Solar FAQs for
Kerala Homes

A rooftop solar system in Kerala typically costs between ₹70,000–₹90,000 per kW before subsidies. A popular 3 kW system runs ₹1.85–₹2.15 lakhs before subsidy. After applying the government's PM Surya Ghar subsidy of up to ₹78,000, your out-of-pocket cost comes down to approximately ₹1.1–₹1.4 lakhs. Pricing varies based on panel brand, inverter type, and your roof's structural requirements.

This is the central government's flagship solar subsidy scheme. It offers fixed Central Financial Assistance (CFA) to residential customers installing on-grid rooftop solar systems. The subsidy is structured as follows — up to ₹30,000 for 1 kW, up to ₹60,000 for 2 kW, and up to ₹78,000 for 3 kW and above. The maximum subsidy is capped at ₹78,000 regardless of system size. The amount is credited directly to your bank account within 30 working days of commissioning.

Given Kerala's high electricity tariffs (₹8–₹9 per unit) and strong solar irradiation, most homeowners recover their investment in 3–5 years. After that, you generate effectively free electricity for the remaining 20+ years of the system's life.

Yes. Many banks and NBFCs now offer dedicated solar loans at 6–8% interest rates. In several cases, your monthly EMI is less than your current KSEB bill savings — meaning the system pays for itself from day one. Rayenna can guide you through financing options best suited to your situation.

No. The government subsidy under PM Surya Ghar is only available through MNRE-empanelled vendors. Choosing an unapproved installer means you forfeit the ₹78,000 subsidy entirely. Rayenna Energy is an MNRE-approved channel partner, so your subsidy eligibility is fully protected.

Yes — and the timing is currently very favourable for Kerala buyers. India's solar manufacturing capacity has grown enormously, and with US tariffs reducing export demand, domestic panel prices have become increasingly competitive. Combined with the PM Surya Ghar subsidy still being available and Kerala's rising KSEB tariffs, 2025–2026 represents one of the better windows in recent years to invest in solar. Our team can give you a current market price based on your specific system requirements.

Panel prices have dropped approximately 80% over the last two decades and are expected to remain stable or decline marginally in the near term due to India's expanding domestic manufacturing capacity. However, the PM Surya Ghar subsidy amount is not guaranteed to remain at current levels — government schemes are reviewed periodically. The smarter approach is to lock in current pricing and subsidies rather than wait for further price drops that may be offset by subsidy reductions.

Yes. Businesses registered under GST can claim input tax credit on the GST paid for commercial solar installations. Solar panels currently attract 12% GST. This effectively reduces the net cost of a commercial installation, improving your overall return on investment. Consult your chartered accountant for the specifics of your GST registration category.

Currently, the primary subsidy available is the central government's PM Surya Ghar scheme offering up to ₹78,000. Kerala's state agency ANERT has run state-level schemes in the past, and KSEB has its own Soura programme history. It is worth checking anert.gov.in for any active state schemes at the time of your installation. Our team stays current on all available incentives and will ensure you claim everything you are entitled to.

ALMM is MNRE's Approved List of Models and Manufacturers. From June 2026, new grid-connected rooftop systems generally require ALMM-listed modules. For PM Surya Ghar subsidy, panels must also meet Domestic Content Requirement (DCR). Before signing, confirm your installer's proposed model is on the current ALMM list and matches your invoice — non-compliant hardware is a common reason for subsidy rejection or delay. Rayenna uses MNRE-approved, subsidy-eligible equipment and verifies compliance on every project.

The scheme targets solarising one crore Indian households nationwide. By FY26, over 31 lakh installations were completed and application-to-installation conversion improved sharply — meaning the programme is advancing toward its cap. Subsidy rules and budgets can change once national targets are met. Kerala's rooftop market is also growing fast (roughly 55% year-on-year in FY26). If you are considering solar, locking in today's subsidy and pricing is generally smarter than waiting for an uncertain future revision.

