The Alternative Energy Thread - Generators, Solar, UPS, Wind

[haseeb114]

I have installed a 3000 watts Solar system at my home. Its totally a DIY as I am electrical engineer. I am using Sharp Thin film japan made PV, Voltronics Infini 3KW Hybrid Inverter with grid tie feature and normal acid batteries 200A Exide. Nizam Solar is good but their response over queries and technical support is not up to the mark. Its better to do DIY and I will help you on each and every step for free Cost for Solar panels (170 rs per watt) 2420 Watts = 411,400 Rs..... Inverter 135,000 for 3KW and 4 Acid batteries 300A are for 60,000 (15,000 Each) or Sealed for 54,000 each. Other expense for wires, Solar panel and battery bank stand etc. One more thing which need to get notice that in extreme temperature like 40 degree Celsius Chinese panels loose their efficiency. Thin film is new technology and Sharp is offering 25 years warranty for 80% efficiency. Also thin film can work -40 degree Celsius to +90. And second option which is highly recommended is use as Hybrid solution. Just install a 2000 Watts system with 200A batteries and 2KW inverter. When ever you have lack of power from Solar or batteries you inverter will manage power from Grid.

Your system looks stable and well organised.

Hybrid is what im looking for but in less watts(due to budget), i have calculated max load excluding heavy stuff like fridges, washing machine, iron, microwave oven and AC's.. its around 1432 watts, but not all will be ON at once..I know PLC programming, So the Hybrid system that i designed on paper is by using relays (PLC internal relays logic). But don't know what will happen practically...Please PM me your number, so i can get detailed guidance ... Just graduated in electronics eng. and this my first home project... My investor(Dad) prohibited any hired worker and hes not in Pakistan to guide me(BTW he is also electronics engineer) .Means DIY is strictly applied. I will PM u my number.

[whiteangel]

I have installed a 3000 watts Solar system at my home. Its totally a DIY as I am electrical engineer. I am using Sharp Thin film japan made PV, Voltronics Infini 3KW Hybrid Inverter with grid tie feature and normal acid batteries 200A Exide. Nizam Solar is good but their response over queries and technical support is not up to the mark. Its better to do DIY and I will help you on each and every step for free Cost for Solar panels (170 rs per watt) 2420 Watts = 411,400 Rs..... Inverter 135,000 for 3KW and 4 Acid batteries 300A are for 60,000 (15,000 Each) or Sealed for 54,000 each. Other expense for wires, Solar panel and battery bank stand etc. One more thing which need to get notice that in extreme temperature like 40 degree Celsius Chinese panels loose their efficiency. Thin film is new technology and Sharp is offering 25 years warranty for 80% efficiency. Also thin film can work -40 degree Celsius to +90. And second option which is highly recommended is use as Hybrid solution. Just install a 2000 Watts system with 200A batteries and 2KW inverter. When ever you have lack of power from Solar or batteries you inverter will manage power from Grid.

It's good to see someone doing a well researched solar setup and your engineering background certainly helped you get the best out of it.

Most people want to get it done cheap and they have little knowledge about the types of solar panels available and their efficiency, inverters, charge controllers etc. These types of people become easy targets for people who are in the solar business to make a quick buck. Hall road is full of such solar vendors, who only want to sell you the cheapest solar system and the emphasis is on cost per watt without considering efficiency of the setup and durability of the components.

[alam786]

Do not go for the Ferrari as your first car. A single failed component could disrupt the whole charge controller and system. And why you are going for expensive charge controllers.These are all market tactics.Invest in deep cycle batteries, good quality panels and use modified sine wave inverters available in market Do not complicate your first set up. As an electronics engineer developing a simple digital type charge controller is not a difficult job at all....but i doubt you need one as your first set up just match the voltages and go for lower voltages and power reqs initially..buy a few panels and test first atleast this is what i would recommend.

[tausifs]

I have installed a 3000 watts Solar system at my home. Its totally a DIY as I am electrical engineer. I am using Sharp Thin film japan made PV, Voltronics Infini 3KW Hybrid Inverter with grid tie feature and normal acid batteries 200A Exide. Nizam Solar is good but their response over queries and technical support is not up to the mark. Its better to do DIY and I will help you on each and every step for free Cost for Solar panels (170 rs per watt) 2420 Watts = 411,400 Rs..... Inverter 135,000 for 3KW and 4 Acid batteries 300A are for 60,000 (15,000 Each) or Sealed for 54,000 each. Other expense for wires, Solar panel and battery bank stand etc. One more thing which need to get notice that in extreme temperature like 40 degree Celsius Chinese panels loose their efficiency. Thin film is new technology and Sharp is offering 25 years warranty for 80% efficiency. Also thin film can work -40 degree Celsius to +90. And second option which is highly recommended is use as Hybrid solution. Just install a 2000 Watts system with 200A batteries and 2KW inverter. When ever you have lack of power from Solar or batteries you inverter will manage power from Grid.

