Solar Thermal | K-E<\/title>\n\n <meta name=\"description\" content=\"Solar thermal energy for homes and businesses: hot water, heating\/ventilation, industrial heat, and photovoltaic\/thermal (PV\/T) systems. Design, installation, financing solutions, and payback periods of 3\u20136 years for suitable applications.\" \/>\n <meta name=\"robots\" content=\"index, follow\" \/>\n\n \n <meta property=\"og:title\" content=\"Solar Thermal\" \/>\n <meta property=\"og:description\" content=\"Harness the sun for heat and reduce fuel\/electricity costs \u2014 in your home, hotel, small business, livestock farm, or industrial facility. We combine solar thermal and photovoltaic systems, with careful planning and quick payback.\" \/>\n <meta property=\"og:type\" content=\"website\" \/>\n\n <style>\n :root{ --max: 980px; --pad: 18px; }\n body{ font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin:0; color:#111; line-height:1.65; }\n header{color:#000; padding:42px var(--pad); }\n header .wrap{ max-width: var(--max); margin:0 auto; }\n header h1{ margin:0 0 10px; font-size: clamp(28px, 3vw, 42px); line-height:1.15; }\n header p{ margin:0; max-width: 70ch; opacity:.92; }\n main{ padding: 28px var(--pad) 60px; }\n main .wrap{ max-width: var(--max); margin:0 auto; }\n .lead{ font-size: 1.06rem; max-width: 78ch; }\n .grid{ display:grid; gap: 18px; grid-template-columns: 1.1fr .9fr; }\n @media (max-width: 900px){ .grid{ grid-template-columns: 1fr; } }\n .card{ border:1px solid #e7e7e7; border-radius: 14px; padding: 16px; background:#fff; }\n h2{ margin-top: 34px; font-size: 1.6rem; }\n h3{ margin-top: 22px; font-size: 1.2rem; }\n ul{ padding-left: 18px; }\n .kpi{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }\n @media (max-width: 700px){ .kpi{ grid-template-columns: 1fr; } }\n .kpi .box{ border:1px solid #eee; border-radius: 14px; padding: 14px; background:#fafafa; }\n figure{ margin: 16px 0; }\n figure img{ width:100%; height:auto; border-radius: 14px; border:1px solid #eee; }\n figcaption{ font-size: .92rem; color:#444; margin-top: 8px; }\n .cta{ background:#f6f8ff; border:1px solid #e3e7ff; border-radius: 16px; padding: 18px; }\n .cta strong{ display:block; font-size: 1.1rem; margin-bottom: 8px; }\n .badge{ display:inline-block; padding: 6px 10px; border-radius: 999px; background:#002160; color:#fff; font-size:.85rem; margin: 12px 0 0; }\n .note{ font-size:.95rem; color:#333; background:#fff7ed; border:1px solid #fed7aa; padding:12px 14px; border-radius: 14px; }\n .hr{ height:1px; background:#eee; margin: 26px 0; }\n a{ color: inherit; }\n <\/style>\n<\/head>\n\n<body>\n <header>\n <div class=\"wrap\">\n\t\t\t<h1>Solar Thermal<\/h1>\n <p>\n Heat from the sun for hot water, Heating\/ventilation and industrial uses, with a study that \"fits\" the actual consumption profile and reduces fuel and electricity.\n <\/p>\n <span class=\"badge\">Hot water \u2022 Heating \u2022 Industrial Heating \u2022 Thermophotovoltaics (PV\/T)<\/span>\n <\/div>\n <\/header>\n\n <main>\n <div class=\"wrap\">\n\n <p class=\"lead\">\n Solar thermal energy is the \"quiet\" superpower of the energy transition: it converts solar radiation directly into <strong>useful heat<\/strong> (water or air), exactly where it is consumed. And in Greece, there is a special reason to trust it: for decades, the <strong>Greek solar water heater industry<\/strong> has been a global benchmark, not as a fashion, but as an everyday practice that filled rooftops, islands, and cities with proven savings.\n This \u201cDNA\u201d of experience is invaluable today, because the need for cheap, clean heat is greater than ever.\n <\/p>\n\n <div class=\"grid\">\n <div class=\"card\">\n\t\t\t\t\t<h3><span style=\"color: #339966;\"><strong>What we achieve with a well-designed solution<\/strong><\/span><\/h3>\n <ul>\n <li>- Reduction of fuel costs (oil, LPG, natural gas, biomass) for the production of domestic hot water and\/or heat.<\/li>\n <li>- Reduction of electricity consumption in systems where heat is produced electrically (electric resistance heaters, heat pumps).<\/li>\n <li>- Stabilization of energy costs and protection against price volatility.<\/li>\n <li>- Additional performance\/efficiency \u201clever\u201d when combined with photovoltaic systems and smart load management.<\/li>\n <\/ul>\n <\/div>\n\n <div class=\"card\">\n\t\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Where it suits best<\/strong><\/span><\/h3>\n <ul>\n <li>- Residential buildings (domestic hot water, space-heating assistance, swimming pools).