As a general rule, you need approximately 100 square feet of shadow-free rooftop area per kW of solar capacity. So a 3 kW system requires around 300 sq. ft. of clear, unshaded roof. South-facing roofs provide the best output in Kerala, though east- or west-facing roofs also work well.

Your roof should be structurally sound enough to support the panels and mounting structure. If your roof has existing damage or is due for repair, it's best to address that before installation. Our team will assess your roof's condition during the free site survey and advise you accordingly.

Yes. Both traditional Mangalore-tiled and modern ceramic-tiled roofs in Kerala can accommodate solar panels using specialised hook-and-rail mounting systems. Our installation team is experienced in leak-proof mounting for Kerala's roof types and will ensure your roof remains watertight after installation.

South-facing is optimal for maximum annual generation. East- or west-facing installations also perform well, though output may be marginally lower. What matters most is that the panels are not shaded between 9 AM and 4 PM — this is when the bulk of solar generation occurs.

Yes, in most cases. Our site survey team will map your usable roof space, working around existing structures. The key is identifying contiguous shadow-free areas that face south, east, or west. Even partially obstructed roofs can accommodate a meaningful solar system — we design around your specific layout rather than applying a generic template.

For most Kerala homes, a 2 kW system is the practical minimum for meaningful bill savings. Below 2 kW, the savings may not justify the installation overhead. Most Kochi households with bills above ₹2,000 per month benefit most from a 3–5 kW system. Our free Solar Calculator will give you a personalised recommendation based on your actual consumption.

Yes, this is called a phased installation and is entirely possible. Your inverter capacity and available roof space are the key constraints. If you plan to expand in the future, we design your initial system with this in mind — using an inverter with headroom for additional panels and routing wiring to accommodate future expansion. Tell us your future plans during the initial consultation.

An on-grid system is connected to the KSEB grid. It is the most common and cost-effective option for Kerala homes — excess power is exported to the grid via net metering, and you receive credit on your bill. An off-grid system runs entirely on batteries and is suitable for areas with no grid connection. A hybrid system combines grid connectivity with battery backup, giving you power during outages while still using net metering. For most Kerala homes, an on-grid system is the smartest financial choice.

Net metering allows you to export surplus solar electricity to the KSEB grid during the day and draw power back at night. KSEB credits your account for the units you export, which offsets your bill. Effectively, the grid acts as a free battery — you bank energy during the day and use it at night.

Yes — and better than you might expect. While generation does drop by 20–30% during the peak monsoon months of June–August, a well-sized system in central Kerala still produces approximately 600 units during those three months. Over a full year, a 3 kW system typically generates around 3,600 units, already accounting for monsoon losses. Solar remains highly viable in Kerala year-round.

A standard on-grid system automatically shuts down during a power outage — this is a safety feature required by KSEB to protect grid workers. If you need power during outages, a hybrid system with battery backup is the right choice. Talk to our team and we will help you decide what's right for your home.

In Kerala's conditions, a well-installed 3 kW system generates approximately 10–12 units per day on a clear day, and around 3,600 units annually when averaged across all seasons including monsoon.

Yes. All Rayenna installations include online monitoring capability. You can track your system's real-time generation, daily and monthly output, and performance trends through a monitoring app on your phone. This lets you spot any underperformance early and gives you a clear picture of your savings accumulating over time.

TOPCon (Tunnel Oxide Passivated Contact) is a newer panel technology offering higher efficiency — typically 22–23% — compared to standard PERC panels at 19–21%. Bifacial panels generate power from both sides, capturing reflected light from the roof surface. Both technologies are now available in India and can be worth the modest premium for Kerala's conditions, especially if your roof space is limited and you want to maximise output from a smaller area. Ask our team whether these make sense for your specific installation.

Research consistently shows that solar installations increase residential property values, typically by 3–5% of the property value. In Kerala's increasingly energy-conscious market, a solar-equipped home with low electricity bills is an attractive selling point. The system transfers with the property, and the new owner inherits both the energy savings and any remaining warranty coverage.