Very nice and well calculated setup rizwan bahi.Can you please guide me on the following,
1. What is the max rated dc output of the panels and what is the variation of output through out the day?
2. Does this charge controller regulate the charging voltage on the basis of current produced by panel or on the basis of battery charge depletion status?
3. Have you ever checked the panel output on a full moon night.......if yes........how much?
4. Have you tried to operate/check the panel with a few 1 to 2 watt LEDs in night? Does it max out with the power consumed by LEDs?
5. Where did you get these Sharp panels from? Are they new or used smuggled ones?
6. Did you demand efficiency check of the panel before purchasing? You are very right about the drop of efficiency of chineese panels with not only increased temp but also with time and climatic conditions.
7. How much would the hybrid system cost approx? I checked an american brand hybrid grid invertor 3kw but price was above 2,50,000. But considering its quality and features/functions, price is very reasonable.
8. Where can I find a calibrated photovoltic reference cell for efficiency checking of the panel at different times in day, night, summer, winters etc.
9. Dont you think / prefer dry deep cycle battries over these acid ones?

I am working on a solar project just for fun and mainly to kill the keera within me
People sitting in the market selling these systems dont know $h1t about these things.......they are just ripp offs.
I bieleve in proper systems with quality setup and material.

PS. I love your attention to quality stuff and interest in DIY rather than relying on those self taught electric street engineers :-).It would be great if you can post some detail pics along with detailed mechanism/functioning of the system. It will not only help me but also all the PW members. Consider knowldege sharing as sadqa :-). Contribute to this forum....not forcing you......just a request if you can manage easily.

Regards.

[haseeb114]

It's good to see someone doing a well researched solar setup and your engineering background certainly helped you get the best out of it.

Most people want to get it done cheap and they have little knowledge about the types of solar panels available and their efficiency, inverters, charge controllers etc. These types of people become easy targets for people who are in the solar business to make a quick buck. Hall road is full of such solar vendors, who only want to sell you the cheapest solar system and the emphasis is on cost per watt without considering efficiency of the setup and durability of the components.

That's exactly whats going on in market. Buyers/sellers have no idea what they are buying/selling... But people are buying/selling panels like chips.. most people i saw were buying panels for small shop and for tube wells .. they don't know what watt volt or current is. Controllers were garbage and were sold at 3500 rs ...

I was looking something close to a good stuff. But found nothing. now decided to test efficiency of panels before getting them. Next time i will go there at 1PM with 150watt inverter , 100watt bulb and clamp on AC meter, to check 100watt panels

[akifjanjua]

I recommend Solar as a DIY project.. I am succesfully running one off-grid system at my village... At home, solar panels charge my HomeAge UPS batteries.

To start with.. just hook up a charge controller to your existing UPS batteries and put up some panels.. you will see longer UPS backup time in daytime and lesser energy bill

btw... i have a few 30Amp 12/24v MPPT Charge controllers.. PM me if anyone needs one

[haseeb114]

Do not go for the Ferrari as your first car. A single failed component could disrupt the whole charge controller and system. And why you are going for expensive charge controllers.These are all market tactics.Invest in deep cycle batteries, good quality panels and use modified sine wave inverters available in market Do not complicate your first set up. As an electronics engineer developing a simple digital type charge controller is not a difficult job at all....but i doubt you need one as your first set up just match the voltages and go for lower voltages and power reqs initially..buy a few panels and test first atleast this is what i would recommend.

That's what i have concluded. I'm setting up 100 watt panel first, with car 150watt inverter. Will test it before going above 1kW.

