- Greek FiP tracker
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Special Market Price (ΕΤΑ) and hours without operating aid
€/MWh
Estimate based on the national solar and wind output of ENTSO-E. The output profile and the curtailments of a specific plant are not taken into account, nor are imbalance costs. The official ΕΤΑ is published by ΔΑΠΕΕΠ after the end of each month. Without a subscription you see the figures and the hourly calendar of the current month only.
RES not absorbed — IPTO estimate
Estimate from IPTO's Integrated Scheduling Process (ISP1) of the day before: the RES output the system is not expected to absorb; most of it is usually not cleared in the DAM and IPTO restricts the rest. It concerns the whole system; it does not mean that the output of your own plant will be restricted. The actual restrictions of IPTO (also local grid limits) are published after the end of the month and are usually larger (GreekRES / Full). Today: the latest estimate, ISP2 (published at about 00:30) and, from 13:00, ISP3 (at about 12:20).
Create a free account to keep your reference price and technology. With a GreekRES or Full subscription you see the whole history since 2019 and the hourly calendar of every month, with the day-ahead market clearing price of every hour.
Hourly calendar
October 2026 (month to date)
- Who it concerns: solar and wind plants with a Feed-in Premium contract (FiP) that sell on the day-ahead market directly or through an aggregator (ΦοΣΕ / ΦοΣΕΤεΚ). Not stations with a feed-in tariff (ΣΕΣΤ).
- ΕΤΑ estimate: the Special Market Price (Ειδική Τιμή Αγοράς) is the value of a technology's output at the day-ahead price, weighted by the output (ν. 4414/2016, άρθ. 2 and 6). Here: day-ahead price of Greece × national output of ENTSO-E (solar B16; wind B18 + B19) per quarter-hour (an hourly value counts for its four quarter-hours), summed over the month ÷ output of the month — the solar / wind capture price of Greece in Greek months. ΔΑΠΕΕΠ computes the official ΕΤΑ after the month from the metered output of the plants, so the two can differ; the current month runs to the last complete day with output data (yesterday at the latest), for the ΕΤΑ, the hours and the output without aid alike. The official ΕΤΑ of ΔΑΠΕΕΠ is shown next to the estimate (chart and table) once published. Exception: during the temporary mechanism of the Regulated Producer Revenue Price (ΡΤΕΠ, 85 €/MWh, 08/07/2022 – 31/12/2023, grey band) the ΔΑΠΕΕΠ ΕΤΑ is computed on the ΡΤΕΠ and is not comparable with the estimate.
- Hours without aid (ν. 4414/2016 άρθ. 5 παρ. 10): plants with FiP get no operating aid for the energy they produce in periods of more than two consecutive hours whose hourly price counts under the rule in force — for the whole period:
- until 31/05/2026: hours with a zero or negative price;
- from 01/06/2026: hours with a negative price only; zero-price hours get the aid again (ν. 5313/2026 άρθ. 133). A zero-price hour therefore ends a negative period.
- Output without aid: share of the national solar / wind output of the month produced in those hours.
- Aid with your reference price: aid = (reference price − ΕΤΑ) × the output outside the hours without aid; per MWh produced = (reference price − ΕΤΑ) × (1 − share without aid). Average revenue price = market revenue per MWh (on the national profile equal to the ΕΤΑ) + aid per MWh produced. When the ΕΤΑ is above the reference price the difference is negative (Διαφορική Προσαύξηση can be negative: the producer returns it). No curtailments, imbalance costs or aggregator fees.
- Hourly calendar: each hour of the month in Greek time — no aid (red), zero price with aid (blue, from 01/06/2026), price ≤ 0 with aid (amber: a period of up to 2 hours), price above zero with output of the technology selected above (green: the aid is paid), price above zero without output (grey: national output under 1% of the month's highest hour), price above zero without output data yet (white with an outline: the hours of today after the last ENTSO-E value).
- RES not absorbed — IPTO estimate: the RES energy that IPTO expects the system will not be able to absorb (Energy Surplus of its Integrated Scheduling Process ISP1, published on the day before at about 18:40), for the whole system, not per plant. Most of it is usually RES not cleared in the DAM; the rest is a further restriction by IPTO. Per hour the mean of its quarter-hours (half-hours until 09/2025), per day the sum of the hours, in Greek time. % of the RES forecast: the surplus of the day ÷ the RES forecast of the ISP1. Window: from the start of the first to the end of the last quarter-hour with a surplus; peak: the highest quarter-hour. Surplus hours with operating aid: the hours of the month so far with a surplus and with aid (green, blue or amber on the hourly calendar, for the technology selected); hours without output data do not count. On the hourly calendar marks the hours with a surplus. Today: the latest estimate, ISP2 (published at about 00:30) and, from 13:00, ISP3 (at about 12:20).
- RES surplus or hour without aid?
- Hour without operating aid (red) — the market. The day-ahead price is negative for more than 2 consecutive hours. The plant can produce, but receives no operating aid for that energy, only the (negative) market price. The price decides, not IPTO.
- RES not absorbed () — the system. IPTO expects RES output to exceed what the system can safely absorb. Most of it is usually not cleared in the DAM (RES sell orders not cleared); IPTO (or HEDNO on its instruction) restricts the rest with instructions to limit the injection, also for local grid limits. This energy is not produced at all.
- They usually coincide: sunny middays → surplus → negative prices and RES not absorbed. For a FiP plant, a restriction in a red hour costs little (aid is lost anyway); in an hour with aid it loses both the aid and the market price. That is why we count the surplus hours with operating aid.
- If your aggregator does not sell at negative prices, your plant may also stop in red hours: that is a market choice, not IPTO curtailment.
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