France Solar Feed-in Tariffs: S21 Rates and Application Dates

A French solar proposal should name the contract regime and application date before showing revenue. “EDF tariff 2026” is too broad: a new rooftop application, an older S21 contract and a tender-awarded project can have different rules.

Primary-source review: September 30, 2026. This guide concerns S21 in continental metropolitan France. Non-interconnected zones, ground-mounted projects and other technologies require their own support texts. It is an editorial explanation, not an eligibility decision or a substitute for the project’s contract.

June 2026 S21 Rules: Start With the Legal Version

The June 1, 2026 amendment, published June 4 substantially revised S21. The consolidated Article 8, effective June 5, sets the purchase tariff at 1.1 c€/kWh excluding VAT, with 2% annual indexation at contract anniversaries.

Do not apply this table indiscriminately to a contract with an earlier application history. Preserve its general and particular conditions, original tariff basis and amendments. A revised law is not enough evidence to tell an existing producer that their contracted price has automatically been replaced.

The June amendment’s revised energy provision excludes injection above an annual ceiling of installed capacity multiplied by 1,600 hours from the stated purchase tariff. Confirm the current contract’s measurement boundary and cap before multiplying annual production by a rate. This is a remuneration ceiling, not a prediction of a site’s solar yield.

The CRE tariff-data page remains useful for source-dated historical tables. A downloaded table needs its covered application period and legal version; an older quarter must not be relabelled as the current offer.

Eligibility: Capacity, Site and Selling Mode

The current S21 eligibility article covers qualifying building, hangar and canopy installations under its siting and installer requirements. For installations of 9 kWc or less, the current text permits support only for vente avec injection du surplus. It does not support a new small full-injection project merely because the equipment can export electricity.

EDF OA’s S21 page identifies the important capacity transition: complete connection requests submitted before September 22, 2025 could concern installations up to 500 kWc; from that date, new requests above 100 kWc no longer qualify for S21. It points those projects toward the simplified competitive route. Read the applicable tender specification rather than assuming every larger project receives the same market premium or has the same application calendar.

Site aggregation also matters. Under Annex 3, nearby installations can count as the same site, with defined exceptions. Separating company names or meters does not by itself prove separate eligibility. Record associated installations, ownership and application dates, and obtain a project-specific assessment of power P+Q before an extension or adjacent development.

Self-Consumption Versus Full Injection

Autoconsommation avec vente du surplus uses production on site and sells the eligible surplus. Vente en totalité supplies electricity through the full-injection arrangement, subject to the relevant contract’s definition and auxiliary consumption. Both the technical wiring and the eligible commercial mode must match the application.

A financial comparison has three distinct quantities:

• Solar energy used on site, valued against the charges it actually avoids.
• Eligible injection, valued under the purchase agreement.
• Curtailed or otherwise unpaid energy, which must not receive assumed revenue.

Annual production and annual demand totals do not establish self-consumption. Use consumption and production in matching intervals, including seasonal demand and any permitted export limit. A battery adds its own cost, losses and operating conditions; it cannot be assumed to improve payback or remove a connection constraint.

For a new small system, full injection is not an eligible S21 alternative under the reviewed text. For a project that does qualify for another mode or regime, compare the actual permitted routes with the same generation and cost assumptions.

Connection and Purchase Contract: A Practical Workflow

Keep the network-access process and purchase contract linked but distinct. The current Article 4 explains how a connection application requesting purchase support can constitute the contract request; it also describes a simplified pathway for qualifying producers. Do not tell every applicant to wait until commissioning before first requesting support.

1. Establish the route. Record location, installed peak capacity, selling mode, associated site installations and responsible network operator.
2. Check the installer requirement. Confirm the qualification or certification matches the installation type and project size under the applicable annex. Do not presume one commercial label is the only accepted route.
3. Submit through the applicable official process. Retain the acknowledgement, completeness date, mandate and declared characteristics. For a simplified pathway, verify that the producer meets its technical and administrative criteria.
4. Track the connection offer. Use the actual acceptance deadline, works, costs and constraints in that offer. Keep them separate from the support completion deadline.
5. Complete required safety and conformity records. Match actual equipment, capacity and ownership to the application; report changes through the appropriate route.
6. Retain commissioning and contract documents. Check the effective date, tariff basis, indexation, supported energy and billing schedule before issuing a customer revenue forecast.

These steps are a dossier checklist, not guaranteed processing times. The previous article’s generic 15- or 18-month post-offer application deadline is not a reliable description of the reviewed rules.

Completion Deadline and Contract Duration

The current Article 5 provides a 20-year contract from commissioning, subject to the required documents and completion conditions. It uses the later of 24 months from the complete contract request and two months after network connection works finish, where the producer complied with the network requirements. It also sets out qualifying litigation extensions.