<\/li>\n <li>- Hotels \/ accommodation facilities (high and steady domestic hot water demand).\n <li>- Workshops & industrial facilities (preheating, low- and medium-temperature processes).<\/li>\n <li>- Livestock and agricultural units (hot water, ventilation, drying).<\/li>\n <li>- Sports centers, hospitals, nursing homes, and other facilities with continuous thermal loads.<\/li>\n \t<\/ul>\n <\/div>\n <\/div>\n \n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/d\/d3\/Solar_panels_%282%29%2C_Santorini.jpg\"\n alt=\"Solar thermal systems on rooftops (Greece)\"\n loading=\"lazy\"\n \/>\n <figcaption>\n Solar thermal systems on rooftops \u2014 a characteristic image of the penetration of solar thermal energy in Greece. Source (CC BY-SA)\n <\/figcaption>\n <\/figure>\n\n\t\t\t<blockquote>\n<h2><strong><span style=\"color: #000080;\">\u00a0 How does the Solar Thermal Energy work<\/span><\/strong><\/h2>\n <\/blockquote>\n <p>\n In contrast to electricity generation, solar thermal technology \u2018takes a shortcut\u2019: it absorbs solar radiation and converts it directly into heat with very high efficiency. In practice, a collector heats a fluid (water or a water\/glycol mixture) or preheats air. The heat is stored in a tank (boiler\/storage tank) or used directly (e.g. preheating ventilation air).\n <\/p>\n\n <div class=\"kpi\">\n <div class=\"box\">\n <strong>Solar Thermal Collector<\/strong><br\/>\n Flat-plate, evacuated-tube, air (solar air heater), or concentrating (for higher-temperature applications).\n <\/div>\n <div class=\"box\">\n <strong>Storage<\/strong><br\/>\n Domestic hot water (DHW) tank, heating buffer tank, or process storage tank. Storage is the \u201csecret\u201d to stability.\n <\/div>\n <div class=\"box\">\n <strong>Control<\/strong><br\/>\n Circulation pumps, sensors, antifreeze protection, weather compensation, and control logic that prevents stagnation and overheating.\n <\/div>\n <\/div>\n\n\t\t\t<h3><span style=\"color: #339966;\"><strong>The main types of systems<\/strong><\/span><\/h3>\n <ul>\n <li><strong>* Water Heater Systems<\/strong> (classic, simple, very widespread): circulation is by natural flow.<\/li>\n <li><strong>* Forced circulation<\/strong> (with controller): better flexibility, larger installations, larger tanks.<\/li>\n <li><strong>* Drainback<\/strong> (self-draining): reduces risks of frost\/stagnation where hydraulically suitable.<\/li>\n <li><strong>* Solar air preheating<\/strong> for ventilation\/heating (ideal in industrial and agricultural buildings).<\/li>\n <li><strong>* Concentrated solar thermal<\/strong> for medium\/high temperature heat production (special industrial applications).<\/li>\n <\/ul>\n \n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/5\/52\/Solar_vacuum_tube_collectors_Thessaloniki.jpg\"\n alt=\"Solar vacuum tube collectors\"\n loading=\"lazy\"\n \/>\n <figcaption style=\"size: 40%;\">\n Evacuated-tube solar thermal collectors \u2014 high efficiency, especially under windy conditions and at lower temperatures. Source (CC BY-SA)\n <\/figcaption>\n <\/figure>\n\t\t\t\t \n<blockquote>\n\t<h2><strong><span style=\"color: #000080;\">\u00a0 Developments and modern applications<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n Solar thermal has evolved far beyond the \u201csimple\u201d water heater. Today we see:\n <\/p>\n <ul>\n <li><strong>* Better selective coatings<\/strong> and thermal insulation that increase efficiency and reduce losses.<\/li>\n <li><strong>* Large-scale systems<\/strong> for hotels, industries and facilities with continuous consumption.<\/li>\n <li><strong>* Solar district heating<\/strong> and large thermal fields with storage tanks.<\/li>\n <li><strong>* Solar thermal for industrial heat<\/strong>: process water preheating, washing, pasteurization, CIP, drying.<\/li>\n <li><strong>* Connection to heat pumps<\/strong>: the sun preheats the circuit and the heat pump \u201csteps up\u201d when needed.<\/li>\n <\/ul>\n \n <div class=\"note\">\n <strong>Why is it important;<\/strong><br\/>\n A large part of the final energy consumption in buildings and industry is <em>heat<\/em>. Solar thermal responds directly to this, with low complexity and long lifespan.\n <\/div>\n\t\t\t\t \n<blockquote>\n\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Savings in housing<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n At home, the most efficient application is <strong>domestic hot water (DHW)<\/strong>. In this case, solar thermal systems can cover a significant part of the annual needs, especially in areas with high sunshine. When the house also has heating needs, solar thermal can operate in an auxiliary role (with appropriate emitters and hydraulics), reducing boiler operation or the electrical consumption of a heat pump.