India · Regulatory guide
Top Solar Proposal Software in Tamil Nadu | SolvSolar
Rooftop solar in Tamil Nadu is distributed by TANGEDCO, regulated by Tamil Nadu Electricity Regulatory Commission (TNERC), averages 5.6 kWh/m²/day of usable irradiance, and is eligible for the central PM Surya Ghar Muft Bijli Yojana scheme — SolvSolar applies those defaults automatically to every 45-second proposal.
DISCOMs covered
TANGEDCO
Metering policy
Net feed-in / net billing under TNERC 2021
Avg. irradiance
5.6 kWh/m²/day
Benchmark cost
₹55,000 / kW
What is different about selling solar in Tamil Nadu
Tamil Nadu is the most important exception in India's net-metering landscape: TNERC's 2021 regulations shifted export compensation away from the simple 1:1 credit most states still use, so a proposal that assumes full retail-rate offset for exported units will overstate savings for the affected categories. That makes self-consumption sizing — matching array output to daytime load rather than to annual consumption — the central design skill here. Coimbatore and Tiruppur's textile and pump-manufacturing clusters are a strong C&I market with high daytime load, which suits net billing far better than a residential home that exports all day and imports all evening.
Nodal agency
Tamil Nadu Energy Development Agency (TEDA)
Main demand centres
Chennai · Coimbatore · Madurai · Tiruchirappalli · Salem
Tamil Nadu net-metering capacity rule
TANGEDCO is the sole distribution utility and, unlike most states, TNERC's 2021 framework moved rooftop consumers toward net feed-in and net billing rather than pure 1:1 net metering — the settlement mechanism materially affects payback and must be confirmed per consumer category.
Net metering in Tamil Nadu
Regulator: Tamil Nadu Electricity Regulatory Commission (TNERC)
Needs verification
Rooftop solar in this state is connected under the state electricity regulatory commission's net-metering regulations: the installer files an application with the local DISCOM, the DISCOM sanctions feasibility against the consumer's sanctioned load, the plant is installed by an empanelled vendor, and a bi-directional meter is installed after inspection before commissioning and credit settlement begin. Exact load caps, capacity ceilings, settlement period and fee schedule must be confirmed against the current DISCOM circular before quoting.
PM Surya Ghar subsidy in Tamil Nadu
Needs verification
PM Surya Ghar: Muft Bijli Yojana is a central (all-India) scheme, so residential consumers in this state are eligible on the same national basis, applying through the National Portal and a state-empanelled vendor, with the subsidy released to the consumer's bank account after installation and DISCOM inspection. Current slab amounts, any additional state top-up, and the state nodal-agency workflow must be verified before being shown to a customer.
Applications in Tamil Nadu route through Tamil Nadu Energy Development Agency (TEDA). The exact slab maths — ₹30,000/kW for the first 2 kW, ₹18,000/kW for the third, capped at ₹78,000 — is worked through in our PM Surya Ghar subsidy guide.
Related reading for Tamil Nadu
Compare Tamil Nadu's rules against every other state in the DISCOM-wise net metering guide, size the system against ROI benchmarks by system size, confirm module eligibility in the ALMM compliance guide, and see how the software costs stack up against Arka360 or Aurora Solar. Common questions are answered in the solar encyclopedia.
Start a Tamil Nadu proposal
Indicative benchmark pricing at ₹55,000 / kW — your own costing, BOM and PM Surya Ghar Muft Bijli Yojana treatment are applied inside the proposal engine.
3 kW rooftop
₹1,65,000
Est. annual yield 4,599 kWh
5 kW rooftop
₹2,75,000
Est. annual yield 7,665 kWh
10 kW rooftop
₹5,50,000
Est. annual yield 15,330 kWh