SRIS Solar

What Is SRIS Solar?

SRIS (Solar Rooftop and Independent Systems) refers to the framework established by India’s Ministry of New and Renewable Energy (MNRE) for promoting distributed rooftop solar installations and off-grid standalone solar systems across the country. The acronym appears in MNRE notifications, state government scheme documents, and State Electricity Regulatory Commission (SERC) tariff orders as an umbrella concept for decentralised solar deployment.

The SRIS framework encompassed multiple consumer segments and system configurations. Residential rooftop solar targeted individual homeowners with grid-connected systems ranging from 1-10 kW. Commercial and industrial rooftop addressed factories, offices, shopping complexes, and warehouses with systems from 50 kW to several megawatts. Institutional rooftop covered schools, colleges, hospitals, and government buildings. Government building solar mandated solar installations on central and state government premises. Independent systems referred to off-grid standalone installations for remote unelectrified areas, including solar home lighting systems, street lights, and micro-grids.

The framework operated through a combination of capital subsidies, soft loans, net metering regulations, and vendor empanelment. State Nodal Agencies (SNAs) like GEDA (Gujarat), MEDA (Maharashtra), KREDL (Karnataka), and TEDA (Tamil Nadu) implemented central guidelines at the state level, adapting them to local conditions and DISCOM structures.

By 2024, the SRIS conceptual framework had evolved into more specific operational programmes. PM Surya Ghar Muft Bijli Yojana became the dedicated residential rooftop scheme, while the Phase-II Grid-Connected Rooftop Solar Programme continued serving commercial and institutional segments. For current applicants, understanding SRIS provides historical context, but the active programmes are what matter for subsidy access and installation procedures.

Why SRIS Solar Matters

Understanding the SRIS framework and its successors delivers practical benefits for anyone considering rooftop solar in India.

Subsidy Access: India’s rooftop solar subsidies have disbursed thousands of crores since 2010. PM Surya Ghar alone allocated Rs 75,000 crore for 1 crore installations. Missing available subsidies due to procedural ignorance costs residential customers Rs 30,000-78,000 per installation. Understanding the scheme evolution ensures applicants access the correct current programme.

Regulatory Navigation: India’s solar policy operates across central (MNRE), state (SNA, SERC), and local (DISCOM) levels. SRIS and its successors create the regulatory architecture governing net metering, grid connectivity, safety standards, and subsidy disbursement. Comprehending this structure prevents application rejections and project delays.

Vendor Selection: MNRE empanelment requirements evolved through SRIS phases into today’s stringent standards. Empanelled vendors must use ALMM-listed modules, certified inverters, and comply with BIS and CEA regulations. Understanding these requirements helps customers verify vendor legitimacy and protect their investments.

Technology Quality Assurance: The SRIS framework’s emphasis on ALMM-listed modules and certified components protects consumers from substandard equipment. Counterfeit and low-quality modules entering through unauthorised channels fail prematurely, voiding warranties and eliminating expected savings.

Grid Stability: Distributed rooftop solar reduces transmission losses, defers distribution infrastructure upgrades, and lowers peak demand. SRIS and its successors strategically position rooftop solar as a grid benefit, not just a consumer savings mechanism. This perspective influences policy design and subsidy allocation.

Employment Generation: India’s solar sector employs over 5 lakh workers, with rooftop installation representing a significant segment. The SRIS framework’s vendor empanelment, training requirements, and quality standards create skilled employment across installation, maintenance, and project development.

How SRIS Solar Works

Historical Framework Evolution

Phase-I (2010-2015): Initial rooftop solar pilots through state nodal agencies. Limited budget (Rs 434 crore) and modest targets. Subsidy up to 30% of system cost. Primarily residential and institutional focus. Low awareness and limited vendor ecosystem.

Phase-II Grid-Connected Rooftop (2015-2024): Expanded scope with Rs 11,814 crore allocation. Targeted 40 GW rooftop capacity by 2022 (later extended). Introduced central financial assistance (CFA) for residential, institutional, and government segments. Commercial segment encouraged through net metering without direct subsidy. State-wise targets allocated.

