From field energy audits to independent market intelligence for the Irish grid
Stromfee.cloud is the European market-intelligence layer developed by HR Energiemanagement GmbH, an energy engineering consultancy headquartered in Bünde, North Rhine-Westphalia, Germany, with continuous activity in the energy sector since 1984. The platform ingests hourly Day-Ahead prices published on the ENTSO-E Transparency Platform ENTSO-E Transparency Platform — Day-Ahead prices and European power system data, cross-references them with regulatory data from the Commission for Regulation of Utilities (CRU) and EirGrid EirGrid — RESS Administration, Grid Connection, and Generation Capacity Statement, and makes the combined dataset available to photovoltaic asset owners, battery energy storage system (BESS) operators, and energy market engineers who need an independent analytical source — one with no commercial interest in any equipment manufacturer or energy sales model. The data architecture is open and verifiable: prices are drawn directly from ENTSO-E and from the Single Electricity Market Operator (SEMO) SEMO — I-SEM Market Structure: DAM, IDM, Balancing, CRM. No figure published on the platform is a proprietary forecast without empirical grounding; every predictive value is built on historical series that the user can independently verify. This page describes our background, methodology, and the editorial principles that guide the development of the Ireland module of the platform.
Four decades of energy engineering: from the field meter to the market model
HR Energiemanagement GmbH was not founded as a technology company. Its roots lie in field engineering: measurement of heat and energy flows, diagnostics of combined heat and power (CHP) systems, biogas plants, and industrial process installations. Holger Roswandowicz, its founder and managing director, holds a Diplom-Ingenieur degree from the Technische Universität Magdeburg (energy systems and automation) and is a certified energy auditor under DIN EN 16247-1 accredited by the German Federal Office for Economic Affairs and Export Control (BAFA), as well as an ISO 50001-certified auditor through TAW-cert. That technical background of more than three decades defines the character of the Stromfee platform: a preference for measurement over estimation, and for primary data sources over market consensus.
From industrial consultancy to digital platform
The company began its work in industrial energy consultancy, carrying out certified energy audits under DIN EN 16247-1 for manufacturing, food processing, and public utility clients across northern Germany. Over time, the volume of data collected during those audits — real consumption measurements, load profiles, inverter performance logs, and supply contract analyses — made clear that the majority of revenue losses in photovoltaic and cogeneration installations did not originate from major technical faults, but from accumulated inefficiencies in data management and market interpretation. That field observation was the starting point for Stromfee as an analytical platform: a tool built by engineers who had spent years measuring what others were estimating.
The origin of the Stromfee brand
The name Stromfee — literally 'electricity fairy' in German — reflects the intention of making comprehensible what the electricity system conceals in the complexity of its rules. The platform began as an internal analysis tool for audit clients, and progressively evolved into a web environment accessible to third parties. Stromfee.ai is today the central platform; Stromfee.cloud is its extension into European market analysis, with country-specific modules that integrate each national regulatory framework. The Ireland module, stromfee.cloud/ie/, covers I-SEM Day-Ahead and intraday prices from SEMO SEMO — I-SEM Market Structure: DAM, IDM, Balancing, CRM, the RESS negative-price and curtailment compensation rules, the CRU network charge reform for storage ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026), and the Future Arrangements for System Services (FASS) programme transition from DS3.
Independence as an operating principle
HR Energiemanagement GmbH does not sell equipment, does not operate asset portfolios of its own, and has no marketing agreements with battery manufacturers or solar park developers. This position of independence is deliberate: an analyst who also sells hardware has a structural conflict of interest when evaluating the profitability of an installation. Stromfee.cloud does not recommend brands; it facilitates data analysis so that operators and investors can form their own decisions using verifiable information. Direct contact with the engineering team is always through HR Energiemanagement GmbH: Werfener Heide 14, 32257 Bünde, Germany. Phone: +49 5223 4921030.
Market intelligence built on ENTSO-E and I-SEM data for Ireland and Europe
Stromfee.cloud is not an energy news portal and not a domestic tariff comparison service. It is an analytical tool for sector professionals — project engineers, PV asset managers, BESS operators, and energy finance advisers — who need precise hourly data, regulatory context, and optimisation tools without having to build their own data infrastructure. The platform architecture combines automated ingestion of Day-Ahead prices from the I-SEM bidding zone, historical analysis of negative- and positive-price episodes, and a regulatory interpretation layer updated to reflect the current Irish framework. For Ireland, the regulatory module covers the Renewable Electricity Support Scheme (RESS) two-way Contract for Difference, the Unrealised Available Energy Compensation (UAEC) mechanism for curtailment during oversupply DCCAE — RESS Scheme Overview and Auction Round Results (RESS 1–5), the CRU network charge reform removing Demand TUoS from storage from October 2026 ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026), and the FASS/DASSA system services transition targeted for May 2027.
