{"id":13345,"date":"2025-07-04T16:43:09","date_gmt":"2025-07-04T16:43:09","guid":{"rendered":"https:\/\/ingenieriamasred.com\/?p=13345"},"modified":"2025-07-08T06:45:35","modified_gmt":"2025-07-08T06:45:35","slug":"what-are-solar-panels","status":"publish","type":"post","link":"https:\/\/ingenieriamasred.com\/en\/what-are-solar-panels\/","title":{"rendered":"What are solar panels and how do they work"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Sustainability and energy savings are becoming increasingly important in a world where measures to protect the planet are a must.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Legislation often mentions the need to switch to clean energy sources and, in order to get the public to switch to these, tax incentive programmes and economic aids are launched to make their installation much cheaper.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A<\/span><b> solar power system<\/b><span style=\"font-weight: 400;\"> is a fantastic option for individuals and businesses, easy to install and maintain, affordable and effective.\u00a0<\/span><\/p>\n<h2><b>What are solar panels<\/b><span style=\"font-weight: 400;\"> and how do they work?<\/span><\/h2>\n<p><a href=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2.jpg\"><span style=\"font-weight: 400;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-6501 size-full aligncenter lazyload\" title=\"What are solar panels and how do they work?\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2.jpg\" alt=\"What are solar panels and how do they work?\" width=\"1200\" height=\"742\" \/><noscript><img decoding=\"async\" class=\"wp-image-6501 size-full aligncenter lazyload\" title=\"What are solar panels and how do they work?\" src=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2.jpg\" alt=\"What are solar panels and how do they work?\" width=\"1200\" height=\"742\" srcset=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2.jpg 1200w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2-430x266.jpg 430w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2-150x93.jpg 150w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2021\/10\/alternative-energy-blog-img-2-700x433.jpg 700w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/noscript><\/span><\/a><\/p>\n<h2><span style=\"font-weight: 400;\">Understanding solar panels<\/span><\/h2>\n<p><b>Solar panels <\/b><span style=\"font-weight: 400;\">are devices that have the ability to convert sunlight into electricity. The technology used for this purpose consists of <\/span><b>photovoltaic cells<\/b><span style=\"font-weight: 400;\">, made of semiconductor materials that generate direct current (DC) when sunlight hits them.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This energy is transformed from DC to AC and fed into the household installation to power appliances, lights and any other device that runs on electricity.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A <\/span><b>solar power system<\/b><span style=\"font-weight: 400;\"> includes <\/span><b>solar panels<\/b><span style=\"font-weight: 400;\">, an inverter and, sometimes, a battery. The place where solar panels are usually installed is on the roofs of houses and buildings, facing the sunniest orientation.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">A typical solar power system includes:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Solar panels<\/b><span style=\"font-weight: 400;\">, to capture sunlight.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>An inverter<\/b><span style=\"font-weight: 400;\">, to convert the electricity.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Optional batteries<\/b><span style=\"font-weight: 400;\">, to store excess energy for use at night or during cloudy periods.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Panels are usually installed on <\/span><b>rooftops<\/b><span style=\"font-weight: 400;\">, ideally facing <\/span><b>south (in the Northern Hemisphere)<\/b><span style=\"font-weight: 400;\"> or the <\/span><b>sunniest direction<\/b><span style=\"font-weight: 400;\">, to maximize exposure to sunlight throughout the day. We guide you through the process of <a href=\"https:\/\/ingenieriamasred.com\/en\/solar-panels\/\" target=\"_blank\" rel=\"noopener\">selecting and installing a solar panel system<\/a> tailored to your space.<\/span><\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-13355 size-full lazyload\" title=\"How solar panels work?\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work.webp\" alt=\"How solar panels work?\" width=\"1024\" height=\"1024\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13355 size-full lazyload\" title=\"How solar panels work?\" src=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work.webp\" alt=\"How solar panels work?\" width=\"1024\" height=\"1024\" srcset=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work.webp 1024w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work-300x300.webp 300w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work-800x800.webp 800w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work-150x150.webp 150w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2025\/07\/how-solar-panels-work-768x768.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/p>\n<h2><span style=\"font-weight: 400;\">How do solar panels work?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Solar panels work by capturing sunlight and transforming it into usable electricity through a process known as the <\/span><b>photovoltaic effect<\/b><span style=\"font-weight: 400;\">. Here\u2019s a step-by-step breakdown of how this transformation happens:<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Step 1: Sunlight hits the solar cells<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">The process begins when <\/span><b>sunlight reaches the surface of the solar panels<\/b><span style=\"font-weight: 400;\">, which are made up of multiple <\/span><b>photovoltaic (PV) cells<\/b><span style=\"font-weight: 400;\">. These cells are built with <\/span><b>semiconductor materials<\/b><span style=\"font-weight: 400;\">, usually silicon, that react when exposed to light.