Electricity Amendment Rules 2026: What Changed for Captive Solar

Key Takeaways

• The Ministry of Power notified the Electricity (Amendment) Rules, 2026 on March 13, 2026, fundamentally revising Rule 3 of the Electricity Rules 2005 governing captive power generation
• Biggest change: A company, its subsidiaries, its holding company, and all other subsidiaries of that holding company are now treated as a single captive user — eliminating the previous restriction that only permitted direct subsidiary/holding company pairs
• Energy storage is now explicitly recognised: Electricity consumed via battery storage systems (BESS) connected to a captive plant qualifies as valid captive consumption — resolving a major regulatory ambiguity for solar+storage projects
• AoP (Association of Persons) structures get clarity: Members holding 26%+ ownership face no proportionate consumption caps; others are capped at 100% of their proportional entitlement based on equity stake
• Verification moved to NLDC/State Nodal Agencies (from CEA for interstate cases), with a new Grievance Redressal Committee for appeals
• The core thresholds remain unchanged: 26% ownership + 51% captive consumption required to qualify as a captive consumer and avoid Cross-Subsidy Surcharge (CSS)

Group captive solar has long been one of the most cost-effective models for large industrial consumers to access clean energy in India. The framework allows multiple companies to jointly own a solar plant and consume its output as "captive consumers" — qualifying for exemption from the Cross-Subsidy Surcharge (CSS), which saves ₹1–2.50/kWh compared to standard open access tariffs.

But the existing rules (Electricity Rules 2005, Rule 3) created several practical complications: corporate groups found it difficult to aggregate consumption across multiple entities; hybrid solar-plus-storage projects faced regulatory uncertainty about whether stored electricity qualified as captive consumption; and compliance verification was inconsistent and slow.

The Electricity (Amendment) Rules, 2026 — notified on March 13, 2026, with key AoP provisions effective April 1, 2026 — directly addresses these pain points. Here is what changed and what it means for industrial solar buyers.

Background: Why the Captive Solar Rules Needed an Overhaul

India's industrial electricity tariffs have risen sharply. In many states, HT (high tension) industrial consumers pay ₹7.50–10.00/unit from DISCOMs in 2026. Captive and open access solar, by contrast, can deliver power at ₹3.50–5.50/unit all-in — savings of 35–55%.

The most powerful route to captive solar savings is the group captive model:

• Multiple industrial companies jointly hold at least 26% equity in a solar plant
• They consume at least 51% of the plant's annual output
• Result: they are classified as "captive consumers" — exempt from Cross-Subsidy Surcharge and Additional Surcharge

The CSS exemption alone saves ₹1.00–2.50/unit versus regular open access. For a large industrial consumer using 2–5 lakh units/month, this represents ₹2–12 lakh per month in additional savings.

Despite its attractiveness, the group captive model had accumulated several legal grey areas that created disputes between generators, consumers, and DISCOMs:

1. Corporate group aggregation: Could a company aggregate consumption across its subsidiaries to meet the 51% consumption threshold? Previously only direct subsidiary-holding company pairs were recognised — multi-layered corporate structures were excluded.
2. Energy storage: If a captive plant generated solar power, stored it in a BESS, and the consumer drew it out at night — did that counted as captive consumption? The old rules were silent on this.
3. AoP proportionate consumption: In multi-party group captive arrangements structured as an AoP, what happened if one member consumed more than their proportional share? DISCOMs were demanding CSS on the "excess" — creating disputes.
4. Verification inconsistency: CEA was handling inter-state verification slowly; no consistent grievance mechanism existed.

The 2026 Amendment directly resolves all four issues.

What Exactly Changed: Key Provisions

1. Expanded Definition of "Captive User" — Single Entity Treatment

Old rule: Only a subsidiary and its holding company (or vice versa) could be treated as a single captive user.

New rule (effective March 13, 2026): A company, all its subsidiaries, its holding company, and all other subsidiaries of that holding company are now deemed a single captive user for purposes of Rule 3.

What this means in practice:

• An industrial conglomerate with a parent company + 5 subsidiaries can aggregate all their electricity consumption across entities when testing whether the 51% threshold is met
• Corporate restructurings (mergers, acquisitions of sister companies) no longer jeopardise group captive compliance
• Multi-plant companies (e.g., a textile group with plants in Rajasthan, Gujarat, and Maharashtra) can treat all plants as a single consumer

This is the most significant change for large industrial groups who had been unable to use the group captive model effectively due to their corporate structure.

2. Battery Energy Storage Systems (BESS) Now Explicitly Qualify

Old rule: Silent on whether electricity consumed via a battery storage system connected to the captive plant counted as captive consumption.

