India's commercial and industrial solar market is entering a new phase, and the numbers behind it are hard to ignore.
In the first half of 2026, India added nearly 6 GW of solar open access capacity - a 42% year-on-year jump over the roughly 4 GW installed during the same period in 2025. Q2 2026 alone contributed close to 3 GW, the highest quarterly addition on record. By June 2026, India's cumulative installed open access capacity had climbed to approximately 36 GW.
For the solar EPC industry, these numbers mean far more than another renewable-energy milestone. They point to a genuine shift in how Indian businesses think about electricity.
Large factories, manufacturing units, warehouses, and other commercial and industrial (C&I) consumers are increasingly looking past conventional grid power and space-constrained rooftop installations. They want cleaner electricity, yes — but just as importantly, they want predictable energy costs, scalability, and long-term control over one of their largest operating expenses.
That's exactly where open access solar, backed by professionally executed solar EPC projects, is becoming central to how Indian industry plans its energy future.
In simple terms, solar open access allows an eligible business to purchase renewable electricity generated at a solar project located away from its own premises. The electricity is generated at an off-site solar plant and delivered to the consumer through the existing transmission and distribution network.
This makes open access particularly valuable for industries that consume significant electricity but can't fit enough solar capacity within their factory premises. Picture a manufacturing plant that needs several megawatts of power but has a rooftop capable of hosting only a fraction of that requirement. Rather than letting available roof area cap its renewable ambitions, the business can simply source solar power from an off-site project instead.
Open access, in effect, changes the question a business asks itself. It's no longer:
"How much solar can we fit on our roof?"
It becomes:
"How much of our total electricity requirement can we strategically move to renewable energy?"
That's a meaningfully bigger question — and it's reshaping procurement decisions across Indian industry.
Under India's Green Energy Open Access framework, consumers with a contracted demand or sanctioned load of 100 kW or more — including qualifying aggregated connections within the same electricity division — are typically eligible for green energy open access. Notably, captive consumers aren't bound by this load threshold at all.
Rooftop solar had its moment, but it comes with a hard ceiling: available roof space. A steel plant running at 80%+ load factor simply can't fit enough panels on its roof to meaningfully offset its bill. Open access removes that constraint entirely — a factory in Coimbatore can buy power from a solar park 200 kilometres away, delivered straight through the state grid.
Industry voices are increasingly blunt about where large industrial demand is headed. As one C&I developer executive put it in a recent interview, open access will remain the primary route for large industrial consumers precisely because rooftop solar is space-constrained — while open access lets demand scale alongside expanding domestic manufacturing and rising electricity consumption, instead of being capped by square footage.
Three forces are converging to make 2026 the moment this shift accelerates :
1. The economics simply work. Even after wheeling charges, cross-subsidy surcharge, additional surcharge, and banking fees are stacked on top of the PPA tariff — typically adding ₹1.50–2.50 per unit in a favourable state — landed open access solar still beats grid tariffs by 30–40% in most industrial-heavy states.
2. Export compliance is now a P&L issue, not a PR line. With the EU's Carbon Border Adjustment Mechanism entering its definitive phase from January 2026, sectors like steel, cement, aluminium, and fertilisers exporting to Europe face real margin compression — estimates suggest 9–22% for Indian steel exporters — unless they can demonstrate reduced Scope 2 emissions. Open access renewable procurement is the fastest lever available to cut that exposure.
3. Corporate decarbonization has moved from aspiration to procurement policy. Global sustainability commitments, ESG ratings tied to financing access, and investor pressure are pushing C&I consumers to lock in long-term clean power contracts rather than dabble in offsets.
For an energy-intensive business, electricity isn't just another utility bill — it directly shapes manufacturing costs. Textiles, chemicals, engineering, metals, food processing, pharmaceuticals, and data-intensive facilities all run equipment for long hours, which means even relatively small movements in grid tariffs can meaningfully affect operating margins.
Solar offers something these businesses increasingly value: greater visibility over long-term energy costs. A well-structured open access PPA locks in a predictable tariff path years into the future, something conventional grid power simply can't offer in a market where tariffs keep climbing.
It's also worth noting that momentum tends to compound here. Recent industry reporting shows that C&I consumers who see real savings from their initial solar projects are increasingly expanding their renewable capacity further, rather than treating solar as a one-time sustainability initiative. Once the economics prove out on one facility, the second and third projects tend to follow much faster.
For years, businesses largely approached solar as an environmental checkbox. That conversation has changed.
Today, the first question inside many companies isn't only "how much carbon can we reduce?" It's increasingly "how much grid electricity can we replace economically?"
That distinction matters. When renewable procurement becomes part of financial and operational planning rather than a CSR line item, solar stops being just an installation project — it becomes an energy strategy with real balance-sheet consequences.
