KWK supplementary meter in a cogeneration plant: importance for the subsidy | Stromfeee="description" content="KWK supplementary meter in a cogeneration plant: importance for the subsidy The calibrated injection meter records the KWK kilowatt-hours for the purchase obligation (OA) / remuneration supplement (CR); correct installation of the meter and the calibration period are mandatory"> <link rel="canonical" href="https://stromfee-mauritius.ai/en/glaesern/cogeneration/wizards/kwk_zuschlag_zaehler/"> <script type="application/ld+json">{"@context": "https://schema.org", "@type": "Article", "headline": "KWK supplementary meter in a cogeneration plant: importance for the subsidy", "mainEntityOfPage": "/glaesern/cogeneration/wizards/kwk_zuschlag_zaehler.html", "description": "The calibrated injection meter records the fed-in KWK-kilowatt-hours for the obligation d'achat (OA) / complément de rémunération (CR) remuneration; correct meter installation and calibration period are conditions for the payout of the subsidy."}</script> <script type="application/ld+json">{"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What is a KWK supplementary meter?", "acceptedAnswer": {"@type": "Answer", "text": "A calibrated meter that measures specific KWK kilowatt-hours, which are relevant for the state subsidy according to the obligation d'achat (OA) / complément de rémunération (CR)."}}, {"@type": "Question", "name": "Why must the meter be calibrated?", "acceptedAnswer": {"@type": "Answer", "text": "Calibration is a legal requirement; only calibrated readings are accepted by grid operators and authorities for the payment of the subsidy."}}, {"@type": "Question", "name": "How is the live measured value used?", "acceptedAnswer": {"@type": "Answer", "text": "The current value (e.g. 30624) serves as a real-time indicator of production for the operator and for the validation of data transmission to the billing portal."}}, {"@type": "Question", "name": "From when is a new calibration required?", "acceptedAnswer": {"@type": "Answer", "text": "The calibration period must be checked regularly; an expired certificate results in the immediate suspension of the subsidy payment."}}, {"@type": "Question", "name": "What happens in case of meter failure?", "acceptedAnswer": {"@type": "Answer", "text": "A failure leads to gaps in billing, which jeopardises the reimbursement of the KWK supplements for the corresponding period."}}, {"@type": "Question", "name": "What is the difference with a normal injection meter?", "acceptedAnswer": {"@type": "Answer", "text": "The KWK supplementary meter is specifically designed to meet the requirements of the obligation d'achat (OA) / complément de rémunération (CR) and serves primarily to document cogeneration (Kraft-Wärme-Kopplung)."}}]}</script> 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class="wrap navrow"> <a class="brand" href="/glaesern/">◈ Transparent CHP</a> <nav class="nlinks"><a href="/glaesern/">All trades</a> <a href="/glaesern/cogeneration/wirtschaft.html"> Rentabilité </a></nav> <a class="navcta" href="#kontakt">Installation check →</a></div></header> <div class="hero-w"><h1>KWK supplementary meter</h1><p>Component wizard · Profitability</p> <div class="livebar"><span class="livedot"></span><b id="lcount2">…</b>Live values from the plant ·<span id="lts2"> verbinde… </span></div></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 AI does</div> <div class="st" data-s="4"><span class="no">4</span>Your profit</div> </div> <div id="body"></div> </div> <div class="sec"><h2>Diagram — Process & live sensors</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">Profitability — Process diagram</text><text x="20" y="48" font-size="10.5" fill="#86868b">orange = live sensor of the plant · flow from left to right</text><line x1="138" y1="152" x2="204" y2="152" stroke="#f97316" stroke-width="2.5" marker-end="url(#ar)"/><line x1="328" y1="152" x2="395" y2="152" stroke="#f97316" stroke-width="2.5" marker-end="url(#ar)"/><line