New rule: Electricity consumed through a battery storage system connected to a captive generating plant (CGP) explicitly qualifies as valid captive consumption.

What this means in practice:

• Solar + BESS projects are now fully viable for group captive arrangements, without regulatory risk that BESS-discharged electricity might not qualify
• Industrial consumers who need evening/night power from solar (stored during daytime) can structure a captive solar+storage project and count the full 24-hour output toward captive consumption
• Hybrid round-the-clock renewable energy projects (solar + wind + BESS) are now fully bankable for captive structures
• Project financing becomes easier as lenders can rely on full regulatory clarity for BESS components

3. AoP Proportionate Consumption — Clarity on Who Gets Capped

Old rule: Vague on proportionate consumption requirements in multi-party AoP group captive structures.

New rules (effective April 1, 2026):

• Members holding 26% or more ownership in the group captive plant: No proportionate consumption cap — their entire electricity consumption from the plant qualifies as captive, regardless of ratio to ownership
• Members holding less than 26% ownership: Consumption capped at 100% of their proportionate entitlement (i.e., consumption cannot exceed their equity share percentage of total plant output in a year)

What this means in practice:

• A dominant investor holding 30%+ stake gets maximum flexibility — they can draw as much as they want from the plant without breaching proportionality rules
• Minority participants (say, 5% equity holders) are constrained to consume no more than 5% of annual output
• This prevents "free rider" dynamics where a small equity holder draws disproportionate amounts and triggers CSS liability for others
• Weighted average principle: If ownership changes mid-year (new investor joins), the new shareholder must consume proportionate to their effective shareholding duration during the year — preventing year-end compliance manipulation

4. Verification Shifted to NLDC and State Nodal Agencies

Old rule: Central Electricity Authority (CEA) handled verification for inter-state captive projects — a slow, centralised process.

New rule (effective April 1, 2026):

• Inter-state captive projects: Verification by NLDC (National Load Despatch Centre)
• Intra-state captive projects: Verification by state-designated nodal agencies
• New Grievance Redressal Committee: Appeals mechanism for disputes; CSS and Additional Surcharge remain exempt during ongoing verification if proper declarations are submitted

What this means in practice:

• Faster verification — NLDC handles ISTS (inter-state) power flows and has better data than CEA
• State consumers get state-level resolution for intra-state arrangements
• Industrial buyers are protected during the verification period — DISCOMs cannot demand CSS during a pending appeal if the consumer has filed proper declarations

Why This Matters for Industrial Solar Buyers in 2026

The 2026 Amendment makes group captive solar significantly more accessible and legally secure for Indian industrial consumers. Specifically:

For corporate groups with multiple entities: You can now aggregate your combined electricity consumption across the entire group to meet the 51% captive consumption threshold. If your parent company consumes 60,000 units/month and your four subsidiaries consume 40,000 units/month each (total 220,000 units/month), all can collectively own 26%+ of a 4 MW solar plant and qualify as captive consumers for all 220,000 units/month.

For solar + battery storage projects: The BESS recognition eliminates the biggest legal risk in 24/7 captive solar structures. You can now confidently invest in solar + 4-hour BESS and have your lender, DISCOM, and regulator all agree that the night-time battery discharge qualifies as captive consumption.

For existing group captive arrangements with proportionality disputes: The clear proportionality rules reduce the risk of DISCOM reclassifying your arrangement and demanding backdated CSS. If you hold 26%+, your full consumption qualifies with no cap. If you hold less than 26%, ensure your annual consumption stays within your proportional entitlement.

For new entrants to group captive: The statutory recognition of SPVs as AoPs, and the clearer rules around AoP membership consumption, make it easier to structure a multi-party group captive arrangement with clear rights and obligations for each participant.

The Cross-Subsidy Surcharge (CSS) Benefit — Still the Core Incentive

The fundamental financial incentive of captive solar has not changed — only the rules to access it have improved.

Captive consumers remain exempt from CSS and Additional Surcharge (AS). In major industrial states, CSS is:

For a large consumer drawing 5 lakh units/month from a captive solar plant in Haryana, CSS exemption alone saves approximately ₹6–10 lakh per month versus standard open access solar. Over a 25-year PPA, this represents enormous accumulated savings.

The all-in cost of group captive solar power (post-amendment, with improved legal certainty) is typically ₹3.80–5.50/kWh depending on state, project size, distance, and whether storage is included — compared to DISCOM HT tariffs of ₹7.50–10.00/kWh.

Checklist: Is Your Company Ready for Group Captive Solar Post-Amendment?

Work through this checklist with your legal and energy team:

1. Corporate group mapping: Identify all entities (parent, subsidiaries, holding) that can now be aggregated as a single captive user. Quantify combined monthly electricity consumption.

