Updated 2026

Open Access Solar & Net Metering Rules in Maharashtra (2026)

Maharashtra is India's largest industrial power market. MERC governs both open access procurement and rooftop net metering — this guide covers what C&I buyers need to know for 2026.

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Regulatory source: Maharashtra Electricity Regulatory Commission (MERC) governs open access and net metering in Maharashtra. DISCOMs include MSEDCL (state utility), BEST (Mumbai), and Tata Power / Adani Electricity (Mumbai licensed area). Rules and charges vary by DISCOM zone.

Open access solar in Maharashtra — overview

Maharashtra's large industrial clusters in Pune, Nashik, Aurangabad, Nagpur, and the Mumbai Metropolitan Region make it one of the highest-volume open access markets in India. The state has seen growing adoption of group captive structures alongside conventional third-party open access.

Open access eligibility

ParameterApplicable rule
Minimum contracted demand (STOA)1 MW for HT/EHT consumers
Consumer categoryHT Industrial, HT Commercial, EHT categories
Application authority (MSEDCL area)MSEDCL open access cell; SLDC for scheduling
Mumbai licensed areasBEST, Tata Power, Adani Electricity — separate applications; eligibility criteria may differ

Key open access charges in Maharashtra

ChargeStatus for solar OANotes
Wheeling chargeApplicableAs per current MERC tariff order; depends on voltage level of injection and drawl
Cross-subsidy surcharge (CSS)Applicable (partial relief in some periods)CSS has been a significant cost component in Maharashtra for industrial consumers; renewable OA CSS treatment subject to MERC orders
Additional surchargeApplicable if DISCOM has stranded PPA obligationsHas been a contested item in Maharashtra; current applicability per latest MERC order
Transmission charge (MSETCL)ApplicableMaharashtra State Electricity Transmission Company Limited charges for EHT network use
BankingLimited availabilityBanking provisions vary under current MERC orders; check applicability for your project structure
Note on CSS in Maharashtra: Maharashtra has historically had relatively higher CSS for industrial OA consumers compared to some other states. This is a key variable in calculating the viability of open access solar vs grid tariff. Model your specific situation carefully before committing to a PPA structure.

Net metering rules in Maharashtra (rooftop solar)

For consumers installing rooftop solar below the open access threshold (typically under 1 MW), MERC's net metering regulations provide a separate framework:

ParameterCurrent rule
Eligible consumer categoriesLT and HT consumers (residential, commercial, industrial) with rooftop or solar generation on their premises
Maximum capacityUp to the sanctioned load or contracted demand
Meter arrangementNet meter (single bi-directional meter or two meters); surplus units fed back to grid
Settlement of surplusSurplus units carried forward monthly; annual settlement at a DISCOM-specified rate per MERC order
Application authorityRelevant DISCOM (MSEDCL, BEST, Tata Power, Adani Electricity depending on zone)
Connection approval timeline30–60 days from complete application; timelines vary by DISCOM zone

Net metering policy has been revised across India; always confirm the current MERC order for the applicable settlement rate and annual carry-forward provisions before system sizing.

Group captive in Maharashtra

Group captive is particularly popular in Maharashtra among industrial clusters, especially in the auto components, textiles, engineering, and pharmaceutical sectors where multiple companies share common industrial estates. Under group captive, the CSS advantage is significant:

  • Participating consumers must collectively hold ≥26% equity in the project.
  • At least 51% of annual generation must be consumed by the captive consumers.
  • CSS exemption under the Electricity Act reduces the landed cost of power substantially compared to third-party open access.
  • Group captive requires an SPV or co-investment structure but provides long-term tariff stability over a 15–25 year period.
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Frequently asked questions — Maharashtra

It depends on your consumer category and the all-in landed cost analysis. Maharashtra's CSS and additional surcharge components can be significant. In some HT industrial categories, open access solar remains cost-advantageous especially for consumers with contracted demand above 2–3 MW. Always model the complete landed unit cost before deciding.

A commercial consumer in Pune (MSEDCL zone) can install rooftop solar up to their sanctioned load. A net meter is installed to track generation and drawl. Surplus units are fed to the grid and settled monthly (carried forward) with annual financial settlement at the rate specified in the current MERC order.

Yes. Captive consumers (including group captive) are generally exempt from CSS under the Electricity Act, 2003, as they are not open access consumers in the traditional sense. This is one of the primary financial advantages of the group captive structure in Maharashtra where CSS is a significant cost item.

Yes, but the application process and applicable charges differ from the MSEDCL area. Applications go to the relevant licensed DISCOM (Tata Power or Adani Electricity), and their tariff orders (approved by MERC) determine wheeling and CSS. Engage a consultant familiar with the specific Mumbai licensed area if you are in this zone.

Related state guides

Gujarat (2026)
Karnataka (2026)
Rajasthan (2026)

Content credibility

  • Written by: Wattency Product Team
  • Reviewed by: Wattency Engineering and Domain Advisory
  • Last updated:
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