How Can a C&I Business Switch to Renewable Energy in India? A Step-by-Step Guide

For a commercial or industrial business, switching to renewable energy can look deceptively simple.

The headline sounds straightforward: replace expensive grid electricity with cheaper solar power.

In practice, however, the decision involves much more than choosing a solar developer.

A C&I buyer needs to understand its electricity consumption, determine eligibility, choose the right procurement structure, compare the true landed cost of renewable power, evaluate generators, negotiate a long-term Power Purchase Agreement (PPA), navigate state-level open-access regulations, arrange connectivity and metering, and then monitor the project for years after the contract is signed.

That complexity is one reason why, despite the economics being increasingly attractive, most of India's commercial and industrial electricity demand still comes from the grid.

The good news is that the process becomes much easier when broken into clear steps.

This guide explains the journey from "We are considering renewable energy" to "Renewable power is now flowing to our business."

First, why are C&I businesses switching to renewable energy?

The basic economic case is compelling.

Commercial and industrial consumers often pay substantially more for electricity than the cost at which renewable power can be procured through the appropriate structure. Industrial and commercial grid tariffs typically run ₹6–15 per unit, while landed open-access solar can typically fall in the ₹4–6.5 per unit range, depending on the state, consumer profile and contract structure.

That difference can create significant savings over the life of a renewable energy contract.

But cost is no longer the only reason businesses are looking at renewable power.

Large consumers are increasingly dealing with renewable-energy targets, sustainability commitments, investor expectations, emissions reporting and the need to manage long-term electricity costs.

For some businesses, renewable procurement is therefore becoming a combination of:

• Cost reduction
• Long-term tariff visibility
• Renewable-energy compliance
• ESG and sustainability objectives
• Carbon reduction
• Energy procurement strategy

India's Green Open Access Rules, 2022 also expanded the potential addressable market by lowering the minimum eligible load for green open access from 1 MW to 100 kW, although actual implementation and requirements remain state-specific.

So the question for a C&I business is increasingly not simply whether renewable energy makes sense.

It is:

How do we switch without getting the economics, contract or execution wrong?

Step 1: Start with your electricity consumption

Before speaking to a solar generator, understand what your business actually consumes.

This is the foundation of the entire renewable procurement exercise.

At a minimum, a C&I buyer should collect:

Your electricity bills

Look at the previous 12 months, and preferably longer.

You want to understand:

• Monthly consumption
• Monthly electricity cost
• Average tariff
• Demand charges
• Contracted or sanctioned load
• Voltage level
• Peak and off-peak consumption
• Existing renewable-energy procurement
• Any major seasonal variations

A single monthly electricity bill does not tell a generator enough about your business.

A year of consumption data begins to show the shape of your demand.

Your load profile

Two businesses can consume exactly the same number of units annually and still have very different renewable requirements.

A factory operating heavily during daylight hours may be able to absorb a significant amount of solar generation directly.

A facility operating primarily at night has a different problem.

This is why annual consumption alone should never determine the size of a renewable-energy contract.

The question is not only:

"How many units do we consume?"

It is also:

"When do we consume them?"

Your future plans

A renewable PPA can run for 15–25 years.

That means today's electricity requirement cannot be considered in isolation.

Ask:

• Is the facility expanding?
• Are new production lines planned?
• Could the business relocate?
• Is another facility likely to be added?
• Could electricity consumption materially increase or decrease?
• Is the current facility expected to operate for the full contract period?

The more accurately you understand your future demand, the better you can structure the renewable contract.

Step 2: Check whether your business is eligible

Once you understand your electricity consumption, the next question is regulatory:

Can your business actually procure renewable electricity through the structure you are considering?

India's Green Open Access framework lowered the minimum eligible load to 100 kW, opening the door to a much broader group of commercial and industrial consumers.

But eligibility is not simply a national yes-or-no question.

Electricity is a state-regulated business, and open-access implementation involves state-level regulations, procedures, charges and approvals.

Your location matters.

The relevant state authorities, DISCOM arrangements, transmission system, charges and banking provisions all need to be examined before a project is commercially committed.

This is why a renewable proposal that looks attractive on paper in one state may look very different in another.

Step 3: Choose the right renewable procurement model

There is no single way for a C&I business to switch to renewable energy.

The two broad routes are rooftop solar and off-site/open-access renewable power.

Option 1: Rooftop solar

Rooftop solar is installed directly at your facility.

The electricity is generated where it is consumed, which makes the model relatively straightforward from a power-flow perspective.

But rooftop has an obvious limitation:

Your renewable capacity is constrained by the amount of suitable roof or land available.

