State Solar Viability Matrix 2026: Subsidies & Tariffs

Table 1: 2026 National Rooftop Solar State Economics & Policy Benchmark Matrix
State / UT	Central CFA (3kW)	State Top-Up	Top Grid Tariff	Net Metering Model	Payback Horizon	State Hub
Maharashtra	₹78,000	None (CFA only)	₹14.80 / unit	1:1 Net Metering (Banking Charges apply)	3.4 Years	Maharashtra Guide →
Uttar Pradesh	₹78,000	₹30,000 (State Top-Up)	₹7.50 / unit	Gross / Net Metering (Annual settlement)	3.6 Years	Uttar Pradesh Guide →
Gujarat	₹78,000	High feed-in tariff	₹8.20 / unit	Surya Gujarat Net-Billing (₹2.25/unit buyback)	3.9 Years	Gujarat Guide →
Delhi (NCT)	₹78,000	₹3.00/unit GBI Incentive	₹8.00 / unit	Solar Policy 2024–2027 Virtual Net Metering	3.2 Years	Delhi Guide →
Karnataka	₹78,000	KREDL CFA	₹8.50 / unit	KERC Gross / Net Metering (Quarterly True-up)	4.1 Years	Karnataka Guide →
Rajasthan	₹78,000	RREC Accelerated Clearance	₹8.10 / unit	RERC Net Metering (Annual settlement in March)	3.5 Years	National State Hub →
Tamil Nadu	₹78,000	TANGEDCO Network Support	₹9.20 / unit	TNERC Net Feed-in Scheme (ToD settlement)	4.2 Years	National State Hub →
Telangana	₹78,000	TSREDCO Single Window	₹9.50 / unit	TSSPDCL / TSNPDCL Net Metering	3.8 Years	National State Hub →
Kerala	₹78,000	Soura Scheme Subsidy	₹8.80 / unit	KSEB Net Metering (Banking with settlement)	4.3 Years	National State Hub →
Punjab	₹78,000	PEDA Solar Assistance	₹8.40 / unit	PSPCL Net Metering (Quarterly adjustment)	4.0 Years	National State Hub →

State Rooftop Solar Viability Analysis: Core Financial & Regulatory Drivers

The financial feasibility of a residential rooftop solar system in India is determined by a combination of state-specific factors rather than equipment cost alone. Because the Ministry of New and Renewable Energy (MNRE) standardized the Central Financial Assistance (CFA) at ₹30,000 per kW up to 2 kW, plus ₹18,000 for the 3rd kW (reaching a maximum central grant of ₹78,000), hardware costs are largely uniform across India. However, the true economic return on investment (ROI) fluctuates significantly across state borders based on retail tariff structures, state top-up subsidies, and local DISCOM net metering settlement terms.

1. Retail Electricity Slab Pricing & Fuel Surcharges

The highest residential slab tariff charged by your local electricity distribution company (DISCOM) is the single most decisive variable determining your solar payback timeline. For example, in Maharashtra, where MSEDCL charges peak residential tier tariffs surpassing ₹14.80 per unit (including wheeling charges and regulatory assets surcharges), a 3 kW solar array saves a household over ₹4,200 per month. Consequently, Maharashtra homeowners achieve capital break-even in just 3.4 years despite having no additional state government subsidy.

Conversely, in states with heavily subsidized base electricity tariffs like Punjab or Delhi (where consumers using under 200–400 units receive free or deeply subsidized power), rooftop solar economics depend on higher consumption brackets where power consumption exceeds subsidized tiers.

2. State Top-Up Grants & Generation-Based Incentives

Certain forward-looking states offer supplemental grants that stack on top of the Central ₹78,000 grant:

Uttar Pradesh: The UPNEDA Solar Energy Policy provides an additional ₹15,000 per kW (up to ₹30,000 maximum), slashing the net capital outlay for a 3 kW system to approximately ₹60,000–₹65,000.
Delhi (NCT): Under the Delhi Solar Policy 2024–2027, the Delhi government offers a Generation-Based Incentive (GBI) of ₹3.00 per unit for residential solar generation for a 5-year duration, credited directly to electricity bills.
Gujarat: While state capital grants are phased out in favor of the central DBT, Gujarat boasts the most streamlined automated vendor clearance and bidirectional smart metering framework via the Surya Gujarat portal.

3. Net Metering vs. Net Billing Regulatory Frameworks

How your DISCOM credits surplus energy fed back into the grid heavily dictates your financial yield:

1:1 Net Metering: Exported units are subtracted directly from imported units on a 1-to-1 kilowatt-hour basis. If you export 300 units and consume 350 units, you only pay for 50 units at the applicable slab rate.
Gross Metering / Net Billing: Electricity consumed is billed at retail rates (e.g. ₹8.00/unit), while exported solar electricity is credited at the DISCOM's Average Power Purchase Cost (APPC), typically between ₹2.25 and ₹3.15 per unit. Consumers under net billing must optimize self-consumption during daytime peak generation hours.

Frequently Asked Questions on State Solar Comparisons

Why does the payback period vary from 3.2 to 4.3 years across states?

Payback varies primarily due to the local retail electricity tariff. In states with high retail tariffs (like Maharashtra at ₹14.80/kWh), every unit of solar generated saves significantly more money each month than in states with lower base tariffs (like Kerala at ₹8.80/kWh), resulting in a faster recovery of the upfront investment.

Can I claim both the Central PM Surya Ghar subsidy and a state subsidy?

Yes, in states that offer dedicated top-up subsidies (such as Uttar Pradesh's ₹30,000 state grant or Delhi's Generation-Based Incentive), homeowners are legally entitled to stack the state benefit directly on top of the Central ₹78,000 CFA grant.

What happens to excess electricity credits at the end of the financial year?

Most State Electricity Regulatory Commissions (SERCs) mandate an annual true-up (typically in March or September). Depending on the state regulations, unadjusted surplus units are either settled by the DISCOM at the Average Power Purchase Cost (APPC) via direct credit to your utility bill, or forfeited if surplus limits are exceeded.