PM Surya Ghar Muft Bijli Yojana (2024-present): Dedicated residential scheme with Rs 75,000 crore outlay. Fixed subsidy structure (Rs 30,000 + Rs 30,000 + Rs 18,000 = Rs 78,000 maximum). National portal (pmsuryaghar.gov.in) for unified application. Target: 1 crore installations by 2027. Simplified vendor empanelment and DISCOM integration.

Current Application Process (PM Surya Ghar)

Step 1: Online Registration: Customer registers at pmsuryaghar.gov.in using mobile number and Aadhaar OTP verification. System captures basic details and electricity connection information.

Step 2: Vendor Selection: Customer selects from MNRE-empanelled vendors in their DISCOM area. Vendors submit technical proposals including system design, module specifications, and cost breakdown.

Step 3: Feasibility Approval: Selected vendor applies to DISCOM for technical feasibility. DISCOM verifies roof structural capacity, transformer loading, and net metering infrastructure availability.

Step 4: Installation: Upon feasibility approval, vendor installs the system using ALMM-listed modules, MNRE-empanelled inverters, and BIS-certified balance of system components.

Step 5: Inspection and Commissioning: DISCOM inspector verifies installation quality, electrical safety, and compliance with CEA regulations. Bidirectional net meter is installed.

Step 6: Subsidy Disbursement: After successful inspection, central subsidy transfers directly to customer’s bank account via DBT within 30-60 days. Customer pays vendor the net amount (total cost minus subsidy).

Commercial/Institutional Process (Phase-II Continuation)

Commercial applications follow state-specific procedures through State Nodal Agencies. No central subsidy for general commercial, but some states offer state-level incentives. Net metering applications proceed through DISCOMs under respective SERC frameworks.

Visual Explanation

Real-World Example

Ahmedabad Residential Installation (PM Surya Ghar, 2025): The Patel family in Bopal, Ahmedabad, applied for a 5 kW rooftop system through pmsuryaghar.gov.in. They selected Heaven Green Energy, an MNRE-empanelled vendor operating across UGVCL territory.

• System cost: Rs 2,75,000 (Rs 55,000/kW)
• Central subsidy: Rs 78,000 (maximum for 3 kW; 4-5 kW receives same amount)
• State subsidy (Gujarat): Rs 10,000 additional through GEDA
• Net cost: Rs 1,87,000
• Monthly generation: 650-700 kWh
• Monthly savings: Rs 5,200-5,600 (at Rs 8/unit average)
• Payback period: 3.2 years
• 25-year savings: Rs 15.6 lakh (undiscounted)

The application process took 45 days from registration to commissioning. DISCOM (UGVCL) approved feasibility in 7 days. Installation completed in 3 days. Inspection and net metering activation took 10 days. Subsidy credited to bank account in 28 days post-commissioning.

Surat Commercial Installation (Phase-II, 2024): A textile processing unit in Pandesara installed a 250 kW rooftop system under Gujarat’s commercial rooftop framework. Without central subsidy, the project relied on accelerated depreciation (40% in Year 1), net metering savings, and GST input credit.

• System cost: Rs 1.12 crore
• First-year accelerated depreciation benefit: Rs 44.8 lakh
• Annual generation: 3,75,000 kWh
• Annual savings: Rs 30 lakh (at Rs 8/unit commercial tariff)
• Payback period: 3.8 years (including depreciation)
• CO2 reduction: 300 tonnes annually

Technical Specifications / Benchmarks

Benefits / Advantages

• Subsidy Reduction: PM Surya Ghar’s fixed subsidy (up to Rs 78,000) reduces residential system costs by 30-50%, making rooftop solar accessible to middle-income households who previously found it unaffordable.

• Simplified Application: The unified national portal eliminates state-specific paperwork variations. One registration, one vendor selection, one tracking system replaces the previous maze of state portals and manual submissions.

