A 1kW rooftop solar system in Kerala gets ₹30,000 from PM Surya Ghar, a 2kW system gets ₹60,000, and a 3kW or larger system gets the maximum of ₹78,000. That is the subsidy a Kerala homeowner needs to know before talking to any installer or running a cost estimate.
Key Takeaways
- Subsidy slabs are fixed: ₹30,000 for 1kW, ₹60,000 for 2kW, and a capped ₹78,000 for 3kW and above, with no extra subsidy on capacity beyond 3kW.
- Your net cost is the system price minus the subsidy, and it depends on panel brand, inverter and mounting. See the indicative price table on our homes page.
- Vendor registration matters: the subsidy applies when the installation goes through a vendor registered on the PM Surya Ghar portal.
- Disbursal isn’t instant: the subsidy is paid by DBT, typically 30–45 days after DISCOM inspection and commissioning.
- Bigger isn’t always better: going past 3kW makes sense for high-load homes, but the extra kW is entirely self-funded.
At a Glance: PM Surya Ghar Subsidy by System Size
| System Size | Subsidy Amount | Best Suited For |
|---|---|---|
| 1 kW | ₹30,000 | Small home, 1-2 person household |
| 2 kW | ₹60,000 | Small family, moderate daytime load |
| 3 kW | ₹78,000 (maximum) | Typical 3-bedroom KSEB household |
| Above 3 kW | No additional subsidy | High-load homes, time-of-day billing, hybrid setups |
How the PM Surya Ghar Subsidy Amount Is Calculated in Kerala
The subsidy works on a per-kW slab, not a flat percentage. The first 2kW of capacity earns ₹30,000 per kW, which is why a 2kW system reaches ₹60,000 total.
The third kilowatt adds ₹18,000, and the scheme caps out entirely at ₹78,000 once a system reaches 3kW or more. This cap doesn’t move even if someone installs a 5kW or 10kW rooftop system. The additional kilowatts beyond 3kW are funded entirely by the homeowner, so sizing decisions should separate “subsidised capacity” from “load-driven capacity” early in the conversation.
This structure was set centrally by the PM Surya Ghar Muft Bijli Yojana scheme, which targets one crore households by March 2027. State or other incentives are shown only after we verify them, so the ₹78,000 central ceiling is the figure to plan around.
1kW vs 2kW vs 3kW: Subsidy, Cost and Who Each Size Fits
A 1kW system suits a very small household, typically running a few fans, lights, and a refrigerator through daylight hours. It isn’t enough to offset a full KSEB bill for most 3-bedroom homes, but it works for compact flats or single-occupancy units with light daytime load.
A 2kW system fits a small family with moderate consumption, maybe one air conditioner used sparingly along with standard appliances. It bridges the gap between minimal and full coverage without demanding much roof space.
A 3kW system is the sweet spot for a typical Kerala household. It captures the full ₹78,000 subsidy and generally covers the daytime load of a standard 3-bedroom home with a refrigerator, a washing machine, and one or two air conditioners. For a closer look at exactly how many panels that size actually needs, see this breakdown on how many solar panels are needed for a 3-bedroom house in India.
Why 3kW Is the Most Common Choice in Kerala
Many homeowners end up at 3kW because it maximizes the subsidy while matching a typical household’s daytime draw. Going smaller leaves subsidy money unclaimed relative to the household’s actual consumption; going much larger without added battery storage doesn’t always translate into proportional bill savings, especially under time-of-day tariffs.
What a Typical Kerala Family Actually Pays After Subsidy
Your net cost for a 3kW on-grid system is the system price minus the ₹78,000 subsidy, and it depends on panel brand, inverter choice and mounting structure complexity. Our homes page shows an indicative price after subsidy for each size, which we confirm after a site survey.
That net figure assumes a standard on-grid setup without battery backup. Homes that add lithium battery storage to manage frequent outages or shift usage away from KSEB’s costlier evening TOD slots pay more upfront, though that additional cost sits outside the subsidy calculation entirely. A full cost breakdown for that path is available in our guide on hybrid solar system with battery cost for homes in Kerala.
Households weighing a hybrid setup specifically because of recurring power cuts should also look at sizing choices made for reliability rather than subsidy maximization, covered in our piece on the best solar system for frequent power cuts in Kerala.
How Do You Actually Claim the Subsidy and Complete KSEB Net Metering?