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>What we evaluate to ensure economic viability<\/strong><\/span><\/h3>\n <ul>\n <li>- Daily\/seasonal DHW and heat consumption profile.<\/li>\n <li>- Available surface, orientation, slope, shading, wind\/salinity (coastal areas).<\/li>\n <li>- Collector type and desired temperatures.<\/li>\n <li>- Storage volume and strategy (how many hours\/days of autonomy).<\/li>\n <li>- Backup (boiler\/heat pump\/electric resistance) and automation.<\/li>\n <\/ul>\n\n\n <div class=\"hr\"><\/div>\n<blockquote>\n\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Energy savings in commercial buildings and production<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n Where solar thermal truly becomes a \u201cchampion\u201d is in buildings with <strong>constant and increased heat demand<\/strong>.\nExamples:\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Hotels & tourism<\/strong><\/span><\/h3>\n <p>\n DHW in hotels (showers, kitchens, laundry rooms, swimming pools\/spas) has high consumption, especially during periods of high sunshine. This makes solar thermal ideal: it \u201cworks\u201d when you need it most, drastically reducing oil\/LPG\/electricity.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Factories, crafts, laundries, food & beverages<\/strong><\/span><\/h3>\n <p>\n Many processes require hot water or low\/medium temperature heat: washing, preheating, cleaning, product preparation, drying. Solar energy can act as preheating which reduces boiler loading, improving overall production costs.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Livestock units & agricultural applications<\/strong><\/span><\/h3>\n <p>\n In livestock and agricultural facilities, heat is not a luxury: it is hygiene, productivity and quality.\n Hot water for washing\/disinfection, preheating of ventilation air, heating of spaces where required, and drying applications.\n Solar thermal energy in the air (solar air heaters) can dramatically reduce the cost of ventilation\/heating in large buildings.\n <\/p>\n\n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/2\/25\/Installation_of_%22Solar_roof%22_solar_thermal_installation_for_small_district_heating_plant_serving_several_homes.jpg\"\n alt=\"Installation of large-scale solar thermal collectors\"\n loading=\"lazy\"\n \/>\n <figcaption>\n Installation of solar thermal collectors for a small district heating unit\/multiple dwellings. Source (CC BY-SA)\n <\/figcaption>\n <\/figure>\n \n\t\t\t\t<blockquote>\n\t\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 The added benefit of thermal photovoltaics (PV\/T)<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n Thermal photovoltaics (PV\/T) combine <strong>electricity generation and heat generation<\/strong> from the same surface. The idea is simple: a photovoltaic panel converts part of the radiation into electricity, but a large part \u201cleaks\u201d as heat. In PV\/T, this heat is collected (with water or air) and utilized, while cooling the photovoltaic surface helps the electrical efficiency to remain better at high temperatures.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Where they offer practical advantages<\/strong><\/span><\/h3>\n <ul>\n <li><strong>* Limited space<\/strong>: when the roof\/facade does not \u201cfit\u201d both the thermal and photovoltaic field.<\/li>\n <li><strong>* Parallel need<\/strong> for electricity and heat (DHW, preheating, heat pump support).<\/li>\n <li><strong>* Heat pump systems<\/strong>: PV\/T can provide a \u201csource\u201d of heat or preheating, reducing consumption.<\/li>\n <li><strong>* Ventilation\/air conditioning<\/strong> in large buildings: PV\/T air can preheat fresh air and save fuel.<\/li>\n <\/ul>\n \n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/www.pv-magazine.com\/wp-content\/uploads\/2024\/07\/1-s2.0-S0360544224022291-gr3_lrg-1536x1342.jpg\"\n alt=\"Schematic PV\/T system with heat pump and storage\"\n loading=\"lazy\"\n \/>\n <figcaption>\n Example of a PV\/T architecture combined with a heat pump and thermal storage (schematic).Source (CC BY 4.0)\n <\/figcaption>\n <\/figure>\n \n<blockquote>\n\t<h2><strong><span style=\"color: #000080;\">\u00a0 How to combine solar thermal and photovoltaics in practice<\/span><\/strong><\/h2>\n\t\t\t<\/blockquote>\n <p>\n The real value is not to \u201cput both\u201d, but to <strong>combine them correctly<\/strong>:\n <\/p>\n <ul>\n <li><strong>* Energy mapping<\/strong>: hourly\/daily profile of heat and electricity loads.