This article will help you- the roof-top solar plant owner- understand how net-metering works in Delhi.
A rooftop solar plant generates electricity during the daytime, typically between 6AM and 6PM. Whereas in a residential setup, the electricity consumption is mostly in the evening when the family comes home. The net metering scheme ensures that you do not need to install power backup to store this excess generation during the day for consumption later. With net metering, the grid effectively operates as your free, infinite storage. You can generate electricity; export excess to the grid and consume against that export at any other time, without any extra expenditure.
All three DISCOMs in Delhi, BSES, TPDDL and NDPL, offer the option for net metering to their consumers who want to install roof-top solar.
How does net metering in Delhi work:
Here is a step wise understanding of how net metering works.
- You apply online or offline for a net metering connection with your existing electricity distribution company. Apart from your application form, you submit a schematic or single line diagram of the solar plant that is proposed. As per Delhi guidelines, your roof-top solar plant’s capacity can be less that or equal to your connected load. Links for all three Delhi DISCOMs are listed below:
- Your solar plant gets approved depending on the infrastructure in your local area and capacity of solar that has already been installed
- After approval, you get the roof-top solar plant installed as per the approved single line diagram
- Intimate your DISCOM after installation and submit the documents required which include specifications, datasheets and safety certificates of the installed equipment
- Your DISCOM representative will come and inspect your rooftop solar installation for safety and to ensure that it is as per guidelines. In case of any discrepancy, they will inform you and the same needs to be rectified.
- After clearance, your DISCOM will replace your existing electricity meter with a bi-directional energy meter. Such a meter is able to record how much electricity you export, how much you import, and the net difference. They will also install a separate solar meter, that will record your solar plant’s generation.
- Billing- After installation of the net meter, your monthly electricity bill will start reflecting these three readings- solar generation, import, export and net consumption (Import- export). You will only be billed for the net consumption. This way your solar plant acts as a cost savings. See a sample net metering Delhi electricity bill here.
- In case of any excess export of electricity in any given month, the same will be carried forward to the next month and can be offset then. This carry forward is permitted at any time during one financial year, i.e. April 1st to March 31st of the next year. In case of any excess still remaining at the end of the financial year, you will be compensated for the same at the existing power purchase cost of the DISCOM.
PRO-TIP: If you get a roof-top solar plant installed by a government approved vendor, such as Sunkalp Energy, in addition to a 30% upfront subsidy on your plant cost, you will get an additional rebate on your bill of Rs.2/unit of solar electricity generated for the first 5 years. This will amount to a rebate of more than Rs. 25,000 per annum for a 10 kW solar plant.
If you need help with net-metering in Delhi, we at Sunkalp Energy, as your trusted installer will take care of the entire process on your behalf. Get in touch with us at +911141647143