For an industrial company trying to cut electricity costs, the first solar question often sounds simple: Should we buy renewable power from an IPP or invest in captive solar?
There isn’t one correct answer.
The better model depends on your power demand, appetite for investment, operating locations and how much responsibility you actually want to take on.
What Does the IPP Model Look Like?
Independent power producers in India develop, own and operate generation assets, then sell electricity to buyers through power purchase agreements.
For an industrial consumer, the attraction is straightforward. You can access renewable electricity without building and owning the entire plant yourself.
Less capital tied up. Less operational involvement.
An IPP typically takes responsibility for development, construction and plant performance, while the industrial buyer pays for electricity under the agreed commercial structure.
But check the landed power cost, not simply the solar tariff quoted in a presentation. Transmission, wheeling, banking and other open-access charges can change the economics, and these can vary by state.
That detail matters more than it first appears.
Captive Solar Gives You More Control
With a captive Industrial Solar Power Plant, the consuming business has an ownership interest in the generating asset.
Under India's captive-generation rules, captive users generally need to collectively hold at least 26% ownership and consume at least 51% of the electricity generated annually. The Electricity (Amendment) Rules, 2026 further clarified how captive consumption is assessed for certain Association of Persons structures.
Why go through that extra complexity?
Economics and control.
If your plant has predictable, large electricity demand, captive solar can offer attractive long-term power costs. You also have greater visibility over where the power comes from and how the asset is managed.
The trade-off is obvious: investment, compliance and long-term commitment.
What We See in Real Projects
A recurring pattern in industrial solar projects is that the lowest quoted tariff doesn't always produce the lowest electricity bill.
Imagine two factories. One operates continuously with stable daytime demand and has capital available. Captive solar may fit naturally.
Another manufacturer wants renewable energy but prefers deploying its cash into production capacity rather than a power asset. An IPP arrangement can make far more sense.
Same solar panels. Very different business decision.
KPI Green Energy Shows Why Both Models Exist
KPI Green Energy is a useful real-world example because the company operates across both IPP and Captive Power Producer (CPP) segments.
KP Group describes its Khavda development as its largest project across IPP and CPP segments, with 2,022 MWp of solar capacity associated with the development.
That tells you something useful: even at scale, there is no single renewable procurement model that suits every customer.
So, Which Should Your Industry Choose?
Choose an IPP model when you want lower upfront investment, simpler asset ownership and predictable power procurement.
Consider captive solar when your electricity demand is large and stable, you can commit capital, and long-term control over energy costs matters more.
Before deciding, model both options over the project life- not just year one.
For industries comparing independent power producers in India with an Industrial Solar Power Plant, that one exercise usually makes the answer much clearer.
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