[haseeb114]

Very nice and well calculated setup rizwan bahi.Can you please guide me on the following,
1. What is the max rated dc output of the panels and what is the variation of output through out the day?
2. Does this charge controller regulate the charging voltage on the basis of current produced by panel or on the basis of battery charge depletion status?
3. Have you ever checked the panel output on a full moon night.......if yes........how much?
4. Have you tried to operate/check the panel with a few 1 to 2 watt LEDs in night? Does it max out with the power consumed by LEDs?
5. Where did you get these Sharp panels from? Are they new or used smuggled ones?
6. Did you demand efficiency check of the panel before purchasing? You are very right about the drop of efficiency of chineese panels with not only increased temp but also with time and climatic conditions.
7. How much would the hybrid system cost approx? I checked an american brand hybrid grid invertor 3kw but price was above 2,50,000. But considering its quality and features/functions, price is very reasonable.
8. Where can I find a calibrated photovoltic reference cell for efficiency checking of the panel at different times in day, night, summer, winters etc.
9. Dont you think / prefer dry deep cycle battries over these acid ones?

I am working on a solar project just for fun and mainly to kill the keera within me
People sitting in the market selling these systems dont know $h1t about these things.......they are just ripp offs.
I bieleve in proper systems with quality setup and material.

PS. I love your attention to quality stuff and interest in DIY rather than relying on those self taught electric street engineers :-).It would be great if you can post some detail pics along with detailed mechanism/functioning of the system. It will not only help me but also all the PW members. Consider knowldege sharing as sadqa :-). Contribute to this forum....not forcing you......just a request if you can manage easily.

Regards.

good points specially 2 and 5 also share your SAVINGS .. did u save any hard earned money of yours from Wapda.

[Sharo53]

I recommend Solar as a DIY project.. I am succesfully running one off-grid system at my village... At home, solar panels charge my HomeAge UPS batteries.

To start with.. just hook up a charge controller to your existing UPS batteries and put up some panels.. you will see longer UPS backup time in daytime and lesser energy bill

btw... i have a few 30Amp 12/24v MPPT Charge controllers.. PM me if anyone needs one

sir share the details plz...how much did it cost?
details of diy and pics too plz

[rizwan400]

Can you please share the savings on your average monthly electricity bill and how much relief from loadshedding. In your case what is the payback cycle of the set up.

Its a new setup only 2 months old. Before this setup my average bill in winter is 4000/5000. After this setup last bill I received is 2200. Next bill with energy calculation will share. My hybrid inverter also had an energy calculator in it but due to experiments it was reset several times and right now no record available. Payback is 2nd priority brother ..... bijli to mil rahi hai especially in day light you wont need to worried about load shedding. Before this setup I was using a PWM charger with my Eltek Sine wave 48V UPS. I was not satisfied with PWM charger also I was using heavy cables from roof to battery bank location because PWN charger are low voltage but in the MPPT controllers are high voltage. Difference is given below.
(Pulse Width Modulation) PWM Controllers: a FET switch is used, under control of some algorithm, to rapidly connect a power source, to a battery. The switch "makes" and "breaks" many times a second, to control the charge.
When the battery is quite low, the FET switch is ON, and the panels are connected directly to the battery, and since PC panels are a "current source" their voltage drops (or is pulled low to the battery voltage) and some power is lost, depending on the difference of the Vpmax of the solar, and the present voltage of the batteries.
PV voltage - Battery voltage = Difference x Amps = Lost wattage

Note if the array was a 200W array, amps would be 11.11Aa
18V @ 11.11A = 200watts
18V PV - 12.2V battery = 5.8V @ 11.11amps = 64.438 w lost

MPPT Controllers: [Maximum power point tracking]
a more sophisticated circuit is used, much like a "DC Transformer" to dynamically convert the power source (water, wind generator or PV panels) via an efficient DC-DC conversion process. This can also down convert high voltage DC, to suitable charging voltage for the battery, with very low losses, about 95% efficient. This is a good thing if you have a remote array - you can run high voltage DC to the controller and avoid expensive high amp wire, and incur lower losses.
The MPPT advantage vanishes when the controller switches from the BULK charging mode, to ABSORB, and does not need the extra power recovered from the conversion process, and falls back to PWM for ABSORB and FLOAT stages. This can be managed in different ways for individual systems, as many MPPT controllers have user programmable settings.

[rizwan400]

Very nice and well calculated setup rizwan bahi.Can you please guide me on the following,
1. What is the max rated dc output of the panels and what is the variation of output through out the day?
2. Does this charge controller regulate the charging voltage on the basis of current produced by panel or on the basis of battery charge depletion status?
3. Have you ever checked the panel output on a full moon night.......if yes........how much?
4. Have you tried to operate/check the panel with a few 1 to 2 watt LEDs in night? Does it max out with the power consumed by LEDs?
5. Where did you get these Sharp panels from? Are they new or used smuggled ones?
6. Did you demand efficiency check of the panel before purchasing? You are very right about the drop of efficiency of chineese panels with not only increased temp but also with time and climatic conditions.
7. How much would the hybrid system cost approx? I checked an american brand hybrid grid invertor 3kw but price was above 2,50,000. But considering its quality and features/functions, price is very reasonable.
8. Where can I find a calibrated photovoltic reference cell for efficiency checking of the panel at different times in day, night, summer, winters etc.
9. Dont you think / prefer dry deep cycle battries over these acid ones?

