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. GST on solar modules was cut from 12% to 5% in September 2025, lowering system costs.

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 PM Surya Ghar subsidy applies only with empanelled installers, and we handle it end to end. Consumers apply on the national portal (pmsuryaghar.gov.in) and must use an empanelled vendor. Rayenna Energy is a PM Surya Ghar empanelled vendor (MNRE), so we can complete the filing and installation pathway with you.

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 available under current scheme guidelines (check pmsuryaghar.gov.in for the latest status), the GST cut on solar modules from 12% to 5% in September 2025, and Kerala's rising KSEB tariffs, now remains 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 cells and modules attract 5% GST (cut from 12% effective 22 September 2025), which lowers typical system costs. The tax on a final invoice still depends on how the invoice is structured (equipment versus installation services). 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. List-I covers approved solar modules (panels); List-II covers approved solar cells used inside those modules. For PM Surya Ghar subsidy and most new grid-connected rooftop systems, your quote should use ALMM List-I modules — and, unless a limited exemption applies, cells that meet List-II rules. Before signing, confirm brand and model on the quotation match what gets installed. Non-compliant hardware is a common reason for subsidy rejection or commissioning delay. Rayenna uses PM Surya Ghar empanelled, subsidy-eligible kits and verifies compliance on every project.

PM Surya Ghar residential CFA remains available under current scheme guidelines — check pmsuryaghar.gov.in for the latest status. Kerala already has well over three lakh homes installed and roughly 1,282 MW of rooftop capacity under scheme pathways — plus a large application backlog. Subsidy CFA up to ₹78,000 remains available with registered installers while the scheme continues. Waiting for “next year” risks longer queues, stricter ALMM cell rules, and possible CFA revisions. Locking in a survey and paperwork now is usually smarter than hoping the offer stays identical.

Yes — many Kerala households already do. Many Kerala homes with right-sized solar record near-zero electricity bills when systems are sized to real usage and net metering is set up correctly. Zero bill does not mean off-grid: you stay connected to KSEB, export surplus during the day, and draw back at night. Evening AC, late-night induction, and poor roof design can still leave a residual charge. The path to near-zero is matching system size to 12 months of KSEB units, maximising daytime self-use, and choosing a PM Surya Ghar empanelled installer like Rayenna who handles net-metering paperwork properly.

List-II is MNRE's approved list for solar PV cells (the building blocks inside modules). From mid-2026, many net-metering projects were expected to use List-II cells as well as List-I modules. MNRE has issued limited, time-bound exemptions for certain net-metering / open-access cases and for PM Surya Ghar consumers who formally “Give It Up” the central subsidy (applications via the national portal — check current scheme status). Most families claiming ₹78,000 CFA should still plan for compliant ALMM modules and ask their installer how cell sourcing is handled before deposit. Rayenna explains List-I vs List-II on every subsidy-bound quote so there are no mid-project surprises.

“Give It Up” lets a residential consumer voluntarily forgo Central Financial Assistance under PM Surya Ghar so CFA budget can reach more homes. You still apply through the national portal and follow scheme process, but you do not receive the CFA credit. MNRE has clarified limited ALMM List-II (cell) relief for Give It Up net-metering consumers under current scheme guidance (check pmsuryaghar.gov.in for status). For most Kerala households, claiming the ₹78,000 subsidy is still the better money decision — Give It Up mainly suits buyers who deliberately waive CFA for supply or compliance reasons. Ask Rayenna to model both paths against your bill before you choose.

No. State megawatts prove the market works; they do not shrink your KSEB bill. Kerala has about 3.37 lakh homes installed and more applications than completed installs — so queues and vendor quality matter more than waiting for “cheaper later.” Post-monsoon roofs dry faster for surveys, CFA remains available in the current window, and ALMM / net-metering rules are clearer when your installer finishes promptly. The families joining Kerala's zero-bill stats now are the ones who size honestly and commission — not the ones watching MW headlines.

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.

Yes. RCC (concrete) flat terraces are among the best options in Kerala — installers use ballasted frames or penetrative mounts with proper waterproofing. Raised structures are common and allow airflow underneath. Metal or GI sheet roofs use clamps fixed to purlins; thin or rusted sheets may need reinforcement or a raised frame. Clay and concrete tile roofs use hook-and-rail systems. Water tanks, parapet walls, and shade from trees matter more than roof material — our free site survey maps usable area and the right mount for your specific roof before you commit.

