EEG 2027 draft (BT‑Drs 21/7867): CfDs for PV ≥100 kW and updated Mieterstrom—what landlords should file in Q4 2026 before state‑aid approval ends 31 Dec 2026

What BT‑Drs 21/7867 changes from 1 January 2027

On 10 September 2026, the Federal Government introduced the EEG 2027 amendment into the Bundestag as BT‑Drs 21/7867. The draft aims at a “predictable, cost‑efficient, grid‑compatible and market‑oriented” expansion of renewables. Bestandsanlagen are explicitly protected; the new regime applies to plants that take part in tenders or go into operation from 1 January 2027. ([taylorwessing.com.cn](https://www.taylorwessing.com.cn/en/insights-and-events/insights/2026/09/pachtdeckel-im-gesetzesentwurf-zum-eeg-2027?utm_source=openai))

For PV systems of at least 100 kW, the draft replaces today’s one‑way market‑premium logic with a production‑based, two‑way Contracts‑for‑Difference (CfD) mechanism (in the bill often called a “Refinanzierungsbeitrag”). In high‑price years, supported plants above 100 kW must pay back part of revenues to the EEG account via the grid operator; in low‑price years, a premium continues to flow. Industry analyses and association positions confirm that the 100 kW threshold is central in the draft. ([pv-magazine.de](https://www.pv-magazine.de/2026/02/27/geleakter-eeg-entwurf-produktionsabhaengige-abschoepfung-kommt-ab-100-kilowatt-leistung/?utm_source=openai))

The Cabinet communication adds two design points: the government intends to limit downside risk (e.g., by capping the payback exposure) and to run the new model only for new plants from 2027. A six‑year horizon and a cap on the maximum annual exposure (20% of annual output; 18% in wind priority areas) are referenced in the government briefing. ([bundeswirtschaftsministerium.de](https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Pressemitteilungen/2026/07/20260729-eeg-novelle-und-netzanschlusspaket.html?utm_source=openai))

Sector notes also flag a draft “lease cap” discussion for PV roof rentals within BT‑Drs 21/7867. If enacted, it would curb excessive rooftop lease prices to reduce overall support costs. Details are still under committee negotiation at the time of writing. ([taylorwessing.com.cn](https://www.taylorwessing.com.cn/en/insights-and-events/insights/2026/09/pachtdeckel-im-gesetzesentwurf-zum-eeg-2027?utm_source=openai))

Mieterstrom under the draft: what stays and what tightens

The Mieterstrom surcharge remains as an instrument in the draft, but metering and allocation become more exacting. Under current law, the operator must assign the plant to the “Mieterstromzuschlag” sales form with the grid operator, and only deliveries to end‑users on the property (or via a permitted third‑party supplier in the customer installation) qualify. The grid operator pays the surcharge. These basic mechanics continue, while metering and settlement interfaces tighten. ([bundesnetzagentur.de](https://www.bundesnetzagentur.de/899948?utm_source=openai))

The Bundesnetzagentur clarifies that the surcharge is a grid‑operator‑paid premium triggered by the operator’s allocation to the Mieterstrom sales form, alongside the chosen form for any exported surplus. The agency’s public guidance and FAQs continue to apply; current surcharge values are published by the regulator and depend on commissioning date and plant size. ([bundesnetzagentur.de](https://www.bundesnetzagentur.de/899948?utm_source=openai))

A July 2026 sector brief ties Mieterstrom to two parallel reforms: Energy sharing and metering packages (“Mispel/Agnes”), with indicative start dates from October 2027 and January 2029 for certain measurement delineations. That calendar is outside the EEG 2027’s immediate start and underscores that practical rollout will be phased. ([zfk.de](https://www.zfk.de/energie/waermewende/mieterstrom-eeg-agnes-mispel-energy-sharing-neue-regeln-2027?utm_source=openai))

Why 31 December 2026 matters: state‑aid approval window

The current EEG 2023 state‑aid approval from the European Commission runs only until 31 December 2026 for key elements. The Commission’s case documents explicitly refer to approval of EEG 2023 until that date and to Germany’s commitment to add a clawback‑type mechanism to avoid overcompensation—precisely what the CfD design now implements. The EEG 2027 draft therefore places most payment‑relevant parts under a formal EU state‑aid approval reservation (§102 draft), to be published in the Federal Gazette once granted. Until that approval is in place, payments under the new regime may be subject to reservation. ([ec.europa.eu](https://ec.europa.eu/competition/state_aid/cases1/202402/SA_108070_10D8ED8C-0100-C61E-87B2-B4D7A6F5EA3F_30_1.pdf?utm_source=openai))