I am working on a solar project just for fun and mainly to kill the keera within me
People sitting in the market selling these systems dont know $h1t about these things.......they are just ripp offs.
I bieleve in proper systems with quality setup and material.

PS. I love your attention to quality stuff and interest in DIY rather than relying on those self taught electric street engineers :-).It would be great if you can post some detail pics along with detailed mechanism/functioning of the system. It will not only help me but also all the PW members. Consider knowldege sharing as sadqa :-). Contribute to this forum....not forcing you......just a request if you can manage easily.

Regards.

I can manage easily and have no problem in sharing knowledge any pakwheels fellow can PM me for any detailed discussion or meeting. I will reply your questions one by one in next post.

[rizwan400]

1. What is the max rated dc output of the panels and what is the variation of output through out the day? It was variable from sunrise to sunset.
2. Does this charge controller regulate the charging voltage on the basis of current produced by panel or on the basis of battery charge depletion status? There is priority setup in inverter that how you manage your load and charging. Kindly read the inverter manual for more details InfiniSolar 2KW/3KW Hybrid Inverte or HIGH EFFICIENCY HYBRID EXCELLENCE - eltek.com or www.eltek.com/theia/
3. Have you ever checked the panel output on a full moon night.......if yes........how much? No I didn't
4. Have you tried to operate/check the panel with a few 1 to 2 watt LEDs in night? Does it max out with the power consumed by LEDs? Funny yaar.... You may try yourself Don't mind plz.... it will not work
5. Where did you get these Sharp panels from? Are they new or used smuggled ones? There is no import duty on Solar products so Smuggling is out of question, I imported these panels from japan. Details are NA-F121(GK)NA-F121(GK) - Sharp
6. Did you demand efficiency check of the panel before purchasing? You are very right about the drop of efficiency of chineese panels with not only increased temp but also with time and climatic conditions. I already done a very detailed home work on this subject and I am satisfied with this product over made in China.
7. How much would the hybrid system cost approx? I checked an american brand hybrid grid invertor 3kw but price was above 2,50,000. But considering its quality and features/functions, price is very reasonable. The product what I am using in my system is less in cost but more in features. Products like SMA, Eltek, AEG, are expensive due to European certifications but all made in china.
8. Where can I find a calibrated photovoltic reference cell for efficiency checking of the panel at different times in day, night, summer, winters etc. You need to trust on data published by manufacturer. This is the reason that I use sharp made in Japan.
9. Dont you think / prefer dry deep cycle battries over these acid ones? Its good but expensive.

I am working on a solar project just for fun and mainly to kill the keera within me :-P.... You cant kill your Keera brother,

[alam786]

Its a new setup only 2 months old. Before this setup my average bill in winter is 4000/5000. After this setup last bill I received is 2200. Next bill with energy calculation will share. My hybrid inverter also had an energy calculator in it but due to experiments it was reset several times and right now no record available. Payback is 2nd priority brother ..... bijli to mil rahi hai especially in day light you wont need to worried about load shedding. Before this setup I was using a PWM charger with my Eltek Sine wave 48V UPS. I was not satisfied with PWM charger also I was using heavy cables from roof to battery bank location because PWN charger are low voltage but in the MPPT controllers are high voltage. Difference is given below.
(Pulse Width Modulation) PWM Controllers: a FET switch is used, under control of some algorithm, to rapidly connect a power source, to a battery. The switch "makes" and "breaks" many times a second, to control the charge.
When the battery is quite low, the FET switch is ON, and the panels are connected directly to the battery, and since PC panels are a "current source" their voltage drops (or is pulled low to the battery voltage) and some power is lost, depending on the difference of the Vpmax of the solar, and the present voltage of the batteries.
PV voltage - Battery voltage = Difference x Amps = Lost wattage

Note if the array was a 200W array, amps would be 11.11Aa
18V @ 11.11A = 200watts
18V PV - 12.2V battery = 5.8V @ 11.11amps = 64.438 w lost