x1="519" y1="152" x2="586" y2="152" stroke="#f97316" stroke-width="2.5" marker-end="url(#ar)"/><line x1="710" 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">Gas consumption</text></g><g><rect x="210" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="270" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f">BHKW</text><text x="270" y="170" text-anchor="middle" font-size="10.5" fill="#86868b"> Conversion </text></g><g><rect x="401" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="460" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f"> Électricité </text><text x="460" y="170" text-anchor="middle" font-size="10.5" fill="#86868b">→ Grid/EVU</text></g><g><rect x="592" y="120" width="118" height="64" rx="12" fill="url(#bx)" stroke="#fdba74" stroke-width="1.5"/><text x="650" y="148" text-anchor="middle" font-size="13" font-weight="700" fill="#1d1d1f"> Wärme </text><text x="650" y="170" text-anchor="middle" font-size="10.5" fill="#86868b">→ Usage</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"><tspan x="841" dy="-4"></tspan><tspan x="841" dy="14">Gross margin</tspan></text></g><line x1="79" y1="120" x2="79" y2="88" stroke="#ea580c" stroke-width="1.5" stroke-dasharray="3 2"/><circle cx="79" cy="120" r="3.5" fill="#ea580c"/><g transform="translate(79,58)"><rect x="-52" y="0" width="104" height="30" rx="8" fill="#fff" stroke="#ea580c" stroke-width="1"/><text x="0" y="12" text-anchor="middle" font-size="8.5" fill="#86868b"> Gaz </text><text x="0" y="25" text-anchor="middle" font-size="12" font-weight="700" fill="#ea580c" class="svlive" data-k="sbhkw2_rgasmenge" data-u="m³/h">…</text></g><line x1="460" y1="120" x2="406" y2="88" stroke="#ea580c" stroke-width="1.5" stroke-dasharray="3 2"/><circle cx="460" cy="120" r="3.5" fill="#ea580c"/><g transform="translate(406,58)"><rect x="-52" y="0" width="104" height="30" rx="8" fill="#fff" stroke="#ea580c" stroke-width="1"/><text x="0" y="12" text-anchor="middle" font-size="8.5" fill="#86868b"> Électricité </text><text x="0" y="25" text-anchor="middle" font-size="12" font-weight="700" fill="#ea580c" class="svlive" data-k="sbhkw2_ristleist" data-u="kW">…</text></g><line x1="460" y1="120" x2="514" y2="88" stroke="#ea580c" stroke-width="1.5" stroke-dasharray="3 2"/><circle cx="460" cy="120" r="3.5" fill="#ea580c"/><g transform="translate(514,58)"><rect x="-52" y="0" width="104" height="30" rx="8" fill="#fff" stroke="#ea580c" stroke-width="1"/><text x="0" y="12" text-anchor="middle" font-size="8.5" fill="#86868b"> Travail </text><text x="0" y="25" text-anchor="middle" font-size="12" font-weight="700" fill="#ea580c" class="svlive" data-k="sbhkw2_udiwirkarbeit" data-u="MWh">…</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 · Plant PLC · M-Bus (meters)</b>of the plant —<b>read, not checked</b>. Everything is<b>in the house</b>calculated, nothing leaves the house. No obligation to disclose operational data.</p></div><div class="block"><h3>Your own LLM for BHKW — offline</h3><p class="step-p">Questions in common language, answered by<b>Your own installation data</b>— local, without cloud. The AI runs internally; the installation remains yours.</p></div><div class="note"><b>Regulatory framework:</b>purchase obligation (OA) / remuneration supplement (CR) 2023 · VDI 4608 (energy assessment)</div><div class="block"><h3>Associated causal chains</h3><p class="step-p">This component is part of<a href="https://bhkw-anlagen.com/kausalketten.html" style="color:var(--accent)">Installation causal chains</a>— from cause to effect (gas quality → engine → exhaust gas → heat → efficiency). The AI reads the entire chain, not just the individual value.</p></div><div class="block"><h3>Link with the entire installation</h3><p class="step-p">A BHKW is never alone: electricity, heat and gas are linked, and with PV and battery storage, it becomes a system. The AI calculates 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)">BESS transparent →</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 a KWK supplement meter?