Kerala is a distinctive solar market in India. The state receives lower solar irradiance than most of the country due to its geography, heavy monsoon, and consistent cloud cover during long periods of the year. Yet Kerala also has among the highest domestic electricity tariffs in India for upper consumption households, and KSEB (Kerala State Electricity Board) has established one of the more consumer-friendly net metering frameworks nationally. For Kerala homeowners, the economics of solar require more careful analysis than in sunnier states, but the opportunity is real for the right consumption profile.

What subsidies are available in Kerala in 2026?

Central government subsidy under PM Surya Ghar Muft Bijli Yojana

System size	Central subsidy
Up to 2 kW	Rs 30,000 per kW (up to Rs 60,000)
2 kW to 3 kW	Rs 78,000 total
Above 3 kW	Capped at Rs 78,000

ANERT and state-level support

ANERT (Agency for Non-conventional Energy and Rural Technology) is Kerala’s state nodal agency for renewable energy. ANERT has run state-level solar schemes in the past and maintains a list of empanelled vendors. Verify the current status of any active 2026 state scheme at anert.gov.in.

KSEB itself has been supportive of rooftop solar through its net metering framework and has a dedicated solar team for processing applications.

Note: Always confirm current state scheme details at anert.gov.in before signing any installer agreement.

Kerala’s single DISCOM: KSEB

Unlike most large Indian states with multiple DISCOMs, Kerala has a single electricity utility, KSEB (Kerala State Electricity Board), serving the entire state. This simplifies the application process: all Kerala consumers apply through KSEB regardless of their district.

KSEB also operates Kerala’s largest renewable energy development programme. The board has been proactive about integrating rooftop solar into its grid and has established relatively clear guidelines for residential consumers.

Solar irradiance in Kerala: realistic expectations

Kerala receives average solar irradiance of 4.2 to 5.0 kWh per square metre per day, among the lower values in India for a state with significant urban residential consumption. The southwest monsoon runs from June to September with very heavy rainfall and extended cloud cover. The northeast monsoon affects north Kerala in October and November.

This means Kerala has approximately 6 to 7 months of good solar generation and 4 to 5 months of significantly reduced generation.

A 3 kW system in Thiruvananthapuram or Kochi typically generates 280 to 340 units per month in good months (November to April) and as low as 100 to 180 units during peak monsoon months. Annual generation of approximately 3,200 to 3,800 units is realistic for a well-installed system meaningfully lower than the same system would generate in Rajasthan or Gujarat.

Why solar still makes sense in Kerala

Despite lower generation, Kerala’s solar economics are supported by two factors.

KSEB’s tiered tariff for higher consumption. KSEB’s domestic tariff for households consuming above 250 to 300 units per month is significant, and the highest slabs carry meaningful per-unit cost. Each unit of solar power generated and self-consumed saves you the retail tariff rate, which in Kerala’s upper slabs is material.

KSEB’s net metering framework. KSEB has one of the more consumer-friendly annual settlement mechanisms. Surplus credits accumulate across the year, meaning your excellent February and March generation offsets the poor August generation, with annual settlement in your favour if your total annual generation exceeds annual consumption.

Who is eligible?

To claim the PM Surya Ghar central subsidy in Kerala:

• You must own a residential property with an active domestic electricity connection from KSEB
• Installation must be by a vendor registered on the PM Surya Ghar national portal
• Feasibility approval must be obtained before installation
• The property must not have previously received a central rooftop solar subsidy

ANERT also empanels solar vendors in Kerala. For any active ANERT state scheme, eligibility criteria are specified on anert.gov.in.

How net metering works in Kerala

Net metering in Kerala is governed by the Kerala State Electricity Regulatory Commission (KSERC). KSEB implements net metering under KSERC’s framework.

Kerala’s net metering policy allows residential consumers to export surplus solar generation to the KSEB grid, with credits carried forward month to month. At annual settlement, any remaining export surplus is compensated by KSEB.

KSEB has been among the more consistent DISCOMs in processing net meter applications. Urban Kerala typically sees net meter installation within 4 to 8 weeks. Rural connections may take longer.

How to apply: step-by-step

Step 1: Register on the PM Surya Ghar portal

Go to pmsuryaghar.gov.in. Register with your mobile number and KSEB consumer number from your bill. Select Kerala and KSEB as your DISCOM.

Step 2: Apply for feasibility approval

Submit your rooftop solar application. KSEB reviews and confirms suitability. This takes 7 to 15 working days in most urban Kerala areas.

Step 3: Select a registered installer

Kerala has a developing registered installer market. Thiruvananthapuram, Kochi, and Kozhikode have the strongest installer presence. In smaller towns and rural areas, the registered vendor list may be more limited. ANERT’s empanelled vendor list is worth consulting alongside the PM Surya Ghar portal list.

Step 4: Net meter installation

After installation, apply for net meter replacement. KSEB processes these applications. Follow up after 4 weeks if no technician has visited.

Step 5: Commissioning certificate and subsidy

Upload the certificate and bank details to the portal. Subsidy typically reaches your account within 30 to 60 days.

What does solar cost in Kerala after subsidy?

A fully installed 3 kW system in Kerala costs approximately Rs 1.5 lakh to Rs 2 lakh before subsidy. After Rs 78,000 central subsidy, net cost is Rs 72,000 to Rs 1.22 lakh.

With annual generation of approximately 3,200 to 3,800 units and KSEB tariffs for upper slab consumers, annual savings of Rs 22,000 to Rs 32,000 are realistic for a medium-to-high consumption household. This implies a payback period of 4 to 6 years after subsidy.

System sizing for Kerala households

Given Kerala’s lower irradiance, a slightly different sizing approach applies.

Monthly consumption	Recommended size	Notes
Below 150 units	1 kW	Solar economics weaker at this consumption
150 to 300 units	1.5 to 2 kW	Subsidy maximised at 2 kW if budget allows
300 to 500 units	2 to 3 kW	3 kW gives maximum subsidy at Rs 78,000
Above 500 units	3 to 5 kW	Strong case for larger system in upper tariff

Common questions from Kerala homeowners

Does the heavy monsoon damage solar panels?
Quality solar panels are rated to withstand heavy rain, wind, and humidity. They carry IP67 or IP68 ratings for water ingress protection. Kerala’s monsoon is within normal operating parameters for Tier 1 panels from reputed brands. Proper waterproofing around mounting points is important use an installer with experience in Kerala’s climate.

What about coastal areas with salt air?
For properties within 2 to 3 km of the coast, salt air corrosion is a real concern. Specify aluminium mounting structures (more corrosion-resistant than GI steel) and marine-grade hardware. Some panel brands offer coastal-grade frames. Ask your installer specifically about coastal installation practices.

Is solar worthwhile for Kerala homes on lower tariff slabs?
For households consuming below 150 units per month on Kerala’s lower tariff slabs, the economics are weak. Lower irradiance plus lower tariff savings gives very long payback periods. Solar is most justified for households consuming 300 or more units monthly and paying upper KSEB tariff rates.

Summing up

Kerala requires honest assessment before going solar. Lower irradiance than most of India means generation is meaningfully less. But for households with significant consumption in KSEB’s upper tariff slabs, the combination of central subsidy and KSEB’s reasonable net metering framework still delivers a workable investment over a 25-year horizon.

Start at pmsuryaghar.gov.in, register with your KSEB consumer number, and get feasibility approval before approaching any installer.