Bihar Rooftop Solar: Draft Revisits Surplus Payments

Bihar’s proposed rooftop-solar amendments put electricity-export assumptions back into focus for property owners evaluating installation costs and savings.

Mercom India reported on 9 October that the Bihar Electricity Regulatory Commission proposes a net-metering capacity limit of up to 500 kW. Its accessible report also states that excess electricity remaining at the financial year’s end would be compensated at 50% of the feed-in tariff -> Bihar Proposes 500 kW Cap for Rooftop Solar Net Metering.

The distinction is important: financial-year-end surplus compensation is not the same as the treatment of every unit exported during the year.

The proposal is still a draft

BERC’s official website lists the measure under draft regulations. The reviewed material does not establish a final notification or commencement date -> Draft Regulations on BERC (Rooftop Solar Grid Interactive Systems Based on Net and Gross Metering) (Second Amendment) Regulation, 2026.

Consumers should therefore distinguish the reported proposal from the rules currently applicable to their connection. The full draft’s provisions on settlement, eligibility and treatment of existing installations require confirmation before revising a project’s financial model.

Why export assumptions matter

A solar proposal can combine electricity consumed at the property, exports credited against imports and any residual surplus settled later. Those components need not carry the same financial value.

For a household installation well below the reported capacity ceiling, the settlement mechanism may be more relevant than the headline cap. Larger commercial and institutional proposals would also need to examine capacity eligibility.

The evidence reviewed does not establish that every Bihar solar customer would save less. The outcome depends on the final rules and the installation’s generation and consumption profile.

Subsidy and operating savings answer different questions

Vantage previously covered Bihar’s additional rooftop-solar assistance -> Bihar adds up to Rs.20,000 state subsidy for rooftop solar.

That coverage concerns support towards installation cost. The proposed metering amendments concern how electricity transactions are accounted for after installation. A lower purchase cost does not, by itself, establish annual savings.

What buyers should watch next

The next decisive evidence is BERC’s final notified text, its effective date and distribution-company implementation guidance.

Meanwhile, prospective buyers can ask installers to identify the rules behind their savings estimates and show separately the value of on-site consumption, adjusted exports and year-end surplus. Any calculation using the proposed treatment should be labelled a scenario.

Sources

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• Bihar Proposes 500 kW Cap for Rooftop Solar Net Metering published on 9 October 2026 in Mercom India.
• Draft Regulations on BERC (Rooftop Solar Grid Interactive Systems Based on Net and Gross Metering) (Second Amendment) Regulation, 2026 listed by Bihar Electricity Regulatory Commission; publication date not established. Reviewed on 11 October 2026.
• Bihar adds up to Rs.20,000 state subsidy for rooftop solar published on 23 September 2026 in Vantage Radar.

Reporting limitation: BERC’s draft listing was verified, but the complete underlying document was not retrieved. The reported capacity and compensation provisions remain attributed to Mercom’s accessible headline, summary and introductory text.

Does your solar quotation explain how surplus electricity is valued? Share the assumptions or your billing experience in the attached forum discussion.