• Quality Assurance: ALMM mandate ensures domestically manufactured, quality-tested modules. This protects consumers from counterfeit imports and supports India’s solar manufacturing ecosystem.

• Direct Benefit Transfer: DBT eliminates intermediary corruption and delays. Subsidy transfers directly from government to customer’s bank account, ensuring full benefit reaches the intended recipient.

• Net Metering Framework: Grid-connected rooftop systems export surplus power, generating credits that offset night-time and cloudy-day imports. This virtual storage eliminates battery costs for grid-tied systems.

• Employment Generation: Vendor empanelment creates formal employment for installers, electricians, and project managers. Training requirements under MNRE guidelines upskill the workforce.

• Grid Deferral Benefits: Distributed generation reduces distribution transformer loading and defers infrastructure upgrades. DISCOMs benefit from reduced technical losses and peak demand reduction.

• Carbon Reduction: Each 5 kW residential system avoids approximately 6 tonnes of CO2 annually. At 1 crore installations, PM Surya Ghar targets 60 million tonnes annual CO2 reduction.

• Energy Security: Rooftop solar reduces dependence on coal imports and volatile fossil fuel prices. Domestic solar generation insulates households from electricity tariff hikes.

• Rural Electrification: Off-grid components of SRIS-style frameworks brought solar lighting to thousands of unelectrified villages. Grid extension through rooftop solar complements centralised generation.

Limitations / Drawbacks

• Subsidy Cap at 3 kW: PM Surya Ghar’s maximum Rs 78,000 subsidy applies to systems up to 3 kW. Larger systems (4-10 kW) receive the same amount, reducing per-kW subsidy intensity for bigger homes.

• Commercial Exclusion: No central subsidy for commercial and industrial rooftop, limiting adoption among price-sensitive MSMEs. These segments rely on depreciation and net metering alone.

• DISCOM Resistance: Some DISCOMs delay net metering approvals due to revenue loss concerns. Despite regulatory mandates, bureaucratic inertia and technical capacity constraints slow processing in certain states.

• Vendor Quality Variation: While empanelment ensures minimum standards, vendor quality varies significantly. Poor installation practices, substandard mounting, and inadequate electrical work create safety hazards and performance shortfalls.

• Roof Structural Constraints: Many Indian homes lack roofs capable of supporting solar panel loads (15-20 kg/m²). Structural upgrades add Rs 15,000-50,000 to project costs, partially offsetting subsidy benefits.

• Urban Space Limitations: High-rise apartments and rented accommodations often lack roof rights or adequate space. SRIS and PM Surya Ghar primarily serve independent home owners, excluding a significant urban population.

• Subsidy Disbursement Delays: Despite DBT, some customers experience 60-90 day delays due to documentation issues, inspection backlogs, or bank account verification problems.

• Technology Lock-in: ALMM requirements, while ensuring quality, limit module choice to domestic manufacturers. Customers cannot access certain premium imported technologies even if willing to pay the difference.

Comparison Section

Applications

Residential (1-10 kW): Individual homes, villas, and row houses form PM Surya Ghar’s core target. A typical 3-5 kW system generates 400-700 kWh monthly, reducing electricity bills by 70-90%. Heaven Green Energy has installed 5,000+ residential systems across Gujarat under successive SRIS and PM Surya Ghar frameworks.

Commercial (50 kW-2 MW): Offices, retail stores, hotels, and hospitals use rooftop solar to offset high commercial tariffs (Rs 8-12/unit). While no central subsidy applies, accelerated depreciation and net metering deliver 4-6 year payback periods. Commercial solar represents India’s fastest-growing rooftop segment.

Industrial (100 kW-10 MW+): Manufacturing facilities, warehouses, and processing plants install large rooftop and ground-mount systems. Industrial solar reduces reliance on grid power and diesel backup. Textile, pharmaceutical, and food processing industries lead adoption.