<\/li>\n <li><strong>* Heat targeting<\/strong>: DHW, processes, preheating, heating support \u2014 where efficiency\/economy is maximum.<\/li>\n <li><strong>* Electricity targeting<\/strong>: self-consumption, smart load management, storage where needed.<\/li>\n <li><strong>* Integrated automation<\/strong>: priorities, thermal storage, pump control\/compensation, waste avoidance.<\/li>\n <li><strong>* Mechanical\/hydraulic quality<\/strong>: correct cross-sections, hydraulic balancing, anti-freeze\/anti-corrosion protection, maintainability.<\/li>\n <\/ul>\n\n <div class=\"cta\">\n <strong>Result: less fuel, less electricity, faster payback<\/strong>\n <p style=\"margin:0\">\n In facilities with constant heat demand (e.g. hotels, laundries, crafts, livestock) the combination of solar thermal + photovoltaics often leads to\n\t\t\t\t\t<strong> a short payback period of 3\u20136 years<\/strong>, when the study is based on real consumption data and the appropriate mix of technologies\/storage.\n <\/p>\n <p style=\"margin:10px 0 0\">\n In addition, we can structure <strong>financing solutions<\/strong> (e.g. installments\/equipment financing, energy service, contracts with a fixed price per kWh of heat\/electricity where applicable), so that the project is paid for by the savings itself.\n <\/p>\n <\/div>\n \n\t\t\t\t<blockquote>\n\t\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Quality, documentation and reliability<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n In energy technology, performance is necessary but not sufficient. The market (and especially professional applications) demands documentation, certifications, measurability and transparency. At the European policy level, frameworks have been developed for evaluating \u201cgreen\u201d technologies and verifying claims by third parties, so that investments are based on real data rather than promises.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Our approach<\/strong><\/span><\/h3>\n <ul>\n <li><strong>* Study based on data<\/strong> (consumption, temperatures, operating hours, actual fuel\/invoices).<\/li>\n <li><strong>* Design for maintenance<\/strong> (easy access, spares, avoidance of \"hidden\" failures).<\/li>\n <li><strong>* Measurements & monitoring<\/strong> where required (heat metering, production, savings KPI).<\/li>\n <li><strong>* Realistic business case<\/strong>: price scenarios, seasonality, storage, financing.<\/li>\n <\/ul>\n \n\t\t\t\t<blockquote>\n\t\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Frequently asked questions (FAQ)<\/span><\/strong><\/h2>\n<\/blockquote>\n <h3><span style=\"color: #339966;\"><strong>Does solar thermal energy work in winter?<\/strong><\/span><\/h3>\n <p>\n Yes. Production is lower than in summer (less radiation and greater losses), but it remains useful, especially when there is adequate storage capacity and the right temperature strategy.\n <\/p>\n\n <h3><span style=\"color: #339966;\"><strong>Which is more important: the collector or the storage?<\/strong><\/span><\/h3>\n <p>\n Both. However, storage and automation are often the \"hidden\" factors that make a system perform consistently and not waste energy.\n <\/p>\n\n <h3><span style=\"color: #339966;\"><strong>Can it be combined with a heat pump?<\/strong><\/span><\/h3>\n <p>\n Yes, and it is often a very efficient combination. Solar thermal energy and\/or PV\/T can preheat the circuit, reducing the work of the heat pump and its electricity consumption.\n <\/p>\n\n <h3><span style=\"color: #339966;\"><strong>What do I need to get a quotation?<\/strong><\/span><\/h3>\n <p>\n Ideally: (a) recent electricity and fuel bills, (b) a brief description of heat uses (DHW\/washing\/processes), (c) photos\/drawing of the roof or available surface area, (d) operating hours and seasonality.\n <\/p>\n\n <div class=\"hr\"><\/div>\n\n <div class=\"cta\">\n <strong>Would you like a solar thermal or PV\/T study for your installation?<\/strong>\n <p style=\"margin:0\">\n Contact us for a targeted pre-assessment: savings estimate, proposed architecture, and implementation plan with realistic payback period.