MPPT Controllers: [Maximum power point tracking]
a more sophisticated circuit is used, much like a "DC Transformer" to dynamically convert the power source (water, wind generator or PV panels) via an efficient DC-DC conversion process. This can also down convert high voltage DC, to suitable charging voltage for the battery, with very low losses, about 95% efficient. This is a good thing if you have a remote array - you can run high voltage DC to the controller and avoid expensive high amp wire, and incur lower losses.
The MPPT advantage vanishes when the controller switches from the BULK charging mode, to ABSORB, and does not need the extra power recovered from the conversion process, and falls back to PWM for ABSORB and FLOAT stages. This can be managed in different ways for individual systems, as many MPPT controllers have user programmable settings.

Excellent Summary. I would like to add a few easy concepts.

1 MPPT basically changes the load condition so that the Solar Panel delivers power in its MPP region you can see the solar I-V Curve.It sits between the batteries and the generator. This differs significantly among the panels of same type and rating. Another variableis the light condition. Therefore MPPT checks the condition of the lights and adjusts load condition for maximum power delivery.

2 It sets up the battery charging algorithm based on the battery conditions. If a battery bank is full and the energy is being wasted it diverts the power to appropriate bank. You can google fast charging methods etc

3 The high current stage is between batteries and inverter. So I doubt that MPPT main function is to act as a dc converter unless itis directly connected to the Grid-Tie Inverter.

Anyways this is an excellent discussion and we all have something to learn.

[affan555]

well!!!!!! i have a question for all of you solar lovers!
when u say u need 1kw system and u can pay 300,000-400,000 ......the question is that how much is the percentage % actually you are saving from wapda bill? i mean just to cancel the bill (of some energy savers and fans or whatever in 1kw) from wapda? i am sorry its nothing,,,,,, most of the bill is due to the airconditioners!
i am not saying its useless , it is! but in agriculture ,,, or you should invest alot for home use, so that it can save the majority of ur wapda bill

[alam786]

1KWhr = about 8RS so 7 hrs = 60RS saving per day-the depreciation of the battery and electronics/panels and fault rectification.
The motive of the OP is to get rid from load shedding rather than any saving I assume.

[needhelp]

I dont think solar power is a good idea with battery pack, because then it costs too much...If u have budget of rs300,000 , then u may end up spending upto rs100,000 on invertor+battery+management etc. So instead its better to just add more panels and leave small amount for invertor only. and try to adapt to the kind of power you have...make maximum use of dc power before sending it to transformer, that way you lower losses due to transformer/invertor inefficiencies..

[tausifs]

Its a new setup only 2 months old. Before this setup my average bill in winter is 4000/5000. After this setup last bill I received is 2200. Next bill with energy calculation will share. My hybrid inverter also had an energy calculator in it but due to experiments it was reset several times and right now no record available. Payback is 2nd priority brother ..... bijli to mil rahi hai especially in day light you wont need to worried about load shedding. Before this setup I was using a PWM charger with my Eltek Sine wave 48V UPS. I was not satisfied with PWM charger also I was using heavy cables from roof to battery bank location because PWN charger are low voltage but in the MPPT controllers are high voltage. Difference is given below.
(Pulse Width Modulation) PWM Controllers: a FET switch is used, under control of some algorithm, to rapidly connect a power source, to a battery. The switch "makes" and "breaks" many times a second, to control the charge.
When the battery is quite low, the FET switch is ON, and the panels are connected directly to the battery, and since PC panels are a "current source" their voltage drops (or is pulled low to the battery voltage) and some power is lost, depending on the difference of the Vpmax of the solar, and the present voltage of the batteries.
PV voltage - Battery voltage = Difference x Amps = Lost wattage

Note if the array was a 200W array, amps would be 11.11Aa
18V @ 11.11A = 200watts
18V PV - 12.2V battery = 5.8V @ 11.11amps = 64.438 w lost

MPPT Controllers: [Maximum power point tracking]
a more sophisticated circuit is used, much like a "DC Transformer" to dynamically convert the power source (water, wind generator or PV panels) via an efficient DC-DC conversion process. This can also down convert high voltage DC, to suitable charging voltage for the battery, with very low losses, about 95% efficient. This is a good thing if you have a remote array - you can run high voltage DC to the controller and avoid expensive high amp wire, and incur lower losses.
The MPPT advantage vanishes when the controller switches from the BULK charging mode, to ABSORB, and does not need the extra power recovered from the conversion process, and falls back to PWM for ABSORB and FLOAT stages. This can be managed in different ways for individual systems, as many MPPT controllers have user programmable settings.

