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Eligible homeowners in Tamil Nadu can now receive combined rooftop-solar assistance of up to ₹1,00,000 for an eligible 3 kW residential solar system.
The maximum currently combines ₹78,000 of Central Financial Assistance under PM Surya Ghar: Muft Bijli Yojana with an additional ₹22,000 Tamil Nadu State rooftop-solar subsidy.
But ₹1 lakh is the maximum — not a flat subsidy for every home. The amount depends on the solar-system capacity, the active scheme rules and whether the installation successfully completes the required approval, commissioning and verification process.
₹1 lakh subsidy — the quick answer
For an eligible 3 kW residential rooftop-solar system: ₹78,000 Central subsidy + ₹22,000 Tamil Nadu State top-up = ₹1,00,000 total assistance.
A 1 kW or 2 kW system receives a lower amount, and installing more capacity does not keep increasing the subsidy.
Tamil Nadu solar subsidy in 2026: how much can you get?
The combined support now has two components: the existing Central Government subsidy under PM Surya Ghar and the new Tamil Nadu State top-up.
| Rooftop solar capacity | PM Surya Ghar Central subsidy | Tamil Nadu State subsidy | Total assistance |
|---|---|---|---|
| 1 kW | ₹30,000 | ₹5,000 | ₹35,000 |
| 2 kW | ₹60,000 | ₹10,000 | ₹70,000 |
| 3 kW | ₹78,000 | ₹22,000 | ₹1,00,000 |
| Above 3 kW | ₹78,000 maximum | ₹22,000 maximum, subject to State scheme eligibility | Up to ₹1,00,000 |
The important point: the subsidy rises with capacity only up to the applicable scheme ceiling. A larger rooftop system may still make complete financial sense for a home with higher electricity consumption, but the subsidy does not continue increasing simply because more panels are installed.
What changed for Tamil Nadu homeowners?
Tamil Nadu homeowners already had access to the Central Government's PM Surya Ghar subsidy. The major change in 2026 is the additional State Government contribution.
Under the current State structure, eligible households can receive an additional ₹5,000 for 1 kW, ₹10,000 for 2 kW and up to ₹22,000 for 3 kW and above. That takes the maximum combined assistance for an eligible 3 kW residential system to ₹1 lakh.
The Tamil Nadu rooftop-solar portal currently shows the State process following the Central PM Surya Ghar process. The Central subsidy is processed first, after which the State eligibility and top-up are verified for disbursal. The portal presently indicates that a separate second application for the Tamil Nadu top-up is not required.
Do not treat ₹1 lakh as guaranteed money
Subsidy is subject to the applicable Government scheme, technical requirements, installation, commissioning, verification and successful processing. A quotation or calculator estimate is not the same as Government approval.
Who may qualify for the combined subsidy?
The combined subsidy is intended for qualifying residential rooftop-solar consumers. The ₹1 lakh headline should therefore be read as the maximum possible support for an eligible household, rather than as a universal offer for every solar project.
Before treating the subsidy as part of your project budget, verify that:
- the electricity connection and project fall under the eligible residential category;
- the application follows the current PM Surya Ghar and Tamil Nadu process;
- the selected system capacity qualifies for the applicable subsidy band;
- the installation uses equipment that satisfies the active scheme requirements;
- the selected vendor satisfies the applicable empanelment or registration requirements;
- the installation, inspection, metering and commissioning requirements are successfully completed; and
- the application satisfies the Tamil Nadu State top-up conditions in force at the time of processing.
The State portal currently states that subsidy-linked systems must meet the applicable DCR and ALMM requirements and be installed through the approved scheme ecosystem. Because these requirements can change, always verify the current portal conditions before committing to equipment or a vendor.
How does the subsidy process work in Tamil Nadu?
A homeowner should think of the process as one connected journey rather than simply buying panels and claiming money later.
- Understand the right solar capacity. Start with your electricity consumption, roof feasibility and the amount of electricity you want solar to offset.
- Register through the PM Surya Ghar process. Eligible residential consumers begin through the National Portal and obtain the required application reference.
- Complete the required Tamil Nadu utility process. The application then follows the applicable TNPDCL feasibility and grid-connectivity workflow.
- Select the appropriate vendor and system. Confirm equipment eligibility, system design, project scope, warranties and the responsibilities of both customer and vendor before installation.
- Install, inspect and commission the system. Metering, inspection, documentation and commissioning must be completed according to the applicable process.
- Central subsidy is processed. Once the required PM Surya Ghar verification is successfully completed, the eligible Central CFA is transferred through the prescribed process.