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Step 2: The photovoltaic effect generates direct current (DC)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">When sunlight strikes the PV cells, the energy from the sun <\/span><b>excites the electrons<\/b><span style=\"font-weight: 400;\"> in the semiconductor material. This reaction causes the electrons to move, generating a flow of <\/span><b>direct current (DC)<\/b><span style=\"font-weight: 400;\"> electricity.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Step 3: An inverter converts DC to AC electricity<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Most household appliances use <\/span><b>alternating current (AC)<\/b><span style=\"font-weight: 400;\">, not DC. That\u2019s why a <\/span><b>solar inverter<\/b><span style=\"font-weight: 400;\"> is an essential part of any solar system. It takes the DC generated by the panels and <\/span><b>converts it into AC<\/b><span style=\"font-weight: 400;\">, making the electricity usable in your home or business.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Step 4: Electricity powers your home or business<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Once converted, the electricity flows through your electrical system and can be used to power <\/span><b>lights, appliances, charging devices, and more<\/b><span style=\"font-weight: 400;\">, just like electricity from the grid.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Step 5: Excess energy is sent to the grid or stored in batteries<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">If your system produces <\/span><b>more electricity than you need<\/b><span style=\"font-weight: 400;\">, that surplus energy can either:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Be <\/span><b>fed into the local power grid<\/b><span style=\"font-weight: 400;\">, often earning you credits (depending on local net metering policies), or<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Be <\/span><b>stored in batteries<\/b><span style=\"font-weight: 400;\"> for later use\u2014particularly useful at night or on cloudy days.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Step 6: Batteries ensure energy availability at night<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">For homes or systems designed to be <\/span><b>off-grid or self-sufficient<\/b><span style=\"font-weight: 400;\">, batteries are essential. They allow you to <\/span><b>store energy generated during the day<\/b><span style=\"font-weight: 400;\"> and use it when the sun isn\u2019t shining. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Our team of experts analyzes the project&#8217;s characteristics to <a href=\"https:\/\/ingenieriamasred.com\/en\/solar-panels\/\" target=\"_blank\" rel=\"noopener\">design an efficient photovoltaic energy solution<\/a>.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Benefits of using solar panels for your home or business<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Using <\/span><b>solar panels <\/b><span style=\"font-weight: 400;\">at home or installing them in a business has many advantages.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Energy and money savings<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">One of the most immediate benefits of solar energy is the <\/span><b>reduction in electricity bills<\/b><span style=\"font-weight: 400;\">. According to the <\/span><b>International Renewable Energy Agency (IRENA)<\/b><span style=\"font-weight: 400;\">, households can save between <\/span><b>40% and 70% on electricity costs per year<\/b><span style=\"font-weight: 400;\">, depending on system size and consumption habits.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In Spain, the <\/span><b>IDAE (Instituto para la Diversificaci\u00f3n y Ahorro de la Energ\u00eda)<\/b><span style=\"font-weight: 400;\"> estimates that an average 4 kWp residential solar installation can <\/span><b>generate up to 6,000 kWh\/year<\/b><span style=\"font-weight: 400;\">, enough to cover 80%\u2013100% of the electricity needs of a typical household. That translates into <\/span><b>annual savings of over 800\u20131,000\u20ac<\/b><span style=\"font-weight: 400;\">, depending on location and tariffs.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">Source: IRENA Renewable Energy Benefits Report, 2022; IDAE \u2013 Gu\u00eda T\u00e9cnica de Autoconsumo, 2023.\u00a0<\/span><\/i><\/p>\n<h3><span style=\"font-weight: 400;\">Sustainability and environmental impact<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Solar energy is 100% <\/span><b>clean and renewable<\/b><span style=\"font-weight: 400;\">, producing <\/span><b>zero greenhouse gas emissions<\/b><span style=\"font-weight: 400;\"> during operation. For every kWh generated with solar instead of fossil fuels, approximately <\/span><b>700g of CO\u2082<\/b><span style=\"font-weight: 400;\"> are avoided.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">According to the <\/span><b>European Environment Agency<\/b><span style=\"font-weight: 400;\">, switching to solar panels can reduce a home&#8217;s carbon footprint by <\/span><b>over 1,000 kg of CO\u2082 per year<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">Source: EEA Report No. 13\/2021 \u2013 Renewable energy in Europe.<\/span><\/i><\/p>\n<h3><span style=\"font-weight: 400;\">Increased property value<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Homes with solar panels tend to have <\/span><b>higher market value<\/b><span style=\"font-weight: 400;\"> and sell faster. A study by <\/span><b>Zillow (US)<\/b><span style=\"font-weight: 400;\"> found that properties with solar installations sell for an average of <\/span><b>4.1% more<\/b><span style=\"font-weight: 400;\"> than comparable homes without them. In Spain, real estate portals como <\/span><b>Idealista<\/b><span style=\"font-weight: 400;\"> tambi\u00e9n reflejan este incremento, especialmente en zonas con alta radiaci\u00f3n solar.