Solar system for home l Cost, Saving,Subsidy with Excel Calculation l Labour Law Advisor

Solar system for home l Cost, Saving,Subsidy with Excel Calculation l Labour Law Advisor

When we got solar installed in our house, so there were a lot of questions in mind How much electricity will be generated?

Will there be electricity in the rain or not? How much will it cost in starting?

How much will get the subsidy? 

What will be the net saving? 

Will install which company's solar system?

Will install inverter of which company?

Are batteries required or not? 

What' is on rate system? 

What is Net Metering?

Then what? engaged in research. Asked the vendor, asked friends, The people who had installed around us, we went to their homes and asked please! tell us something about this. and, after research for many months finally, we took the decision to install solar at home which was a much better decision This is a 5 KW solar plant installed on our roof. And while applying it, keep in mind in which direction you are putting it? At which angle are you putting it? that is important too, for your efficiency so installing solar at home is beneficial financially and environmentally. that we know. 

But what is lacking is knowledge. But friends, it will not be there after today's video we will tell you each and everything every little thing What you should know before installing solar at home. For installation cost, if capital is less, So its solution will also be found in this site. If you want to compare the return of solar with FD/Mutual Fund, its Excel calculation will also be found in this article. And those who help me to convey this complete information.  am the CEO of Solar Square Energy . 

We are a residential Solar company We install rooftop solar in houses, in flats, in a housing society : So the aware public, pick up the paper, hold your pen tightly let's begin So first, I ask you a very simple question. When we talk about electricity, then 3 numbers generally come to mind. 

 The electricity bill that comes, is visible the second thing that comes up is the number of units and third thing that comes is kilowatt (KW) When we are installing solar, we hear 5KW, 3KW so, what is the co-relation between these three numbers? if you can explain with an example. The KW that we say is the capacity/power rating of the solar system this system of rating, How much electricity will it make now? That electricity we measure in units If you receive 300 units, 400 or 500 units in your electricity bill for your month so that units * kilowatt-hour (KW) means, rating * exposure time How much did you use that power? that calculates your units so this is the relationship between these three things if your monthly consumption is roughly 350 units That is, your monthly bill will be Rs. 3500. and you have the requirement of a 3KW rating solar system.  

 So if I understand it like this If I have installed 3 KW system, And that will last for 1 hour, So it will make 3 units of electricity according to 3 kilowatts hour is it true?Absolutely correct. but there is one thing that solar, it runs with your sun's radiation So when the sun rises in the morning So the light comes on at a slight angle. The sun is absolutely up at 12 o'clock in the day So it produces its peak power So when we say your solar system is of 3 kW rating so that is its peak rating means, it will give 3 kilowatt power at 12 o'clock Power is a little less at the time of sunrise and sunset. The effective maths of solar is, That 1-kilowatt solar system that we install at home roughly gives 1400 units of the year.

Okay, understood. and the average rate of one unit is running between, 8 to 10 rupees running between You understand that about 12 to 14 thousand rupees of electricity One kilowatt plant will make annually. Exactly 8 to 10 rupees, this is the rate of electricity in India there are some exceptions Like Maharashtra has the electricity of 13 to 14 rupees and some exceptions are like, like union territories, where the electricity is of 6 rupees. 

Where knows how many units per month are spent on the electricity bill that comes to their I take an example There is a bill for 1000 units in my house in summer. In winter, suppose a bill of 500 units comes. on an average, it is something like 750 units so, for me So now which capacity solar system will be the most financially viable for me? Should I set up on the higher side, for 1000 units? or should I go with lower-side for 500 units?Yes, so the solar system that you buy it will always decide by your monthly average consumption That is, you will run cooler/AC in summer then you will consume more If you don't even run a fan in cold weather, you will consume less So always when we design the solar system So we take the average of the year in this So suppose if you take the average of 6 or 12 months You will see that, it shows your average consumption for the last 6 months the maths is simple for this, 1-kilowatt system that will give you 1400 units a year if you divide 1400 by 12 So there are 116 units in the month Now, will this solar system give the same 116 units every month? No. It will give more units in the summer It will give a little fewer units in the month of monsoon but what is the average of the year, So much solar has been installed in India, and around the world. this 1400, the average for the year You can hold it right In this, only a 2-5% difference comes up or down. So if you look at your house bill So always buy a solar system according to the average consumption of your house .Okay, So for the benefit of the audience here we can show a table Inside which you check according to your table Your average consumption of this unit is approximately this, So which solar plants will you need? Okay? In the same part, a small point is there, that few people know which is about Sanctioned load Let's say if my ceiling is too large And I thought, why do I install 5-10 kilowatts? I will install 50 kilowatts but can we do that? and if no, then why?  Yes, so first to decide the system for solar, we see three things no. 1, how much your electricity consumption is? That is, how many units do you require? The second thing we see is, how much shadow-free space is available on the roof? because for solar, shadow-free space is required its space calculation is very simple if I say roughly, then, for a 1KW solar system, we require a shadow-free space of 100Sq. Ft. The 3rd and last thing that we see is, in your bill,  which is written on so many bills as what is that yours? in most of the states of India, it is the rule that that the solar system cannot exceed your regular load or Sanction load means, according to your consumption and the space of your rooftop Suppose you want to buy a solar system of 8KW. but your regular load is just 5kw so you have to increase your regular load that means you have to change/increase your load You can also do this load increase easily by applying with the electricity department. So even if you take solar from solar square So if you need load change in the bill So we get it done for you, only after that we do your solar installation and application .

