{"id":18526,"date":"2024-11-22T10:43:20","date_gmt":"2024-11-22T09:43:20","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=18526"},"modified":"2026-06-12T07:32:55","modified_gmt":"2026-06-12T05:32:55","slug":"heating-with-photovoltaics","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/en\/heizen-mit-photovoltaik\/","title":{"rendered":"Heating with Photovoltaics: PV Power for Heat Pumps &amp; Infrared Heaters"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><em>(Updated April 2026)<\/em> Heating with photovoltaics uses self-generated solar power for electric heating systems and <strong>reduces energy costs by 30\u201360%<\/strong>. The combination with heat pumps or infrared heaters is particularly economical because self-generated electricity replaces expensive grid electricity and fossil fuels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This post shows why <a href=\"https:\/\/cubeconcepts.de\/en\/hall-heating-reduce-costs-increase-efficiency\/\" type=\"post\" id=\"18576\">Modern hall heating<\/a> When it's worthwhile, when it fits, and how companies can utilize grants.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why heating with PV becomes economical<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The feed-in tariff for solar power will be 7\u20139 cents per kWh in 2026, while grid electricity costs 25\u201335 cents per kWh. PV electricity used for personal consumption therefore saves 60\u201370 cents per kWh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In addition<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CO2 price rises (currently \u20ac55-65\/t, free trade from 2028)<\/li>\n\n\n\n<li>Fossil fuel heating costs are exploding.<\/li>\n\n\n\n<li>Self-consumption protects against price risks<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Result<\/strong>: Heating costs decrease by 40\u201360%, with a payback period of 5\u201310 years.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Which heating systems are suitable for solar PV?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Heat pumps<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ideal for<\/strong>Well-insulated offices, halls with underfloor heating, hot water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Advantages<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High efficiency (COP 3\u20135): 1 kWh electricity \u2192 3\u20135 kWh heat<\/li>\n\n\n\n<li>Heating + Cooling in one system<\/li>\n\n\n\n<li>Low flow temperatures (suitable for PV)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Costs<\/strong>: \u20ac10,000\u201325,000 (depending on size), funding up to 70% (KfW 458)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Infrared heaters<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ideal for<\/strong>High halls, workshops, warehouses \u2013 pinpoint-accurate heat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Advantages<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Direct radiant heat (no air heating)<\/li>\n\n\n\n<li>Easy Installation (Ceiling Mount)<\/li>\n\n\n\n<li>Fast heat-up time, zone-divisible<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Costs<\/strong>: \u20ac200 \u2013 \u20ac4,000 per device, low maintenance<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Economic Viability: Solar Heating vs. Gas<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example<\/strong>500 m\u00b2 hall, 50,000 kWh\/year heating demand with 24-hour operation<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>System<\/strong><\/td><td><strong>Annual Costs<\/strong><\/td><td><strong>Savings vs. Gas<\/strong><\/td><td><strong>Amortization<\/strong><\/td><\/tr><tr><td>Gas heating<\/td><td>\u20ac7,500 (\u20ac0.15\/kWh)<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><td>Heat pump + solar<\/td><td>3.500 \u20ac<\/td><td>4.000 \u20ac<\/td><td>6 \u2013 8 years<\/td><\/tr><tr><td>Infrared + PV<\/td><td>4.500 \u20ac<\/td><td>3.000 \u20ac<\/td><td>4 \u2013 6 Years<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Which companies is it worthwhile for?