Businesses evaluating this shift generally have several procurement models to choose from:
The right model depends on the consumer's demand profile, location, applicable state regulations, available land or rooftop area, tariff structure, banking provisions, and long-term business objectives. This is precisely why choosing the right solar EPC company involves far more than comparing a quoted price per watt — it means finding a partner who can map your actual energy needs against the full range of available models.
As open access scales, the responsibility placed on the solar EPC sector scales right alongside it. Building an industrial-scale solar project is a very different undertaking from simply installing modules. A dependable C&I project requires engineering, procurement, civil and electrical execution, evacuation planning, grid integration, testing, commissioning, and long-term performance planning to function as one coordinated system — not a series of disconnected tasks.
A modern solar EPC partner is increasingly expected to understand the complete project environment, not just the panels. Engineering teams need to weigh plant capacity, site irradiation, land conditions, module layout, DC/AC design, transformer sizing, evacuation infrastructure, protection systems, and expected generation — all as interconnected variables. Procurement teams have to balance quality, compatibility, availability, and project timelines simultaneously. Construction teams then have to translate all of that into a plant capable of performing safely for decades. A poorly coordinated decision at any single stage can quietly erode the economics of the entire project.
For C&I open access projects, generation capacity is only half the equation — the consumer's actual energy requirement matters just as much. A properly executed project starts by understanding historical electricity consumption, contracted demand, daily and seasonal load patterns, the existing tariff structure, the renewable energy requirement, applicable open access charges, banking provisions, and future expansion plans. Only once these are mapped should capacity and commercial structure be finalized.
This consumer-first approach prevents two of the most common and costly mistakes in the industry: building a project too small to move the needle on the electricity bill, or oversizing capacity without a clear plan for how the extra generation will actually be used.
A solar plant can look excellent on paper and still fail commercially if evacuation and grid connectivity aren't planned correctly from day one. India's renewable expansion is already putting real pressure on transmission infrastructure, and recent reporting has flagged curtailment concerns in several renewable-rich states — a clear signal that transmission availability can't be treated as an afterthought.
For open access projects specifically, experienced EPC planning needs to evaluate the complete route from generation to evacuation, not just the solar array itself.
Solar procurement in 2026 is more tightly linked to regulatory timing than ever before. Mercom India's H1 2026 market analysis noted that project commissioning schedules were directly influenced by two shifts: the phased reduction of the Inter-State Transmission System (ISTS) charge waiver, and tightening sourcing requirements under ALMM List-II. Developers who read these timelines correctly moved their procurement forward; those who didn't ended up scrambling to catch up.
For a solar EPC company operating in India today, procurement is no longer just about sourcing components at the lowest possible price. It requires understanding compliance windows, project schedules, equipment compatibility, performance expectations, and long-term component availability — all at once.
The market isn't distributed evenly across India — and that concentration tells its own story.
As of June 2026, Karnataka accounted for roughly 21% of India's cumulative open access solar capacity, while Rajasthan and Maharashtra each held close to 16%. Together, the top five states represent around 77% of all cumulative installations, with Rajasthan currently carrying the largest development pipeline, closely followed by Maharashtra and Karnataka.
Open access grows fastest where three things line up together: strong industrial demand, suitable renewable resources, and a workable regulatory framework. Where any one of those three is missing, growth tends to stall — regardless of how attractive the underlying economics look on paper. For both EPC developers and C&I consumers, this is exactly why state-level regulation deserves just as much attention as module efficiency or plant capacity when a project is being planned.
Rapid market growth can create a misleading impression — that any business can simply opt into open access solar and watch its electricity bill drop overnight. The reality is more nuanced than that.
Project economics can be shaped by a long list of variables: transmission and wheeling charges, cross-subsidy surcharge, additional surcharge where applicable, banking rules and charges, scheduling requirements, state-specific open access regulations, grid availability, project financing structure, the renewable procurement model chosen, and captive or group-captive compliance requirements. These variables shift meaningfully from state to state, sometimes even within the same state over time.
That's why businesses should evaluate open access based on landed electricity cost, not just the headline solar generation tariff. A tariff that looks attractive at the point of generation can look very different once applicable network charges and regulatory costs are layered on top. The best project, in other words, isn't necessarily the one quoting the cheapest solar tariff — it's the one delivering the strongest long-term commercial outcome with manageable risk.
As the market matures, industrial buyers need to evaluate EPC partners on far more than upfront project cost. A genuinely strong C&I solar EPC partner should bring together several capabilities at once:
Detailed engineering. The plant should be designed around real site conditions, actual energy yield potential, and long-term reliability — not a standard layout recycled from a previous project.
Quality-focused procurement. Modules, inverters, mounting structures, cables, transformers, and balance-of-system components all need to work together as one integrated plant, not a collection of individually sourced parts.
