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Solar Knowledge · Tamil Nadu

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Practical guides on TANGEDCO tariffs, PM Surya Ghar subsidy, net metering, system sizing, and maintenance — written for Tamil Nadu homeowners.

TANGEDCO Tariff

TANGEDCO-ன் Two-Table Slab System எப்படி work ஆகும்? உங்க bill இவ்வளவு ஏன் ஆகுது?

TANGEDCO doesn't have a simple slab system. Once you cross 500 units bi-monthly, your entire bill is recalculated at higher rates — including the first 100 units that were free. This explains why your bill jumps dramatically even when you use just a few extra units.

We break down both tables, show the exact rates, and calculate the real cost at 300, 500, and 700 units bi-monthly so you can see exactly where your bill lands.
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Subsidy
PM Surya Ghar: ₹78,000 எப்படி claim பண்றது?
Step-by-step guide to claiming the central government subsidy. Who qualifies, what documents are needed, and how long disbursement takes.
Apr 2026 · 5 min Read →
System Sizing
உங்க வீட்டிற்கு எத்தனை kWp போதும்?
How to calculate the right system size for your home — based on your actual consumption, roof area, and which TANGEDCO slab you're in.
Apr 2026 · 4 min Try calculator →
Net Metering
Net metering என்ன? TANGEDCO approval process
What net metering means, how the bi-directional meter works, export credit rates (₹3.61/unit), and how long TANGEDCO takes to approve.
Mar 2026 · 5 min Read →
Installation
Sheet roof vs RCC — solar performance வித்யாசம் என்ன?
A comparison of generation efficiency, mounting methods, and cost differences between sheet (GI/asbestos) and RCC terrace installations in Tamil Nadu.
Mar 2026 · 4 min Read →
Real Numbers
Erode-ல் 5 kWp: ₹4,200 → ₹350 ஆனது எப்படி?
A detailed walkthrough of our Erode installation — bi-monthly units, TANGEDCO slab calculation before and after solar, and the exact payback math.
Feb 2026 · 6 min See case study →
Maintenance
Solar panels maintain பண்ண என்ன செய்யணும்?
How often to clean panels, what to check on your inverter display, and how to know if your system is underperforming before the next TANGEDCO bill arrives.
Jan 2026 · 3 min Read →
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