{"id":27990,"date":"2026-04-17T11:04:56","date_gmt":"2026-04-17T09:04:56","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=27990"},"modified":"2026-06-11T16:31:00","modified_gmt":"2026-06-11T14:31:00","slug":"current-reserve-with-better-new-source-of-extinction-in-ftm-operation","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/en\/momentanreserve-mit-bess-neue-erlosquelle-im-ftm-betrieb\/","title":{"rendered":"Momentary reserve with BESS: New revenue stream in FTM operation"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The marketing of <strong>Current reserve<\/strong> is developing into a new, stable revenue stream for operators of battery energy storage systems (BESS). Especially in <strong>Front-of-the-Meter (FTM) Operation<\/strong> enables them to generate additional revenue \u2013 without impacting existing business models such as <a href=\"https:\/\/cubeconcepts.de\/en\/balancing-energy-additional-transfers-through-electricity-storage\/\" type=\"post\" id=\"13978\">Control energy<\/a> or <a href=\"https:\/\/cubeconcepts.de\/en\/stromhandel-mit-besser\/\" type=\"post\" id=\"27950\">Power trading<\/a> to significantly restrict. Since the end of January 2026, it will be procured on a market basis by the four German transmission system operators (TSOs) and can thus increase the overall return of a BESS without significant capacity conflicts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This makes moment reserve another element in the <strong>Revenue Stacking<\/strong>, the combination of multiple revenue streams to maximize the economic efficiency of large-scale storage systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is the moment reserve?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To ensure grid stability and prevent blackouts, the German electricity system must maintain the frequency at a constant 50 Hz (\u00b1 0.2 Hz). If the frequency deviates, the balancing energy market intervenes. This includes primary control power (FCR) for rapid stabilization, automatic secondary control power (aFRR), and minute reserve control power (mFRR) \u2013 however, these control services require time to react. This is where instantaneous reserve comes in.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Momentary reserve is a non-frequency-related system service that balances short-term power imbalances in the grid. The reserve is replaced by primary control power within a few seconds. Traditionally, conventional power plants automatically provided this service via their rotating masses\u2014free of charge and without compensation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With the decline of conventional power plants as part of the energy transition, there was a need for action. The Federal Network Agency therefore developed a concept for market procurement in April 2025, and since January 22, 2026, there has been a new, remunerated market for this in Germany.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How do BESS operators earn money from operating reserve?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">While conventional reserve energy remunerates the provision of capacity (+\/-) as well as the actual delivered and withdrawn grid power, instant reserve exclusively rewards <strong>Provision of performance capacity<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Until 2026, there was no standalone market for this in Germany. In Great Britain, lucrative products have already emerged in the context of FFR (Fast Frequency Response), such as Dynamic Containment (DC). In Germany, there were previously only bilateral contracts with network operators or special innovation tenders for this. The new German market now offers the following advantages for BESS operators:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Fixed price remuneration for capacity retention<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">From 2026, current reserves in Germany will be market-based by the <a href=\"https:\/\/cubeconcepts.de\/en\/transmission-network-operator-in-germany-tasks-and-function\/\" type=\"post\" id=\"24680\">Transmission system operator<\/a> procured. Operators receive:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fixed remuneration per megawatt-second (MWs) of capacity provided<\/strong><\/li>\n\n\n\n<li>Monthly billing<\/li>\n\n\n\n<li>Contract terms of up to 10 years<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The following revenues are anticipated:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Product<\/strong><\/td><td><strong>Availability<\/strong><\/td><td><strong>Fixed price (1st period)<\/strong><\/td><td><strong>Example: 1 MW BESS (25 MWh)<\/strong><\/td><\/tr><tr><td>BESS Capacity as a Premium Product<\/td><td>&gt; 90 %<\/td><td>805 \u2013 888.50 \u20ac\/MWs\/year<\/td><td>\u20ac20,125-\u20ac22,213\/year<\/td><\/tr><tr><td>BESS capacity as a base product<\/td><td>&gt; 30 %<\/td><td>approx. 