Open Access Electricity in India: A Buyer's Guide to Eligibility, Approvals and Charges

Open access is the most-discussed and least-explained route in Indian corporate procurement. The reason is that the interesting parts are not in the statute. The Act gives you the right; what it costs you, how long approval takes, and whether you can bank surplus energy are answered in a stack of Rules, regulations and state orders that has been amended repeatedly since 2022.

This page walks the whole path: what open access is, where the right comes from, who qualifies, how approval actually works, what you pay, and what happens if you want to leave. It quotes the provisions and dates them. It does not put a rupee figure on anything, because landed cost depends on your state, your consumer category, your network use and your consumption shape, and any single number would be wrong for almost every reader.

What is open access?

Two things in that definition do a lot of work. “Non-discriminatory” is the substance of the right — the network owner cannot prefer its own supply. And “in accordance with the regulations specified by the Appropriate Commission” is the catch: the right exists nationally, the terms are written by a commission, and for most industrial buyers that means their State Commission. For the shape of the sector these institutions sit in, see how India's power sector is structured.

Where does the right come from?

There are two doors, and the difference between them matters more than anything else on this page.

That asymmetry is why “is captive cheaper than third-party open access” is the wrong question. Captive removes two charges and adds an annual compliance obligation with a claw-back if it fails. Third-party open access carries the two surcharges and no status risk. The 2026 amendment to the Rules made the captive route materially more workable where several users share one plant: the ownership and consumption conditions are now tested across the users collectively, and one member drawing more than its entitlement is dealt with on that excess rather than by putting the whole plant’s status at risk. Association-of-persons structures themselves are not new — the Act has referred to them since 2003 — and what moved is how the tests apply to them, under the 2026 Electricity Amendment Rules. None of it removed the annual test.

Who is eligible?

Three numbers circulate, and only one of them is a current national threshold.

• 100 kW — for green energy open access, and this is the live national figure. The Green Energy Open Access Rules, 2022, as amended in May 2023, provide that “only consumers who have contracted demand or sanctioned load of Hundred kW or more, either through single connection or through multiple connections aggregating Hundred kW or more located in same electricity division of a distribution licensee, shall be eligible to take power through Green Energy Open Access and there shall be no limit of supply of power for the captive consumers taking power under Green Energy Open Access”. So a business with several small connections in one electricity division can aggregate to qualify.
• No threshold at all — for a captive consumer. The same proviso says so in terms: there is no limit of supply for captive consumers taking power under green energy open access.
• 1 MW — a state benchmark, not a statutory bar. The one-megawatt figure everyone quotes comes from a proviso to Section 42(2) directing State Commissions to open access, by regulations, to consumers above that level within five years. It was an instruction to regulators, not an eligibility rule for consumers. What actually governs conventional third-party open access is your State Commission's own regulation, which is commonly but not universally set at 1 MW.

The 100 kW figure is a floor on eligibility, not a ceiling on state generosity. Tamil Nadu's regulations, notified in September 2025, open green energy open access to consumers at 63 kVA and above — below the national floor. Check your own state's regulation rather than the national Rule, in both directions. For the generation side of the decision, see solar energy for businesses.

How do you actually get it?

The approval path has a national frame and a state reality, and they are not the same length.

The national frame is Grid-India, designated as the Central Nodal Agency under the 2022 Rules. It operates a centralised registry — the Rules require that “all the applications related to green energy open access shall be submitted on the portal set up by the said the Central Nodal Agency” — and a common application format prepared in consultation with the Forum of Regulators.

Who your nodal agency is depends on the term and the geography: the load despatch centre for short-term access, and the transmission utility for medium and long term, with the central utility and regional centre handling inter-state.

What do you pay to use the network?

This is the part that decides the commercial case, and it is worth being precise about what each charge is, who sets it, and whether anything caps it. Note what is central and what is not — almost everything that varies is a State Commission decision.

Four points on that table are worth drawing out, because they are where buyers and advisers most often go wrong.

• The cross-subsidy surcharge has two live caps, and they are not the same cap. The Tariff Policy caps it at a proportion of the tariff applicable to the consumer category seeking open access. A rule inserted into the Electricity Rules in December 2022 caps it at the same proportion of a different quantity — the average cost of supply — and does so by reference to Section 86(1)(a), not Section 42(2). Both instruments are live and neither repeals the other. Quoting a bare percentage without naming the denominator is wrong in every case, and the two are routinely swapped.
• The additional surcharge is capped and is meant to disappear. This is the most commercially important provision on this page and the one most often missed. A Rule inserted into the Electricity Rules in January 2024 provides that the additional surcharge levied on an open access consumer “shall not be more than the per unit fixed cost of power purchase of the distribution licensee concerned”, that it must be reduced linearly so as to be eliminated within four years of the grant of open access, and — critically — that it does not apply to the extent of the contract demand a consumer maintains with the licensee. Read that last point alongside the practice described further down this page: most buyers keep contract demand with their licensee and take open access alongside it. That is not only how they keep a backstop. It is also how they limit this charge.
• There is a separate limit on how fast it can rise. For a green open access consumer, the Rules provide that the cross-subsidy surcharge shall not be increased, during twelve years from the date the renewable plant begins operating, beyond a stated proportion of the surcharge fixed in the year open access was granted. That is an escalation ceiling, not a discount. It does not reduce what you pay today; it limits how much worse it can get over the life of the arrangement.
• Losses are not a charge, and treating them as one understates your exposure. A charge is invoiced. A loss is electricity that never arrives. If your state applies a loss percentage on the transmission and distribution legs, you contract for more energy than you consume, and no line item on any bill will tell you that.
• Electricity duty is the one item your State Commission cannot help you with. It is levied by the State Government under its own statute, changed by amending that statute, and it is not among the charges the Green Energy Open Access Rules permit to be levied on an open access consumer — because it is a tax rather than an open access charge. For context on how electricity prices have moved generally, see how Indian electricity prices have moved.