 Now  we want to ask there are two types of systems On-Grid and Off-Grid what is the difference between both? And which system is mostly what we put at home?  Sure, So On-Grid, as suggested in its name this system is connected to your electricity bill grid Off-grid, which has nothing to do with your electricity grid that is an independent, private, personal solar system which installed on your rooftop a battery comes with an Off-Grid system by which, whatever the electricity that produced because electricity will not be generated at night So only in the sunshine hour till the sun is there, electricity will produce So you can make your whole day's electricity in that sunshine hours you consume in the daytime whatever you want to consume the electricity of evening and night you put it in your battery And then take that electricity from the battery in the evening and at night But in the On-Grid system, there is no requirement for a battery this system is connected with a grid The grid you have is the one that acts as a battery for you. 6 hours a day when there is sunlight Then you make electricity for the whole day you run your appliances, and your AC during the day Whatever you consume is made from your solar and is consumed in your home. whatever extra electricity you make, that you put in the grid You take that electricity from the grid after sunset this exchange of electricity that you put the electricity in the grid during the day got electricity back from the grid in the evening and night this will net off in your bill i.e., if you give 100 units and withdraw 100 in the grid then your bill will come to zero unit the facility of exchanging with a grid is, called Net Metering This facility, all over India in every state and union territory of India the government of India has made it a consumer right .

So if I understand it correctly So for example today My solar plant made 10 units of electricity in 6 hours And I consume 12 units of electricity from the whole day and night together So the final money that I have to pay to the electricity department is for 2 units or let's say, I consumed only 8 and I made 10 units, so I have 2 extra units with me Probably I will get that money from the electricity department. Yes, absolutely correct So if you make your 10 units and consumed 12 units so you take that excess 2 units from the grid, And 10 units will be made from your solar for free If you make 10 units and consume only 8 so it will be minus 2 units (-2) i.e., you gave two units to the grid these units get carried over to you every month. So for example, suppose you installed solar at home and you went out on holiday for 15 days So what will happen to whatever electricity is generated at that time? You didn't consume anything at home All that electricity goes to the grid And you also get that benefit in Monthly Roll Over Bill but after 12 months, it will have lapsed So when we design solar systems, Rishabh! We do that on the basis of the average of the yearly consumption. 

 So that means here is no point to install an excess capacity plant What is your consumption, install accordingly Because if you make more electricity than that, it will lapse. Sure Some people have this question Can we sell electricity to the grid by installing a little more system? we buy for 8 rupees, If we gave 100 units of the month to the grid So can we earn 800 rupees a month? then it is not like that because whatever you give excess after twelve months from that not zero but in some states 1,2 or 2.5 rupees, depends on State to State so no benefit of this because, according to the cost of your solar you take its benefit on 8 rupees then your economics build If someone gives you 2 rupees for that electricity so there is no economic viability so we never design excess capacity.

