In this article you will see how much does a 3 kW solar system cost, area needed to install 3 kW solar system, number of solar panels needed in 3 kW solar system and everything else.
As per MNRE, the average cost of 3 kW solar on grid system is Rs 60,000/kW, which adds up to Rs 1,80,000, And cost of 3 kW solar off grid system is Rs 62,000/kW to Rs 68,000/kW. A 3 kW solar system needs 10 solar panels each of 330 watt and a roof top area of 300 sqft.
3kW solar system price:
In the solar industry the price of solar system is based on per kilowatt value for e.g a 5 kW on grid solar system will cost Rs 70,000 / kW, which translates to a total of Rs 3,50,000.
Generally speaking, smaller the size of a solar system higher is the per kilowatt price. Also, a solar on grid system is cheaper than a off grid solar system. If you don’t know what a solar on grid system is then please check this article – Everything about solar on grid system an this one to know about solar off grid system.
Ministry of New & Renewable Energy (MNRE) sets benchmark cost every year for solar system from 3kW to 100 kW.
MNRE benchmark cost for solar on grid system from 3 kW to 500 kW:
|Solar System Size (kW)
|Cost (Rs / kW)
|Above 3 kW – 10 kW
|Rs 60,000 / kW
|Above 10 kW – 100 kW
|Rs 55,000 / kW
|Above 100 kW – 500 kW
|Rs 53,000 / kW
Note: The above pricing is benchmark cost set by MNRE, I work in the solar industry and have installed several solar on grid systems, the actual pricing goes up Rs 4,000/kW to Rs 10,000/kW for smaller systems (< 20 kW) and for larger system (> 100 kW) it generally comes down by Rs 2,000/kW to 5,000/kW. The prices totally depend on the quality of components you use.
You can download the MNRE benchmark cost for 2019 – 2020 from here – MNRE benchmark cost for solar system installation in 2019 – 2020
If you want to install a solar off grid system then it’s overall cost will be high as there are batteries involved in the system. The following cost are as per MNRE.
MNRE Benchmark Cost For Solar Off Grid System Up to 10 kW:
- 1 hour backup Rs 62,000/kW – Rs 68,000/kW.
- 3 hour backup Rs 74,000/kW – Rs 81,000/kW.
- 6 hour backup Rs 94,000/kW – Rs 1,03,000/kW.
MNRE Benchmark Cost For Solar Off Grid System Above 10 kW Up to 25 kW:
- 1 hour backup Rs 55,000/kW – Rs 60,000/kW.
- 3 hour backup Rs 66,000/kW – Rs 72,000/kW.
- 6 hour backup Rs 84,000/kW – Rs 92,000/kW.
Note: These are prices given by MNRE for a standard type of installation with standard equipment’s, if your solar panels installation has elevation, quality of equipment is top notch the prices will go up by Rs 5,000/kW – Rs 10,000/kW.
You can check out this article to know more about cost
If you live in a city or in a place where you don’t get frequent power cuts, then a solar on grid system is best for you.
Number of solar panels required in 3 kW solar system:
In 2020, almost all solar panels installer install above 300 Watt solar panels. If you are using 330 Watt solar panel (market standard) for your 3 kW system, then you will need 10 solar panels.
If you opt for smaller wattage solar panels like 250 watt, then you will need 12 solar panels to make a 3 kW = 3000 watt system.
if you are not sure about how many kW solar system your house needs, check out this article – Calculate how many solar panels a house needs.
But mind you to use electricity generated from solar panels you need a whole of other equipment’s. A 3kW on grid solar system will need following equipment’s:
|3kW Solar System Equipment’s
|Solar Panels 330 Watt Each
|Solar Inverter 3 kW
|Direct Current Distribution Box (DCDB)
|Alternate Current Distribution Box (ACDB)
|AC Cables, DC Cables, MC4 Connector
Apart from these you will need conduit pipes, meters. earthing, lightening arrestor
Area needed to install 3kW solar system:
As a rule of thumb, 3 kW solar system needs 200 sqft of shadow free area for installation considering adequate space for cleaning and maintenance.
Cross section area of a single 330 watt solar panel is 6.6 ft X 3.3 ft = 21.78 sqft.
Hence, the least area needed to install 3kW solar system (6 solar panels) is 65.34 sqft.
When it comes to area few things have to be considered.
- Your solar panels should not receive shadow for atleast 5 hours in a day
- Your roof should be able to handle solar panels load.
- The access of roof should be easy for maintenance.
3kW solar system power generation:
The power generation of solar panels depends on the angle of inclination, direction of installation (North, East, West, South), shadow impact on solar panels, number of sun hours in your locality and maintenance of solar panels.
If we assume that your solar panels are facing the right direction with proper inclination and there is no impact of shadow on it with 6 hours of daily sunshine from 10:00 am to 4:00 pm then one can expect solar generation of 4 units every day or 115 to 120 units every month.
|3kW Solar System Generation
|3kW Solar System Generation in A Day
|3kW Solar System Generation in A Month
|3kW Solar System Generation in A Year
Assume 60 days rainy season & no generation in that time
How much savings in electricity bill will 3kW solar system give?
The amount of money you save from your solar system depends on the type of solar system you install (on grid, off grid, hybrid), electricity tariff in your area, TOU tariff plan or not and type of net metering policy.
As more and more people install solar on grid system, we will look at the amount of electricity bill that can be saved by installing a solar on grid system.
In best case scenario, if your area has no TOU plan and there is net metering policy with electricity tariff of Rs 10 / unit, then a 3kW solar system can save 230 unit X Rs 10 / unit = Rs 2,300 of electricity bill every month.
|Savings From 3kW Solar System
|Electricity Savings From 3kW Solar System in A Day
|Electricity Savings From 3kW Solar System in A Month
|Electricity Savings From 3kW Solar System in A Year
You can multiply your locality electricity tariff to get your savings
As you can see that a 3kW solar system gives good savings but a lot depends on the way you install solar, so you get maximum generation out of it.
Final Verdict: Is it wise to install 3kW solar system:
As your saw above a 3 kW solar system gives good amount of monthly savings and it is a good investment for most home owners as it will give them saving for next 25 to 30 years.
If your house solar requirement is more than 3 kW then you should consider installing a bigger system.
If your budget permits and you have adequate area then you should aim to completely offset your electricity bill.
It is advised to oversize your solar system by 1 kW to 2 kW to accommodate increase in future power generation.
A 3kW solar system is a good investment, one should definitely go for it 👍👍.
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