Institutional (10-500 kW): Schools, colleges, hospitals, and government buildings benefit from subsidised installations under various scheme categories. These installations demonstrate solar technology to large audiences and create educational opportunities.

Government Buildings: Central and state government mandates require solar on public buildings. CPSE (Central Public Sector Enterprise) targets and Smart Cities Mission components drive public sector deployment.

Agricultural (PM-KUSUM): While separate from SRIS, PM-KUSUM Component C solarises agricultural pumps. Component B provides standalone solar pumps with up to 60% subsidy. These programmes complement rooftop frameworks in rural areas.

Off-Grid and Remote: Standalone solar home systems, street lighting, and micro-grids serve unelectrified villages. Though declining as grid expansion proceeds, off-grid solar remains essential for remote Himalayan and Northeastern communities.

Industry Standards & Regulations

SRIS and successor programmes operate within a comprehensive regulatory framework spanning multiple authorities and standards.

MNRE Guidelines: The Ministry of New and Renewable Energy issues programme-specific guidelines defining eligibility, subsidy structure, technology requirements, and disbursement procedures. PM Surya Ghar guidelines (February 2024) supersede earlier rooftop programme instructions for residential segments.

CEA Connectivity Regulations 2019: The Central Electricity Authority mandates technical standards for all grid-connected distributed generation. These specify voltage and frequency ranges, protection settings, power quality requirements, and safety interlocks. All rooftop systems must comply regardless of programme or subsidy status.

ALMM (Approved List of Models and Manufacturers): MNRE maintains ALMM for solar modules and inverters. Government-subsidised and public-sector projects must use ALMM-listed equipment, and understanding how the ALMM list affects project BOQs helps vendors avoid procurement delays. The list is updated periodically, with domestic manufacturers dominating entries following import restrictions.

BIS Certification: Bureau of Indian Standards certification is mandatory for solar modules, inverters, cables, and structural components. IS 14286 covers crystalline silicon modules; IS 16221 covers inverters.

SERC Net Metering Regulations: State Electricity Regulatory Commissions define net metering tariffs, banking periods, and settlement mechanisms. Gujarat (GERC), Maharashtra (MERC), Rajasthan (RERC), and other SERCs have issued specific rooftop solar regulations.

State Nodal Agency Procedures: GEDA, MEDA, KREDL, TEDA, and other SNAs implement central guidelines with state-specific adaptations. These include additional documentation, local vendor empanelment, and state subsidy administration.

DISCOM Integration: Distribution companies (UGVCL, MGVCL, PGVCL, DGVCL in Gujarat; MSEDCL in Maharashtra; etc.) handle feasibility approval, inspection, meter installation, and billing integration. DISCOM capacity and willingness significantly impact project timelines.

India-Specific Context

India’s rooftop solar journey reflects unique demographic, geographic, and policy characteristics.

Gujarat Leadership: Gujarat consistently ranks among India’s top rooftop solar states. GEDA (Gujarat Energy Development Agency) pioneered streamlined processes, and the state’s four DISCOMs (UGVCL, MGVCL, PGVCL, DGVCL) developed robust net metering infrastructure. Over 3 lakh residential installations demonstrate Gujarat’s rooftop solar maturity. Heaven Green Energy, headquartered in Ahmedabad, has contributed 5,000+ installations to this total.

Maharashtra Scale: With India’s highest electricity consumption, Maharashtra offers enormous rooftop potential. MEDA manages state-level programmes, while MSEDCL handles net metering. Mumbai’s high tariffs (Rs 12-15/unit for commercial) create compelling economics despite limited subsidies.

Southern States: Tamil Nadu (TEDA), Karnataka (KREDL), Andhra Pradesh, and Telangana have active rooftop programmes. These states combine high solar irradiance (1,800-2,000 kWh/m²/year) with growing industrial demand. However, DISCOM financial stress sometimes delays net metering implementation.

Northern Challenges: Delhi, Haryana, Punjab, and Uttar Pradesh face severe air pollution that reduces solar output by 10-20%. Despite high electricity demand, rooftop adoption lags due to space constraints, rental housing prevalence, and administrative complexity.

