So you’ve installed rooftop solar or you’re planning to and now,
Everyone’s telling you to “apply for net metering.”
But when you actually sit down to figure out what that means, where to go, and what documents to carry, it gets confusing fast.
I’ve helped dozens of solar energy owners in Tamil Nadu navigate this exact process. This guide breaks it down clearly step by step, no jargon, no confusion.
What Is Solar Net Metering and Why Does It Matter for You?
Before we get into the process, let’s be clear about what you’re actually applying for.
When your rooftop solar system produces more electricity than you consume during the day, that surplus power flows back into the TANGEDCO grid. Without a net meter, your old uni-directional meter counts that exported power as consumption meaning you get charged for power you actually gave away. That’s money going in the wrong direction.
A bi-directional net meter records both what you import from the grid and what you export to it. At the end of each billing cycle, TANGEDCO calculates the difference. If you exported more than you consumed, the excess units are carried forward as credits against your next bill.
For solar energy owners in Tamil Nadu, this is the single most important step after installation. Without it, your system is financially incomplete.
Who Is Eligible to Apply?
TANGEDCO has kept eligibility fairly straightforward in 2026.
| Category | Eligibility |
| Residential | Valid EB consumer number, own property |
| Commercial | Valid EB connection, TANGEDCO-approved system capacity |
| Industrial (LT) | Same as commercial |
| Apartments | RWA can apply collectively or individually per meter |
| Renters | Generally not eligible owner must apply |
Key rule: Your solar system capacity must not exceed your sanctioned load. If your sanctioned load is 2 kW but you want a 3 kW solar system, apply for a load increase first otherwise your net metering application will be returned.
Check out TN MNRE SOLAR ROOFTOP SUBSIDY
Documents You Need for a Net Metering Application
Prepare these before you log in or visit the office. Missing even one document is the most common reason for delays.
| Document | Details |
| EB consumer card / latest electricity bill | Must match your name exactly |
| Identity proof | Aadhaar, Voter ID, or PAN |
| Property ownership proof | Sale deed, patta, or property tax receipt |
| Solar system technical specifications | Inverter make, panel wattage, total kWp |
| Inverter test certificate / datasheet | Confirming grid-interactive compliance |
| Wiring diagram | Prepared by your installer |
| Installation photographs | Panels, inverter, earthing pits |
| Name match check | Your name on EB card must match your ID proof exactly |
Important: If your EB card shows your father’s name as initials but your Aadhaar uses the full name, TANGEDCO will reject your application. Resolve name mismatches before applying. A name transfer at your local section office costs around ₹600 and takes 1–2 weeks.
How to Submit a Net Metering Application (Step by Step)
In 2026, TANGEDCO moved almost entirely to online processing through two portals. Here’s the complete flow:
Step 1: Register on the Portal
Go to www.tnebltd.gov.in/usrp – TANGEDCO’s Unified Solar Rooftop Portal (USRP).
- Create an account using your service number and registered mobile number
- If you’re applying under PM Surya Ghar scheme (for subsidy), you can also register on pmsuryaghar.gov.in
- Both portals are linked; your application flows to your local TANGEDCO Assistant Engineer (AE)
Step 2: Fill the Application Form
- Select your connection type (residential / commercial)
- Enter your solar system details capacity in kWp, inverter brand, panel specifications
- Provide your bank account details (required for subsidy disbursement if applicable)
Step 3: Upload Documents
Upload clear, legible scans of all documents listed above. Blurry or mismatched documents are the top cause of rejection. Double-check name spellings before uploading.
Step 4: Pay the Registration Fee
Official TANGEDCO fees (2026):
| Capacity | Registration Fee |
| Up to 5 kW | ₹1,000 (approx.) |
| 5 kW to 50 kW | ₹2,000–₹5,000 (based on capacity) |
Pay online through the portal you’ll receive a receipt. There are no other official cash payments required. If anyone asks for cash outside the portal, that is not an official TANGEDCO charge.
