PV export valorization regimes and BESS mechanisms (France).
What PV export is paid, when the battery can charge from the grid, and what additional revenues are possible, regime by regime.
The battery dispatch mode ("Optimized" = price arbitrage, grid charging allowed; or "Simple rule" = charge from PV surplus only) is an independent choice from the regime, except for S21 / EDF OA, where the two must stay consistent.
PV export valorization regimes
| Regime | Export remuneration | Cap / limit | BESS charging from grid | Point of attention |
|---|---|---|---|---|
| No resale, individual self-consumption | None, surplus curtailed | Export = 0 | As per chosen mode | — |
| S21 / EDF OA, regulated tariff, ≤ 100 kWp | Fixed guaranteed tariff (€/MWh), independent of spot price | None | Not in practice | "Optimized" mode (grid charging) is discouraged with this regime. Prefer "Simple rule" |
| CRE tender, contract for difference (Simplified, Ground/Rooftop)New | Spot price + indicative regulatory premium | Annual franchise of uncompensated negative-price hours (threshold under review by the CRE); reduced premium beyond it | Yes, arbitrage | Different from S21: the producer remains market-exposed. Storing rather than exporting during negative-price hours preserves the premium. Exact thresholds vary by tender: check the specific call for tenders. |
| Merchant, > 100 kWp, PPA / aggregator | Spot price × negotiated discount | None | As per chosen mode | — |
Ancillary services and complementary mechanisms
Two distinct logics: external revenue (a third party pays you) or savings on the client's own bill (you pay less). Each mechanism activates independently of the others.
| Mechanism | Revenue nature | Co-optimized hour by hour? | Key parameter | Limit / assumed simplification |
|---|---|---|---|---|
| FCR · primary reserve | External revenue | Yes | Capacity price (€/MW/h), holding duration | Variable reservation hour by hour (theoretical optimum). Real markets often require a fixed-power commitment over a time block |
| Demand response | External revenue | No, annual statistic | Sheddable capacity (MW), expected activations/year | Theoretical maximum potential. Real revenue around 50% of this figure is possible in some years |
| Peak shaving | Savings on own bill | Yes | Demand charge tariff (€/kW/month) | — |
| TURPE 7 · injection-offtake network component, since August 2026New | Savings on own bill | Yes, via reduced import price | Connection zone (injection or offtake), time window, reduction (€/MWh) | Only applies to grid zones identified by the CRE/RTE/Enedis as "injection zones". Eligible-zone list published by the CRE (deliberation No. 2025-227), to verify site by site before costing |
| Capacity mechanism · grid operator, PP1 hoursNew | External revenue | No, annual statistic | Certified capacity (MW), assumed availability rate (%) | Real certification of a hybrid PV+BESS asset requires a complex grid-operator methodology, approximated here by an indicative availability rate over PP1 hours (7am-3pm, 6pm-8pm). Reform underway: from November 2026, the mechanism shifts from a supplier capacity obligation to a tax based on consumption during peak-tension hours. Check the impact before costing. |
Simplified, educational overview, non-exhaustive and not constituting legal advice. Framework verified at publication date (see sources below). To be confirmed with our team before any investment decision. All premium, tariff and market price values are indicative.
Sources
- CRE · Deliberation No. 2025-78 of 13 March 2025 (TURPE 7 HTA-BT)
- CRE · TURPE 7, zones eligible for the injection-offtake component
- CRE · Contract-for-difference and negative-price handling (PV tenders)
- RTE · Capacity mechanism, PP1/PP2 days and hours
- photovoltaique.info · S21 feed-in tariff / EDF OA purchase obligation
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