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">Source: Zillow Economic Research, \u201cHomes with Solar Panels Sell for More\u201d, 2019.<\/span><\/i><\/p>\n<h3><span style=\"font-weight: 400;\">Energy independence and stability<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Installing solar panels with or without batteries provides a level of <\/span><b>energy independence<\/b><span style=\"font-weight: 400;\">. During periods of grid instability or price volatility, having your own generation system ensures <\/span><b>stable supply and protection against rising costs<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Additionally, when combined with <\/span><b>battery storage systems<\/b><span style=\"font-weight: 400;\">, users can cover up to <\/span><b>90% of their annual consumption<\/b><span style=\"font-weight: 400;\">, making them largely autonomous from external suppliers.<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">Source: European Commission \u2013 Solar Energy Strategy, 2022.<\/span><\/i><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-11451 size-large lazyload\" title=\"Energy independence and stability\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1-1201x800.jpeg\" alt=\"Energy independence and stability\" width=\"1201\" height=\"800\" \/><noscript><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-11451 size-large lazyload\" title=\"Energy independence and stability\" src=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1-1201x800.jpeg\" alt=\"Energy independence and stability\" width=\"1201\" height=\"800\" srcset=\"https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1-1201x800.jpeg 1201w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1-400x267.jpeg 400w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1-768x512.jpeg 768w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1-1536x1023.jpeg 1536w, https:\/\/ingenieriamasred.com\/wp-content\/uploads\/2023\/06\/5-1.jpeg 1600w\" sizes=\"(max-width: 1201px) 100vw, 1201px\" \/><\/noscript><\/p>\n<h2><span style=\"font-weight: 400;\">Key factors to consider before installing solar panels<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">With these great advantages, it is understandable that many individuals consider switching to solar power. What are the key factors to consider before installing solar panels?<\/span><\/p>\n<ul>\n<li><b>Building orientation. <\/b><span style=\"font-weight: 400;\">The sun exposure is crucial for the system to work, so the building\u2019s geographical location and orientation and the amount of sunlight it gets throughout the year is the first thing to consider.\u00a0<\/span><\/li>\n<li><b>Roof condition<\/b><span style=\"font-weight: 400;\">. Make sure the roof is in perfect shape before installing panels to avoid unpleasant surprises.\u00a0<\/span><\/li>\n<li><b>Regulations<\/b><span style=\"font-weight: 400;\">. Check your local regulations and make sure you have all the permits and meet all the criteria required to install solar panels.<\/span><\/li>\n<li><b>Energy usage<\/b><span style=\"font-weight: 400;\">. Sizing is important, so make sure you study your energy usage and the amount of electricity your installation will be able to produce.<\/span><\/li>\n<li><b>Budget<\/b><span style=\"font-weight: 400;\">. Notice a <\/span><b>solar power system <\/b><span style=\"font-weight: 400;\">is an investment, so initial expenses can be high. First, check if there are any government aids available and, if you need it, consider financing options. Keep in mind this is an investment that is sure to pay off.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">How solar panels can save you money and reduce your carbon footprint<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Whether you are concerned about your energy bills or about your carbon footprint, solar panels are a great solution and a safe investment.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The energy savings month after month will pay for the initial installation shortly, and you will contribute to mitigating climate change and taking care of the planet at the same time.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">All in all, <\/span><b>solar panels <\/b><span style=\"font-weight: 400;\">are not just a trend, they are a reliable source of energy that millions are switching to because of its sustainability, efficiency and costs. A smart option for homes and businesses.\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sustainability and energy savings are becoming increasingly important in a world where measures to protect the planet are a must.\u00a0<\/p>\n","protected":false},"author":2,"featured_media":13024,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"categories":[137],"tags":[],"class_list":["post-13345","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-panel-articles"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/posts\/13345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/comments?post=13345"}],"version-history":[{"count":4,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/posts\/13345\/revisions"}],"predecessor-version":[{"id":13357,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/posts\/13345\/revisions\/13357"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/media\/13024"}],"wp:attachment":[{"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/media?parent=13345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/categories?post=13345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ingenieriamasred.com\/en\/wp-json\/wp\/v2\/tags?post=13345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}