- Central CFA and a state top-up can stack on one rooftop system.
- Where the central residential subsidy needs DCR, the stacked state amount usually needs the same DCR modules.
- ALMM List-I alone is not DCR proof — you need a DCR certificate from NISE.
- Non-DCR modules fit many C&I and open-access jobs without subsidy.
- A wrong module on a DCR job risks a clawback and blacklisting.
- State amounts and DCR clauses are point-in-time — verify per state.
Stacking a state subsidy on top of the central CFA is how many residential solar deals get affordable for the customer. But the moment a subsidy needs DCR modules, your whole BOM and paperwork must follow. Get the module choice wrong and the agency can claw the money back.
What subsidy stacking means
Subsidy stacking means two separate subsidies apply to the same rooftop system and both reduce the customer's cost. The most common pair is the central CFA under PM Surya Ghar and a state top-up that some states add on top. Together they cut the price the homeowner pays.
For an EPC, stacking is mostly a paperwork and module-choice question. The deeper the subsidy, the more rules ride along — and the biggest of those rules is whether the modules must be DCR (Domestic Content Requirement). Get the module class right once and both claims line up.
Central CFA versus state top-up
The central CFA and the state top-up are two different pots of money with two different owners, even though they land on the same bill.
The central CFA
The central CFA (central financial assistance) is the national PM Surya Ghar subsidy, paid by the central government against residential rooftop systems. Its slabs and rules are set centrally. For residential subsidy, it generally requires DCR modules. Our guide on the PM Surya Ghar DCR requirement covers that condition in detail. Confirm the live rule in the current order.
The state top-up
A state top-up is an extra subsidy some states add to attract more rooftop installs. It is funded by the state, not the centre. Because it usually sits on top of the central CFA, it generally follows the same module rules — including DCR. Some states also write their own domestic-content clause. The CFA versus state top-up guide in the PM Surya Ghar hub shows how the two combine.
Where DCR becomes mandatory
DCR becomes mandatory wherever the scheme funding the project requires domestic content — and for residential subsidy, that is the common case. DCR means the module and its cells are made in India, proven by a DCR certificate.
The key trap: ALMM List-I enlistment is not DCR. A module can be on List-I and still be non-DCR, because it uses imported cells. For a DCR-required subsidy you need a module that is both enlisted and DCR-certified, with a DCR certificate from the NISE DCR portal. Where there is no subsidy, such as many C&I jobs, non-DCR modules are usually fine — though net metering still needs ALMM List-I.
Stacking decision table
Use this table to decide whether your job needs DCR before you pick modules. Every DCR condition is point-in-time — verify the current state top-up amounts and any DCR clauses per state before you quote.
Source: MNRE / PM Surya Ghar scheme rules and state policies, read at a point in time. State top-up amounts and DCR conditions change — confirm against the current state policy and MNRE order before publish.
How to build the stacked quote
Build the stacked quote in a fixed order so the numbers and the module class never drift apart. The order matters because the module choice depends on the subsidy, not the other way round.
- Confirm the subsidy path — central CFA only, or CFA plus a state top-up for this customer's state.
- Decide DCR or non-DCR — if any stacked subsidy needs DCR, the whole system uses DCR modules.
- Pick enlisted modules — DCR-certified and on ALMM List-I for that exact model.
- Apply both subsidies — central CFA slab plus the state amount, then the customer share.
- Attach the proof — DCR certificate, module serials and invoice, all matching.
Reflecting the right module class in the quote from the start avoids a painful re-quote later. See DCR vs non-DCR panels for how the two differ on price and use.
Common stacking mistakes
Most stacking failures are avoidable. They come from treating the state top-up as a free add-on instead of a claim with its own rules.
- Quoting non-DCR on a DCR job — the cheaper module wins the deal, then fails the claim.
- Assuming List-I means DCR — it does not; you still need the DCR certificate.
- Mismatched serials — the DCR certificate covers one batch but a different batch ships.