Execution discipline. Civil, mechanical, and electrical activities need to follow a structured schedule with clear quality and safety controls throughout.
Grid and commissioning readiness. Protection systems, evacuation infrastructure, testing, and synchronization all need to be addressed well ahead of the final commissioning stage — not scrambled together at the last moment.
Performance-focused thinking. A solar plant is expected to run for decades. Engineering decisions should account for degradation, maintainability, downtime, and lifecycle performance from the outset — not just commissioning-day output.
O&M planning. Operations and maintenance shouldn't begin as an afterthought once construction wraps up. Good EPC execution makes a plant easier to inspect, maintain, troubleshoot, and operate for the rest of its working life.
India added a record 27 GW of total solar capacity in H1 2026 — a 49% year-on-year increase — and industry research specifically identified the open access segment as a key contributor to that large-scale build-out, driven by strong C&I demand.
That connection matters. More businesses wanting renewable power translates directly into more projects. More projects mean greater demand for land, transmission infrastructure, equipment, and skilled execution capacity. And greater scale makes engineering discipline more important, not less.
India doesn't simply need more installed solar capacity. It needs solar assets that keep performing reliably long after they're commissioned. That's precisely where capable, experienced solar EPC companies have their biggest role left to play.
For an industrial business, the move to solar shouldn't create a new operational headache. It should solve an existing energy challenge.
At Rayzon Green, our approach to Solar Engineering, Procurement, and Construction is built around end-to-end project execution, with a focus on ground-mounted and industrial-scale open access projects. From site assessment and system design through procurement, installation, testing, and activation, the objective is to manage the project as one connected process — not a collection of disconnected handoffs between vendors. Our portfolio reflects that focus: comprehensive solar EPC solutions built for commercial, industrial, and large-scale requirements.
For any C&I consumer exploring open access, the conversation should always start with the business itself, not the plant:
Once those questions have real answers, engineering can begin with a clear purpose instead of a generic template.
The first half of 2026 has made one thing unmistakable: commercial and industrial demand for renewable electricity is no longer a niche market. Nearly 6 GW of open access capacity added in six months demonstrates the sheer scale of business interest. But the next phase of growth will depend on more than demand alone.
Stable state regulations, adequate transmission infrastructure, predictable open access charges, resilient domestic supply chains, and disciplined project execution will all shape how quickly this next chapter unfolds. For businesses, that means 2026 could be an especially good time to reassess energy procurement — particularly for companies facing high grid tariffs, limited rooftop space, or ambitious renewable-energy targets they haven't yet found a realistic path to meet.
For the solar EPC industry, it means responsibility is expanding right alongside the opportunity. The market now needs EPC partners who can translate renewable-energy ambition into infrastructure that actually performs — reliably, and for decades.
A 42% year-on-year increase in new solar open access installations during H1 2026 is more than an impressive growth statistic. It's evidence of a deeper shift underway in India's C&I energy market.
Businesses are no longer asking whether solar belongs in their energy mix. Increasingly, they're asking which solar model gives them the right combination of savings, scalability, reliability, and long-term control.
For large energy consumers, open access can extend renewable adoption far beyond the physical limits of a factory rooftop. But realizing that potential takes sound commercial planning, real regulatory understanding, and technically strong solar EPC execution — not just an eagerness to go solar.
As India's open access market continues to mature, the businesses that pair the right procurement model with the right EPC strategy will be the ones best positioned to turn renewable electricity into a genuine, long-term competitive advantage. At Rayzon Green, we remain focused on building reliable, performance-driven solar infrastructure for businesses ready to make that transition.
Solar open access allows eligible electricity consumers to purchase solar power generated at an off-site project and receive that electricity through the existing transmission and distribution network, subject to applicable state regulations and charges.
India added nearly 6 GW of solar open access capacity during the first half of 2026 - approximately 42% higher year-on-year than the roughly 4 GW installed during the same period in 2025.
India's cumulative installed solar open access capacity reached approximately 36 GW by June 2026
It allows companies with large electricity requirements, or insufficient rooftop space, to source renewable electricity from larger off-site solar projects. Depending on the project structure and applicable regulations, it can meaningfully support both energy-cost management and corporate sustainability goals.
A solar EPC company handles the engineering, procurement, and construction required to turn a planned solar project into an operational generating asset — including system design, equipment procurement, civil and electrical works, evacuation infrastructure, testing, commissioning, and lifecycle-focused plant planning.
Neither model is automatically better. Rooftop solar can be highly effective wherever suitable space is available and electricity is consumed on-site. Open access tends to be more attractive for businesses whose energy requirements exceed their available rooftop capacity. Many companies end up benefiting from combining both approaches.
As of June 2026, Karnataka held the largest share of cumulative open access solar capacity at approximately 21%, followed by Rajasthan and Maharashtra at around 16% each.