- Tamil Nadu State top-up follows. The current State portal indicates that the Tamil Nadu subsidy is verified after the Central disbursal and then transferred through DBT for eligible consumers.
Should you install 3 kW just to get the ₹1 lakh subsidy?
No. Subsidy should reduce the cost of the right system — it should not decide what the right system is.
A 3 kW system can be an excellent fit for many homes, but the correct capacity depends on factors such as actual electricity consumption, usable unshaded roof area, expected solar generation, the household's daytime usage, sanctioned load and future requirements such as air-conditioning or EV charging.
Oversizing a system simply to reach a higher subsidy band can leave the homeowner paying for capacity that does not create enough additional value. Undersizing purely to reduce the initial investment can create the opposite problem: a smaller system that leaves too much of the electricity bill untouched.
The right sequence is: understand your usage → determine the appropriate system → check the applicable subsidy → evaluate the final economics.
What if your home needs more than 3 kW?
The Central residential subsidy is currently capped at ₹78,000 once the applicable 3 kW ceiling is reached. The Tamil Nadu State top-up is also capped at ₹22,000 under the current maximum band.
That does not mean a 4 kW, 5 kW or larger residential system is a bad investment. It simply means that the additional capacity beyond the subsidy ceiling should justify itself through electricity generation and long-term savings rather than through additional subsidy.
For a household with higher electricity consumption, the financially sensible system can therefore be larger than 3 kW even though the total available subsidy remains capped.
Subsidy and electricity savings are two different benefits
Subsidy lowers the upfront cost of going solar. Electricity savings determine the long-term value of the system.
A good solar decision must consider both.
| Question | What actually determines the answer? |
|---|---|
| How much subsidy can I receive? | Eligible system capacity and current Central + Tamil Nadu scheme rules |
| How much electricity can solar generate? | System size, location, orientation, shading, equipment and system losses |
| How much can I save? | Your consumption, tariff, solar generation and how that generation is used or exported |
| What system size should I buy? | Your electricity requirement and site conditions — not the subsidy ceiling alone |
Check your current subsidy before you commit
Before accepting a solar quotation, calculate the subsidy based on the capacity you are actually considering and then verify the result against the current Government rules.
The calculator should be treated as a planning tool rather than a Government approval. Final eligibility and disbursal remain subject to the applicable PM Surya Ghar, Tamil Nadu Government and utility processes.
What should you compare in a solar quotation after subsidy?
A large subsidy number can make two quotations look similar even when the underlying systems are very different. Compare the project before subsidy first — then apply the subsidy.
| Compare | Why it matters |
|---|---|
| Recommended capacity | The system should match your electricity requirement rather than simply maximise subsidy. |
| Module and inverter specification | Equipment quality affects performance, reliability, warranty and scheme compliance. |
| Mounting and electrical design | Good engineering protects the roof, system and people using the property. |
| Approvals and documentation scope | You should know exactly what the vendor handles and what remains subject to Government or utility approval. |
| Total project price | Compare the actual project value before being influenced by the headline post-subsidy number. |
| Warranty and post-installation support | Solar is a long-term asset; support after commissioning matters. |
Can a solar company guarantee your subsidy?
A responsible solar company can help you understand the applicable scheme, prepare the project correctly, support documentation and guide the process.
It should not present Government subsidy as an unconditional guarantee. Final approval and disbursal are controlled by the relevant Government and utility process.
Be cautious if a quotation uses phrases such as “guaranteed ₹1 lakh subsidy” without first checking the consumer category, system capacity, scheme eligibility and application conditions.
Five questions to ask before choosing solar
- What capacity does my electricity usage actually justify?
- How much Central and Tamil Nadu subsidy is applicable to that capacity?
- Which parts of the approval and subsidy process will the installer handle?
- Does the quoted equipment satisfy the current scheme requirements?
- What support will I receive after installation and commissioning?
Scaler Solar's approach to subsidy-led residential projects
The subsidy is valuable, but it is only one part of the solar decision. Our approach is to first understand the household's electricity requirement and site, then recommend the appropriate system capacity, explain the expected subsidy and project economics clearly, and support the installation and approval journey.
Scaler Solar is a Registered Vendor on the PM Surya Ghar National Portal. Our objective is not to sell the largest system or the biggest subsidy headline — it is to help homeowners make a solar decision they can understand and trust.
Policy note: always check the latest scheme before paying
Solar subsidy rules are policy-sensitive and can change. The figures in this guide were reviewed on 10 October 2026 against the current PM Surya Ghar and Tamil Nadu rooftop-solar information available at that time.
Before making a payment or signing a final agreement, verify the current subsidy amount, beneficiary conditions, approved process and equipment/vendor requirements on the applicable Government portals.