For a small office, warehouse or commercial building, that may be enough.

For a large industrial facility consuming millions of units of electricity every year, the roof may only cover a fraction of total demand.

Option 2: Open-access renewable power

Open access allows an eligible C&I consumer to procure electricity from a renewable generator located elsewhere and use the grid to deliver that electricity to its facility.

This dramatically expands the amount of renewable capacity a business can access.

Instead of asking:

"How much solar can I fit on my roof?"

the question becomes:

"How much renewable electricity should I procure for my load?"

But open access also introduces additional complexity.

The electricity has to travel through the grid, and the economics therefore need to account for items such as:

• Wheeling charges
• Transmission charges
• Distribution charges/losses
• Cross-subsidy surcharge
• Additional surcharge, where applicable
• Banking provisions and charges
• State-specific regulatory requirements

The headline generation tariff is therefore not the same thing as the price the C&I consumer ultimately pays.

The number that matters is the landed cost of renewable electricity.

Step 4: Decide between third-party, captive and group-captive structures

Once open access is being considered, another important decision is the structure through which the renewable power will be procured.

Broadly, a C&I buyer may evaluate:

Third-party open access

The consumer purchases renewable electricity from an independent generator through a PPA.

The buyer does not necessarily own the generating asset.

This can be operationally simpler, but the applicable charges and economics need to be evaluated carefully.

Captive

The consumer has an ownership interest in the generating project and consumes the required proportion of its generation under the applicable captive framework.

Group captive

Multiple consumers participate in ownership of the generating project and consume power according to the applicable structure.

Group-captive models have become an important part of India's C&I renewable market because the structure can provide access to certain regulatory and surcharge treatment when the applicable ownership and consumption requirements are satisfied.

However, captive and group-captive structures can also introduce additional legal, financial and governance complexity.

The right answer therefore depends on the buyer's:

• Electricity consumption
• Location
• Desired renewable share
• Investment appetite
• Contract horizon
• Risk tolerance
• State-level charges and regulations

This is not a decision that should be made simply because one structure has a lower advertised tariff.

The complete landed economics and obligations need to be compared.

Step 5: Calculate the real cost of renewable power

This is where many renewable-energy evaluations go wrong.

A generator may quote a solar tariff that looks dramatically cheaper than your current DISCOM tariff.

But that tariff is only one part of the equation.

Suppose a generator quotes a renewable tariff of ₹3.50 per unit.

That does not necessarily mean your business will pay ₹3.50 per unit for delivered renewable electricity.

Depending on the structure and state, you may need to account for:

Generation tariff

The amount paid to the renewable generator for the electricity generated.

Wheeling charges

The cost of using the electricity network to transport electricity from the generating project to your facility.

Transmission charges

Where applicable, the cost associated with transmission through the relevant network.

Transmission and distribution losses

Some energy is lost while electricity moves through the network. The applicable treatment affects the number of units ultimately available to the consumer.

Cross-subsidy surcharge

A charge that can apply to open-access consumers and compensates the DISCOM for revenue associated with the consumer's previous tariff structure.

Additional surcharge

An additional charge that may apply in certain circumstances and states to account for stranded fixed costs of the distribution utility.

Banking

Where permitted, banking allows surplus renewable generation to be accounted for and drawn against consumption at another time, subject to state-specific rules and charges.

The result is the number that actually matters:

Landed renewable-energy cost

This is the number that should be compared against the true cost of continuing to buy electricity from the grid.

A good renewable procurement decision therefore starts with a simple comparison:

Current effective grid cost vs. projected landed renewable cost

not merely:

DISCOM tariff vs. solar generation tariff.

Step 6: Decide how much renewable power to procure

Once you know your economics, you need to determine the appropriate renewable capacity.

This is more complicated than simply trying to replace 100% of your electricity consumption with solar.

Solar generation varies throughout the day and across the year.

Your facility's demand varies too.

The right renewable capacity therefore depends on:

• Annual electricity consumption
• Hourly or monthly load profile
• Solar resource
• Expected plant generation
• Capacity utilisation factor
• Banking rules
• Grid requirements
• Contract structure
• Desired renewable percentage

The objective should be to find the point where the renewable project provides meaningful savings and renewable coverage without creating unnecessary exposure to excess generation, regulatory constraints or contractual obligations.

In other words:

The biggest possible solar contract is not necessarily the best solar contract.

Step 7: Find the right renewable generator

Now comes one of the most important parts of the process.

You need a generator.

And this is where the C&I market becomes difficult.

