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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