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Suitable<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Building renovator<\/strong>PV + heat pump during roof renovation<\/li>\n\n\n\n<li><strong>New construction<\/strong>Low-temperature heating + PV planning<\/li>\n\n\n\n<li><strong>Solar panel owner<\/strong>Use surplus electricity instead of feeding it into the grid<\/li>\n\n\n\n<li><strong>Hall operator<\/strong>Infrared for peak loads<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Optimal for:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High power consumption during the day<\/li>\n\n\n\n<li>Good insulation (heat pump)<\/li>\n\n\n\n<li>High Ceilings (Infrared)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Retrofit: Step by Step<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Analyze<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Determine heating demand (kWh\/year) <\/li>\n\n\n\n<li>Check PV potential (kWp) <\/li>\n\n\n\n<li>Economic feasibility study<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. System Selection<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>W\u00e4rmepumpe: COP &gt; 3,5, Vorlauf &lt; 35 \u00b0C <\/li>\n\n\n\n<li>Infrared: Power density 100\u2013200 W\/m\u00b2 <\/li>\n\n\n\n<li><a href=\"https:\/\/cubeconcepts.de\/en\/products\/cube-efficiencyunit\/\" type=\"page\" id=\"18381\">Energy management system<\/a> (EMS) for PV control<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Funding &amp; Support<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>KfW 458: Up to 70% grant <\/li>\n\n\n\n<li>Contracting: \u20ac0 in equity <\/li>\n\n\n\n<li>BAFA Consultation: 50\u201380 % eligible for funding<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. Installation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Phased retrofitting (no operational downtime) <\/li>\n\n\n\n<li>PV Integration (Zero Balance) <\/li>\n\n\n\n<li>Technical acceptance<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages at a glance<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Advantage<\/strong><\/td><td><strong>Heat pump + solar<\/strong><\/td><td><strong>Infrared + PV<\/strong><\/td><\/tr><tr><td>Efficiency<\/td><td>COP 3\u20135<\/td><td>Direct radiation<\/td><\/tr><tr><td>Costs \/ Year<\/td><td>Low<\/td><td>Varies depending on intensity<\/td><\/tr><tr><td>Promotion<\/td><td>High (70 %)<\/td><td>Middle<\/td><\/tr><tr><td>Flexibility<\/td><td>Central<\/td><td>Precisely<\/td><\/tr><tr><td>CO\u2082 savings<\/td><td>Very high<\/td><td>High<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Legal Framework 2026<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">After the new <strong>Heating Law<a href=\"https:\/\/cubeconcepts.de\/en\/from-the-geg-to-the-gmg\/\" type=\"post\" id=\"27258\">GMG<\/a>)<\/strong> fossil fuel heating systems are still permitted, but the CO\u2082 price (currently \u20ac55-65\/t and significantly more in the future) makes them more expensive.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Advantages of solar heating:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No green gas quota <\/li>\n\n\n\n<li>Regardless of CO\u2082 price development<\/li>\n\n\n\n<li>Funding secured until 2029<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/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>Is heating with solar PV worthwhile?<\/summary>\n<p class=\"wp-block-paragraph\">Ja, bei Eigenverbrauch &gt; 50%: 40\u201360% Kostensenkung vs. Gas\/Netzstrom.<\/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>Heat pump or infrared?<\/summary>\n<p class=\"wp-block-paragraph\">Heat pump for insulated low-ceiling rooms, infrared for halls.<\/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 is the subsidy?<\/summary>\n<p class=\"wp-block-paragraph\">KfW 458: Up to 70% for heat pumps, 0% VAT on PV.<\/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>Do I need an EMS?<\/summary>\n<p class=\"wp-block-paragraph\">Yes, for optimal PV utilization and funding eligibility.<\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Heating with solar power reduces energy costs by 30\u201360%, as self-generated electricity replaces expensive grid power and fossil fuels. While heat pumps stand out for their high efficiency (COP 3\u20135), infrared heaters provide targeted radiant heat in high-ceilinged spaces at low installation costs and with high flexibility.<\/p>","protected":false},"author":3,"featured_media":18560,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62,25],"tags":[],"class_list":["post-18526","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobilitaet-klimatisierung-sektorenkopplung","category-photovoltaik"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Heizen mit Photovoltaik: W\u00e4rmepumpe + PV \u2013 Wirtschaftlichkeit | CUBE CONCEPTS<\/title>\n<meta name=\"description\" content=\"Heizen mit Solarstrom: W\u00e4rmepumpe oder Infrarot? 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