\n <\/p>\n <p style=\"margin:10px 0 0\">\n <\/p>\n <\/div>\n\t\n <\/div>\n <\/main>\n<\/body>\n<\/html>\n<\/div><\/div><\/div><\/div><div id=\"pg-13912-2\" class=\"panel-grid panel-no-style\" ><div id=\"pgc-13912-2-0\" 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\n\n\n \n \n Solar Thermal | K-E<\/title>\n\n <meta name=\"description\" content=\"Solar thermal energy for homes and businesses: hot water, heating\/ventilation, industrial heat, and photovoltaic\/thermal (PV\/T) systems. Design, installation, financing solutions, and payback periods of 3\u20136 years for suitable applications.\" \/>\n <meta name=\"robots\" content=\"index, follow\" \/>\n\n \n <meta property=\"og:title\" content=\"Solar Thermal\" \/>\n <meta property=\"og:description\" content=\"Harness the sun for heat and reduce fuel\/electricity costs \u2014 in your home, hotel, small business, livestock farm, or industrial facility. We combine solar thermal and photovoltaic systems, with careful planning and quick payback.\" \/>\n <meta property=\"og:type\" content=\"website\" \/>\n\n <style>\n :root{ --max: 980px; --pad: 18px; }\n body{ font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin:0; color:#111; line-height:1.65; }\n header{color:#000; padding:42px var(--pad); }\n header .wrap{ max-width: var(--max); margin:0 auto; }\n header h1{ margin:0 0 10px; font-size: clamp(28px, 3vw, 42px); line-height:1.15; }\n header p{ margin:0; max-width: 70ch; opacity:.92; }\n main{ padding: 28px var(--pad) 60px; }\n main .wrap{ max-width: var(--max); margin:0 auto; }\n .lead{ font-size: 1.06rem; max-width: 78ch; }\n .grid{ display:grid; gap: 18px; grid-template-columns: 1.1fr .9fr; }\n @media (max-width: 900px){ .grid{ grid-template-columns: 1fr; } }\n .card{ border:1px solid #e7e7e7; border-radius: 14px; padding: 16px; background:#fff; }\n h2{ margin-top: 34px; font-size: 1.6rem; }\n h3{ margin-top: 22px; font-size: 1.2rem; }\n ul{ padding-left: 18px; }\n .kpi{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }\n @media (max-width: 700px){ .kpi{ grid-template-columns: 1fr; } }\n .kpi .box{ border:1px solid #eee; border-radius: 14px; padding: 14px; background:#fafafa; }\n figure{ margin: 16px 0; }\n figure img{ width:100%; height:auto; border-radius: 14px; border:1px solid #eee; }\n figcaption{ font-size: .92rem; color:#444; margin-top: 8px; }\n .cta{ background:#f6f8ff; border:1px solid #e3e7ff; border-radius: 16px; padding: 18px; }\n .cta strong{ display:block; font-size: 1.1rem; margin-bottom: 8px; }\n .badge{ display:inline-block; padding: 6px 10px; border-radius: 999px; background:#002160; color:#fff; font-size:.85rem; margin: 12px 0 0; }\n .note{ font-size:.95rem; color:#333; background:#fff7ed; border:1px solid #fed7aa; padding:12px 14px; border-radius: 14px; }\n .hr{ height:1px; background:#eee; margin: 26px 0; }\n a{ color: inherit; }\n <\/style>\n<\/head>\n\n<body>\n <header>\n <div class=\"wrap\">\n\t\t\t<h1>Solar Thermal<\/h1>\n <p>\n Heat from the sun for hot water, Heating\/ventilation and industrial uses, with a study that \"fits\" the actual consumption profile and reduces fuel and electricity.\n <\/p>\n <span class=\"badge\">Hot water \u2022 Heating \u2022 Industrial Heating \u2022 Thermophotovoltaics (PV\/T)<\/span>\n <\/div>\n <\/header>\n\n <main>\n <div class=\"wrap\">\n\n <p class=\"lead\">\n Solar thermal energy is the \"quiet\" superpower of the energy transition: it converts solar radiation directly into <strong>useful heat<\/strong> (water or air), exactly where it is consumed. And in Greece, there is a special reason to trust it: for decades, the <strong>Greek solar water heater industry<\/strong> has been a global benchmark, not as a fashion, but as an everyday practice that filled rooftops, islands, and cities with proven savings.\n This \u201cDNA\u201d of experience is invaluable today, because the need for cheap, clean heat is greater than ever.\n <\/p>\n\n <div class=\"grid\">\n <div class=\"card\">\n\t\t\t\t\t<h3><span style=\"color: #339966;\"><strong>What we achieve with a well-designed solution<\/strong><\/span><\/h3>\n <ul>\n <li>- Reduction of fuel costs (oil, LPG, natural gas, biomass) for the production of domestic hot water and\/or heat.<\/li>\n <li>- Reduction of electricity consumption in systems where heat is produced electrically (electric resistance heaters, heat pumps).<\/li>\n <li>- Stabilization of energy costs and protection against price volatility.<\/li>\n <li>- Additional performance\/efficiency \u201clever\u201d when combined with photovoltaic systems and smart load management.<\/li>\n <\/ul>\n <\/div>\n\n <div class=\"card\">\n\t\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Where it suits best<\/strong><\/span><\/h3>\n <ul>\n <li>- Residential buildings (domestic hot water, space-heating assistance, swimming pools).