Very well and accurately explained.

[tausifs]

well!!!!!! i have a question for all of you solar lovers!
when u say u need 1kw system and u can pay 300,000-400,000 ......the question is that how much is the percentage % actually you are saving from wapda bill? i mean just to cancel the bill (of some energy savers and fans or whatever in 1kw) from wapda? i am sorry its nothing,,,,,, most of the bill is due to the airconditioners!
i am not saying its useless , it is! but in agriculture ,,, or you should invest alot for home use, so that it can save the majority of ur wapda bill

I guess the purpose was to have electricity when Govt cant provide you with one :). It definitely would not bring huge savings in wapda bill unless and until you don't convert the whole house on solar. I got a quote for quality system of 6 million :o along with a nightmare of changing batteries every year or two for converting the whole house on Solar which basically led me to go for a genset instead. Again the purpose of the genset is to relief me from scotching heat when wapda isn't there at all.

1KWhr = about 8RS so 7 hrs = 60RS saving per day-the depreciation of the battery and electronics/panels and fault rectification.
The motive of the OP is to get rid from load shedding rather than any saving I assume.

+1.

[tausifs]

1. What is the max rated dc output of the panels and what is the variation of output through out the day? It was variable from sunrise to sunset.
2. Does this charge controller regulate the charging voltage on the basis of current produced by panel or on the basis of battery charge depletion status? There is priority setup in inverter that how you manage your load and charging. Kindly read the inverter manual for more details InfiniSolar 2KW/3KW Hybrid Inverte or HIGH EFFICIENCY HYBRID EXCELLENCE - eltek.com or www.eltek.com/theia/
3. Have you ever checked the panel output on a full moon night.......if yes........how much? No I didn't
4. Have you tried to operate/check the panel with a few 1 to 2 watt LEDs in night? Does it max out with the power consumed by LEDs? Funny yaar.... You may try yourself Don't mind plz.... it will not work
5. Where did you get these Sharp panels from? Are they new or used smuggled ones? There is no import duty on Solar products so Smuggling is out of question, I imported these panels from japan. Details are NA-F121(GK)NA-F121(GK) - Sharp
6. Did you demand efficiency check of the panel before purchasing? You are very right about the drop of efficiency of chineese panels with not only increased temp but also with time and climatic conditions. I already done a very detailed home work on this subject and I am satisfied with this product over made in China.
7. How much would the hybrid system cost approx? I checked an american brand hybrid grid invertor 3kw but price was above 2,50,000. But considering its quality and features/functions, price is very reasonable. The product what I am using in my system is less in cost but more in features. Products like SMA, Eltek, AEG, are expensive due to European certifications but all made in china.
8. Where can I find a calibrated photovoltic reference cell for efficiency checking of the panel at different times in day, night, summer, winters etc. You need to trust on data published by manufacturer. This is the reason that I use sharp made in Japan.
9. Dont you think / prefer dry deep cycle battries over these acid ones? Its good but expensive.

I am working on a solar project just for fun and mainly to kill the keera within me :-P.... You cant kill your Keera brother,

I agree with most of your answers.
You are right about the Kerra thing but at least it would relief me from some pain......lolzzzzz.
I did my homework for solar panel and got a very huge quote for quality system (Siemens). Things and people in the market did not satisfy me in terms of energy losses and their stupid comments/concepts regarding physics and its basic principles/laws :o Every day I used to come from market LMAO at their concepts they delivered me all day (of course one has to act dumb and naughty to get that sort of knowledge from an uneducated/self educated engineer......lolz. :P). That's when I decided to go for a big genset to put my worries aside.
Really appreciated your sharing and answering all the quires.......thanks again Bro.

[fazalwahab11375]

Anyone using wind generators? Like may be in coastal areas.. Karachi?

I went to a resort last year in Tennessee and though there is electricity there. The owner is on off grid system integrating solar and wind together.

http://www.sunforceproducts.com/product_details.php?PRODUCT_ID=187

http://bergey.com/technical

I guess the purpose was to have electricity when Govt cant provide you with one :). It definitely would not bring huge savings in wapda bill unless and until you don't convert the whole house on solar. I got a quote for quality system of 6 million :o along with a nightmare of changing batteries every year or two for converting the whole house on Solar which basically led me to go for a genset instead. Again the purpose of the genset is to relief me from scotching heat when wapda isn't there at all.

+1.