76 \u2013 150 \u20ac\/MWh\/year<\/td><td>\u20ac1,900 - \u20ac3,750 per year<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">A perfect addition to revenue stacking<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A key advantage of the instant reserve is that it brings hardly any operational limitations for other business models of a BESS. In contrast to classic grid reserve products or electricity trading, almost no active energy shifting is needed. Instead, the performance is based on the very fast response capability of the power electronics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This makes reserve time an excellent additional revenue stream within the framework of <strong>Revenue Stackings<\/strong>. Existing marketing strategies such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Primary Control Reserve<\/li>\n\n\n\n<li>Asymmetric Balancing Energy (aFRR)<\/li>\n\n\n\n<li><a href=\"https:\/\/cubeconcepts.de\/en\/stromhandel-mit-besser\/\" type=\"post\" id=\"27950\">Power trading<\/a> (<a href=\"https:\/\/cubeconcepts.de\/en\/intraday-trading-battery-storage\/\" type=\"post\" id=\"29153\">Intraday Trading<\/a> \/ <a href=\"https:\/\/cubeconcepts.de\/en\/day-ahead-battery-storage\/\">Day-Ahead<\/a> Arbitrage<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">remain fundamentally unaffected and can be continued in parallel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Crucial here is a powerful energy management system (<a href=\"https:\/\/cubeconcepts.de\/en\/products\/cube-efficiencyunit\/\" type=\"page\" id=\"18381\">EMS<\/a>), which coordinates the various markets and ensures availability. This helps to avoid potential conflicts of use and to specifically optimize the overall economic efficiency of the storage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Low load on the storage system<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Since the moment of reserve is primarily provided by the inverter's power and requires hardly any full charging and discharging cycles, the impact on battery aging is small.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For operators, this means:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>additional revenue without relevant degradation<\/li>\n\n\n\n<li>no significant impact on lifespan<\/li>\n\n\n\n<li>Stable addition to cycle-based business models<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The utilities notice that a 100 MW\/100 MWh storage system only needs to hold around 35 kWh of energy. This is a clear economic advantage, especially when compared to intensive electricity trading or frequent grid balancing calls. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Technical requirements for participation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To provide instantaneous reserves, battery storage systems must meet certain technical requirements, which are not insignificant. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Grid-Forming as a Central Requirement<\/strong><br>The provision of instantaneous reserve requires grid-forming inverters (<a href=\"https:\/\/cubeconcepts.de\/en\/grid-forming-with-grid-forming-inverters\/\" type=\"post\" id=\"24483\">Grid-Forming<\/a>Only these systems are capable of actively contributing to grid stability and simulating the necessary inertia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In contrast, conventional (grid-following) inverters merely follow the existing grid signal and cannot provide instantaneous reserve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Brief overview:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><\/td><td><strong>Grid-Forming Inverter<\/strong><\/td><td><strong>Grid-following inverter<\/strong><\/td><\/tr><tr><td><strong>Reaction<\/strong><\/td><td>Generates the voltage actively<\/td><td>Follows the mains voltage<\/td><\/tr><tr><td><strong>Speed<\/strong><\/td><td>almost 0ms<\/td><td>100ms - 500ms<\/td><\/tr><tr><td><strong>Use<\/strong><\/td><td>Momentary reserve + <a href=\"https:\/\/cubeconcepts.de\/en\/black-start-with-battery-storage\/\" type=\"post\" id=\"23350\">Black start<\/a><\/td><td>Only FCR\/aFRR<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Further requirements at a glance:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pre-qualification by the transmission system operators <\/li>\n\n\n\n<li>The grid connection must be at least at the medium voltage level.<\/li>\n\n\n\n<li>Integration into a virtual power plant or control system <\/li>\n\n\n\n<li>Fully automated operation and fast responsiveness <\/li>\n\n\n\n<li>Ensuring defined availability levels (e.g., &gt;90% % for the premium product)<\/li>\n\n\n\n<li>Certification of grid-forming properties in the Central Register for Unit and Component Certificates<a href=\"https:\/\/cubeconcepts.de\/en\/certificates-register-zerez-valid-from-february-2025\/\" type=\"post\" id=\"19087\">ZEREZ<\/a>)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Classification in FTM Operation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">I'm <strong>FTM operation<\/strong> The Momentanreserve currently leverages its strengths particularly well, as it can be combined almost effortlessly with the other FTM applications of a BESS. