Lisanssız GES’te Uyum Riskleri: Hangi Hatalar Geliri Sıfırlar?

Our Hourly Netting 2026 guide splits the kWh: netted, net withdrawal, surplus. This article asks a different question. Even if the arithmetic is right, which compliance mistakes wipe that period’s revenue? Unlicensed generation rests on “meeting your own demand”. If the link breaks, the plant still runs; the payment stops. kWh above the paid cap already go to unpaid YEKDEM — the 2× ceiling is in our unlicensed solar sales guide. Here the point is how revenue can vanish without ever hitting that ceiling.

Why the hourly model also hardens compliance

Monthly netting used to pool intra-day and holiday mismatches at month-end. Under hourly netting each hour closes on its own. Midday surplus does not offset evening load. If the plant runs on a holiday while the line is down, surplus leaves in that hour; the next working evening the same kWh is bought at retail or last-resort (SKTT) prices. The spread between the sale unit and the purchase unit stretches payback. Storage logic in our BESS after Hourly Netting guide closes that gap on site.

That is the economic break: the self-consumption ratio is no longer “the monthly total” but “which hours overlap”. The second layer that breaks the model is association and compliance. The mistakes below can zero a sound feasibility study in a single month.

1. Subscriber-group mismatch: factory vs head office

The consumption point used for netting must sit in the same subscriber group as the plant, or in a same-purpose use class the rules allow. This is not a “tariff typo”. Writing a factory (industry tariff) solar surplus onto an administrative building on a commercial or private-sector tariff breaks the “own demand” profile. The plant keeps running; the investor may receive no payment for that period. The energy is booked as an unpaid contribution to the YEKDEM pool.

• A factory (industry) and a headquarters (commercial) do not share one netting basket.
• Leaving a site whose group has changed on the “old association” puts that month’s revenue at risk.
• If output for the detected period falls into unpaid YEKDEM, that month’s cash is zero and payback lengthens by the same share.

2. Transfer and M&A: buying the plant does not buy the right

In unlicensed generation, netting is not a stand-alone asset glued to the plant. The right is granted to the legal link between the generation point and the consumption point. A share deal, an asset sale or moving only the solar plant can break that chain; the netting right may not travel by itself. The buyer cannot assume “I bought the plant, so I bought the netting”.

In practice: selling a solar portfolio needs more than the electrical design and the call letter. The consumption side must sit in the same pack, for the same purpose, on a current subscriber group. Otherwise the buyer takes a plant that is sound on paper and empty in law.

3. Aggregator and data error: multi-city portfolios

An aggregator runs notices, balance and sales for many unlicensed plants from one desk. In 2026 the role left “billing convenience”: hourly netting, LÜM filings and group discipline became operational risk. In tourism, retail or multi-province industry groups, a metering error from the DSO into EPİAŞ turns into a wrong netting line and lost revenue.

• Missing or time-shifted hourly data in YEPDİS / LÜM corrupts the netting row from the start.
• A mixed meter code or metering point ties the right output to the wrong load.
• An aggregator shrinks that error with a notice calendar, data checks and portfolio monitoring — it does not erase the investor’s duty.

4. Vested rights: the unit price is one thing, the method another

Investors ask first: “We banked a monthly-netting model; is hourly a vested-rights breach?” The short split is this. Valuing surplus at EMRA’s active-energy unit price sits close to the revenue regime. Whether netting is monthly or hourly is procedure for the grid and the market; the regulator’s discretion is wider. When the method changes, the unit price may stay — the self-consumption ratio still falls and cash flow still breaks. That is a predictability debate, not a court ruling.

• Household group: monthly netting continues regardless of installed capacity; the production/sales cap does not apply.
• Industry and commercial: hourly netting has been in force since 1 May 2026.
• A plant’s call letter and transition clauses still have to be read on the actual file.

Europe staged similar shifts: vested status, a multi-year taper, or a grace period. In Turkey the household exception is that kind of buffer. For an industrial investor the buffer is reading the method correctly and pulling self-consumption onto an hourly plan — not guessing the regulator’s intent.

5. Europe in brief: from net metering to net billing

Many EU countries first ran one-for-one net metering on the meter; the grid acted as a free battery. Network costs spilled onto customers without solar, and the price signal vanished. The common model today is net billing: withdrawal is billed at retail (taxed) prices; injection is valued at a separate — often market or regulated — unit. Turkey’s hourly netting plus sales at the subscriber-group tariff sits in that family. The conclusion is the same: the valuable kWh is the one consumed on site, in the right hour.

2026 checklist

Conclusion

After 1 May 2026 an unlicensed solar plant keeps two books. The first is arithmetic: hourly netting, the 2× cap, the sale unit. The second is compliance: subscriber group, the generation–load bond, transfer and data. If the first book breaks, payback lengthens. If the second breaks, that period’s revenue can go to zero. Where Europe moved to net billing, Turkey also put self-consumption and discipline first. The right reading is not “the rule changed, walk away”; it is to audit the link, the group and the hour every year. The Eligible-Consumer Hourly Netting Roadmap covers the money layer; this article covers the compliance mistakes that erase the income.