The Tripura Electricity Regulatory Commission (TERC) has issued the first amendment to the TERC (The Grid Interactive Solar Rooftop Photovoltaic System under Gross/Net Metering) Regulation, 2024. The amendment, notified on October 30, 2025, follows a representation from the Tripura Renewable Energy Development Agency (TREDA) seeking clarifications and review of certain provisions under the 2024 regulations, specifically Regulations 5.3, 5.4, and 16.5. The Commission, after reviewing the submission, decided to revise these provisions to promote the growth of renewable energy in the state.
The amended regulations are officially titled TERC (The Grid Interactive Solar Rooftop Photovoltaic System under Gross/Net Metering) Regulations, 2024, (First Amendment), 2025, and they will come into force from the date of publication in the Tripura Gazette. The regulations apply throughout the state of Tripura and are issued under the powers granted to the Commission under Section 181(1), read with Sections 30, 39, 40, 42, and 86 of the Electricity Act, 2003.
Under the amendment, Regulation 5.3 now provides detailed limits on the capacities permissible under Net and Gross Metering. For individual consumers under Net Metering, the capacity can range from a minimum of 1 kWp to a maximum of 10 kWp or the contracted load/demand of the consumer, whichever is lower. For multiple points of an individual consumer under Net Metering, the range is from 5 kWp to 500 kWp. Group Net Metering capacities have also been defined, with a minimum of 5 kWp and a maximum of 500 kWp. Gross Metering is applicable for systems above 10 kWp up to 500 kWp and beyond.
The amendment to Regulation 5.4 specifies the permissible capacity of grid-interactive solar rooftop photovoltaic systems at various voltage levels. For low-tension single-phase systems of 240 V, the capacity limit is up to 4 kWp. Low-tension three-phase systems of 415 V are allowed from 4 kWp to 50 kWp. High-tension three-phase systems of 11 kV are permitted from above 50 kWp to 2,000 kWp, while 33 kV three-phase systems can range from above 2,000 kWp to 10,000 kWp. Extra-high-tension systems of 132 kV and above can have capacities exceeding 10,000 kWp.
The amendment to Regulation 16.1 changes the energy settlement and billing cycle to a quarterly basis. Regulation 16.5 has also been revised to clarify payments for excess energy import or export. Prosumers consuming more than they export in a billing month will pay for net energy at the applicable retail tariff. Conversely, excess exported energy will be paid by the DISCOM at the Feed-in Tariff set by the Commission. For domestic, irrigation, and water works solar consumers, excess injected energy above 100 units will be paid quarterly, with a capping of average generation at 3.8 units per kW per day. Any net energy credits below 100 units will be carried forward to the next billing period. For other consumers, the same capping applies, and surplus electricity at the end of the billing period will lapse without payment.
The amendment reflects TERC’s ongoing efforts to provide clarity on net and gross metering provisions and to encourage renewable energy adoption in Tripura. The updated regulations aim to balance consumer benefits, grid management, and the promotion of solar rooftop systems across the state.
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