How does the SoH estimation influence the profitability of BESS? | Electricity feetle> <meta name="description" content="How does the SoH estimation influence the profitability of BESS? The SoH (State of Health) estimation is a critical indicator for quantifying the degradation of a battery cell or module in batteries"> <link rel="canonical" href="https://stromfee-mauritius.ai/en/glaesern/bess/wizards/soh-schaetzung/"> <script type="application/ld+json">{"@context": "https://schema.org", "@type": "Article", "headline": "How does the SoH estimation influence the profitability of BESS?", "mainEntityOfPage": "/glaesern/bess/wizards/soh-schaetzung/", "description": "SoH-Schätzung (State of Health) — Component in the battery storage. Standard: IEC 62933."}</script> <script type="application/ld+json">{"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What is SoH in a battery storage system?", "acceptedAnswer": {"@type": "Answer", "text": "SoH stands for State of Health and describes the percentage of capacity currently available compared to the initial capacity of the BESS."}}, {"@type": "Question", "name": "Why is the SoH estimation important for profitability?", "acceptedAnswer": {"@type": "Answer", "text": "It allows for the precise calculation of remaining lifespan, which enables the economic planning and optimisation of investments in spare parts and maintenance."}}, {"@type": "Question", "name": "How is the State of Health determined technically?", "acceptedAnswer": {"@type": "Answer", "text": "The estimation is performed by algorithms that analyse parameters such as capacity loss, voltage drop under load, and increase in internal resistance."}}, {"@type": "Question", "name": "At what point must a BESS be replaced due to low SoH?", "acceptedAnswer": {"@type": "Answer", "text": "Replacement is generally considered when the SoH falls below a defined threshold (often 70-80%) or when the capacity no longer meets the requirements of the load profile."}}, {"@type": "Question", "name": "How does degradation influence the efficiency of the BESS?", "acceptedAnswer": {"@type": "Answer", "text": "Increasing internal resistance leads to higher power losses and lower discharge power, which reduces daily energy yield."}}, {"@type": "Question", "name": "Which standards govern the monitoring of battery storage systems?", "acceptedAnswer": {"@type": "Answer", "text": "The IEC 62933 series defines the requirements for the design, safety, and operation of battery storage systems, including the necessary monitoring functions."}}]}</script> 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class="wrap navrow"> <a class="brand" href="/glaesern/bess/">◈ Transparent BESS</a> <nav class="nlinks"><a href="/glaesern/bess/">All trades</a> <a href="/glaesern/bess/bms.html">Battery management</a></nav> <a class="navcta" href="#kontakt">Installation check →</a></div></header> <div class="hero-w"><h1>SoH (State of Health) estimation</h1><p>Component assistant · Battery management</p> </div> <div class="wiz-wrap"> <div id="steps"> <div class="st" data-s="1"><span class="no">1</span> Comprendre </div> <div class="st" data-s="2"><span class="no">2</span>View live</div> <div class="st" data-s="3"><span class="no">3</span>What the AI does</div> <div class="st" data-s="4"><span class="no">4</span>Your benefit</div> </div> <div id="body"></div> </div> <div class="sec"><h2>Diagram — Process & sensors live</h2><p class="lead">The path through the domain, with the actual measurement points of the installation.</p><svg viewBox="0 0 920 300" style="width:100%;height:auto;background:#fdfcff;border:1px solid #fed7aa;border-radius:16px"><defs><linearGradient id="bx" x1="0" y1="0" x2="0" y2="1"><stop offset="0" stop-color="#fff"/><stop offset="1" stop-color="#fff7ed"/></linearGradient><marker id="ar" markerWidth="8" markerHeight="8" refX="6" refY="3" orient="auto"><path d="M0,0 L6,3 L0,6 Z" fill="#f97316"/></marker></defs><text x="20" y="30" font-size="14" font-weight="800" fill="#ea580c">Battery management — Process diagram</text><text x="20" y="48" font-size="10.5" fill="#86868b">green = live sensor of the installation · flow from left to right</text><line x1="138" y1="152" x2="268" y2="152" stroke="#f97316" stroke-width="2.5" marker-end="url(#ar)"/><line x1="392" y1="152" x2="522" y2="152" stroke="#f97316" stroke-width="2.5" marker-end="url(#ar)"/><line