</summary><div class="faq-a">A calibrated meter that measures specific KWK kilowatt-hours, which are relevant for the state subsidy according to the purchase obligation (OA) / remuneration supplement (CR).</div></details><details><summary>Why must the meter be calibrated?</summary><div class="faq-a">Calibration is a legal requirement; only calibrated readings are accepted by grid operators and authorities for the payment of the subsidy.</div></details><details><summary>How is the live measured value used?</summary><div class="faq-a">The current value (e.g. 30624) serves the operator as a real-time indicator of production and for the validation of data transmission to the billing portal.</div></details><details><summary>From when is a new calibration required?</summary><div class="faq-a">The calibration period must be checked regularly; an expired certificate leads to the immediate stop of subsidy payments.</div></details><details><summary>What happens in case of meter failure?</summary><div class="faq-a">A failure results in gaps in billing, which jeopardizes the reimbursement of KWK supplements for the corresponding period.</div></details><details><summary>What is the difference with a normal injection meter?</summary><div class="faq-a">The KWK supplement meter is specifically designed to meet the requirements of the purchase obligation (OA) / remuneration supplement (CR) and serves primarily for the documentation of cogeneration (Kraft-Wärme-Kopplung).</div></details></div> <footer class="site"><div class="wrap"> <div class="fbrand">◈ BHKW transparent</div> <p class="fclaim">Connected in read-only mode · local calculation · without cloud. The installation remains at your site.</p> <nav class="flinks"><a href="/glaesern/">All trades</a> <a href="/glaesern/cogeneration/wirtschaft.html"> Rentabilité </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)">Next</button>'; return '<div class="wiz-nav">'+b+n+'</div>';} function step1(){return '<div class="step-grid"><img class="step-img" src="../img/kwk_zuschlag_zaehler.jpg" alt="KWK supplementary meter">'+ '<div><p class="step-kicker">Step 1 · Understand</p><h2 class="step-h">What is a KWK supplementary meter?</h2>'+ '<p class="step-p">The certified feed-in meter records the injected KWK kilowatt-hours for the obligation d'achat (OA) / complément de rémunération (CR)-Vergütung; korrekte Zählerinstallation und Eichfrist sind Bedingung für die Förderauszahlung.</p></div></div>'+nav(1);}'<p class="step-kicker">Schritt 2 · Live sehen</p><h2 class="step-h">Die Anlage — jetzt gerade</h2><div class="live-head"><span class="livedot"></span><span class="live-status" id="lstatus"> verbinde… </span><span class="live-sub">· anonyme Referenzanlage · read-only vom Prozessleitsystem, im Haus gerechnet</span></div><div class="kpis"><div class="kpi" data-k="sbhkw2_ristleist"><div class="kl">Active power</div><div class="kval"><span class="v">…</span><span class="ku">kW</span></div><div class="spark"></div></div><div class="kpi hl" data-k="sbhkw2_udiwirkarbeit"><div class="kl">Work output</div><div class="kval"><span class="v">…</span><span class="ku">MWh</span></div><div class="spark"></div></div><div class="kpi" data-k="sbhkw2_udigaszaehler"><div class="kl">Gas meter</div><div class="kval"><span class="v">…</span><span class="ku">m³</span></div><div class="spark"></div></div><div class="kpi" data-k="sbhkw2_rgasmenge"><div class="kl">Gas quantity</div><div class="kval"><span class="v">…</span><span class="ku">m³/h</span></div><div class="spark"></div></div></div><p class="step-p" style="margin-top:1rem">Excerpt from <b id="lcount">…</b> measurement values of the system. For the detailed <a href="https://bhkw-anlagen.com/erklaervideo/kwk_zuschlag_zaehler.html" style="color:var(--accent)">explanation page with video →</a></p>'+nav(2);}"step-grid"><div><p class="step-kicker">Step 3 · What the AI does</p>'+"step-h">What the AI reads from these values</h2><ul class="chk">'+li('Kilowatt-hours KWK injected as a <b>basis for calculating the subsidy</b>')+li('Verification of the <b>calibration validity</b> to avoid payment losses')+li('Comparison of the live measured value (reference: 30624) for <b>system monitoring</b>')+li('Detection of discrepancies between thermal and electrical power')+'</ul></div>'+"step-img" src="../img/ki-wirtschaft.jpg" alt="KI beobachtet"></div>'+"szen szen-grid"><img class="szen-img" src="../img/szen-wirtschaft.jpg" alt="Szenario" loading="lazy"><div><p class="mon">Monitored: continuously · Indicator relative to requirement</p>'+"step-p"><b>The scenario:</b> if the CHP unit operates independently of heat or price, profitability decreases and gross margin is lost every hour.