ACER gave energy traders a year to rebuild their reporting

Between 29 October and 4 November, three authorities changed the paperwork that stands between a flexible asset and a market. ACER published the first set of Europe's revised REMIT reporting rules and fixed the date they begin to bind, Lithuania's parliament cut what a developer has to post to its grid operator and how long a permit can run, and the Dutch cabinet put new connection requests in sixteen Gelderland municipalities on a waiting list. All three land on a 2027 budget rather than on a spread.

ACER put a date on Europe's new energy reporting rules

On 29 October the EU Agency for the Cooperation of Energy Regulators published the first set of its revised REMIT data reporting documents. Following the 2024 revision of REMIT and of its secondary legislation in 2026, the new requirements arrive in three phases between October 2027 and July 2028, and ACER is issuing its guidance in three matching sets. The first set covers exposure reporting, continuous reporting, LNG market data and bilateral transactions with energy-intensive consumers, and those first-phase requirements apply from 29 October 2027. Until then, reporting continues as it does today. The set includes an updated Transaction Reporting User Manual, a new guideline on transaction reporting with an annex on derivatives, new guidance on exposure reporting and updated electronic formats.

The detail sits in the implementation timeline ACER published alongside it, and it reaches further into flexibility than the headline suggests. Continuous reporting under Article 3 covers electricity and gas supply, electricity storage, and electricity and gas transportation capacity from 29 October 2027, at two working days after the trade for standard contracts and ten for non-standard ones, with organised marketplaces reporting the standard contracts and market participants the rest. Exposure reporting is quarterly, dated in the timeline from 1 January 2027, with a first deadline of 31 October 2027. Supply or storage of electricity to a single consumption unit able to consume 600 GWh a year or more, where the deal was not struck on a marketplace, is reported by the market participant every six months, first on 31 January 2028. Transactions relating to balancing services in electricity markets fall into phase two, with guidance due on 29 April 2027, application from 29 April 2028 and a first monthly report on 31 July 2028. All of it runs through registered reporting mechanisms and inside information platforms.

If you own BESS, PV, EV chargers, HVAC plant or C&I loads and somebody trades them for you, the thing to settle long before next autumn is who carries the reporting duty on each contract and whether that party already sits behind a registered reporting mechanism. The timeline splits the duty between the marketplace and the market participant according to how the trade was struck, so the answer is in your route-to-market agreement rather than in your asset list. Twelve months is comfortable for a contract review and tight for a data model that has to change underneath a live settlement process.

Fusebox also builds this kind of software alongside the people who will run it, rather than handing over a finished system. The work is spec-driven: discovery interviews and filled use cases become spec documents, delivery runs in phases, and each phase closes against acceptance criteria set before it starts. It assembles around what you already have instead of rebuilding from scratch, and the code is yours at the end.

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Lithuania halved the guarantee a project posts to its grid operator

Lithuania's parliament has adopted a package of amendments to the Law on Energy, the Law on Electricity and the Law on Energy from Renewable Sources, prepared by the Ministry of Energy in response to a sharp slowdown in new renewable projects. Developers holding valid permits can extend their development timelines by up to 48 months and change the nature of the planned investment, including switching between electricity generation, energy storage and electricity consumption. That flexibility runs for a limited period, with one year to decide, and anyone who postpones or modifies a project has to provide an additional bank guarantee. The performance guarantee payable to network operators falls by half, from €50 per kW to €25 per kW.

Two connection measures took effect on 1 November. Large-scale investors can now draw on the equipment reserves that electricity network operators maintain, which is meant to shorten connection work, and electricity and gas transmission and distribution operators must keep reserves of the critical equipment and materials needed to restore supply after accidents, technical failures or deliberate physical interference. Renewable energy communities and citizen energy communities building up to 100 kW under the prosumer park model stopped needing permits on the same date. The package also sets out which institution does what on EU cybersecurity requirements for cross-border electricity flows, dividing the work between the National Energy Regulatory Council, the Lithuanian Energy Agency and the National Cyber Security Centre. That follows a tightening already in force: in June, grid operators became able to disconnect plants above 100 kW that had missed the compliance deadline, and Inion Software chief executive Šarūnas Stanaitis told pv magazine that costs were high for small plants and that the queue for the firms doing the work ran to several months.