x1="646" y1="152" x2="776" y2="152" stroke="#f97316" stroke-width="2.5" marker-end="url(#ar)"/><g><rect x="20" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="79" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f"> Cellules </text><text x="79" y="170" text-anchor="middle" font-size="10.5" fill="#86868b"> Mesure </text></g><g><rect x="274" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="333" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f"> Rack-BMS </text></g><g><rect x="528" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="587" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f"> Balancing </text><text x="587" y="170" text-anchor="middle" font-size="10.5" fill="#86868b"> Équilibrage </text></g><g><rect x="782" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="841" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f"> Notification </text></g></svg></div> <div class="sec"><div class="block"><h3>Thus we connect — read-only</h3><p class="step-p">The value comes from<b>Modbus TCP · CAN (BMS) · PCS</b>from the installation —<b>read, not controlled</b>. Everything is<b>in-house</b>calculated, nothing leaves the house. No obligation to disclose operating data.</p></div><div class="block"><h3>Your own BESS LLM — offline</h3><p class="step-p">Questions in plain language, answered by<b>Your own installation data</b>— local, no cloud. The AI runs internally; the installation remains yours.</p></div><div class="note"><b>Regulatory framework:</b>IEC 62933</div><div class="block"><h3>Connection with the entire installation</h3><p class="step-p">Storage only reveals its value within the system: with PV, load peaks, and electricity prices. The AI plans storage in relation to the entire installation.</p><div style="display:flex;gap:.6rem;flex-wrap:wrap;margin-top:.6rem"><a href="/glaesern/cogeneration/" style="font-size:.85rem;padding:.4rem .9rem;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--accent)">Gläsernes BHKW →</a><a href="/glaesern/hotel/" style="font-size:.85rem;padding:.4rem .9rem;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--accent)">Gläsernes Hotel →</a><a href="/fr/pv-watcher/" style="font-size:.85rem;padding:.4rem .9rem;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--accent)">PV-Watcher →</a></div></div></div><div class="sec faqsec"><h2>Frequently Asked Questions</h2><details><summary>What is SoH in a battery storage system?</summary><div class="faq-a">SoH stands for State of Health and describes the percentage of capacity currently available compared to the initial capacity of the BESS.</div></details><details><summary>Why is the SoH estimation important for profitability?</summary><div class="faq-a">It allows for the precise calculation of remaining lifespan, which enables the economic planning and optimisation of investments in spare parts and maintenance.</div></details><details><summary>How is State of Health determined technically?</summary><div class="faq-a">The estimation is performed by algorithms that analyse parameters such as capacity loss, voltage drop under load, and increase in internal resistance.</div></details><details><summary>At what point must a BESS be replaced due to low SoH?</summary><div class="faq-a">Replacement is generally considered when the SoH falls below a defined threshold (often 70-80%) or when the capacity no longer meets the requirements of the load profile.</div></details><details><summary>How does degradation affect the efficiency of the BESS?</summary><div class="faq-a">Increasing internal resistance leads to higher power losses and lower discharge power, which reduces daily energy yield.</div></details><details><summary>Which standards govern the monitoring of battery storage systems?</summary><div class="faq-a">The IEC 62933 series defines the requirements for the design, safety, and operation of battery storage systems, including the necessary monitoring functions.</div></details></div> <footer class="site"><div class="wrap"> <div class="fbrand">◈ Transparent BESS</div> <p class="fclaim">Connected in read-only mode · local calculation · no cloud. The installation remains with you.