2. Equity stake determination: Confirm your group's aggregate ownership in the proposed solar plant meets 26% minimum. Understand whether you will be in the "26%+" or "sub-26%" AoP category.

3. Consumption planning: Project annual consumption per entity for the first 5 years — ensure 51% of annual plant output will be consumed captively across the group.

4. BESS decision: If your consumption profile includes significant evening/night usage, evaluate solar + BESS. The 2026 amendment makes this legally viable.

5. SPV or AoP structure: Confirm which legal structure (direct shareholding in a plant company, SPV as AoP) suits your group's accounting, tax, and governance preferences.

6. Verification readiness: Prepare annual metering data, ownership certificates, and consumption attestation for NLDC/state nodal agency compliance filing.

For a comprehensive introduction to the group captive model, see our earlier guide: Group Captive Solar in India: Complete Guide.

How Sun Wave Technologies Can Help

Sun Wave Technologies works with industrial clients to structure, procure, and execute solar projects across Delhi-NCR, Haryana, Rajasthan, UP, Gujarat, and Maharashtra. For group captive arrangements specifically:

• Group captive assessment: We evaluate whether a group captive structure suits your consumption profile and corporate structure
• Developer identification: We connect industrial buyers with credible solar plant developers offering group captive capacity
• EPC execution: For clients building their own captive plant, we provide end-to-end EPC services including ALMM-compliant module procurement
• Documentation support: We assist with the technical documentation required for NLDC and state nodal agency verification

To discuss group captive or open access solar for your facility, reach out to Sun Wave Technologies at sunwavetechnologies.in.

For a comparison of all solar models available to industrial buyers: CAPEX vs OPEX vs Open Access Solar for Industries.

And for understanding the economics of solar investment: Solar Panel ROI and Payback Period for Indian Industry.

Frequently Asked Questions

Q: When exactly did the Electricity (Amendment) Rules 2026 come into force? The general provisions and expanded captive user definition came into force on March 13, 2026 (the notification date). The AoP proportionate consumption rules (Rule 3(2)(d)) and the new verification framework (Rule 3(4)) came into force on April 1, 2026.

Q: Does the 26%/51% threshold still apply under the amended rules? Yes — the core thresholds are unchanged. Captive users must collectively hold at least 26% equity in the plant, and the group must consume at least 51% of annual generation for captive purposes.

Q: Can my company (with no subsidiaries) use the expanded definition to aggregate with a partner company? No — the expanded definition applies to legal corporate group relationships (parent-subsidiary chains). It does not allow unrelated companies to claim single captive user status. For unrelated companies wanting to share a solar plant, the AoP group captive structure still applies with the proportionate consumption rules.

Q: What happens if one company in our AoP draws more than its proportionate share in a given year? If an AoP member holding less than 26% equity consumes more than 100% of its proportional entitlement in a financial year, the excess consumption may not qualify as captive consumption and could attract CSS from the DISCOM. Companies should monitor monthly consumption against their proportional entitlement and adjust drawl schedules accordingly.

Q: Is BESS storage eligible for CSS exemption or only for consumption threshold calculation? The 2026 amendment specifically says electricity consumed via BESS connected to the captive plant qualifies as captive consumption — meaning it counts toward the 51% threshold. The CSS exemption flows from meeting the captive consumer definition, so BESS-discharged electricity, now qualifying as captive consumption, is also CSS-exempt. Confirm the specific arrangement with your legal counsel.

Q: Does the verification change (NLDC vs CEA) affect our existing captive arrangements? For existing inter-state group captive arrangements, verification compliance will now be handled by NLDC rather than CEA. Your annual compliance filings and any pending disputes should be redirected to NLDC. The amendment provides for a Grievance Redressal Committee for disputes arising from the new framework.

Q: Can I set up a group captive solar plant under RESCO / third-party ownership? No — in a true group captive arrangement, the captive consumers must hold at least 26% equity in the generating plant. A RESCO model (where a developer owns 100% of the plant) does not qualify for captive consumer status. The consumers must have a genuine equity stake. Many EPC developers structure hybrid arrangements where the industrial client buys 26% equity and the developer retains 74%.

Sources

• PV Magazine India — Reforming Captive Power in India: Key Changes under the Electricity (Amendment) Rules, 2026 (March 31, 2026): pv-magazine-india.com
• Sau Energy — Electricity Amendment Rules 2026: Easing the Path to Green Energy for India's C&I Sector: saurenergy.com
• Mercom India — Government Notifies Amendments to Captive Power Project Framework: mercomindia.com
• Bar and Bench — Captive Power in Transition: Electricity (Amendment) Rules 2026: barandbench.com
• Mondaq — Captive Power Rules Rewritten: mondaq.com