The inter-state transmission charge waiver, and what it actually does

If your generator is in another state, inter-state transmission charges enter the landed cost, and a waiver has been phasing down against the project's commissioning date. As at September 2026 the applicable band is a 50% waiver, for projects commissioned between 1 July 2026 and 30 June 2027. It steps down to 25% on 1 July 2027, and projects commissioned after 30 June 2028 get none. Once earned, a band runs for twenty-five years from commissioning for wind, solar and pumped storage — so a contract signed today from an older plant may sit in a more generous band than a new one. The waiver period is shorter for battery storage, so check the technology as well as the date.

Banking, and why surplus no longer carries forward

Banking is the arrangement that lets you inject more than you consume in one period and draw the difference later. It is what makes a variable renewable supply usable against a steady industrial load, which is why it is often the single most valuable term in an open access arrangement.

The central Rules set a floor: banking “shall be permitted at least on a monthly basis”, and the permitted quantum “shall be at least thirty percent of the total monthly consumption of electricity from the distribution licensee by the consumers”. Note that denominator carefully — it is consumption *from the licensee*, not total site consumption. A site drawing most of its electricity from open access has a smaller bankable quantum than the headline suggests.

Surplus does not roll over, and has not since the Rules were made. The original 2022 text already barred carrying banked credit forward, month to month. What an amendment of January 2023 added is the consequence: the Rules now provide that “the credit for banked energy shall not be permitted to be carried forward to subsequent banking cycles”, that unutilised surplus “shall be considered as lapsed at the end of each banking cycle”, and that the generating station gets renewable energy certificates to the extent of the lapsed energy. So banking is a within-cycle balancing tool, not a savings account — and a surplus you cannot use is a surplus you have given away.

What states do with that floor varies widely, and this is where the commercial case is usually won or lost. One state has moved to monthly banking, zoned it by time of day so banked energy can only offset consumption in the same zone, and excluded third-party open access from banking altogether. Another has its whole banking-charge framework on a rolling extension pending a study. Because banking is where the profile risk sits, supply shape matters commercially as well as technically — see a wind-solar hybrid supply profile.

What happens when your generator stops?

Your distribution licensee is the backstop, and it is obliged to be. The Tariff Policy provides that “in case of outages of generator supplying to a consumer on open access, standby arrangements should be provided by the licensee on the payment of tariff for temporary connection to that consumer category”, and caps that at a proportion above the normal tariff of the category.

The Green Energy Open Access Rules add something more useful. Standby charges are capped as a proportion of the energy charges of your tariff category — and they “shall not be applicable” at all if you give notice before the day-ahead market closes on the day before delivery. In other words, a foreseeable outage that you schedule around properly costs you nothing in standby charges. An unforeseen one does.

Two cautions. The central ceiling was raised by amendment in January 2023, and at least one state's regulations still print the earlier, lower figure — so a state regulation is not a safe source for this number. And where a supply genuinely has to be firm rather than variable, the answer is usually structural rather than contractual: see firm and dispatchable renewable energy.

Can you go back to your distribution licensee?

Yes, and this is the question no page on this subject seems to answer.

The statutory backstop is Section 43 of the Act, the duty to supply on request: a licensee must give supply within one month of a complete application, and is liable to a penalty for each day of default. That duty does not disappear because you went on open access, and the regulators' own forum has recorded the appellate position — from a 2006 ruling of the Appellate Tribunal in Hindalco's case against the West Bengal commission — that so long as an open access consumer abides by the subsisting terms, the licensee is obliged to supply, with standby energy supplied on terms to be agreed.

The commercial terms of leaving and returning, though, are set state by state, and they can be expensive. A typical state framework requires notice — a year for a long-term consumer, thirty days for medium-term, a couple of days for short-term — and charges a proportion of the transmission and wheeling charges for the period you fall short of your committed term. Short-notice exit from a long commitment is the expensive case.

In practice most buyers never fully leave, and that is the real mechanism. Businesses keep contract demand with the licensee and take open access alongside it, which is why partial open access requires a consent to reduce contract demand and why one state amended its regulations in February 2026 to require a consumer to declare up front whether it intends to take open access up to its contract demand, above it, or both.

