- RESCO: a third party owns the system; the consumer pays only for the power used.
- A ₹100 crore Payment Security Mechanism corpus de-risks RESCO and makes it financeable.
- ULA: a DISCOM/state entity installs for households, in utility-owned or consumer-owned form, over a ≥5-year project period.
- In both, CFA goes to competitively bid EPC vendors, not to individual homeowners.
- These open bid-based volume for a small/mid EPC — if you can deliver at scale with tight cost control.
For years the rooftop business meant one thing: find a homeowner, sell them a system, claim the subsidy. RESCO and Utility-Led Aggregation change that. Now a developer or a utility can own the rollout and pay an EPC to install at volume. If you are good at delivery but tired of chasing every lead, these models are worth understanding.
What RESCO and Utility-Led Aggregation are
Both are alternatives to the standard CAPEX (vendor) model, where the consumer buys and owns the system and you are their direct vendor. They move ownership and risk away from the homeowner.
In RESCO — Renewable Energy Service Company — a third party owns the system and the consumer simply pays for the power it generates, like a utility bill, with no large upfront cost. In Utility-Led Aggregation (ULA), a DISCOM or state entity aggregates demand and installs rooftop solar for households at scale.
RESCO vs ULA vs the standard CAPEX model
The cleanest way to see the difference is side by side — who owns the asset, who pays, and where the EPC sits.
RESCO and the ₹100 crore payment security mechanism
The hard part of RESCO has always been risk: the developer fronts the cost and depends on consumers paying their power bills for years. To fix that, the scheme includes a ₹100 crore Payment Security Mechanism (PSM) corpus that backstops payments to the developer if a consumer defaults.
That corpus is what makes RESCO financeable, and financeable RESCO is what creates installation contracts for EPCs. As an installer you are not the one carrying consumer-payment risk — the RESCO developer and the PSM do. You are paid to build well at volume.
Utility-Led Aggregation in detail
Under Utility-Led Aggregation, the DISCOM or a state entity drives the rollout for households. It can be structured as utility-owned (the utility owns the assets) or consumer-owned (the consumer ends up owning them), and it runs over a project period of at least five years.
Why the structure matters to you
In both structures the utility aggregates demand across many households and appoints competitively bid EPC vendors to install. For an EPC, ULA means a single large counterparty — the utility — instead of thousands of individual homeowners to find and convince. The five-year project period also signals ongoing work, not a one-off install.
How CFA is released and where an EPC plugs in
This is the key shift. Under RESCO and ULA the Central Financial Assistance (CFA) is released to competitively bid EPC vendors, not to individual homeowners as in the standard model. The money flows through the developer or utility and the bid.
So an EPC plugs in by winning the bid to install for the RESCO developer or the utility, then delivering at scale against the contract. You need to be empanelled to participate, and you need to price the bid so that thinner per-unit margins still work at volume. The work is won at the tender, not at the doorstep.
Do these models suit a small or mid EPC?
They can — with eyes open. The upside is real: bid-based opportunities let you win blocks of work without funding a big lead-generation engine, and a single utility or developer counterparty is simpler to serve than scattered homeowners. For an EPC that is strong at execution, that is attractive.
The trade-off is discipline. Bids are competitive, per-unit margins are thinner, and you must deliver volume reliably or the contract hurts you. The new MNRE operational guidelines reshape the EPC playbook around bidding, scheduling and at-scale delivery rather than one-by-one sales. A small or mid EPC that runs tight cost control and a clean process can win here; one that runs on memory and spreadsheets will struggle with the volume.
How SuryaHub helps you run bid-based volume
SuryaHub is built to run many similar jobs at once — exactly what RESCO and ULA demand. It tracks each household from allocation through install and the DISCOM and scheme steps to CFA release, so a hundred installs are as visible as one. SuryaHub is pre-revenue; real pilots are Suryantra Energy and RGESPL, and figures here are scheme facts, not guarantees.
Deliver bid-based work at scale
See how SuryaHub runs RESCO and ULA volume from allocation to CFA.
Related guides
Frequently asked questions
What is the RESCO model in PM Surya Ghar?+
In the RESCO model a third party owns the rooftop solar system and the consumer simply pays for the power it generates, with no large upfront cost. It differs from the standard CAPEX model where the consumer buys and owns the system. A ₹100 crore Payment Security Mechanism corpus de-risks RESCO developers.
What is Utility-Led Aggregation in PM Surya Ghar?+
Utility-Led Aggregation, or ULA, is where a DISCOM or state entity installs rooftop solar for households at scale, in either a utility-owned or consumer-owned structure, over a project period of at least five years. The utility aggregates demand and appoints competitively bid EPC vendors to install the systems.
What is the payment security mechanism for RESCO?+
The payment security mechanism is a ₹100 crore corpus that de-risks the RESCO model by backstopping payments to the third-party developer if a consumer defaults. It makes RESCO financeable, which is why it matters for EPCs hoping to win RESCO installation contracts under PM Surya Ghar.
How does an EPC plug into RESCO and ULA models?+
Under RESCO and Utility-Led Aggregation the central financial assistance is released to competitively bid EPC vendors rather than to individual homeowners. An EPC plugs in by winning the bid to install for the RESCO developer or the utility, then delivering at scale against the contract terms.
Do RESCO and ULA suit a small or mid-size EPC?+
RESCO and ULA can suit a small or mid EPC that can deliver volume reliably, because they open bid-based opportunities without needing to find each homeowner. The trade-off is bidding discipline, thin per-unit margins and execution at scale, so an EPC needs tight cost control and process to win profitably.
How does SuryaHub help with RESCO and ULA projects?+
SuryaHub runs bid-based RESCO and ULA work at volume — tracking each household from allocation through install, DISCOM steps and CFA release in one place. SuryaHub is pre-revenue; real pilots are Suryantra Energy and RGESPL, and figures here are scheme facts, not guarantees.
Sources & references
RESCO, ULA, the payment security mechanism and the operational guidelines come from primary government sources. Always confirm the current model rules with your DISCOM and MNRE before you bid.
- National Portal for PM Surya Ghar ↗
RESCO, Utility-Led Aggregation and the model guidelines.
- Ministry of New & Renewable Energy (MNRE) ↗
Operational guidelines for RESCO, ULA and the payment security mechanism.
- Press Information Bureau (PIB) ↗
Government announcements on the ₹100 crore payment security corpus.
Written by the SuryaHub team · reviewed against MNRE & National Portal sources · updated 19 June 2026.
Method: RESCO, ULA and the ₹100 crore PSM are taken from the government sources above and re-checked every 30 days. Model rules and figures are scheme facts, not guarantees — verify current with your DISCOM / MNRE. SuryaHub is pre-revenue; only Suryantra Energy and RGESPL are real pilots.
Change log: 19 Jun 2026 — first published.