<br>'+"step-kicker">Step 4 · Your profit</p><h2 class="step-h">Why it matters</h2>'+"benefit"><h3>Correct monitoring of the CHP surcharge meter ensures the legally secure receipt of state subsidies.</h3><p>Precise meter monitoring prevents miscalculations in the billing of feed-in tariffs. Furthermore, it enables early identification of measurement errors or expired calibration periods.</p></div>'+"calcbox"><p class="step-p">electrical power (kW) <input id="c0" type="number" step="any" value="400" oninput="r()"> · thermal power (kW) <input id="c1" type="number" step="any" value="450" oninput="r()"> → <b><span id="o" style="color:var(--accent)">—</b> σ (Power factor)</b></p>'+"mon" style="margin-top:.5rem">Rechenweg: elektrische ÷ thermische Leistung</p></div>'+nav(4);}'c'+1);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():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'));};});'https://bhkw-anlagen.com/data/sensor-live.json',HURL='https://bhkw-anlagen.com/data/sensor-history.json',LKEY='sbhkw2_udiwirkarbeit',LIVEDATA=null,HISTDATA=null;function fmtAge(a){return a<90?('vor '+a+' s'):('vor '+Math.round(a/60)+' min');}function fmt(v){return (typeof v==='number')?(Math.round(v*100)/100).toLocaleString('de-DE'):v;}function spark(el,ser){if(!ser||!ser.length)return;var nz=ser.filter(function(x){return x!==0;});if(nz.length<2){el.innerHTML='';return;}var mn=Math.min.apply(0,ser),mx=Math.max.apply(0,ser),rg=(mx-mn)||1;var n=ser.length,w=100,h=26,pts=ser.map(function(y,i){return (i/(n-1)*w).toFixed(1)+','+(h-2-(y-mn)/rg*(h-4)).toFixed(1);}).join(' ');el.innerHTML='<svg viewBox=\'0 0 '+w+' '+h+'\' preserveAspectRatio=\'none\' style=\'width:100%;height:100%\'>'+'<polyline fill=\'none\' stroke=\'#f97316\' stroke-width=\'1.5\' points=\''+pts+'\'/></svg>';}window.__fillLive=function(){var d=LIVEDATA;if(!d)return;var c=d.count||Object.keys(d.sensors||{}).length;var e=document.getElementById('lcount2');if(e)e.textContent=c;var e2=document.getElementById('lcount');if(e2)e2.textContent=c;var st=document.getElementById('lstatus');document.querySelectorAll('.kpi[data-k]').forEach(function(card){var k=card.dataset.k;var s=d.sensors&&d.sensors[k];var vel=card.querySelector('.v');if(s&&vel)vel.textContent=fmt(s.v);if(HISTDATA&&HISTDATA.sensors){spark(card.querySelector('.spark'),HISTDATA.sensors[k]);}});document.querySelectorAll('.svlive[data-k]').forEach(function(el){var k=el.dataset.k;var s=d.sensors&&d.sensors[k];if(s)el.textContent=fmt(s.v)+(el.dataset.u?(' '+el.dataset.u):'');});var s0=d.sensors&&d.sensors[LKEY];if(st)st.textContent=(s0?('Anlage läuft · '+fmtAge(s0.age||0)):'Anlage');var t2=document.getElementById('lts2');if(t2)t2.textContent='aktualisiert '+fmtAge((s0&&s0.age)||0);var lv=document.getElementById('lv');if(lv&&s0){lv.textContent=fmt(s0.v)+(s0.u?(' '+s0.u):'');}var ll=document.getElementById('ll');if(ll&&s0)ll.textContent=s0.l||LKEY;var lt=document.getElementById('lts');if(lt&&s0)lt.textContent='Stand '+(s0.ts||'')+' · '+fmtAge(s0.age||0);};function pullLive(){fetch(LURL,{cache:'no-store'}).then(function(r){return r.json();}).then(function(d){LIVEDATA=d;window.__fillLive();}).catch(function(){var t=document.getElementById('lstatus');if(t)t.textContent='Live nicht erreichbar';});}if(HURL){fetch(HURL,{cache:'no-store'}).then(function(r){return r.json();}).then(function(d){HISTDATA=d;window.__fillLive();}).catch(function(){});}pullLive();setInterval(pullLive,30000); </script></body></html>