Practically, this makes 31 December 2026 the last calendar day to commission under the fully approved EEG 2023 framework. The government also states that “Bestandsanlagen are protected” and that the new rules apply only to new plants from 2027. ([bundeswirtschaftsministerium.de](https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Pressemitteilungen/2026/07/20260729-eeg-novelle-und-netzanschlusspaket.html?utm_source=openai))

Q4 2026 checklist: filings and documents to lock today’s rules

For landlords planning rooftop PV on multifamily buildings, especially 100–400 kW systems common on large blocks, the objective is documented commissioning by 31 December 2026 and complete filings shortly thereafter. Use this checklist:

- Grid connection and commissioning proof by 31 December 2026 - Achieve technical commissioning (Inbetriebnahme) and first parallel operation by 31 December 2026. Keep the installer’s commissioning protocol and the grid operator’s acceptance record. The commissioning date governs which EEG regime applies. ([bundeswirtschaftsministerium.de](https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Pressemitteilungen/2026/07/20260729-eeg-novelle-und-netzanschlusspaket.html?utm_source=openai)) - For plants ≥100 kW, ensure a direct‑marketing agreement is in place from day one (as under today’s rules) so billing of the market premium can start. Confirm your grid operator’s requirements. (General EEG 2023 framework.) ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/eeg_2014/__22.html?utm_source=openai))

- Market master data registration (MaStR) within one month of commissioning - Register the plant (and any battery) in the Marktstammdatenregister within one month of commissioning to secure payments; missing the one‑month window can jeopardise disbursements or trigger deductions. Pre‑registration is possible; the in‑service date ultimately controls eligibility. ([marktstammdatenregister.de](https://www.marktstammdatenregister.de/MaStRHilfe/subpages/registrierungVerpflichtendFristen.html?utm_source=openai))

- Assign “Mieterstromzuschlag” with the grid operator if you supply tenants - File the allocation to the “Mieterstromzuschlag” sales form and the chosen form for exported surplus. Expect the grid operator to require: proof of commissioning and location, metering concept for the customer installation, list of participating apartments, and declarations that Mieterstrom contracts are not coupled to tenancy and meet EnWG/MsbG requirements. Use the operator’s standard “Nachweis zum Anspruch auf Mieterstromzuschlag” templates. ([bundesnetzagentur.de](https://www.bundesnetzagentur.de/899948?utm_source=openai))

- Metering concept and contracts - Submit the rooftop metering concept (physical or virtual summation, sub‑meter locations) for approval; clarify who is the responsible metering operator (gMSB/wMSB). Provide tenant supply contracts and identify each participating metering point for residual supply billing. ([mitnetz-strom.de](https://www.mitnetz-strom.de/energie-beziehen/gewerbe-und-industrie/mieterstrom-geb%C3%A4udestrom_energysharing/mieterstrommodell-mit-virtuellem-oder-physischem-summenz%C3%A4hler?utm_source=openai))

- Keep evidence packages - Maintain a file with commissioning protocol, grid‑operator acceptance, MaStR confirmations, direct‑marketing contract (if ≥100 kW), Mieterstrom allocation and forms, tenant contracts, and the metering concept approval. Many operators publish checklists—use them to avoid back‑and‑forth that could delay first payments. ([netze-bw.de](https://www.netze-bw.de/stromeinspeisung/mieterstrom-ggv?utm_source=openai))

Timing note: You can complete MaStR registration in January 2027 if commissioning occurred by 31 December 2026; the statutory one‑month window applies. The decisive factor for locking the EEG 2023 regime is the commissioning date, not the registration date. ([marktstammdatenregister.de](https://www.marktstammdatenregister.de/MaStRHilfe/subpages/registrierungVerpflichtendFristen.html?utm_source=openai))

If commissioning slips into 2027: what to expect

Plants ≥100 kW commissioned from 1 January 2027 would enter the draft’s CfD world, with production‑based payback in high‑price years and a premium in low‑price years. The Cabinet text also outlines transitional support for small PV—such as time‑limited payments and a small direct‑marketing bonus—intended to bridge the shift away from classic feed‑in remuneration for new installations. Exact values and scopes may change in Parliament and remain subject to EU state‑aid approval. ([bundeswirtschaftsministerium.de](https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Pressemitteilungen/2026/07/20260729-eeg-novelle-und-netzanschlusspaket.html?utm_source=openai))

Risk note: Tariff tables and modalities in the new regime will not be fully firm until the Commission’s approval is published under the draft’s §102 mechanism. Expect some administrative lag in early 2027 for first‑of‑its‑kind cases. Consider staging projects or splitting capacity so that at least part of your roof is commissioned by 31 December 2026. Consult a German energy lawyer or specialist metering/market‑access provider before signing tenant supply contracts that assume specific 2027 payments. ([bundeswirtschaftsministerium.de](https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Artikel/Service/Gesetzesvorhaben/2026/20260718-eeg-novelle.html?utm_source=openai))