Exceeding the applicable completion date can reduce the contract duration by the overrun. That is different from a universal claim that a missed 15-month application window permanently cancels eligibility. Confirm the project’s reference date and evidence for any extension with the buyer; keep a dated milestone register instead of a generic countdown from the connection offer.

A long contract does not guarantee an installation’s production, a constant unindexed price or a predetermined return on investment.

Billing and Meter Readings

EDF OA’s billing guidance directs producers to their particular conditions for invoicing frequency. It describes manual invoicing and conditional automatic invoicing. Do not assume every producer receives monthly transfers without an invoice.

Verify the injection reading or settlement data, start and end dates, eligible energy, tariff/indexation and bank details. Preserve the underlying network records and contract reference. A retail electricity supply account and a producer’s OA account serve different purposes.

When a bill differs from the proposal, check units first: 1 c€/kWh is €0.01/kWh, while €/MWh requires division by 1,000 to obtain €/kWh. Then check the settlement period, ceiling, indexation and actual injected energy. Avoid using total inverter generation as a substitute for eligible billed injection.

Illustrative Revenue Check

Assume an eligible new project under the reviewed June 2026 terms delivers 3,000 kWh of eligible injection in its first contract year. The arithmetic is 3,000 × €0.011 = €33 excluding VAT. With the stated 2% anniversary indexation, the next rate would be €0.01122/kWh; the same eligible energy would give €33.66. These are tariff calculations, not a production forecast or an eligibility approval.

Now assume, purely for comparison, that the project uses 4,000 kWh on site and avoids an assumed €0.20/kWh energy charge. That line is €800. Combined gross energy value is €833 before operating costs, taxes, financing and other charges. The assumed retail value is not a verified universal French tariff.

No investment premium is included. Do not subtract a premium from installation cost and also add the same premium to annual savings. Do not roll a one-year energy value into a 20-year return without modelling degradation, indexation, replacements, tax and discounting. Keep source and model assumptions in a production estimate register.

VAT, Other Aid and Tax on Income

VAT on installation and tax on sale income are separate questions. Service Public’s September 2025 VAT explanation describes a 5.5% installation VAT route from October 1, 2025 for residential PV up to 9 kWp, subject to cumulative environmental, technical and energy-management requirements. Capacity alone is insufficient. Confirm the actual quotation’s eligibility and supporting equipment documentation rather than copying the old under-3-kWp 10% table.

Before combining any public aid with purchase support, check the current S21 restriction and each programme’s terms. A historic self-consumption premium schedule is not evidence that a new application earns that premium today. This guide does not publish an unverified premium amount or an automatic tax exemption on OA income. Obtain current tax guidance for the producer’s status and installation.

What the Customer Proposal Should Retain

Store the regime and version, location, completeness date, capacity P and relevant Q, mode of sale, tariff/indexation source, eligible-energy ceiling, commissioning reference, billing conditions and any approved aid. Label customer-provided information and editorial assumptions separately from buyer-confirmed contract terms.

Use solar proposal software to present the verified assumptions clearly. A software-generated document is not evidence that EDF OA accepted the tariff, that grid access is available or that the project complies with French law.

Frequently Asked Questions

What does EDF OA pay for solar electricity in France?

Use the tariff and indexation provisions of the actual contract and applicable legal version. New applications and older contracts should not share an unqualified rate table. The source-dated S21 section above explains the June 2026 text; confirm the project’s eligibility with the obligated buyer.

Is the tariff fixed when I sign the contract?

Do not use signature date alone. The complete application history and applicable support text determine the project’s tariff basis; indexation may then apply during the contract. Signing remains necessary for contractual payment, but it does not justify substituting that day’s headline tariff.

Can a small new system choose supported full injection?

Under the current S21 eligibility text, installations of 9 kWc or less qualify only in the surplus-injection mode. Earlier projects must be checked against their applicable version. A technical ability to export all production is not evidence of support eligibility.

Does every installation above 100 kWc require the same tender?

No. New S21 complete connection requests above 100 kWc ceased to qualify from September 22, 2025, but prior applications and other support procedures require separate review. Identify the exact CRE tender or simplified procedure and its current specification before assuming eligibility or a price.

Does EDF OA automatically pay monthly?

Use the billing frequency in the contract’s particular conditions. EDF OA explains that frequency varies by project and capacity. Meter readings, an active signed contract and the required invoicing process matter; monthly payment is not a universal promise.

Can the purchase tariff be combined with other aid?

Check the applicable support text and the terms of each aid before combining them. S21 restricts other public financial support for electricity production on the same installation. A VAT treatment, historical investment premium and separate renovation measure should not be treated as interchangeable grants.