One live legal question you should know about

The central Green Energy Open Access Rules, 2022 were made under the general rule-making power in Section 176 of the Act, not under Section 42. In a judgment delivered around the turn of 2024 into 2025, the High Court of Karnataka struck down those Rules, together with that state's own 2022 green open access regulations, as beyond what the Act permits a Rule to do — on the reasoning that the Central Government could not use a residual rule-making power to occupy a field the Act assigns to State Commissions. The question was not whether the Union may legislate on electricity, which it plainly may; it was whether these particular Rules were within the parent statute.

What that means, precisely. It is a single-judge decision of one High Court and its effect is confined to Karnataka. The Ministry of Power and Grid-India continue to administer the Rules and the central registry nationally, and states continue to notify regulations that conform to them. A stay was sought orally when the judgment was pronounced and was refused. We have found no record of an appeal since, so nobody should assume the position is settled. If your project is in Karnataka, this is a question for your counsel rather than a detail. Everywhere else, it is a reminder that the framework this page describes rests on Rules whose foundation has been challenged once and could be again.

What open access is not

Three arrangements get called open access and are not.

• A green tariff from your own licensee. The Rules let a consumer requisition green electricity from its distribution licensee, for part or all of its consumption, at a tariff the Commission determines separately. No open access, no network application, and no charge stack — but no price certainty of your own either, since the tariff is set rather than contracted.
• A virtual power purchase agreement. There is no physical delivery and no open access: the generator sells into the market, you settle the difference against a strike price, and you carry on buying your actual electricity from your licensee. The central framework for these was issued in December 2025 and, as at September 2026, awaits a separate commencement notification.
• Captive supply. It uses open access to move the electricity, but the right comes from a different section and the surcharge position is different. See the comparison at the top of this page.

And none of the three, on its own, settles what you can claim about your electricity in a sustainability report. That depends on which instrument carries the environmental attribute — we have set out what green attributes a buyer actually receives separately.

How should a buyer work out whether open access is worth it?

Every charge on this page is set at state level, so the arithmetic belongs to one specific site and no page written for a general reader can do it for you. What is general is the order in which to do it.

1. Start with the charges that sit on top of the contract. Wheeling and network charges, losses taken in kind, electricity duty, and — if you are buying from a third party rather than consuming from a plant you part-own — cross-subsidy surcharge and additional surcharge. Then separate the permanent ones from the ones that are not: as set out above, the additional surcharge is capped, has to be eliminated on a fixed schedule, and does not reach the contract demand you keep with your licensee. Between them these charges are the whole difference between the price in the contract and the cost on the bill.
2. Then establish what your state lets you keep. The banking cycle, the denominator the bankable quantum is measured against, and what happens to surplus at the end of the cycle. Getting the denominator wrong overstates the benefit on exactly the sites most likely to be modelling it.
3. Then price the fallback. Standby charges, the notice period for reverting, and the licensee’s continuing obligation to supply are what decide the real cost of an outage or an exit. This is the part most often left out of a comparison.
4. Only then compare the two routes. The trade between captive and third-party open access is set out in the table near the top of this page. Which side of it suits a business follows from the three sets of numbers above, not from the headline.

Transmission planning and network access are matters for the transmission utilities and the commissions, and the approval sequence set out above runs on their timelines — which is why the first three steps take longer to settle than the fourth. For businesses at the comparison stage, how businesses contract renewable electricity sets out the routes available.

Frequently asked questions

What is the minimum load for open access in India?

For green energy open access, 100 kW of contracted demand or sanctioned load under the central Rules, and it can be aggregated across multiple connections in the same electricity division. There is no load limit for a captive consumer. For conventional third-party open access the threshold is set by your State Commission's regulation, commonly 1 MW. The 1 MW figure in the Act itself is a direction to regulators, not an eligibility rule.

How long does open access approval take?

The Rules give the nodal agency fifteen days to decide, with deemed approval if it does not. The practical path is longer, because grid connectivity, registration, distribution licensee consent and certified metering all have to be in place first. The regulators' forum has recorded real timelines of roughly two to six months depending on the state.

Is wheeling the same as transmission?

No. Wheeling charges are for use of the distribution network; transmission charges are for the transmission network, set centrally for the inter-state system and by the State Commission for intra-state. An open access consumer usually pays both, plus losses on each leg.

Do captive users pay cross subsidy surcharge?

No. The Act says the surcharge “shall not be leviable” where open access is provided to a person who has established a captive generating plant carrying electricity to the destination of their own use. A captive user is also not liable for additional surcharge, following a Supreme Court decision of December 2021. Network charges, electricity duty, banking and standby still apply.

Can I bank surplus renewable energy and use it next year?

No. Since January 2023 the central Rules prohibit carrying banked credit forward to a later banking cycle; unutilised surplus lapses at the end of the cycle and the generating station receives certificates for it. The minimum cycle under the Rules is monthly, and states differ considerably above that floor.

What is third party open access?

Buying from an independent generator you do not own, over the network, under the State Commission's open access regulations. It is the alternative to captive, where you own a qualifying share of the plant you draw from. Third party open access pays cross-subsidy and additional surcharge; captive does not, but carries an annual status test.