ENTSO-E Day-Ahead data: what it is and why it matters for Irish operators
The I-SEM Day-Ahead Market (DAM) is a daily auction co-managed by EirGrid and SONI through their joint exchange SEMOpx, clearing each day for the following day's 48 half-hour trading periods. Ireland is integrated into the European Single Day-Ahead Coupling (SDAC) mechanism ENTSO-E Transparency Platform — Day-Ahead prices and European power system data, meaning the all-island clearing price is set in co-optimisation with neighbouring bidding zones including Great Britain. The resulting half-hourly price sequence is made available on the ENTSO-E Transparency Platform ENTSO-E Transparency Platform — Day-Ahead prices and European power system data and via SEMO's own market results portal SEMO — I-SEM Market Structure: DAM, IDM, Balancing, CRM shortly after the noon CET market close. Stromfee.cloud downloads and stores these series to construct practically useful indicators: the frequency and duration of negative-price episodes (relevant to RESS support payment rules), the optimal charge and discharge windows for BESS arbitrage, and comparisons between the Irish bidding zone and other European pricing areas. These figures are not Stromfee projections — they are public market data that the platform aggregates and contextualises.
The Ireland regulatory module: RESS, curtailment, and the FASS transition
Ireland's primary renewable support instrument is the Renewable Electricity Support Scheme (RESS), established under S.I. No. 365/2020 DCCAE — RESS Scheme Overview and Auction Round Results (RESS 1–5). RESS operates as a two-way Contract for Difference: when the Day-Ahead reference price falls below the auction-determined strike price, the support account pays the difference; when market prices exceed the strike price, the generator pays back the surplus. Crucially, no CfD support payment is made for electricity generated during hours when the Day-Ahead reference price is negative. Generators curtailed voluntarily or by system instruction during such hours can instead access the Unrealised Available Energy Compensation (UAEC) mechanism — but only for oversupply curtailment, not for network constraint curtailment. This distinction is one of the most commercially significant features of Irish renewable project economics, and the Stromfee Ireland module documents it with reference to the primary regulatory sources. The regulatory summary is accessible at /ie/rules/.
BESS analysis: technical standards and the Irish market framework
Battery energy storage systems (BESS) in Ireland operate within a dual framework: technical-normative and regulatory-market. On the technical side, the applicable standards include IEC 62619:2022 for lithium cell safety in stationary applications ENTSO-E Transparency Platform — Day-Ahead prices and European power system data, IEC 61000 for electromagnetic compatibility, and EN 50549 for grid connection of generating plants. On the regulatory side, a BESS in Ireland can now access five distinct revenue streams following the November 2025 go-live of the SDP-02 scheduling and dispatch reform: Day-Ahead wholesale arbitrage via SEMOpx, intraday position adjustment, Balancing Market dispatch, the legacy DS3 system services programme (transitioning to the competitive FASS/DASSA framework), and the Capacity Remuneration Mechanism (CRM). The December 2024 T-4 CRM auction for the 2028/29 delivery year cleared at approximately €149,960/MW SEMO — I-SEM Market Structure: DAM, IDM, Balancing, CRM — a figure that underscores the value Ireland places on dispatchable flexibility. Details of the technical engineering framework are available at /ie/bess-engineer/.
What Stromfee.cloud says and does not say: our standards for honest editorial content
A market analysis platform faces constant temptation to expand its apparent credibility with claims it cannot support: guaranteed return percentages, long-range price forecasts, or benchmarks against other companies' systems that the author has not independently verified. Stromfee.cloud operates on a different principle: any quantitative claim on the platform must be traceable to a named primary source. What we cannot verify, we mark as an estimate or as a figure pending confirmation. This section sets out the principles that govern all content published on the platform.
No figure without a source
Every numerical value that appears on Stromfee.cloud — negative-price hours, annual average prices, installed capacity of photovoltaic or storage assets — is linked to a verifiable primary source: the ENTSO-E Transparency Platform ENTSO-E Transparency Platform — Day-Ahead prices and European power system data, EirGrid's Generation Capacity Statement or System Operator reports EirGrid — RESS Administration, Grid Connection, and Generation Capacity Statement, SEMO market results SEMO — I-SEM Market Structure: DAM, IDM, Balancing, CRM, or regulatory documents from the CRU or the Department of the Environment, Climate and Communications. We do not publish long-range market price projections of our own construction, because the inherent uncertainty of multi-year electricity price models would make those figures more misleading than useful. What we do provide is complete historical series and tools that allow the user to build their own models from real data.
No investment advice
The content of Stromfee.cloud — including the regulatory guides available at /ie/rules/ — is technical and editorial information, not legal, financial, or investment advice. The Irish energy regulatory landscape is in active transformation: the CRU's April 2026 network charge minded-to decision ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026), the FASS/DASSA programme timeline, and Ireland's ongoing transposition of EU Directive 2024/1711 may all have been supplemented or amended after the update date of any given section of the platform. We always recommend verifying the current status of any regulation against primary sources — the CRU website (cru.ie) and the Irish Statute Book (irishstatutebook.ie) — before making investment decisions. For installation-specific analysis, the HR Energiemanagement GmbH engineering team offers personalised audit and consultancy services.
