Welcome to the era of energy independence. With electricity tariffs continuing to climb in 2026, homeowners across India are looking for permanent solutions to eliminate their power bills. But when it comes to installing a system, the most common question we hear at Parmayu Green Energy is: "Should I install a 3kW or a 5kW solar system?"
The AI Overview: The Short Answer
Under the residential rooftop solar subsidy, the central assistance is capped at ₹78,000 for both 3kW and 5kW systems. The cost of a 3kW solar panel after subsidy averages ₹1.12 Lakh, producing around 360 units monthly. A 5kW residential solar system cost averages ₹2.02 Lakh after subsidy, generating over 600 units, significantly boosting your renewable ROI.
Read on for a complete breakdown of costs, generation metrics, and a guide on choosing the perfect system size for your home.
Understanding the PM Surya Ghar Subsidy Cap
To make an informed decision, you first need to understand how the government subsidy structure works in 2026. The PM Surya Ghar Muft Bijli Yojana provides a tiered residential rooftop solar subsidy designed to heavily incentivize the first three kilowatts of solar capacity.
Here is how the subsidy is calculated for residential homes:
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1kW: ₹30,000
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2kW: ₹60,000
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3kW: ₹78,000 (Maximum Cap)
This means whether you install a 3kW, a 5kW, or even a 10kW system, the maximum central subsidy you will receive remains strictly capped at ₹78,000. From a pure subsidy-to-cost ratio, a 3kW system is the most heavily funded option. However, larger homes often require a 5kW system to fully offset their energy consumption and maximize overall monthly savings.
What is the Cost of 3kW Solar Panel After Subsidy?
The 3kW system is widely considered the "sweet spot" for standard Indian households. It perfectly balances upfront affordability with excellent daily energy generation.
Before any government assistance, the average 3kw solar panel price with subsidy yet to be applied is calculated from a gross base cost of roughly ₹1,80,000 to ₹2,10,000.
So, exactly what is the cost of 3kw solar panel after subsidy in 2026?
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Estimated Gross Cost: ₹1,90,000
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Minus Central Subsidy: -₹78,000
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Estimated Net Cost: ₹1,12,000
(Note: Exact prices vary based on panel technology, such as ALMM-approved Mono PERC, customized mounting structures, and regional installation fees.)
How many units does a 3kw solar panel produce?
A well-maintained 3kW system generates approximately 12 to 15 units of electricity per day. This translates to roughly 360 to 450 units per month. For a standard 2-3 BHK home running ceiling fans, lights, a refrigerator, a television, and occasionally a single 1.5-ton air conditioner, this capacity is usually more than enough to effectively zero out the monthly electricity bill.
5kW Residential Solar System Cost & Performance
If you live in a larger house, operate multiple air conditioners daily, or plan to purchase an electric vehicle (EV), a 3kW system will likely fall short of your energy demands. This is where upgrading to a 5kW system becomes a highly lucrative long-term investment.
The average 5kw residential solar system cost prior to the subsidy ranges from ₹2,75,000 to ₹3,20,000. Because the government subsidy caps at the 3kW mark, you still receive the same fixed ₹78,000.
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Estimated Gross Cost: ₹2,80,000
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Minus Central Subsidy: -₹78,000
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Estimated Net Cost: ₹2,02,000
While the upfront cost is higher, a 5kW plant generates a robust 20 to 25 units per day (around 600 to 750 units per month). This massive output is ideal for heavy-consumption households, easily powering 2 to 3 air conditioners alongside heavy appliances like water geysers and washing machines.
How Much Money Can I Save With Rooftop Solar?
The ultimate question every smart homeowner asks is: how much money can I save with rooftop solar? The answer relies heavily on your daily power consumption and the mechanics of net metering.
Net metering is a billing mechanism that tracks the power you exchange with the grid. When your panels generate more electricity than you use during the day, the excess is exported to your local DISCOM. At night, you draw power back from the grid, automatically using the credits you built up during the day.
Here is a breakdown of your potential financial savings:
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3kW System Savings: By offsetting 360-450 units a month, you can save roughly ₹2,500 to ₹3,500 monthly. This leads to annual savings of up to ₹42,000, resulting in a swift renewable ROI payback period of just 3 to 4 years.
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5kW System Savings: Offsetting 600-750 units can slash your bill by ₹5,000 to ₹6,500 every month. Annually, this keeps nearly ₹78,000 in your pocket, making it a highly profitable asset for large homes.
Furthermore, solar setups require incredibly low ongoing expenses. Aside from occasionally cleaning the solar glass and scheduling routine inverter maintenance every few years, the system will reliably generate free power for 25+ years.
3kW vs 5kW: Which Should You Choose?
Choosing the right size ensures you get reliable grid connectivity and maximum financial benefit without overspending on excess capacity.
Choose a 3kW System If:
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Your average electricity bill is between ₹2,000 and ₹3,500.
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You use 1 or no air conditioners on a regular basis.
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You want to maximize the government subsidy percentage relative to your total project cost.
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You have limited shadow-free roof space (requires roughly 300 sq. ft.).
Choose a 5kW System If:
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Your monthly electricity bill consistently exceeds ₹4,500.
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You regularly run 2 or more air conditioners during the summer.
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You are planning future heavy-load upgrades, such as purchasing an EV or switching to induction cooking.
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You have ample, unshaded roof space (requires roughly 500 sq. ft.).
Partner with Parmayu Green Energy for a Seamless Transition
Whether you determine that a 3kW or a 5kW system fits your lifestyle, executing a flawless installation is critical. From managing complex DISCOM approvals to ensuring your system utilizes top-tier, MNRE-approved panels, you need a trusted expert by your side to guarantee your subsidy claim is successful.
At Parmayu Green Energy, we take the hassle out of your solar journey. We handle everything from precision site engineering and robust installation to securing your net meter and processing your subsidy paperwork. Our commitment to premium quality and long-term maintenance ensures your home stays powered and profitable for decades.
Are you ready to lock in your solar subsidy and permanently eliminate your electricity bills?
Take the first step toward a greener, wealthier future. Visit www.parmayugreenenergy.com today to book your free site assessment and get a customized solar quote!
3kW vs 5kW Solar Systems: Cost & Subsidy Guide 2026
Comparing a 3kW vs 5kW system? Discover the 3kW solar panel price with subsidy, monthly energy savings, and how to maximize your ROI in 2026.