There may be multiple developers capable of supplying renewable power to your business, but there is rarely a simple marketplace where every buyer can see comparable offers from multiple vetted generators.

Traditionally, a C&I buyer might:

• Find a developer through an existing relationship.
• Request a proposal.
• Negotiate the tariff.
• Evaluate the developer.
• Ask lawyers to review the PPA.
• Conduct financial and technical diligence.
• Compare it against another proposal.
• Repeat the process.

The problem is that the buyer may never know whether the first quote was actually competitive.

That creates a price-discovery problem.

Step 8: Don't choose the generator on price alone

The cheapest renewable-energy bid is not automatically the best deal.

You are potentially entering into a relationship that could last 15–25 years.

That means the generator's ability to deliver matters almost as much as the tariff.

At minimum, evaluate:

Technical capability

• Project experience
• Technology
• Plant quality
• Engineering capability
• Expected generation
• Operations and maintenance capability

Financial strength

• Balance sheet
• Financing arrangements
• Existing project obligations
• Ability to fund construction
• Long-term ability to operate the project

Delivery track record

• Projects already commissioned
• Delays in previous projects
• Grid connectivity experience
• Historical generation performance

Contractual protection

• Generation guarantees
• Performance security
• Default mechanisms
• Penalties
• Termination rights

The key principle is simple:

A renewable PPA is not just a price contract. It is a long-term delivery relationship.

Step 9: Compare multiple offers properly

If you receive five proposals, you should not simply arrange them from lowest tariff to highest tariff.

The comparison needs to be standardised. For example:

This is the kind of comparison that gives a CFO or procurement team confidence that they are making an informed decision.

A lower tariff with weak performance protection may ultimately be more expensive than a slightly higher tariff from a financially stronger generator.

Step 10: Understand the Power Purchase Agreement

The PPA is one of the most important documents in the entire process.

It defines the commercial relationship between the buyer and generator.

A typical solar PPA can run for 15–25 years, so this is not a contract that should be reviewed like an ordinary annual vendor agreement.

The buyer should understand:

Tariff

What exactly will the buyer pay per unit?

Term

How long is the commitment?

Escalation

Does the tariff remain fixed, or does it increase annually?

Generation commitment

What level of generation is the generator expected to deliver?

Performance guarantees

What happens if actual generation falls below the agreed level?

Payment terms

When and how does the buyer pay?

Security

What performance security or other protection does the generator provide?

Default

What constitutes a default by either party?

Termination

Under what circumstances can the contract be terminated?

Force majeure

What happens if circumstances outside either party's control affect performance?

Change in law

What happens if government regulations, taxes, charges or open-access rules change?

Transfer and restructuring

What happens if the buyer sells the facility, relocates, restructures or changes its electricity requirement?

These provisions matter because a renewable PPA can outlive management teams, business plans and even the original assumptions under which it was signed.

Step 11: Complete the open-access and connectivity process

Once the commercial agreement is in place, the project still needs to move through the relevant regulatory and grid process.

The general process can include:

1. Connectivity and eligibility assessment

Confirm that the consumer and generating project meet the relevant requirements.

2. Open-access application

The necessary application is submitted to the relevant authorities.

3. Regulatory review

The applicable state-level process determines the relevant approvals, charges and arrangements.

4. Wheeling and transmission arrangements

The agreements necessary to transport electricity through the grid are established.

5. Banking arrangements

Where applicable, the permitted banking mechanism and associated terms are established.

6. Metering

The required metering infrastructure is installed and approved.

7. Commissioning

Once the renewable plant is ready and the relevant approvals are in place, electricity can begin flowing under the agreed arrangement.

The exact process, documentation and timelines vary by state.

That state-by-state variation is one of the biggest reasons why renewable procurement cannot be treated as a purely commercial transaction.

Step 12: Commissioning is not the finish line

A common mistake is to think that the renewable project is "done" once the PPA is signed.

It isn't.

The real relationship starts when electricity begins flowing.

The buyer now needs to monitor:

• Actual generation
• Contracted generation
• Metered units
• Billing
• Payment reconciliation
• Performance guarantees
• Regulatory compliance
• Banking
• Open-access charges
• Contractual obligations

If generation falls below the contracted level, someone needs to identify the shortfall and enforce whatever remedy the PPA provides.

If state regulations change, someone needs to understand the impact.

If a generator misses an obligation, someone needs to follow up.

This is particularly important because the contract can remain active for 15–25 years.

Step 13: Keep evaluating your renewable portfolio

Renewable procurement should not be treated as a one-time purchasing decision.

Your electricity demand will change.

