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Open Access vs Captive Solar. Which model is right for your business?

As electricity tariffs continue to rise, industries and commercial establishments are adopting solar through Open Access and Captive models. Both offer substantial savings — the right choice depends on your consumption, investment preference, and long-term goals.

Get Free Feasibility Assessment 1800 889 0253
Open Access Solar by Vermson Energy
No CapexOpen Access option
30–50%Savings vs DISCOM
500 kW+Captive plant size
25 yrsPPA / performance tenure

Designed for industries and businesses with significant electricity consumption

  • Manufacturing Industries
  • Commercial Buildings
  • Warehouses
  • Retail Chains
  • Industrial Parks
  • Large Energy Consumers
The two models explained

Open Access or Captive — same goal, different ownership structure.

Open Access Solar

Purchase solar power from an off-site plant through the state transmission and distribution network. No investment in plant ownership — just lower electricity costs via a Power Purchase Agreement (PPA).

Captive Solar

Own a share in a solar power plant and consume the electricity generated. Maximum long-term savings, ownership of renewable energy assets, and stronger ESG credentials.

Open Access Solar

No plant, no investment. Just cleaner, cheaper electricity delivered to your meter.

Key benefits

  • No investment in solar plant ownership
  • Lower electricity cost vs DISCOM tariffs
  • Suitable for businesses with limited rooftop space
  • Flexible Power Purchase Agreement (PPA) options
  • Quick transition to renewable energy
  • Off-balance-sheet — no capex impact

Best suited for

  • Commercial buildings
  • Warehouses
  • Retail chains
  • Industries seeking immediate savings without capital investment
  • Businesses preferring OPEX over CAPEX
  • Medium to large electricity consumers
Captive Solar

Own the plant. Own the savings. Own the asset on your books.

Key benefits

  • Maximum long-term electricity savings
  • Greater control over energy costs
  • Exemptions from certain regulatory charges
  • 40% accelerated depreciation in Year 1
  • Ownership of renewable energy assets
  • Strong sustainability and ESG credentials

Best suited for

  • Manufacturing industries
  • Large commercial consumers
  • Industrial parks
  • Businesses with long-term energy requirements
  • Companies prioritising maximum ROI
  • Group captive / cluster arrangements
Side-by-side comparison

Open Access vs Captive Solar — at a glance.

Feature Open Access Captive Solar
Plant Ownership Developer-Owned Consumer-Owned / Co-Owned
Capital Investment Minimal Moderate to High
Long-Term Savings High Very High
Operational Control Limited High
Energy Cost Stability Good Excellent
Compliance Requirements Moderate Higher
Ideal Consumer Medium to Large Consumers Large Energy Consumers
Why Vermson Energy

One partner. Both models. Complete lifecycle support.

Detailed feasibility studies

We model both Open Access and Captive options on your real consumption data so you make the right choice for your business.

Advisory & structuring

Open Access project advisory and Captive Solar structuring — we handle SPV formation, equity drafting, and regulatory compliance end to end.

EPC project execution

From engineering and procurement to construction and commissioning — full EPC with Tier-1 equipment and a 25-year performance SLA.

Regulatory approval support

Open-access applications, wheeling agreements, DISCOM filings, and CEIG clearances — we drive every approval so you don't have to.

Long-term O&M services

Ongoing operation and maintenance with SCADA monitoring, performance reporting, and guaranteed uptime for the life of the plant.

ROI modelling

Every proposal includes a CFO-grade financial model — NPV, IRR, payback period, and tariff sensitivity analysis to support your decision.

30–50%

Savings vs DISCOM tariff

25 MW

Clean energy installed

25+ yrs

Solar EPC expertise

25 yrs

Performance tenure

Get a free feasibility assessment

Share your annual consumption — we'll model Open Access and Captive options and send a savings analysis in 5 days.

or call us directly 1800 889 0253

Related pages

FAQ

Open Access & Captive Solar FAQs

Ten questions we answer every week. Something else on your mind? Send us a message and we'll reply within one working day.

The eligibility criteria vary by state regulations. Many industrial and commercial consumers with significant electricity consumption can benefit from Open Access arrangements. We assess your state-specific eligibility as part of the free feasibility study.
Captive projects are commonly developed from 500 kW onwards. The actual project size depends on your energy consumption and regulatory requirements. Our team conducts a detailed load analysis to size the plant correctly for your needs.
Under captive power regulations, captive users generally need to collectively hold at least 26% ownership and consume at least 51% of the generated electricity annually. Vermson Energy structures the SPV and equity arrangements to ensure your project qualifies.
Captive Solar typically provides higher long-term savings due to ownership benefits, accelerated depreciation, and potential charge exemptions. Open Access offers lower upfront investment and quicker implementation. We model both on your real consumption data so you can compare like-for-like before deciding.
Yes. Group captive structures allow multiple consumers to participate in ownership and power consumption, subject to applicable regulations. This is ideal for industry clusters, business parks, or sister concerns that want to share a single large plant.
No. Both models can be implemented through off-site ground-mounted solar projects. The power is generated at a remote location and wheeled to your premises via the state grid under an open-access arrangement. No rooftop space required.
Payback periods vary based on project cost, energy consumption, and tariff savings. Many projects achieve attractive returns over their operating life, typically in the 4–7 year range depending on plant size and applicable tariff. We include a full payback and IRR model with every proposal.
Yes. Various banks and financial institutions offer funding options for renewable energy projects, subject to eligibility and credit assessment. Vermson Energy assists with bank referrals and financing coordination so the project moves forward without capital delays.
Yes. Commercial establishments — including malls, office buildings, retail chains, hotels, and hospitals — can benefit from either model depending on their consumption profile and regulatory eligibility. We assess your eligibility as part of the initial feasibility review.
Vermson Energy provides complete support from project feasibility and financial analysis to EPC execution, regulatory approvals, commissioning, and ongoing maintenance. We handle both Open Access advisory and Captive Solar EPC — so you get one accountable partner for the entire project lifecycle.

Planning a 500 kW+ Captive or Open Access Solar solution?

Free feasibility assessment. Customised savings analysis. ROI modelled on your actual consumption.

Get Free Assessment 1800 889 0253
Vermson Energy