solution for my home ?
      2. Can I use solar panels in front of my existing UPS ( in day time only) with touching to existing wiring and any thing else. In evening UPS will use WAPDA as it was using before solar installation.
      Thanks

  • Does solar panel work well in Karachi? Asking b/c you mentioned solar panels work in 45 Degree and there is hardly 45 degree in KHI

      • remove this reference about 45C.

        that 45C is for cell temperature, not your local weather. Most people are miss-interpreting it.

  • for cost calculation i will suggest aamir if you make an excel sheet (template) which will help users by selecting their requirement.

  • I have installed 4 solar panels each of 150W and the DC output of these solar panels is connected to the same battery that is charged by UPS. So almost all the day time my UPS battery is full (When it is charged by both solar panel supplied current and traditional electricity). I operate 2 ceiling fans and a desktop computer (with LCD) on battery and current level in battery floats around 80% to 85% when it is solely being charged by solar panels. I believe its a good option to install solar panels for atleast meeting core energy needs of homes.

  • So, this will only works in Morning time? 4 hours back up for the night will be too short.

    • Install a larger array along with matching battery bank. It depends how many days/ hours you need of your solar system.

  • @Amir7 bhai I have question for you are you sure battery price of 200 ampere is 13000??

    • Yes that’s the approximate price of wet-cell lead-acid battery which lasts around 2-3 years (provided you take good care of it and use a good-quality charge controller). For sealed, maintenance-free battery, the cost is around twice that, but may last up to 7 yrs, as mentioned in post.

  • You forget to mention the Solar Charge Controller, which is the key component in any Solar Power Plant.

  • Amir bhai Kindly include renewable energy field propakistani.com’s scope as well. Thanks.

  • Solar panel are available in Pakistan @ Rs. 50 to 70 per watt not Rs.100. If you have already UPS installed then no need of inverter and batteries.

    • Yes we heard about low priced panels, but watch out they might not perform well. Also their age isn’t usual 25 years long.

  • Hey Amir, this is a great post, I have to congratulate you and Waqas on this. Very informative, to the point, very useful. You have no idea how pleased I am that you published this kind of information. I don’t intend on setting up solar myself, but this is the kind of information that needs to be out there. I have a few ideas for you.

    1. How to actually set this up: Basic connection setup guide.

    2. Is dust an issue? How about cleaning solar panels?

    3. An infographic with the key information (for passing around facebook).

    4. A translation of the article AND facebook into Urdu, for more to read.

    5. Someone below mentioned bank loans. Maybe include information on that.

    This kind of information is very valuable, and could also bring in some readers to propakistani if it gets passed around facebook enough.

  • Hey… a few corrections:

    1. For 270 watts, you will need at least 400 watts of panel.
    2. You need to be careful about Voltage of panels, it ranges from 12 Volts to 150 volts. You need the right panel also.

    Whilst mono-crystalline and polycrystalline panels are 12, 24 or 36 volt, thin film are of higher volts (100 ~ 150 volts) and are commonly used to run tube wells through VFDs.

    So for home solution, you need to match up your panels with inverter. if inverter is 48volt input, then you would need 4 panels of 100 watts each with 12 volt to match up total power and voltage to work the system properly.

    There are alot more other complex issues in solar designing, but overall, your post is great (Y).

  • btw I couldn’t read the whole article but I think the writer did not mention that you cannot provide electricity to others, even your neighbor because for this we have wapda and one cannot provide electricity to anyone except wapda. So we can use this energy for our own use only.
    For this whole article see the picture below.
    well done good work Q Mobile/Motorcycle or laptop apka hua

  • Yaar, Khanewal ki garmi main zaleel ho geya hun, koi mujy just ek pankha ka batao, 24 hours tak chalta rahy bus. aur kitny ka ban jaye ga?

