Solar EPC vs Solar IPP — Which Is Right for You?

Quick answer: with solar EPC you invest in and own the solar plant — an EPC contractor like Alpha Devraj designs and builds it for you, and all the generated power and savings are yours. With solar IPP, the developer builds, owns and operates the plant and sells you electricity through a long-term Power Purchase Agreement (PPA) — you invest nothing upfront and simply pay a lower tariff for the power you use.

Side-by-side comparison

Factor	Solar EPC (you own)	Solar IPP / PPA (developer owns)
Capital investment	You fund the plant (directly or via loan)	Zero — the IPP finances everything
Ownership	Asset on your balance sheet; depreciation benefits	The IPP owns the asset
Electricity cost	Near-zero marginal cost after payback (typically 3–5 years)	Fixed PPA tariff, usually below the grid tariff from day one
Maintenance	Your responsibility (usually via an O&M contract)	Included — the IPP operates and maintains the plant
Contract	One-time construction contract + optional O&M	Long-term PPA, typically 10–25 years
Savings potential	Highest over the plant’s 25-year life	Moderate but immediate and risk-free
Best for	Businesses with capital (or financing) wanting maximum returns and tax benefits	Businesses that want clean-power savings without capex or operational involvement

When solar EPC is the right choice

You have capital available or access to project financing.
You want the maximum lifetime savings — after the 3–5 year payback, electricity is effectively free for 20+ more years.
You can use accelerated depreciation and other tax benefits of owning the asset.
You want full control of the asset and its generation.

When solar IPP is the right choice

You prefer zero capital expenditure and no debt on your balance sheet.
You want immediate savings — PPA tariffs are typically below industrial grid tariffs from the first unit.
You don’t want operational responsibility — the IPP handles everything.
Your energy demand is large and steady enough to commit to a long-term PPA.

Can you combine both?

Yes. Many businesses own a rooftop system (EPC) sized for their base load and buy additional renewable power from an IPP via open access or group-captive arrangements. Alpha Devraj provides solar EPC, solar IPP and wind-solar hybrid models, and can model which mix delivers the best economics for your load profile.

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Frequently Asked Questions

Which is cheaper: solar EPC or IPP?

IPP is cheaper on day one (zero capex, tariff below the grid rate). EPC is cheaper over the long run — after the typical 3–5 year payback you generate power at near-zero marginal cost for the remaining 20+ years of plant life.

Can I switch from a PPA to owning the plant later?

Many PPAs include buy-out clauses that let you purchase the plant at a pre-agreed value after a lock-in period. Ask for the buy-out schedule before signing.

What is a group captive solar arrangement?

A structure where consumers hold at least 26% equity in the plant and consume at least 51% of its power, qualifying it as captive generation — which reduces open-access charges and can combine benefits of both EPC and IPP models.

How long is a typical solar PPA in India?

Most solar PPAs run 10–25 years. Longer tenures generally mean lower tariffs, since the developer recovers the investment over more years.

Solar EPC vs Solar IPP: Which Model Is Right for You?