<\/li>\n <li>- Hotels \/ accommodation facilities (high and steady domestic hot water demand).\n <li>- Workshops & industrial facilities (preheating, low- and medium-temperature processes).<\/li>\n <li>- Livestock and agricultural units (hot water, ventilation, drying).<\/li>\n <li>- Sports centers, hospitals, nursing homes, and other facilities with continuous thermal loads.<\/li>\n \t<\/ul>\n <\/div>\n <\/div>\n \n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/d\/d3\/Solar_panels_%282%29%2C_Santorini.jpg\"\n alt=\"Solar thermal systems on rooftops (Greece)\"\n loading=\"lazy\"\n \/>\n <figcaption>\n Solar thermal systems on rooftops \u2014 a characteristic image of the penetration of solar thermal energy in Greece. Source (CC BY-SA)\n <\/figcaption>\n <\/figure>\n\n\t\t\t<blockquote>\n<h2><strong><span style=\"color: #000080;\">\u00a0 How does the Solar Thermal Energy work<\/span><\/strong><\/h2>\n <\/blockquote>\n <p>\n In contrast to electricity generation, solar thermal technology \u2018takes a shortcut\u2019: it absorbs solar radiation and converts it directly into heat with very high efficiency. In practice, a collector heats a fluid (water or a water\/glycol mixture) or preheats air. The heat is stored in a tank (boiler\/storage tank) or used directly (e.g. preheating ventilation air).\n <\/p>\n\n <div class=\"kpi\">\n <div class=\"box\">\n <strong>Solar Thermal Collector<\/strong><br\/>\n Flat-plate, evacuated-tube, air (solar air heater), or concentrating (for higher-temperature applications).\n <\/div>\n <div class=\"box\">\n <strong>Storage<\/strong><br\/>\n Domestic hot water (DHW) tank, heating buffer tank, or process storage tank. Storage is the \u201csecret\u201d to stability.\n <\/div>\n <div class=\"box\">\n <strong>Control<\/strong><br\/>\n Circulation pumps, sensors, antifreeze protection, weather compensation, and control logic that prevents stagnation and overheating.\n <\/div>\n <\/div>\n\n\t\t\t<h3><span style=\"color: #339966;\"><strong>The main types of systems<\/strong><\/span><\/h3>\n <ul>\n <li><strong>* Water Heater Systems<\/strong> (classic, simple, very widespread): circulation is by natural flow.<\/li>\n <li><strong>* Forced circulation<\/strong> (with controller): better flexibility, larger installations, larger tanks.<\/li>\n <li><strong>* Drainback<\/strong> (self-draining): reduces risks of frost\/stagnation where hydraulically suitable.<\/li>\n <li><strong>* Solar air preheating<\/strong> for ventilation\/heating (ideal in industrial and agricultural buildings).<\/li>\n <li><strong>* Concentrated solar thermal<\/strong> for medium\/high temperature heat production (special industrial applications).<\/li>\n <\/ul>\n \n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/5\/52\/Solar_vacuum_tube_collectors_Thessaloniki.jpg\"\n alt=\"Solar vacuum tube collectors\"\n loading=\"lazy\"\n \/>\n <figcaption style=\"size: 40%;\">\n Evacuated-tube solar thermal collectors \u2014 high efficiency, especially under windy conditions and at lower temperatures. Source (CC BY-SA)\n <\/figcaption>\n <\/figure>\n\t\t\t\t \n<blockquote>\n\t<h2><strong><span style=\"color: #000080;\">\u00a0 Developments and modern applications<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n Solar thermal has evolved far beyond the \u201csimple\u201d water heater. Today we see:\n <\/p>\n <ul>\n <li><strong>* Better selective coatings<\/strong> and thermal insulation that increase efficiency and reduce losses.<\/li>\n <li><strong>* Large-scale systems<\/strong> for hotels, industries and facilities with continuous consumption.<\/li>\n <li><strong>* Solar district heating<\/strong> and large thermal fields with storage tanks.<\/li>\n <li><strong>* Solar thermal for industrial heat<\/strong>: process water preheating, washing, pasteurization, CIP, drying.<\/li>\n <li><strong>* Connection to heat pumps<\/strong>: the sun preheats the circuit and the heat pump \u201csteps up\u201d when needed.<\/li>\n <\/ul>\n \n <div class=\"note\">\n <strong>Why is it important;<\/strong><br\/>\n A large part of the final energy consumption in buildings and industry is <em>heat<\/em>. Solar thermal responds directly to this, with low complexity and long lifespan.\n <\/div>\n\t\t\t\t \n<blockquote>\n\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Savings in housing<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n At home, the most efficient application is <strong>domestic hot water (DHW)<\/strong>. In this case, solar thermal systems can cover a significant part of the annual needs, especially in areas with high sunshine. When the house also has heating needs, solar thermal can operate in an auxiliary role (with appropriate emitters and hydraulics), reducing boiler operation or the electrical consumption of a heat pump.