  • Thanks Aamir, just to add couple of things because i recently installed my Plant for my domestic purposes… Cost of solar panels (good Chinese) is quite reduced now. GH Solar costs Rs. 83 per watt. However; if the market is looked in bit detail, good quality panels can be found as low as Rs. 70 per watt.

    2nd, Hybrid inverter cost is also reduced. Cherry’s hybrid inverter of 5KVA now available in market in about 50K. However; the good quality of Inverex inverter in market is now sold around at 70K.

    A formula I’d mention here for many calculations: Watt = Volt x Amperes

    Another important element: Solar panel of 18V actually provides 12V at the inverter. Similarly, 36V panel provides 24 volts and 72V provides 48V at the inverter. The solar companies while mentioning the wattage of their panels calculates on the rated voltage i.e. if a solar panel of 18V gives maximum of 6 amperes, they’ll rate it as the panel of 18 x 6 = 108 watt. While actually that panel gives 12 x 6 = 72watts only and that too while at peak. To cope with normal sun shine, we need to have a 20% freeboard. Thus this panel which is rated by the seller as 108 watt should be considered as 60 watts.

    Just a lil further detail, if we need a system of 270 watts, we’d need to calculate it as below on the grounds of 24v (two batteries system):

    = Load x 1.2 (freeboard margin) x 1.33 (discounted rated power)
    = 270 x 1.2 x 1.33
    Lets simplify it
    = 270 x 1.6 = 432 watt panel.
    Now this is the power without any storage capability. To add up for the charging of the batteries, we need at least 1.5 times more of panel. Now this load shall become = 432 x 1.5 = 648 watt panel.
    As a simple solution, we simply need to multiply the load with 2.4 (lets call it coefficient).
    eg 270 x 2.4 = 648 watt panel shall provide the 270 watt load plus battery charging as a backup. Whatever is the load, to cope with the change in sunlight intensity, solar companies rated power factor, charging etc… simply multiply it with 2.4 to determine the panel capacity.

    • Calculations start from load, not from Panels required.
      0.77 is taken as a factor for gridtied solar systems.

      0.52 is for Off-grid/ UPS systems

    • I’ve been doing research on internet for a couple of days, Asking from all experts.
      If there is 1000 watts UPS (Same case with solar inverters, not talking about hybrid inverters or priority based), and let’s say 450 watts panels, a charge controller.

      Assume the scenario:
      1. If UPS is charging the battery and at the same time solar panels also, would the battery not get damage, because the battery is 12v, the charge controller already giving 12 v, while the UPS also charging at the same time.

      for a full sunshine, 450 watts panels, how much it will giving back up time for AC electricity, suppose load is 200 watts.

      Also,

      Please recommend me with specs, a good solution for good loadshedding (Battery type, inverter type), load is 300 watts.
      @aamir7:disqus @aslam @ahmad shahzad.

  • Just to add one more thing… there are two types of panels i.e. Monocrystalline (Mono) and Polycrystalline (Poly). Poly panels are designed for the areas with comparative less sunlight… like in Pakistan can be used in Swat, Gilgit etc. While the Mono panels are designed for the areas with plenty of sunshine.

    They laymen of solar installers install Poly in the areas with plenty of sunshine which reluctantly gives more output of amperage but its life is reduced to about 17 years only. Just food for thought.

  • Question: Which laptop consumes 20 watts ? as every laptop charger I ever had was at least 60 or 80 watts.

  • 2 Savers, 2 Fans, 1 Laptop? With 106,000? And how much reliable is solar energy? I mean i’m no expert at this. But what happens when weather is not that hot? or how long does the energy lasts you? Considering it’s solar, It must be weak. I’m better off with my 70k UPS system. 50k battery and 20k inverter. It runs 3 Desktop computers, 2 fans, 3 savers, All at once for 5 hours! Lasts 2 days if we don’t use computers. Runs tv and everything else perfect. so yeah..