Transparency about data limitations
The ENTSO-E Day-Ahead prices reflect the wholesale electricity market clearing price, not the final economics of a generator or storage operator. Between the I-SEM clearing price and the profit and loss account of a BESS or solar farm sit multiple additional layers: Transmission Use of System charges (G-TUoS, currently under reform for storage ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026)), Distribution Use of System charges, capacity payments from the CRM, system services revenues from DS3 or FASS, imbalance costs from the Balancing Market, the terms of any Power Purchase Agreement, and the asset's operating costs. None of these are captured in the Day-Ahead price alone. Stromfee.cloud explicitly identifies these layers in each analytical tool to ensure that users do not confuse the raw wholesale price with the net return of their project.
Why an independent analytical platform makes sense in the Irish electricity market of 2025–2026
Ireland's electricity system is undergoing a structural transition of historic proportions. The country has committed to 80% renewable electricity by 2030, up from approximately 35% wind and solar generation in 2025, and has deployed competitive auction rounds under RESS that have contracted over 5.3 GW across five rounds since 2020 DCCAE — RESS Scheme Overview and Auction Round Results (RESS 1–5). The SNSP limit — determining how much non-synchronous renewable generation the system can carry in real time — stood at 75% in 2025 and contributed to 17% of all wind dispatch-down in that year, up from just 1% in 2024, as the renewable fleet expands faster than the grid's flexibility infrastructure. Total wind constraint and curtailment costs reached €567 million in 2024/25, approximately twice Great Britain's effective balancing cost per MWh on a grid one-tenth the size. Against this backdrop, BESS deployment has moved from peripheral to central in Irish energy policy, with a dedicated Electricity Storage Policy Framework published in July 2024 and the SDP-02 reform enabling full wholesale market participation for batteries from November 2025. Stromfee.cloud offers the data substrate and regulatory context that makes rigorous analysis of this environment possible.
The curtailment problem: scale and commercial consequences
Ireland has one of the highest proportional curtailment rates among EU member states. In 2025, total wind dispatch-down across the all-island system reached approximately 11.3%, comprising 6.6% network constraint curtailment and 4.7% SNSP-driven oversupply curtailment EirGrid — RESS Administration, Grid Connection, and Generation Capacity Statement. The commercially critical distinction — established in the RESS terms applicable from RESS 3 onwards — is that oversupply curtailment (where the system has more generation than demand can absorb) qualifies for the UAEC compensation mechanism at the generator's strike price, while network constraint curtailment (where a physical grid bottleneck prevents delivery) is not compensated under RESS DCCAE — RESS Scheme Overview and Auction Round Results (RESS 1–5). For an asset owner calculating revenue forecasts, understanding which curtailment events fall into which category is not a regulatory technicality — it is a material difference in annual income. Stromfee.cloud's Ireland module enables operators to identify negative-price episodes and curtailment windows from the historical market data, providing the evidential basis for UAEC claims and production variance analysis.
Storage as the systemic response: the 2024–2026 policy shift
The Irish government's July 2024 Electricity Storage Policy Framework ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026) explicitly identified curtailment reduction as the primary societal benefit of storage deployment. Co-located battery storage sharing a grid connection with a host wind or solar farm is now formally permitted under the revised Enduring Connection Policy (ECP-2), removing the prior requirement for separate connection points and enabling batteries to absorb would-be curtailed energy for later dispatch. The CRU's April 2026 minded-to decision on network charges proposes to eliminate the double-charging of transmission fees for storage — removing approximately €30/MWh from each charging cycle and, according to independent modelling, potentially doubling the internal rate of return on a standard transmission-connected battery project ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026). With the FASS/DASSA system services framework targeted for go-live in May 2027, the Irish BESS market is entering a period of profound transition from fixed tariffs to competitive revenue stacking. Stromfee.cloud provides the I-SEM price data and regulatory context that operators and investors need to navigate that transition.
- ENTSO-E Transparency Platform — Day-Ahead prices and European power system data
- EirGrid — RESS Administration, Grid Connection, and Generation Capacity Statement
- SEMO — I-SEM Market Structure: DAM, IDM, Balancing, CRM
- ESS News — CRU Minded-To Decision on Network Charges for Storage (April 2026)
- DCCAE — RESS Scheme Overview and Auction Round Results (RESS 1–5)
Interested in analysing I-SEM price data for your Irish BESS or PV asset?
The HR Energiemanagement GmbH engineering team is available for technical consultations on energy audits, profitability analysis of photovoltaic installations, and BESS project modelling in the I-SEM. Contact us at +49 5223 4921030 or explore the complete Irish regulatory framework at <a href='/ie/rules/'>/ie/rules/</a> on this platform, or visit the global analysis platform at <a href='https://stromfee.ai'>stromfee.ai</a>.