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>What we evaluate to ensure economic viability<\/strong><\/span><\/h3>\n <ul>\n <li>- Daily\/seasonal DHW and heat consumption profile.<\/li>\n <li>- Available surface, orientation, slope, shading, wind\/salinity (coastal areas).<\/li>\n <li>- Collector type and desired temperatures.<\/li>\n <li>- Storage volume and strategy (how many hours\/days of autonomy).<\/li>\n <li>- Backup (boiler\/heat pump\/electric resistance) and automation.<\/li>\n <\/ul>\n\n\n <div class=\"hr\"><\/div>\n<blockquote>\n\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Energy savings in commercial buildings and production<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n Where solar thermal truly becomes a \u201cchampion\u201d is in buildings with <strong>constant and increased heat demand<\/strong>.\nExamples:\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Hotels & tourism<\/strong><\/span><\/h3>\n <p>\n DHW in hotels (showers, kitchens, laundry rooms, swimming pools\/spas) has high consumption, especially during periods of high sunshine. This makes solar thermal ideal: it \u201cworks\u201d when you need it most, drastically reducing oil\/LPG\/electricity.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Factories, crafts, laundries, food & beverages<\/strong><\/span><\/h3>\n <p>\n Many processes require hot water or low\/medium temperature heat: washing, preheating, cleaning, product preparation, drying. Solar energy can act as preheating which reduces boiler loading, improving overall production costs.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Livestock units & agricultural applications<\/strong><\/span><\/h3>\n <p>\n In livestock and agricultural facilities, heat is not a luxury: it is hygiene, productivity and quality.\n Hot water for washing\/disinfection, preheating of ventilation air, heating of spaces where required, and drying applications.\n Solar thermal energy in the air (solar air heaters) can dramatically reduce the cost of ventilation\/heating in large buildings.\n <\/p>\n\n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/2\/25\/Installation_of_%22Solar_roof%22_solar_thermal_installation_for_small_district_heating_plant_serving_several_homes.jpg\"\n alt=\"Installation of large-scale solar thermal collectors\"\n loading=\"lazy\"\n \/>\n <figcaption>\n Installation of solar thermal collectors for a small district heating unit\/multiple dwellings. Source (CC BY-SA)\n <\/figcaption>\n <\/figure>\n \n\t\t\t\t<blockquote>\n\t\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 The added benefit of thermal photovoltaics (PV\/T)<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n Thermal photovoltaics (PV\/T) combine <strong>electricity generation and heat generation<\/strong> from the same surface. The idea is simple: a photovoltaic panel converts part of the radiation into electricity, but a large part \u201cleaks\u201d as heat. In PV\/T, this heat is collected (with water or air) and utilized, while cooling the photovoltaic surface helps the electrical efficiency to remain better at high temperatures.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Where they offer practical advantages<\/strong><\/span><\/h3>\n <ul>\n <li><strong>* Limited space<\/strong>: when the roof\/facade does not \u201cfit\u201d both the thermal and photovoltaic field.<\/li>\n <li><strong>* Parallel need<\/strong> for electricity and heat (DHW, preheating, heat pump support).<\/li>\n <li><strong>* Heat pump systems<\/strong>: PV\/T can provide a \u201csource\u201d of heat or preheating, reducing consumption.<\/li>\n <li><strong>* Ventilation\/air conditioning<\/strong> in large buildings: PV\/T air can preheat fresh air and save fuel.<\/li>\n <\/ul>\n \n <figure>\n <img decoding=\"async\"\n src=\"https:\/\/www.pv-magazine.com\/wp-content\/uploads\/2024\/07\/1-s2.0-S0360544224022291-gr3_lrg-1536x1342.jpg\"\n alt=\"Schematic PV\/T system with heat pump and storage\"\n loading=\"lazy\"\n \/>\n <figcaption>\n Example of a PV\/T architecture combined with a heat pump and thermal storage (schematic).Source (CC BY 4.0)\n <\/figcaption>\n <\/figure>\n \n<blockquote>\n\t<h2><strong><span style=\"color: #000080;\">\u00a0 How to combine solar thermal and photovoltaics in practice<\/span><\/strong><\/h2>\n\t\t\t<\/blockquote>\n <p>\n The real value is not to \u201cput both\u201d, but to <strong>combine them correctly<\/strong>:\n <\/p>\n <ul>\n <li><strong>* Energy mapping<\/strong>: hourly\/daily profile of heat and electricity loads.