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.

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.

Solar produces power during daylight hours, but Kerala's peak demand is between about 6 pm and 11 pm — when panels are not generating. A standard on-grid system also shuts down during outages for safety. So rooftop solar cuts your bill dramatically but does not automatically end evening load shedding unless you shift heavy loads to daytime, add battery storage, or wait for grid-scale storage projects now being built. Maximising daytime use (washing machine, pump, induction lunch) gives you the best value. If evening AC and load shedding are both concerns, talk to our team about hybrid or battery options.

Yes — and it is one of the smartest combinations for Kerala kitchens in 2026 if you cook mainly during solar hours (roughly 9 am–4 pm). A 1.5–2 kW induction cooktop is a real electrical load, so tell your installer when sizing the system. Many families use induction for daytime boiling and lunch while keeping LPG for open-flame dishes — cutting cylinder cost without spiking the KSEB bill. Cooking only after 6 pm draws from the grid or banked units, which is less valuable under 2026 banking rules. A well-designed 3 kW system often covers induction plus baseload; homes adding induction and multiple ACs may need 4–5 kW.

Yes. A typical Kerala commute adds roughly 8–15 kWh per day, often equivalent to running an extra AC — but many owners charge after 6 pm when panels are idle. Best value comes from daytime charging between 9 am and 4 pm, or adding 1.5–3 kW of extra solar capacity beyond household load. Under KSERC's 2026 rules, exporting solar by day and reclaiming fully at peak evening is increasingly limited, so EV owners should plan charger timing, system size, and possibly battery storage with their installer. Our solar calculator includes an EV section, and Rayenna sizes every quote around your actual mileage and charging habits.

Time-of-day pricing means electricity may cost more during evening peak hours (typically 6 pm–11 pm) and less during off-peak or daytime periods. KSERC has asked KSEB to study ToD tariffs for domestic consumers, and 2025 regulations already cap how much daytime solar export can be drawn back during peak hours — often around 75% for households above 2 kW. Solar economics remain strong, but the highest-value unit is the one you use while your panels are producing. Shift washers, pumps, and dishwashers to daylight; consider storage if EV or AC load peaks at night. Rayenna models daytime vs evening usage before sizing so your system stays profitable as rules evolve.

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 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.

In 2026 MNRE temporarily barred dozens of vendors nationwide from taking new PM Surya Ghar applications after installation backlogs. Treat that as a consumer-protection signal: a low quote is not safe if the partner cannot show MNRE / portal status, ALMM module models on the quotation, a written survey-to-commissioning timeline, and who owns ekiran paperwork. Ask for recent Kerala rooftops near your district and a phone number that still answers after switch-on. Rayenna is a PM Surya Ghar empanelled vendor (MNRE) that designs, installs, and commissions — not just books portal slots.

PM Surya Ghar residential CFA remains available under current scheme guidelines — check pmsuryaghar.gov.in for the latest status. Limited clarifications such as Give It Up / ALMM List-II relief may apply for specific portal applicants — confirm current guidance. CFA rates, ALMM cell rules, and DISCOM queues can still change. If you plan to claim up to ₹78,000, start the survey and national-portal steps with an empanelled installer who can finish installation and commissioning under current rules. Rayenna maps your timeline at the first site visit.

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 or terrace access can install where the society permits it. Housing societies can also explore a common-area plant or shared (virtual) net metering — KSERC's 2025 regulations 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 we begin with a free feasibility study. See our Apartments & Housing Societies page for the three routes and how to request a study.

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, a credit-sharing agreement and KSEB approval. Implementation is still maturing in Kerala. We assess suitability in a free feasibility study — see our Apartments & Housing Societies page.

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 a PM Surya Ghar empanelled installer who files ekiran and KSEB paperwork correctly is the best way to avoid unnecessary delays. Rayenna tracks every approval stage on your behalf.

Often yes for surveys and mounting. After the heaviest rains, roofs dry faster, leak checks are clearer, and crews can work with fewer weather delays — while PM Surya Ghar CFA and ALMM rules for your project are still in the current window. Generation still works in monsoon (clouds reduce output, rain helps clean panels), so waiting only for “perfect sun” is unnecessary. Book a free Rayenna survey when your roof is accessible; we schedule install once clearances land.