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Currently, a reserve complements this strategy meaningfully, as it:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>regardless of fluctuations in electricity prices<\/li>\n\n\n\n<li>No active storage operation is forced<\/li>\n\n\n\n<li>creates additional planning security<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This creates a stable counterweight to volatile revenue streams like electricity trading.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Risks &amp; Market Development<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Despite the attractive prospects, there are some factors that operators should consider:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Regulatory uncertainties<\/strong>The market design is based on current regulations by the Federal Network Agency and may change in the future.<\/li>\n\n\n\n<li><strong>Market saturation<\/strong>Since BESS are technologically ideal for ancillary services, a strong market uptake could lead to declining compensation in the long term.<\/li>\n\n\n\n<li><strong>Multi-Use Conflicts<\/strong>In cases of very high availability requirements, conflicts of use can arise with other revenue streams\u2014especially without optimized energy management.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion: Inertia Reserve as a Strategic Revenue Component<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Momentary reserve is developing into an important component of modern BESS business models.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For operators, it offers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>additional, stable income<\/strong><\/li>\n\n\n\n<li><strong>low technical burden<\/strong><\/li>\n\n\n\n<li><strong>High compatibility with existing strategies<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In FTM operation, it significantly contributes to <strong>Optimization of overall profitability<\/strong> especially in conjunction with balancing energy and electricity trading.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the long term, it should be seen less as a sole revenue driver, but rather as <strong>valuable building block in the overall portfolio of a battery storage system<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is operating reserve in the power grid?<\/summary>\n<p class=\"wp-block-paragraph\">Momentanreserve is an extremely fast grid service that balances frequency deviations in the power grid within milliseconds, even before conventional control reserves can intervene.<\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How does a BESS earn money with ancillary services?<\/summary>\n<p class=\"wp-block-paragraph\">By providing capacity, operators receive a fixed remuneration per MW, regardless of the actual energy supplied.<\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What are the requirements for a BESS for operating reserves?<\/summary>\n<p class=\"wp-block-paragraph\">Crucial are grid-forming inverters, pre-qualification with the grid operator, and high availability and automatic controllability.<\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What are the revenues from current reserves?<\/summary>\n<p class=\"wp-block-paragraph\">In the premium segment, revenues typically range from approximately \u20ac20,000\u2013\u20ac23,000 per MW per year\u2014in addition to other revenue streams.<\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can a moment reserve be combined with other BESS use cases?<\/summary>\n<p class=\"wp-block-paragraph\">Yes, it is ideal for multi-use operation and can be used in parallel with grid balancing and electricity trading.<\/p>\n<\/details>","protected":false},"excerpt":{"rendered":"<p>Momentary reserve is establishing itself as a new, stable revenue source for battery storage in full-time operation (FTM). It enables additional income without significant restrictions to existing business models. The contribution shows how the model works and the potential of revenue stacking.<\/p>","protected":false},"author":3,"featured_media":28032,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-27990","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-batteriespeicher"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Momentanreserve mit BESS: Neue Erl\u00f6se im FTM-Betrieb | CUBE CONCEPTS<\/title>\n<meta name=\"description\" content=\"Momentanreserve mit BESS erkl\u00e4rt: Wie Batteriespeicher durch Grid-Forming zus\u00e4tzliche Erl\u00f6se erzielen und ihre Wirtschaftlichkeit im FTM-Betrieb steigern.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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