<\/li>\n <li><strong>* Heat targeting<\/strong>: DHW, processes, preheating, heating support \u2014 where efficiency\/economy is maximum.<\/li>\n <li><strong>* Electricity targeting<\/strong>: self-consumption, smart load management, storage where needed.<\/li>\n <li><strong>* Integrated automation<\/strong>: priorities, thermal storage, pump control\/compensation, waste avoidance.<\/li>\n <li><strong>* Mechanical\/hydraulic quality<\/strong>: correct cross-sections, hydraulic balancing, anti-freeze\/anti-corrosion protection, maintainability.<\/li>\n <\/ul>\n\n <div class=\"cta\">\n <strong>Result: less fuel, less electricity, faster payback<\/strong>\n <p style=\"margin:0\">\n In facilities with constant heat demand (e.g. hotels, laundries, crafts, livestock) the combination of solar thermal + photovoltaics often leads to\n\t\t\t\t\t<strong> a short payback period of 3\u20136 years<\/strong>, when the study is based on real consumption data and the appropriate mix of technologies\/storage.\n <\/p>\n <p style=\"margin:10px 0 0\">\n In addition, we can structure <strong>financing solutions<\/strong> (e.g. installments\/equipment financing, energy service, contracts with a fixed price per kWh of heat\/electricity where applicable), so that the project is paid for by the savings itself.\n <\/p>\n <\/div>\n \n\t\t\t\t<blockquote>\n\t\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Quality, documentation and reliability<\/span><\/strong><\/h2>\n\t\t\t\t<\/blockquote>\n <p>\n In energy technology, performance is necessary but not sufficient. The market (and especially professional applications) demands documentation, certifications, measurability and transparency. At the European policy level, frameworks have been developed for evaluating \u201cgreen\u201d technologies and verifying claims by third parties, so that investments are based on real data rather than promises.\n <\/p>\n\n\t\t\t\t<h3><span style=\"color: #339966;\"><strong>Our approach<\/strong><\/span><\/h3>\n <ul>\n <li><strong>* Study based on data<\/strong> (consumption, temperatures, operating hours, actual fuel\/invoices).<\/li>\n <li><strong>* Design for maintenance<\/strong> (easy access, spares, avoidance of \"hidden\" failures).<\/li>\n <li><strong>* Measurements & monitoring<\/strong> where required (heat metering, production, savings KPI).<\/li>\n <li><strong>* Realistic business case<\/strong>: price scenarios, seasonality, storage, financing.<\/li>\n <\/ul>\n \n\t\t\t\t<blockquote>\n\t\t\t\t\t<h2><strong><span style=\"color: #000080;\">\u00a0 Frequently asked questions (FAQ)<\/span><\/strong><\/h2>\n<\/blockquote>\n <h3><span style=\"color: #339966;\"><strong>Does solar thermal energy work in winter?<\/strong><\/span><\/h3>\n <p>\n Yes. Production is lower than in summer (less radiation and greater losses), but it remains useful, especially when there is adequate storage capacity and the right temperature strategy.\n <\/p>\n\n <h3><span style=\"color: #339966;\"><strong>Which is more important: the collector or the storage?<\/strong><\/span><\/h3>\n <p>\n Both. However, storage and automation are often the \"hidden\" factors that make a system perform consistently and not waste energy.\n <\/p>\n\n <h3><span style=\"color: #339966;\"><strong>Can it be combined with a heat pump?<\/strong><\/span><\/h3>\n <p>\n Yes, and it is often a very efficient combination. Solar thermal energy and\/or PV\/T can preheat the circuit, reducing the work of the heat pump and its electricity consumption.\n <\/p>\n\n <h3><span style=\"color: #339966;\"><strong>What do I need to get a quotation?<\/strong><\/span><\/h3>\n <p>\n Ideally: (a) recent electricity and fuel bills, (b) a brief description of heat uses (DHW\/washing\/processes), (c) photos\/drawing of the roof or available surface area, (d) operating hours and seasonality.\n <\/p>\n\n <div class=\"hr\"><\/div>\n\n <div class=\"cta\">\n <strong>Would you like a solar thermal or PV\/T study for your installation?<\/strong>\n <p style=\"margin:0\">\n Contact us for a targeted pre-assessment: savings estimate, proposed architecture, and implementation plan with realistic payback period.\n <\/p>\n <p style=\"margin:10px 0 0\">\n <\/p>\n <\/div>\n\t\n <\/div>\n <\/main>\n<\/body>\n<\/html>\n<\/div><\/div><\/div><\/div><div id=\"pg-13912-2\" class=\"panel-grid panel-no-style\" ><div id=\"pgc-13912-2-0\" 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