How It Works, Benefits & Step-by-Step Process
If you’re exploring rooftop solar for your home in Tamil Nadu and Vellore, one of the most valuable policy supports you should know about is net metering. It lets you use the electricity your solar system generates and save credits when you send excess power back to the grid — meaning bigger savings on your monthly electricity bill.
This guide from DSS Solar and Automation explains how net metering works in 2026, who can apply, and how it helps you maximize the value of your solar investment.
What Is Net Metering?
Net metering is a billing arrangement between you and your electricity utility (in Tamil Nadu, typically TANGEDCO) that tracks the electricity your solar panels send to the grid versus what you draw from it.
- When your solar system produces more electricity than you use, the extra is exported to the grid and credited to your account.
- When your home needs more power than your system is generating, you draw from the grid using those credits.
In simple terms:
📌 Net Metering = Solar Units Generated — Grid Units Used
If your system generates more than you consume, your next bill goes down. If you consume more than you generate, you pay only for the difference.
How Net Metering Benefits Homeowners
Here’s why net metering is a powerful advantage for residential solar in Tamil Nadu and Vellore:
1. Lower Electricity Bills
Solar energy covers your daytime usage. Any surplus exported to the grid becomes credits, reducing your future grid consumption.
2. Fast Return on Investment
With net metering credits, your solar system’s payback period improves significantly.
3. No Wasted Solar Power
Without net metering, unused solar power is lost. With it, all surplus gets credited to your account.
4. Longer System Value
Net metering increases the lifetime savings you get from rooftop solar — even during low-generation months.
Who Can Apply for Net Metering?
Net metering in Tamil Nadu and Vellore is available to:
✔ Residential consumers with a valid LT domestic electricity connection
✔ On-grid or hybrid solar systems installed on houses or apartments
✔ Systems approved by the utility following state net metering regulations
✔ Installations handled by authorized solar providers like DSS Solar and Automation
Net metering does not apply to off-grid systems or solar systems not connected to the utility grid.
Net Metering Eligibility (2026 Standards)
To qualify:
- You must have an approved grid connection in your name.
- Your solar system must meet technical specifications set by TANGEDCO.
- DSS Solar and Automation will help submit technical details, one-line diagrams, and compliance documents.
- Once verified, net metering permission is granted and an official meter is installed that can record import and export flows.
How Net Metering Works (Step by Step)
Here’s a clear, step-by-step process for net metering in Tamil Nadu and Vellore:
1. System Installation
Your solar installer (like DSS Solar and Automation) completes the rooftop solar installation as per MNRE and utility guidelines.
2. Application Submission
We help submit your net metering application and system details to the local grid authority.
3. Technical Verification
A utility technician checks your site and confirms it meets safety and technical standards.
4. Meter Installation
Once approved, a bi-directional net meter is installed. This meter tracks:
✔ Units exported to the grid
✔ Units drawn from the grid
5. Start of Net Metering
After meter commissioning, net metering begins and your billing reflects both import and export credits.
How Bills Are Calculated
With net metering, your electricity bill is based on net units:
📌 Net Units = Units Consumed — Units Exported
Example:
- Solar generated in a month: 350 units
- Electricity used from grid: 220 units
- Net units = 220 − 350 = −130 units
In this case, you won’t pay for the 220 units drawn from the grid — those are covered by solar generation — and you will have 130 units of credit carried forward to the next billing cycle.
Tips to Maximize Net Metering Benefits
Here’s how to make the most of net metering in Tamil Nadu and Vellore:
✔ Right System Size
Match your system capacity to your household usage. Oversized systems generate more credits; undersized systems may not cover consumption.
✔ Orientation & Tilt
Proper panel angle increases generation and export potential.
✔ Monitor Your Generation
Use monitoring apps or dashboards to track your solar output vs your household load.
✔ Plan Loads Smartly
Shift high-usage appliances to daytime when solar generation is highest.