PV export valorization regimes and BESS mechanisms (Spain).
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 across all Spanish frameworks below.
PV export valorization regimes
| Regime | Export remuneration | Cap / limit | BESS charging from grid | Point of attention |
|---|---|---|---|---|
| Compensación simplificada, RD 244/2019 | Spot price × compensation ratio | Capped monthly at the import bill (never a cash payment, only a deduction) | As per chosen mode | — |
| Autoconsumo puro | None, export forbidden, curtailed | Export = 0 | As per chosen mode | — |
| RECORE, RD 917/2025 of 15 October 2025 (amends RD 413/2014)New | Spot price + indicative regulatory premium (specific retributive regime) | Negative spot-price hours in blocks of 6 consecutive hours or more don't count as equivalent operating hours for the premium | As per chosen mode | Specific retributive regime (RECORE), distinct from standard self-consumption. RD 917/2025 now allows hybridization with storage without penalizing the premium calculation. Verify the client's plant is actually eligible. |
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. Official REE (Red Eléctrica) terminology.
| Mechanism | Revenue nature | Co-optimized hour by hour? | Key parameter | Limit / assumed simplification |
|---|---|---|---|---|
| Regulación primaria (FCR) | External revenue | Yes | Capacity price (€/MW/h), holding duration | Mandatory, unpaid automatic service for large groups in Spain, limited direct revenue; variable reservation hour by hour in theory, real markets often require a fixed commitment over a time block |
| Regulación secundaria (aFRR) and terciaria (mFRR)New | External revenue | Yes | Market price (€/MW/h and €/MWh), activation time (5 min aFRR, 12.5 min mFRR) | Spain connected to the European mFRR platform since December 2024 and aFRR since June 2025: easier battery access but tighter technical requirements (dual-control EMS) from 2026 |
| SRAD · Servicio de Respuesta Activa de la Demanda | External revenue | No, annual statistic | Sheddable capacity (MW), expected activations/year | Theoretical maximum potential. Real revenue is frequently well below this, depending on the year and zone |
| Peak shaving (contracted-power optimization) | Savings on own bill | Yes | Contracted-power exceedance tariff (€/kW) | — |
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
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