Eastern and Northeastern Regions: West Bengal, Odisha, and Northeastern states have lower solar irradiance (1,400-1,700 kWh/m²/year) and limited vendor ecosystems. However, high grid unreliability makes rooftop solar attractive for backup power when combined with batteries.

Urban-Rural Divide: Urban homeowners with independent houses benefit most from PM Surya Ghar. Rural households often lack adequate roof space or grid connections. PM-KUSUM addresses rural agricultural solar needs separately from rooftop frameworks.

Financial Inclusion: PM Surya Ghar offers collateral-free loans up to Rs 3 lakh at subsidised interest rates (6-8%) through nationalised banks. This credit access enables middle-income households to install solar without large upfront payments, expanding the addressable market beyond cash buyers.

Manufacturing Push: ALMM and production-linked incentive (PLI) schemes aim to build 100 GW domestic solar manufacturing capacity. As Indian cell and module production scales, rooftop programme requirements increasingly favour domestic supply, reducing import dependence.

Future Trends

India’s rooftop solar policy continues evolving toward greater ambition, simplification, and integration.

Virtual Net Metering: Group net metering and virtual net metering will enable apartment residents, tenants, and commercial tenants to participate in rooftop solar without owning roof space. Excess generation from a host building can be credited to multiple consumer accounts virtually.

Battery Integration: Falling lithium battery prices (Rs 8,000-12,000/kWh by 2027) will enable standard rooftop systems to include 5-10 kWh storage. This provides backup during outages and enables peak shaving, reducing grid dependence further.

Smart Metering: Advanced metering infrastructure (AMI) rollouts will enable time-of-use net metering, dynamic tariffs, and automated settlement. Real-time generation and consumption data optimise self-consumption and export strategies.

Community Solar: Shared solar gardens on common land or large rooftops will serve multiple subscribers. This model addresses space constraints for apartments and rented properties, expanding rooftop solar access to previously excluded segments.

Green Building Mandates: Increasing numbers of states mandate rooftop solar for new construction above certain sizes. Gujarat, Haryana, and Karnataka already have solar building bylaws. This regulatory push will drive organic rooftop growth independent of subsidies.

Carbon Credit Monetisation: Rooftop solar generation may qualify for carbon credits under voluntary and compliance markets. International Carbon Credit frameworks and India’s Carbon Credit Trading Scheme (CCTS) could add Rs 0.50-1.00/kWh to rooftop economics.

Digital Integration: Blockchain-based peer-to-peer energy trading will enable rooftop prosumers to sell surplus directly to neighbours at negotiated prices, bypassing DISCOM settlement. Pilot projects in Delhi and Bangalore test this concept.

Floating Rooftop Hybrid: Canal-top and reservoir floating solar combined with nearby building rooftop systems create hybrid distributed generation clusters. MNRE’s floating solar guidelines complement rooftop frameworks for water-rich states.

Common Mistakes & Misconceptions

• Confusing SRIS with Current Schemes: Some applicants search for “SRIS application” and miss the active PM Surya Ghar portal. SRIS is historical context; PM Surya Ghar is the current application channel.

• Expecting Commercial Subsidy: Many commercial customers assume PM Surya Ghar subsidies apply to their installations. The scheme is residential-only. Commercial projects must rely on depreciation and net metering savings.

• Selecting Non-Empanelled Vendors: Choosing unempanelled vendors to save 10-15% on upfront costs eliminates subsidy eligibility. The net cost after subsidy from an empanelled vendor is typically lower than the unsubsidised price from an unauthorised installer.

• Ignoring Roof Structural Assessment: Installing panels on structurally inadequate roofs risks collapse, water ingress, and voided insurance. Professional structural assessment is essential before installation.

• Oversizing for Subsidy: Installing exactly 3 kW to maximise per-kW subsidy may not match actual consumption. Undersized systems leave savings on the table; oversized systems without subsidy for excess capacity reduce returns.