You claim the subsidy by registering on the national portal through an MNRE-approved vendor, completing installation, and letting KSEB finish net metering and inspection before the amount is credited to your bank account.
The process runs through specific gates. First, the homeowner registers and picks a registered vendor; SOLAR CONNECT, a registered vendor on the PM Surya Ghar portal, handles this filing for its customers. Next comes KSEB’s technical feasibility review, which the state utility’s own net metering process documentation outlines as a required DISCOM step before physical work begins.
After the system is installed and inspected, KSEB commissions the net meter and the subsidy claim moves to disbursal.
Before any of this starts, a few documents need to be in hand. Property ownership proof, a recent KSEB bill, Aadhaar linked to the bank account receiving the subsidy, and the vendor’s technical proposal all typically get requested early. Missing or mismatched paperwork here is one of the most common reasons subsidy claims stall.
Does Going Beyond 3kW Still Make Sense?
Yes, for homes with genuinely high daytime loads, but the extra capacity beyond 3kW is entirely self-funded since the subsidy caps at ₹78,000 regardless of system size.
A household running multiple air conditioners, a water heater, or a home office with constant equipment load may need 4kW, 5kW, or more to meaningfully cut its KSEB bill. The subsidy math doesn’t change, but the extra capacity can still make sense because the added generation keeps offsetting grid draw year after year.
If you’re unsure whether your home’s roof and load profile justify going larger, our guide on on-grid vs off-grid vs hybrid solar systems helps match system type to household needs before locking in a size.
One thing worth being honest about: no fixed formula predicts the exact payback period for every household, since KSEB tariff slabs, actual sunlight hours, and seasonal consumption swings all move the number. A free online calculator gives a faster, personalised estimate than any generic table.
Common Mistakes That Shrink Your Subsidy
- Using an unregistered vendor: the subsidy applies only when the installation goes through a vendor registered on the PM Surya Ghar portal; an unregistered installer can disqualify the claim.
- Oversizing beyond sanctioned load: KSEB sanctions a connection load, and a system mismatched to that sanction can delay or block net metering approval.
- Document mismatches: a name, address, or bank account detail that doesn’t match across Aadhaar, the KSEB bill, and the portal registration is a frequent rejection trigger.
- Assuming the subsidy scales linearly past 3kW: treating a 5kW system as if it earns proportionally more subsidy than a 3kW one leads to budgeting errors.
Homeowners who’ve had an installer skip proper documentation or survey steps often discover it only after a rejection. If you want a sense of what thorough versus rushed installation work actually looks like before signing anything, it’s worth reading through our list of questions to ask a solar installer before signing a contract.
Frequently Asked Questions
Is the subsidy amount the same across every district in Kerala?
Yes, the ₹30,000 to ₹78,000 PM Surya Ghar slab is set centrally and applies uniformly across Kerala, from Thiruvananthapuram to Kozhikode, since it’s a national scheme administered through MNRE rather than a state-specific allocation.
Can commercial or business rooftop owners claim this subsidy?
PM Surya Ghar is structured around residential households. Business and commercial properties in Kerala considering rooftop solar should look at it as a separate investment decision outside this subsidy, covered in our analysis of what to check before committing to an installer for any property type.
How long does the subsidy actually take to arrive after installation?
The subsidy is paid by Direct Benefit Transfer, typically 30–45 days after DISCOM inspection and commissioning. The KSEB steps before that, feasibility review and net metering, vary by section office and season. Working with a vendor who files documents correctly the first time, rather than one who has to resubmit, is the biggest lever a homeowner actually controls.
What happens if my sanctioned load doesn’t match my system size?
KSEB can hold up net metering approval if the proposed system size doesn’t align with your sanctioned connection load, which is why a proper site survey and technical proposal should happen before any order is finalized, not after.
The subsidy ceiling doesn’t move. What actually changes your final bill is accurate sizing, a registered vendor, and clean paperwork filed the first time.
Working out your subsidy and net cost is easier with real numbers from your own KSEB bill than with averages. Run your home’s details through our free savings calculator for a personalised estimate before you commit to a system size.
If you’d rather talk it through directly, including whether a 2kW, 3kW, or larger hybrid setup fits your household’s KSEB bill and roof, get a free quote and site consultation from SOLAR CONNECT, a registered PM Surya Ghar vendor, and get the subsidy filing handled end to end alongside the installation itself.