{"id":2062,"date":"2026-01-08T10:55:09","date_gmt":"2026-01-08T10:55:09","guid":{"rendered":"https:\/\/blog.imit.it\/?p=2062"},"modified":"2026-01-08T10:55:09","modified_gmt":"2026-01-08T10:55:09","slug":"solar-thermal-and-photovoltaic-solar-differences-pros-and-cons","status":"publish","type":"post","link":"https:\/\/blog.imit.it\/en\/renewable-energies\/solar-thermal-and-photovoltaic-solar-differences-pros-and-cons\/","title":{"rendered":"Solar thermal and photovoltaic solar: differences, pros and cons"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">When it comes to <\/span><a href=\"https:\/\/blog.imit.it\/en\/renewable-energies\/what-is-meant-by-renewable-energy\/\"><span style=\"font-weight: 400;\">renewable energy<\/span><\/a><span style=\"font-weight: 400;\"> solutions for buildings, solar energy is often the first technology that comes to mind. However, under the broad label \u201csolar\u201d there are two very different solutions: <\/span><b>solar thermal<\/b><span style=\"font-weight: 400;\"> and <\/span><b>photovoltaic solar<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Both harness energy from the sun, but they do so in different ways and for different purposes. Understanding these differences is essential to choosing the most suitable solution, especially when planning a <\/span><a href=\"https:\/\/blog.imit.it\/en\/home\/new-house-heres-how-to-calculate-the-cost-of-heating\/\"><span style=\"font-weight: 400;\">new building<\/span><\/a><span style=\"font-weight: 400;\"> or a <\/span><a href=\"https:\/\/blog.imit.it\/en\/home\/renovation-what-type-of-heating-system-to-choose\/\"><span style=\"font-weight: 400;\">renovation<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><b>What is solar thermal?<\/b><\/h3>\n<p><b>Solar thermal<\/b><span style=\"font-weight: 400;\"> systems use solar energy to <\/span><b>produce heat<\/b><span style=\"font-weight: 400;\">. Solar collectors absorb solar radiation and transfer it to a heat transfer fluid, which is mainly used for:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>domestic hot water (DHW) production<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>heating integration<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>support for industrial processes or centralised systems<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The heat produced is stored in a tank (storage cylinder) and used when needed.<\/span><\/p>\n<h4><b>Pros<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">High efficiency in heat production<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Proven and reliable technology<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Excellent integration with <\/span><a href=\"https:\/\/blog.imit.it\/en\/news-en\/green-homes-and-condensing-boilers-the-key-to-decarbonizing-residential-consumption-in-italy\/\"><span style=\"font-weight: 400;\">boilers<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/blog.imit.it\/en\/home\/heat-pumps-advantages-disadvantages-and-a-comparison-with-other-heating-systems\/\"><span style=\"font-weight: 400;\">heat pumps<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/blog.imit.it\/en\/home\/heat-pumps-and-boilers-how-to-optimize-hybrid-temperature-control-in-existing-homes\/\"><span style=\"font-weight: 400;\">hybrid systems<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Significant reduction in gas or electricity consumption<\/span><\/li>\n<\/ul>\n<h4><b>Cons\u00a0<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Limited to heat production only<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Less flexible than photovoltaic systems<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Requires space for storage tanks<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Performance varies depending on seasonality and solar radiation<\/span><\/li>\n<\/ul>\n<h3><b>What is photovoltaic solar?<\/b><\/h3>\n<p><b>Photovoltaic solar<\/b><span style=\"font-weight: 400;\"> systems convert sunlight directly into <\/span><b>electricity<\/b><span style=\"font-weight: 400;\">, thanks to the photovoltaic effect of silicon cells. The electricity generated can be:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">used immediately for self-consumption<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">stored in <\/span><b>energy storage systems<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">fed into the grid<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Today, photovoltaic technology is one of the main tools for reducing the energy dependence of buildings.<\/span><\/p>\n<h4><b>Pros<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Electricity generation for multiple uses<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Possibility of self-consumption and storage<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Integration with <\/span><a href=\"https:\/\/blog.imit.it\/en\/home\/heat-pumps-advantages-disadvantages-and-a-comparison-with-other-heating-systems\/\"><span style=\"font-weight: 400;\">heat pumps<\/span><\/a><span style=\"font-weight: 400;\">, electric vehicle charging and <\/span><a href=\"https:\/\/blog.imit.it\/en\/home\/smart-home-how-much-is-the-transformation-worth-it\/\"><span style=\"font-weight: 400;\">home automation systems<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reduction in electricity bills and emissions<\/span><\/li>\n<\/ul>\n<h4><b>Cons\u00a0<\/b><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Does not produce heat directly<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Efficiency affected by orientation, shading and climate conditions<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Higher initial investment, especially with battery systems<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Variable production throughout the day<\/span><\/li>\n<\/ul>\n<h3><b>Solar thermal or photovoltaic: which one to choose?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The choice between solar thermal and photovoltaic depends on several factors:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Type of building<\/b><span style=\"font-weight: 400;\"> (residential, commercial, industrial)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Energy needs<\/b><span style=\"font-weight: 400;\"> (more heat or more electricity?)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Existing systems<\/b><span style=\"font-weight: 400;\"> (boiler, heat pump, hybrid systems)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Available space<\/b><span style=\"font-weight: 400;\"> (roof area, technical rooms)<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In many cases, the best solution is not an \u201ceither\/or\u201d choice, but a <\/span><b>combined approach<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><b>Integrating the two technologies<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Solar thermal and photovoltaic systems can coexist within the same building, working in a complementary way:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">solar thermal covers a significant share of domestic hot water demand<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">photovoltaic systems supply electricity to electrical installations and heat pumps<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">thermoregulation systems optimise the use of the energy produced<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This integration makes it possible to <\/span><b>maximise self-consumption<\/b><span style=\"font-weight: 400;\">, improve overall system efficiency and further reduce emissions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Solar thermal and photovoltaic solar are two different technologies, but both play a key role in the transition towards more efficient and sustainable buildings.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Solar thermal excels in heat production, while photovoltaic systems offer great flexibility in electricity generation. Properly assessing the advantages and limitations of each solution, together with careful system design and energy management, makes it possible to achieve maximum long-term benefits.<\/span><\/p>\n<p><a href=\"https:\/\/www.imit.it\/\"><span style=\"font-weight: 400;\">IMIT<\/span><\/a><span style=\"font-weight: 400;\"> is committed to supporting the energy transition through informed and responsible choices. Understanding the differences between technologies is the first step towards better investments, which is why we support professionals and end users in achieving maximum comfort with a strong focus on energy efficiency and reduced consumption.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When it comes to renewable energy solutions for buildings, solar energy is often the first technology that comes to mind. However, under the broad label \u201csolar\u201d there are two very different solutions: solar thermal and photovoltaic solar. Both harness energy from the sun, but they do so in different ways and for different purposes. Understanding [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2059,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[18],"tags":[],"class_list":["post-2062","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-renewable-energies"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Solar thermal and photovoltaic solar: differences, pros and cons - IMIT Blog - condividiamo oltre 100 anni di esperienza<\/title>\n<meta name=\"description\" content=\"When it comes to renewable energy solutions for buildings, solar energy is often the first technology that comes to mind. 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