• Neglecting Net Metering Formalities: Some customers install systems without completing DISCOM net metering applications. Without bidirectional metering, surplus export is not credited, eliminating 20-40% of potential savings.

• Assuming Subsidy Is Automatic: Subsidy requires complete documentation, proper installation, DISCOM inspection, and DBT registration. Missing any step delays or voids subsidy disbursement.

• Using Non-ALMM Modules: Importing or purchasing non-ALMM modules voids subsidy eligibility and may create warranty enforcement difficulties. Always verify ALMM listing before purchase.

Key Takeaways

• SRIS (Solar Rooftop and Independent Systems) was MNRE’s framework for distributed solar deployment, now evolved into PM Surya Ghar (residential) and Phase-II Grid-Connected Rooftop (commercial/institutional).
• PM Surya Ghar Muft Bijli Yojana (2024-present) is the active residential scheme offering up to Rs 78,000 central subsidy through pmsuryaghar.gov.in.
• All MNRE-supported installations require ALMM-listed modules, MNRE-empanelled inverters, BIS-certified components, and CEA compliance.
• Application process: online registration → vendor selection → DISCOM feasibility → installation → inspection → DBT subsidy disbursement.
• Gujarat leads India’s rooftop adoption with 3 lakh+ installations, streamlined DISCOM processes, and active state-level support through GEDA.
• Commercial rooftop relies on accelerated depreciation, net metering, and GST benefits rather than direct subsidies.
• Understanding scheme evolution from SRIS through Phase-II to PM Surya Ghar helps navigate current procedures and avoid outdated information.
• Quality installation by MNRE-empanelled vendors protects investment, ensures safety, and maintains subsidy eligibility.

Frequently Asked Questions

The FAQs are defined in the frontmatter of this article.

Related Glossary Terms

• PM Surya Ghar Yojana
• PM KUSUM
• DREBP
• MNRE
• State Nodal Agency
• ALMM
• Net Metering
• DISCOM
• Central Financial Assistance
• Accelerated Depreciation

Related Resources

• PM Surya Ghar Complete Guide, Step-by-step guide to India’s flagship residential solar scheme
• PM KUSUM Complete Guide, Agricultural solar schemes complementing rooftop programmes
• Net Metering in India, How grid connectivity works under SRIS and PM Surya Ghar
• Residential Solar Systems, Turnkey rooftop installations with full subsidy handling
• Commercial Solar Systems, C&I rooftop solar under Phase-II framework
• Solar Calculator, Estimate savings and subsidy eligibility for your rooftop system
• Complete Guide to Solar Installation in Gujarat, State-specific SNA procedures and timelines
• Contact Heaven Green Energy, Gujarat’s #1 ranked PM Surya Ghar installer with 5,000+ installations

Sources & References

• MNRE Rooftop Solar Programme Phase-II Guidelines, Ministry of New and Renewable Energy
• PM Surya Ghar Muft Bijli Yojana Guidelines, MNRE, February 2024
• MNRE Annual Report 2024-25, Government of India
• CEA National Electricity Plan 2023, Central Electricity Authority
• State Nodal Agency Guidelines (GEDA, MEDA, KREDL, TEDA, RREC)
• SERC Tariff Orders for Net Metering (Gujarat, Maharashtra, Rajasthan, Karnataka, Tamil Nadu)
• ALMM List, MNRE, Updated 2025-26
• DBT Guidelines for Solar Subsidy Disbursement, Government of India
• GERC Net Metering Regulations, Gujarat Electricity Regulatory Commission
• MERC Net Metering Regulations, Maharashtra Electricity Regulatory Commission

Ready to apply for rooftop solar under PM Surya Ghar? Contact Heaven Green Energy, Gujarat’s #1 ranked PM Suryaghar installer and MNRE-empanelled vendor. We handle everything from portal registration to DISCOM commissioning, ensuring you receive the full Rs 78,000 central subsidy hassle-free.