Your business may expand.

Your state regulations may change.

Your grid tariff may change.

Your sustainability targets may change.

New renewable technologies may become commercially attractive.

Your original renewable contract may eventually become only one component of a broader energy strategy.

A C&I business should therefore periodically review:

• Renewable share
• Cost savings
• Generator performance
• Contract compliance
• Grid dependence
• Future capacity requirements
• RCO obligations
• Sustainability reporting
• Carbon opportunities

The objective is to turn renewable procurement from a one-off project into an ongoing energy-management strategy.

So, how long does the entire process take?

There is no single timeline that applies to every C&I buyer.

It depends on:

• State
• Consumer size
• Renewable structure
• Generator readiness
• Connectivity
• Regulatory approvals
• Project development status
• Metering
• Contract negotiations

A buyer with an existing, commissioned renewable project and a relatively straightforward structure may have a very different journey from a buyer developing a new project specifically for its requirements.

This is why project readiness matters as much as the tariff.

A very attractive tariff is not useful if the project cannot deliver power when your business needs it.

The biggest mistake: treating renewable procurement like buying a commodity

The electricity itself is a commodity.

The procurement process isn't.

A C&I buyer isn't simply buying solar panels or units of electricity.

It is making a long-term decision involving:

Energy economics + regulation + infrastructure + finance + contracts + project risk.

That is why businesses without dedicated energy teams often find the process difficult.

They may understand that renewable power is cheaper.

They may even know that open access exists.

But moving from that understanding to an actual, bankable, long-term renewable contract requires expertise across several different areas.

Where Wattmatch fits into the process

This is the gap Wattmatch is designed to address.

The traditional C&I renewable market often leaves the buyer to manage the entire process independently:

Find a generator → request a quote → compare prices → conduct diligence → negotiate PPA → manage approvals → monitor performance.

Wattmatch is designed to turn that into a structured marketplace.

A C&I buyer submits its requirement, including its location, load profile and renewable-energy needs.

Verified generators then compete for that demand through a structured auction.

The offers can be benchmarked not just on tariff, but also on technical and financial credibility.

The buyer receives a standardised, pre-vetted contractual framework rather than having to negotiate every PPA from scratch.

And the relationship doesn't end at signing.

Wattmatch's model includes ongoing performance monitoring, contract management, compliance tracking and payment/escrow administration.

In simple terms:

Without a structured platform

Buyer → Find generator → Negotiate → Vet → Contract → Manage

With Wattmatch

Buyer → Submit requirement → Vetted generators compete → Compare → Match → Contract → Managed delivery

The purpose isn't to make renewable energy sound complicated.

It is the opposite.

The purpose is to take the complexity that already exists and keep it away from the C&I buyer.

The renewable switch, in one view

For a C&I business considering renewable energy, the journey can be summarised in ten questions:

1. What do we consume?

Understand your electricity bills, load and demand profile.

2. Are we eligible?

Check your load, location and applicable open-access rules.

3. What structure works for us?

Evaluate rooftop, open access, captive and group-captive options.

4. What will renewable power really cost?

Calculate the landed cost, including applicable charges and losses.

5. How much renewable power do we need?

Match renewable capacity to your actual consumption and future requirements.

6. Who can reliably supply it?

Evaluate generators on technical, financial and delivery capability.

7. Are we getting a competitive price?

Compare multiple offers on a standardised basis.

8. What exactly are we signing?

Understand the PPA, guarantees, escalation, term, default and termination provisions.

9. Can the project actually deliver?

Complete connectivity, regulatory, metering and commissioning requirements.

10. Who manages it for the next 15–25 years?

Monitor generation, billing, compliance and contract performance continuously.

Renewable energy is cheaper. Switching shouldn't be harder.

India's C&I renewable opportunity has grown rapidly because the fundamental equation works.

Businesses want lower electricity costs.

Generators want long-term offtake.

India needs more renewable capacity.

And policy is increasingly pushing large consumers toward renewable consumption.

The remaining challenge is making the transaction itself easier.

A C&I business should not need to become an electricity-market expert just to secure a competitive renewable-energy contract.

It should be able to understand its options, compare credible generators, see a transparent price, sign a contract it understands, and know that someone is monitoring delivery after the deal is done.

That is ultimately what a more mature C&I renewable market should look like.

Renewable energy should be easy to buy, even when the underlying electricity market isn't.

Thinking about switching your business to renewable energy?

Tell Wattmatch about your electricity load and requirements. We'll help you understand the available options and connect you with vetted renewable generators competing for your demand.

Run your business. We'll run your renewables.