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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