Under Kerala's new KSERC 2025 regulations, larger solar systems may fall under net billing rather than traditional net metering. With net metering, exported units are credited at full tariff rate against your bill. With net billing, exported energy is valued at a feed-in tariff — 1.5x the standard tariff during peak hours — and credited against your total bill. For most homes with systems up to 3 kW, traditional net metering continues to apply. For larger systems, our team will explain which arrangement applies to your installation and what it means for your savings.

Most standard 2–3 kW homes on traditional net metering do not require batteries. Under KSERC's 2025 regulations (billing from January 2026), larger residential systems may need battery backup to qualify for certain net metering arrangements — for example, systems above 5 kW seeking feasibility after April 2027 face storage requirements in the regulatory framework. Batteries also make sense if you want backup during power cuts (hybrid systems) or to maximise benefits under net billing for bigger arrays. Our team sizes your system and explains whether storage is optional, recommended, or required for your consumption and approval path.

The process involves registering on the national portal at pmsuryaghar.gov.in using your KSEB consumer number and Aadhaar-linked mobile number, selecting an empanelled vendor, getting the system installed after receiving Technical Feasibility (TFR) approval, and then having the subsidy credited to your bank account. As a Rayenna customer, we handle the entire application process on your behalf — you don't have to navigate the portal alone.

You will need your Aadhaar card, recent KSEB electricity bill, proof of property ownership (or rental agreement), bank account details, and a passport-size photograph. Our team will help you compile and submit all documentation correctly.

From your initial consultation to a fully commissioned system, the typical timeline in Kerala is 4–8 weeks. The physical installation itself takes just 1–2 days. The rest of the time accounts for site survey, system design, KSEB feasibility approval, and net meter installation. Under current KSERC rules, KSEB should confirm technical feasibility within 15 days, with full approval pathways targeting up to 135 days — though busy periods and incomplete documents can extend waits. We keep you informed at every step.

No. The PM Surya Ghar subsidy is available only to consumers who have not previously availed a government solar subsidy. If you installed a system under an older scheme such as KSEB Soura or ANERT's Surya Thejus, you are not eligible to claim the current subsidy.

Yes — the KSEB ekiran portal (ekiran.kseb.in) is the official online platform for all solar rooftop applications in Kerala. This is where you register your system, submit documents, track application status, and apply for net metering. As a Rayenna customer, our team handles all ekiran portal submissions on your behalf — you do not need to navigate it yourself.

Before KSEB installs your bi-directional net meter, your solar system must be inspected and certified by a licensed Electrical Inspector (EI). This certificate confirms your installation meets all safety and technical standards. KSEB will not proceed with net metering activation without it. Rayenna coordinates the Electrical Inspector's visit as part of our end-to-end installation service — this is not something you need to arrange separately.

You initiate the application yourself on pmsuryaghar.gov.in using your KSEB consumer number and Aadhaar-linked mobile. However, the system must be installed by an MNRE-empanelled vendor, and many of the subsequent steps — KSEB feasibility approval, net meter application, subsidy disbursement documentation — require coordination between you, the installer, and KSEB. As a Rayenna customer, we manage the entire process on your behalf from registration to subsidy credit.

Very little. Solar panels are designed to be low-maintenance. We recommend a basic visual inspection every few months and a professional system check once a year. Occasional cleaning — particularly after heavy dust or leaf accumulation — can improve output by up to 15%. Kerala's monsoon rains naturally clean the panels during the rainy season.

A complete Rayenna installation includes a 25-year performance warranty on solar panels (guaranteed to maintain at least 85% of initial output), a 5–10 year warranty on the inverter, and a 5-year workmanship warranty on the installation itself. All warranty terms are documented clearly in your agreement.

Given Kerala's heavy monsoon lightning activity, lightning arresters are strongly recommended and are a sensible safeguard for your solar investment. They protect your inverter, panels, and any battery storage from surge damage. Rayenna ensures all installations comply with Indian safety codes in this regard.