Understood so now it is clear to users 90% cases in India, you don't need battery You will install on grid system and the cost of the battery is not involved in our equation Now, maybe people thought these as some silly questions, but still, need to ask because it comes from an audience that if I installed solar and it rained that day so light will go on in my house? alternatively, If someday, the light is not coming from the grid The power went out and I installed the solar So will all the fan lights keep on running in my house? Yes, so this solar system is, there is only one weakness of grid connected solar system when the grid is off, the system automatically shuts down Otherwise, if this system continues to generate electricity and keep doing reverse push in the grid and if grid is off, it is a safety risk / fire risk so, in this grid connected system It generates electricity only when your grid is on When your light goes out, the power of the house will go off So your solar system automatically shuts off. So, So this is a very good point you said, that if the power went out So it is not that if you have installed solar, then the light fans will continue to run in your house. that won't happen. Okay If you also want a backup for the power cut so today, people buy solar to reduce their electricity bills to zero. those who want backup They also buy a battery backup with Solar for 1 to 2 hours we call it hybrid system i.e., grid is also connected but when grid will be off so it will run on battery so, three types of systems are there On-Grid system, Hybrid-system, Off-Grid system. At the time of net-metering, do we understand by looking at our electricity bill? how much of our electricity has gone to the grid this month? Can we go to our meter and check it? that this month, how much electricity has come from solar? Because I know that most company even solar square gives you a data, But how much is coming on paper, from where we can check?  Yes, definitely We have three parameters in this How much electricity did your system make? how much electricity does your system put into the grid? And how much electricity was taken from the grid? if you understand these three things, So you can understand your electricity bill completely The electricity bills that come in India are very confusing and it will take 2 to 3 months, after installing a solar in any house, a new bill comes it is called the solar bill That is, your electricity department which gives you the bill before solar And the bill it gives after solar, that bill looks different Import export of solar is explained in it. So you can also see from your bill how much net import-export you do? the app we give you, You can see how much electricity your solar system generated from it. so, by seeing these two things, bill and your app You can better understand your electricity bill.To install one on-grid system, you tell me from the top From Solar Panel to Connecting Meter which components are required mainly? What a consumer should know. Sure, most of the people said the solar system we want to purchase solar panel in house but actually, the panel is only the part of the system Many components use into a solar system so, the solar panel is definitely an important part the same panel that the blue plate you see who takes light from the sun and convert it into an electricity other than this, the heart of the solar system is, which you can say it's engine or brain if I say then, it is inverter The inverter makes direct current, i.e., DC the Inverter convert it into AC (Alternating Current) And in our house, we run appliance fans and AC that all runs on AC current so, the second component is the inverter The third component, which is the most important part of the Solar system that is Structure. On which metallic structure you install your solar panel. So many people think that, If took the module and inverter, then So now the structure can be anything it is some civil work, What we are doing is putting solar on it if your structure is not galvanized in proper zinc not of proper material So your solar structure will start catching rust after 2-3 monsoons. by holding rust that the structure will weaken Rishabh! the life of the solar system is of 25 years. That is, it will be on your roof for 25 years, it will make electricity Its integrity should remain strong for 25 years so the design of that structure its wind speed handling and it's being rustproof Made from the right material and the right grade galvanize in zinc, very much important. The 4th component is cables.

There will be many cabling connections in the solar system These cables will be kept for 25 years in the outdoor weather rats can bite them There will be weathering on them wear and tear will happen on it Keeping all that in mind, the right cable has to be installed. so that the cable never gets damaged/exposed Apart from this, there are 15-20 more components. But, these are the four main components one more thing, which is not a component of solar but is very important that is After Sale service and AMC Like we buy Annual Maintenance Contract (AMC) with AC Similarly, to make the solar system perform well year after year its preventive maintenance, health checkup, its AMC (After Sale Service) is very important so this is not hardware, is a service component of a solar system, which is very much important. Now I want to ask that, let's take an example because, as you told me, 70% people in India, install a plant around 3KW So what is the cost of setting up a 3-kilowatt plant? without any subsidy And if we put 5 kilowatts, put 10 kilowatts So by multiplying it in the same ratio can we calculate by 5,10 or any other kilowatt . Yes, so in the cost calclation of solar system, a lot of things matter in it Which technology did you take? Modules come with a variety of technologies in modules like, poly PERC, mono PERC mono perc half-cut solar, so many technologies there Similarly, there are many technologies of inverters. string inverter, optimizer, micro inverter structure have also many grades, types you installed the solar structure in 1ft or on 6ft you have sloping roof at your house, you installed on sloping roof or shingles This cost depends on many things but, whatever the per kilowatt cost is, you assume that, like, from Rs. 45,000 up to Rs. 60-65,000 per KW, the cost of solar system is, the Government of India also gives subsidy on this cost So if we have a 3-kilowatt system Because, in most of the houses which are required, it is 3 KW and if I will keep an average of 50,000 the cost of the solar system. So, the system is of Rs. 1.5 lakh in different states, On this, the government gives subsidies at different rates. the max if you see, then the subsidy of 40-45,000 rupees, This subsidy program is currently active in many states of India. And this subsidy is given to the consumers. i.e., if after subsidy which is the cost of landed solar system, The cost of 3 KW systems will be around Rs. 1.25 lakh This 3-kilowatt system as we talked about earlier Will make 350 units for a month and through this, you will almost save 3-3,500 rupees in your electricity bill That is, the system of Rs.1.25 lakh will give you savings up to 30,35,or 40,000 rupees a year,  in four years, your cost will be completely recovered from that after that it's free. After that, you will enjoy free electricity for 21 years One thing to always remember while buying solar that today if your electricity is of 8 rupees After 10 years, the same electricity in 16 rupees, 100% means it would have been doubled so the saving of solar, it will grow a little every year. But  as you told its service life is 25 years In 25 years, obviously the ability to generate electricity for the machine it goes down too.So, the solar system is, if today your system give you 100 units so, after 25 years This point degrades every year from 0.7% linearly this is the electronic mechanics of solar panel So its performance decreases slightly by 0.7% Your electricity price goes up That's why your savings are constant or better from year to year.  Understood, that's a very good point Because most people think that after 25 years it becomes totally zero. that means, it is not like that It will continue to give electricity around 80% even for 25 years. Very rarely, there is reduction in it But, right now I want to ask when I was installing solar at my house.