- Ignoring a state DCR clause — some states add conditions the central rule does not.
- Stale amounts — using last year's state top-up figure in this year's quote.
Clawback risk and how to avoid it
Clawback risk is the chance the agency recovers a paid subsidy because the installed modules did not meet the condition the claim relied on. On a DCR-required job, using non-DCR panels is the classic trigger.
The defence is a tight match between what you claimed and what you installed. Tie every module serial to the DCR certificate and the invoice. Keep the records together for both the central and state claims. Our guide on penalties, blacklisting and subsidy recovery shows what is at stake. A clawback can also pull in your firm's rating, so the cost is more than the money returned.
How SuryaHub helps you stack subsidies cleanly
Stacking is where a small quoting slip becomes a recovery notice months later. SuryaHub builds the central CFA, the state top-up and the customer share into one quote, and ties the DCR certificate and module serials to the claim in government workflows. If a non-DCR module lands on a DCR-required job, it flags before you order. SuryaHub is pre-revenue; real pilots are Suryantra Energy and RGESPL, and subsidy amounts here are scheme facts to verify, not promises.
Stack subsidies without a clawback
See how SuryaHub ties DCR proof to every stacked subsidy claim.
Related guides
Frequently asked questions
Do state solar subsidies require DCR modules?+
State solar subsidies often require DCR modules when they sit on top of the central CFA, because the state top-up follows the central rule. Some states also add their own domestic-content clause. Always check the live state policy and the central order, because DCR conditions are point-in-time and change.
What is CFA stacking with a state subsidy?+
CFA stacking is when a central financial assistance subsidy and a state top-up subsidy both apply to the same rooftop system. The two amounts add up to reduce the customer cost. Where the central CFA needs DCR modules, the stacked state amount usually needs the same DCR modules and the same DCR certificate.
Can I use non-DCR modules and still claim a state subsidy?+
You usually cannot use non-DCR modules where the subsidy requires domestic content, such as the residential PM Surya Ghar CFA and most state top-ups built on it. Non-DCR modules suit many C&I and open-access jobs without subsidy. Confirm the DCR condition for your exact scheme before you quote.
What proves DCR for a stacked subsidy claim?+
A DCR certificate from the NISE DCR portal proves that the module and its cells are made in India for a stacked subsidy claim. ALMM List-I enlistment alone is not DCR proof. Keep the DCR certificate, the module serials and the invoice together so both the central and state claims match.
What triggers a subsidy clawback in DCR stacking?+
A subsidy clawback is triggered when the installed modules do not meet the DCR condition the claim relied on, for example non-DCR panels used on a DCR-required job. The agency can recover the subsidy and blacklist the vendor. Match every serial to the DCR certificate to avoid this.
How does SuryaHub help with subsidy stacking?+
SuryaHub builds the central CFA, state top-up and customer share into one quote, ties the DCR certificate and module serials to the claim, and flags a non-DCR module on a DCR-required job. SuryaHub is pre-revenue; real pilots are Suryantra Energy and RGESPL, and subsidy amounts should be verified.
Sources & references
Subsidy slabs and DCR conditions come from primary government sources and change often. Confirm the current central and state rules before you quote a stacked subsidy.
- National Portal for PM Surya Ghar ↗
Central CFA slabs and the DCR condition for residential subsidy.
- Ministry of New & Renewable Energy (MNRE) ↗
Scheme guidelines, ALMM and DCR requirements.
- NISE DCR portal ↗
Domestic-content certification used to prove DCR (verify URL).
Written by the SuryaHub team · reviewed against MNRE, PM Surya Ghar & NISE sources · updated 20 June 2026.
Method: Stacking and DCR rules are taken from the government sources above and re-checked every 30 days. State top-up amounts and DCR clauses are point-in-time — verify per state. SuryaHub is pre-revenue; only Suryantra Energy and RGESPL are real pilots.
Change log: 20 Jun 2026 — first published.