    • Solar Panel performs better in in moderate weather. why you have both a 70K UPS and 20K inverter ?? A

      As for Solar people live off-grid on it 24 hours a day can your 140K system ill-designed system can do that ?

      • I’m sorry but these karigars always confuse me with stuff. I meant 50k battery and 20k UPS. they call it “inverter” locally, yet again i’m no expert at this. But you need a inverter and a battery both to call it a “UPS” system no? Well, I’ve no plans for going off-grid. I don’t have big bangla and garden with it, to set up these gigantic solar panles! I live in a 4 room flat. Where do i set up these solars? Also, my UPS is pretty much up to my needs. Anyone like me should go for UPS i think.

  • Is there any reliable compnay in lahore who is providing services like visiting home calculating load, identifying the aera and so on !!!!!

  • I think we are missing one very important component here and that is the charge controller which gets installed between solar panels and batteries. Its controls the voltage coming out from solar panels and can also stop the current from following to the batteries in case the batteries are full with current.

    • you are right but i all solar system inverters come with built-in charge controller. specially when it cost Rs. 26,000 for 1 KW…
      otherwise you can get inverter for as low as 6-7K

      • You need a pure sine inverter for pure AC experience. 6-7k inverter is not pure sine wave.

      • Inverter: A device for changing DC Voltage into AC Voltage. See also: http://www.solar-ele….r_electric.htm
        Inverter/charger: As defined for Inverter, but with utility or generator input for a built-in supplemental battery charger.

        Not all inverter come with a builtin charger. Indeed most american inverter don’t have a builtin MPPT charger like chinese do.

  • Dear All

    I myself own a company and have been dooing a power business since long i also started off the business thinking it is the most feasible thing on earth. After a few years of work and some calculations i realized that the payback period for this setup is 18 years. The inverter they are talking about is chinese go for a good one and you will find it for 3-4 lac. The panels also being used are of low quality. The problems with panels is that even if a single edge is damaged the whole panel would stop working so the whole 1lac goes down the drain. I have made many feasibilities for a number of companies they all come out to a negetive ROI dont understand how his calculation comes out to positive maybe he is not taking in 3 years replacement cost of the batteries. The battries cost also seems to be odd but lets stick with it. My recommendation to those companies is use the diesal generator that is cheaper to you. So until and unless you are environment savy person and wish to see Pakistan green dont go for this this is total loss of money 18 years payback is like too long. The technoogy is developing but it isn’t developed yet. We people just make dicisions looking at the top like the pani ke gari of agha waqar which came in US in 1800s so i recomment my brothers not to use it in any case eventhough this will result in my loss but this is the truth.

    • Dear Dunamis, ur post is good but a lil bit lack in de tendency of realistic approach. As detailed above, I myself installed a solar plant for my domestic purposes. Mono panel of 200 watts cost u around 14k not a lac. 5kva hybrid Inverter costs u around 70k. Damage to panel is of course a loss but y to let it happen? My installed system is of around 6kva, 4 dry batteries, hybrid intelligent Inverter. And I’m off grid every morning till evening. Load I use is water pump, 2 refrigerator, 2hp motor, washing machine and spinner, iron, and one air-conditioner. Fans and bulbs I do not count as load :). My system is working excellent since last 1.5 years with no power outage even for a second. Total cost was around 700k which includes 24 panels, Inverter, 4 batteries, DC cables, panel frames and stand. The power I use till now is around 600kwh per month. The bill which wahda shall charge u for this much load is more den 10k per month and return shall be in about 6 years… Plus the luxury and comfort is an additional advantage. If anyone want some information from my experience can contact me [email protected]
      U can write ur viber or whatsapp number I’ll share pics of my system also.

      • if you can post here the pictures of your system…
        at which angel you put the panels
        and at which degree you can get best results or power from solar panels

      • I think u are talking right, rest of they just trying
        to be number scoring ?……………….., rest of drink that?????

  • Really nice article!! Anybody actually using this setup and which company, please share your experience.


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