Step 5: Feasibility Check by AE
Your local Assistant Engineer receives the application and checks whether the Distribution Transformer (DT) on your street has sufficient capacity. The general rule is that total solar connected to one DT should not exceed 30–50% of its rated capacity. In most residential areas, this is approved automatically within 48 hours.
Step 6: Safety Letter Issued
Once feasibility is confirmed, TANGEDCO issues a Safety Letter (also called a “green light” letter). This is your authorization to proceed with installation if you haven’t done so already.
Step 7: Solar Installation and Earthing
Your installer sets up the panels, inverter, and critically earthing pits. TANGEDCO’s AE inspection specifically checks:
- DC earthing (lightning protection for panels)
- AC earthing (grid safety for inverter)
- Internal wiring quality and MCB ratings
Poor earthing values are the most common reason inspections fail. Use a licensed and experienced installer.
Step 8: AE Inspection
The AE visits your premises, inspects the installation, and verifies that everything meets TANGEDCO and CEA technical standards. Make sure your installer is present during this visit.
Step 9: Net Meter Installation and Commissioning
After inspection approval, TANGEDCO installs your bi-directional net meter. Your system is now live. You’re officially exporting solar energy to the grid and earning bill credits.
Realistic Timeline
| Stage | Typical Time |
| Online application + feasibility | 2–5 working days |
| Safety letter | 1–3 working days |
| Installation (by your vendor) | 3–7 days |
| AE inspection | 5–10 working days |
| Net meter installation | 7–15 working days |
| Total | 3 to 6 weeks |
If your application is pending for more than 15 days at any stage, escalate to the consumer grievance cell at your local TANGEDCO EDC.
Sign up for our #1 Zero-Cost Solar Installation in Ariyalur
What Happens to Your Excess Solar Units?
Under TNERC 2026 regulations, TANGEDCO uses a bi-monthly billing cycle for rooftop solar net metering:
- Units exported are credited against units imported
- Surplus credits carry forward to the next billing period
- At the annual settlement, any remaining credits are paid out at the applicable buyback rate (currently lower than retail tariff)
For most solar energy owners with a well-sized system, the bill in summer months will often reach zero and credits roll forward to cover winter months when generation dips.
Common Mistakes That Delay Your Application
- Name mismatch between EB card and ID proof
- System capacity exceeds sanctioned load load increase needed first
- Inverter not grid-interactive compliant always check before purchasing
- Poor earthing installation fails AE inspection
- Blurry or incomplete document uploads
Final Word
The rooftop solar net metering request process in Tamil Nadu is genuinely simpler in 2026 than it was even two years ago. The USRP portal has reduced the need for repeated office visits, and feasibility approvals happen faster than before.
The key is preparation, get your documents right, verify your sanctioned load, and work with an installer who understands the AE inspection requirements. Done right, you’ll have your net meter commissioned within a month and your electricity bill dropping from the very first billing cycle after that.
If you’re a solar energy owner in Tamil Nadu who’s been waiting too long for net metering activation, don’t wait to escalate through the official grievance channel and track your application status directly on the USRP portal.
FAQs
-
I installed solar 2 months ago but still no net meter – what do I do?
Follow up directly at your local TANGEDCO section office with your application reference number and commissioning report. Delays beyond 30 days can be escalated to your district EDC’s consumer grievance desk.
-
Can I apply for net metering if the solar system was installed by an unregistered vendor?
Your application will likely be held up. TANGEDCO technically requires the installer to be MNRE-empanelled, especially for subsidy-linked applications. For non-subsidy applications, a licensed electrical contractor may be sufficient to confirm with your local AE.
-
Does net metering work if I have a power cut?
No. Grid-tied solar systems shut down automatically during outages for safety reasons. You need a solar system with battery backup if you want power during grid cuts.
-
Will my EB bill actually go to zero?
It depends on your system size and consumption. A well-sized system for a 3 kW sanctioned load will typically reduce bills by 70–90% in peak summer. Bills rarely go exactly to zero because of fixed charges TANGEDCO applies regardless of consumption.