For anyone holding a Lithuanian permit they were quietly preparing to let lapse, the next twelve months are a decision window with a real option inside it. Price the storage case against the generation case before the year runs out, because the law now lets you move between them on a permit you already hold. A guarantee at half the old level frees working capital across the same pipeline, and access to operator equipment reserves changes the connection date you can credibly put in front of a lender. We can run the flexibility revenue side of that comparison with you, market by market.

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Sixteen Gelderland municipalities go on a connection waiting list

On 2 November the province of Gelderland said that new applications for an electricity connection in sixteen of its municipalities will go on a waiting list from 1 January 2027. The province was relaying a letter to parliament in which the cabinet said TenneT cannot release extra grid capacity in that area, so new connections cannot be delivered directly for the time being. The municipalities sit in the Achterhoek, Liemers and Stedendriehoek. Applications already lodged in priority categories two and three, such as housing and hospitals, can still be connected anywhere in Gelderland, and capacity freed elsewhere in the province goes to those categories first. How much has actually been built and how much grid room has come free will be reviewed every six months, with the next assessment in April 2027. The province used the announcement to press network operators to get more out of the grid that exists, naming flexible use of capacity, energy hubs, energy storage and new contract forms as the way to bridge the years until the planned reinforcements land.

That bridge is already carrying weight. In an allocation dated 7 November 2025, TenneT handed more than 9 GW of residual high-voltage capacity to 57 companies under time-dependent transmission rights, most of them large battery parks, with electrolysers and industrial boilers alongside them. A time-dependent right guarantees transport for at least 85% of the hours, with restrictions announced at least a day in advance, and TenneT said it can cut grid tariffs by up to 65% when combined with time-dependent rates. Demand ran far past supply: parties applied for over 70 GW against 9.1 GW available, and TenneT put the economically viable figure for large-scale batteries in 2030 at 5 to 7 GW.

If you run C&I sites, batteries or charging infrastructure in a congested Dutch region, the connection you already hold is the asset on the balance sheet, and a flexible contract is how the rest of the grid gets used before the steel arrives. Those contracts pay for operating discipline rather than for megawatts, which means forecasting, day-ahead planning and a control loop that can honour a restriction notified the evening before. If you are still scoping rather than deciding, our knowledge bot Fusie will answer the first round of questions.

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What to watch

• ACER holds a webinar on this first set of guidance on 23 November, with questions due by 16 November, and publishes separate guidance for reporting parties under the REMIT Delegated Regulation on 27 November.
• Phase two guidance is due on 29 April 2027 and brings transactions relating to balancing services in electricity markets into scope from 29 April 2028.
• The Nordic TSOs remove the Indivisible Bids Allowed attribute from the aFRR and mFRR capacity markets on 24 November, for the operational date of 25 November. Every bid then carries a mandatory Minimum Quantity, and an indivisible bid is made by setting that quantity equal to the offered one.
• Poland's 2026 renewable auctions run on 9 and 10 November, with a budget of about PLN 24.9 billion covering more than 76 TWh, split between installations up to 1 MW and above, open only to new installations and judged on price alone.
• Gelderland's next six-monthly assessment falls in April 2027, and decides whether the waiting list shortens or lengthens.
• Equipment prices keep moving: Huawei Digital Power has told customers it plans increases of 5% to 15% across residential, commercial and utility-scale solar and storage lines, with grid-forming utility-scale storage and power conversion systems at 5% to 10%, and Kehua Digital Energy followed with 5% to 15% effective 1 November.