</p> <nav class="flinks"><a href="/glaesern/bess/">All trades</a> <a href="/glaesern/bess/bms.html">Battery management</a> <a href="https://bhkw-anlagen.com/impressum.html">Legal notice</a> <a href="https://bhkw-anlagen.com/datenschutz.html">Data protection</a></nav> <div class="fcopy">© 2026 HR Energiemanagement GmbH · 32257 Bünde · +49 5223 4921030</div> </div></footer> <script> var state={step:1}; function li(t){return '<li>'+t+'</li>';} function nav(s){var b=s>1?'<button class="wiz-back" onclick="go('+(s-1)+')">← Back</button>':'<span></span>'; var n=s<4?'<button class="wiz-next" onclick="go('+(s+1)+')">Next →</button>':'<button class="wiz-next" onclick="go(1)">From the beginning</button>'; return '<div class="wiz-nav">'+b+n+'</div>';} function step1(){return '<div class="step-grid"><img class="step-img" src="../img/bms.jpg" alt="SoH (State of Health) estimation">'+ '<div><p class="step-kicker">Step 1 · Understand</p><h2 class="step-h">What is the SoH (State of Health) estimation?</h2>>'+ '<p class="step-p">The SoH estimate (State of Health) is a critical metric for quantifying the degradation of a battery cell or module in a battery energy storage system (BESS). It relates current capacity to the original nominal capacity and is essential for lifecycle planning according to IEC 62933. Accurate SoH determination enables prediction of End-of-Life (EoL) and ensures the technical integrity of the system.</p></div></div>'+nav(1);} function step2(){return '<div class="step-grid"><div><p class="step-kicker">Step 2 · See live</p><h2 class="step-h">No own register — honestly</h2><p class="step-p">For this component, <b>no own register</b> is connected; therefore, no example value is intentionally displayed here. Where the system measures, the value is read as read-only and calculated locally. It becomes visible via connected components.</p></div><img class="step-img" src="../img/bms.jpg" alt="System">10>'+nav(2);} function step3(){return '<div class="step-grid"><div><p class="step-kicker">Step 3 · What the AI does</p>'+ '<h2 class="step-h">Ce que l’IA lit dans ce composant</h2><ul class="chk">'+li('Perte de la <b>capacité nominale</b> comme indicateur du nombre de cycles restants')+li('Augmentation de la <b>résistance interne</b> pour identifier le vieillissement des cellules')+li('Écart de la <b>courbe de charge</b> pour déterminer la capacité de stockage effective')+li('Détermination du <b>taux de dégradation</b> pour planifier les investissements de remplacement')+'</ul></div>'+ '<img class="step-img" src="../img/ki-bms.jpg" alt="KI beobachtet"></div>'+ '<div class="szen szen-grid"><img class="szen-img" src="../img/szen-bms.jpg" alt="Szenario" loading="lazy"><div><p class="mon">Surveillance : continue · Écart sur les cycles</p>'+ '<p class="step-p"><b>Le scénario :</b></b> un écart croissant lentement reste sans protection jusqu’à ce que la capacité chute de manière significative.<br>'+ '<b>Die KI:</b> erkennt den stetigen Trend früh — Alterung wird planbar. <b>Sie erkennt den Trend, bevor der Grenzwert greift.</b></p></div></div>'+nav(3);} function step4(){return '<p class="step-kicker">Step 4 · Your benefit</p><h2 class="step-h">Why it matters</h2>'+ '<div class="benefit"><h3>Precise SoH monitoring minimises downtime and optimises the payback period through targeted maintenance intervals.</h3><p>Knowledge of the exact degradation state allows for precise calculation of the Remaining Useful Life (RUL). This ensures planning certainty for the profitability of the BESS throughout the entire project cycle.</p></div>'+ '<div class="calcbox"><p class="step-p">highest cell voltage (mV) <input id="c0" type="number" step="any" value="3320" oninput="r()"> · lowest (mV) <input id="c1" type="number" step="any" value="3290" oninput="r()"> → <b><span id="o" style="color:var(--accent)">—</span> mV spread</b></p>'+ '<p class="mon" style="margin-top:.5rem">Calculation: highest − lowest</p></div>'+nav(4);} function r(){var v=[];for(var i=0;i<2;i++){var e=document.getElementById('c'+i);v.push(e?parseFloat(e.value)||0:0);}'o');if(o)o.textContent=(Math.round(res*100)/100).toLocaleString('de-DE');}'body').innerHTML=state.step===1?step1():state.step===2?step2():state.step===3?step3():state.step===4?step4();'#steps .st').forEach(function(el){var n=+el.getAttribute('data-s');el.classList.toggle('on',n===state.step);el.classList.toggle('done',n<state.step);});'smooth'});} document.querySelectorAll('#steps .st').forEach(function(el){el.style.cursor='pointer';el.onclick=function(){go(+el.getAttribute('data-s'));};}); render(); </script></body></html>