Solar panels degrade slowly over time. After 25 years, most quality panels still operate at 80–85% of their original output. At that point, you can choose to replace individual underperforming panels or upgrade to newer, higher-efficiency technology. The inverter will likely need replacement sooner — typically after 10–12 years.

First, check your inverter's display or monitoring app for any error codes. A sudden drop in output can be caused by shading (a new obstruction like a tree branch), a tripped circuit breaker, an inverter fault, or a loose connection. If the issue is not immediately obvious from the monitoring system, contact your installer. As a Rayenna customer, our support team is reachable directly and will diagnose the issue remotely or arrange a site visit.

In most of Kerala, the monsoon rains (June–September) effectively clean your panels naturally. Outside monsoon season, a light rinse with water every 4–6 weeks using a soft brush or hose is sufficient to remove dust and bird droppings. Avoid harsh detergents and abrasive materials. Do not clean panels in the middle of the day when they are hot — early morning is ideal. A professional annual service check by Rayenna includes cleaning as part of the inspection.

Standard home insurance policies in India do not automatically cover solar panels. You should inform your insurer about the installation and request an endorsement to include the solar system under your existing policy, or take out a separate equipment protection policy. The additional premium is typically modest and well worth the coverage against theft, fire, or storm damage. Our team can advise you on what to discuss with your insurer.

Yes. Individual flat owners with dedicated roof access can install as today. Housing societies can also explore shared rooftop systems — KSERC's 2025 regulations now recognise Virtual Net Metering (VNM), allowing one common solar plant to allocate credits across multiple flat meters with a society agreement. Implementation is still maturing in Kerala, so early societies should start with a feasibility study and clear benefit-sharing rules. Contact us for a building-specific assessment.

The PM Surya Ghar subsidy is specifically for residential consumers. However, commercial and industrial solar installations can still benefit from accelerated depreciation benefits and KSEB's commercial net metering policy, which significantly improves the financial case. Our team can walk you through the commercial options.

KSERC's Renewable Energy Regulations, 2025 apply from November 2025, with the new billing system from January 1, 2026. Key points for homes: domestic net metering is available up to 20 kW; systems up to 10 kW are exempt from grid support charges; above 10 kW, grid support charges apply on banked energy during non-solar hours; net billing and gross metering options exist for larger consumers; existing systems with prior feasibility can be grandfathered. Systems above 5 kW may need battery storage for certain approvals after April 2027. Rayenna designs every installation to current rules so your savings and subsidy stay protected.

Virtual Net Metering lets one shared rooftop solar system supply multiple KSEB consumer numbers — typical for housing societies. Solar generation from a common roof is allocated among participating flats according to an agreed formula, instead of each flat needing its own separate installation. KSERC's 2025 regulations formally enable VNM alongside traditional net metering. Societies still need a resolution, legal agreement on credit sharing, KSEB approval, and an installer experienced in multi-meter projects. Rayenna advises societies on compliant designs from common-area pilots to full VNM layouts.

The construction stage is the ideal time to plan your solar installation. You can orient the roof for optimal south-facing solar generation, incorporate conduit routing during construction (saving cost later), and potentially integrate solar into your electrical design from the start. Talk to us before your roof is completed — the savings from early planning can be significant.

The subsidy and net metering agreement require property ownership. However, with your landlord's written consent, a solar system can be installed on a rental property — ownership of the system and any subsidy would typically belong to the property owner. Some landlords are increasingly open to solar because it increases property value. If you are a tenant interested in solar, speak to your landlord about a shared arrangement.

India added a record volume of rooftop solar in early 2026, driven by PM Surya Ghar. Higher application volumes mean DISCOMs and KSEB teams handle more feasibility checks, meter upgrades, and inspections. Regulators have set improved targets — feasibility confirmation within 15 days and full approvals within 135 days — but real-world timelines still depend on documentation quality, Electrical Inspector scheduling, and local grid capacity. Choosing an MNRE-approved installer who files ekiran and KSEB paperwork correctly is the best way to avoid unnecessary delays. Rayenna tracks every approval stage on your behalf.